181 results on '"Laser technology"'
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2. Configurable cloud-connected iPad controlled multimodal ophthalmic laser
- Author
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Jukka-Pekka Alanko, Visa Kaivosoja, Timo Tanila, Eero Koivumäki, Zoe Ylöniemi, Petteri Uusimaa, and Ivan Baldin
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Laser technology ,law ,Computer science ,business.industry ,Optoelectronics ,Beam shaping ,Cloud computing ,Laser beam quality ,Laser ,business ,Semiconductor laser theory ,law.invention - Abstract
Different wavelength lasers are widely used in ophthalmology for example for selectively heating certain tissues of the eye or unleashing the potential of photoactive pharmaceuticals. The problem with many ophthalmic laser-based treatments such as photodynamic therapy for age-related macular degeneration is that the laser technology is outdated and no longer supported despite the wide clinical use of these therapy modalities. Modulight has developed a configurable cloud-connected ophthalmic laser device that can house any of Modulight’s semiconductor lasers and is wirelessly controlled with an iPad. In addition to novel ophthalmic laser technology, Modulight has also developed a novel beam shaping unit which yields superior beam quality and enables exceptionally large treatment spots eliminating the need for multi-spot treatment for larger lesions.
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- 2021
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3. Multi-functional laser precision processing system
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Laibang Zhang, Cong Zhang, and Jianpu Xi
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Computer science ,Interface (computing) ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Motion controller ,Laser ,Signal ,Power (physics) ,law.invention ,Laser technology ,law ,Electronic engineering ,ComputingMethodologies_GENERAL ,Laser power scaling ,Pulse-width modulation - Abstract
With the improvement of processing level, the combination of laser technology and numerical control system has become the trend of laser precision processing system. Different materials also have different requirements on laser power. The system adopts the mode of PC+GTS motion controller to accomplish laser precision processing of different workpieces. The power of laser processing is changed by modifying the parameters of PWM signal with the instructions of human-computer interface program. The laser power can be adjusted quickly to achieve precision processing of different materials and types.
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- 2021
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4. Application and development trend of laser technology in military field
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Jianbo Yang, Siguang Zong, and Ji Qiang
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Engineering ,business.industry ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,ComputerApplications_COMPUTERSINOTHERSYSTEMS ,Laser ,Field (computer science) ,law.invention ,Laser technology ,law ,Manufacturing ,Systems engineering ,ComputingMethodologies_GENERAL ,Electronics ,business - Abstract
Laser technology is widely used in military, industrial manufacturing, electronics, holography, spectroscopy and other fields. The application of laser technology in military affairs has revolutionized the war. Military laser technology covers many aspects of military operations, such as reconnaissance warning, weapon guidance, high-power laser weapons, communication etc. This paper begins with the definition of laser, and briefly introduces the development history of laser in military application. Then the five main applications of laser in military are introduced. The current development situation is discussed and the shortcomings are analyzed. Finally, the paper summarizes and prospects the future development trend of laser in military.
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- 2020
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5. Optical resonant measurement applied in magnetic field sensor
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Xiaofu He, Liang Bing, Xiaoliang Zhang, Qiang Huang, Lijie Song, and Bo Lang
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Physics ,Laser technology ,Larmor precession ,Optics ,business.industry ,Amplifier ,Scalar (physics) ,Vector projection ,Sensitivity (control systems) ,business ,Atomic magnetometer ,Magnetic field - Abstract
Magnetic phenomenon is one of the earliest physical phenomena realized by human. The technology of high sensitivity magnetic field measurement has been used in many applications such as geophysical prospection, aerospace engineering, earth-magnetism navigation, biomedicine, fundamental physics, and so on. With the development of laser technology, the study of atomic magnetometer makes great progresses for the past few decades. This paper reports a magnetic field sensor with optical resonant measurement. Experiments have demonstrated the scalar component of the magnetic field with the resonant precession frequency of the coherent atoms and the vector component with the Lock-in Amplifier (LIA) phase shift on the field angle.
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- 2020
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6. Front Matter: Volume 11562
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Zhiyi Wei, Wenxue Li, Xuechun Lin, Wei Shi, Jing Ma, Yangjian Cai, Yongzhen Huang, Jian Zhang, Cunlin Zhang, Pu Zhou, and Zhaojun Liu
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Laser technology ,Engineering ,business.industry ,Optoelectronics ,business - Published
- 2020
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7. Creation of a technician education program in laser and precision optical technology at Pasadena City College
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Brian Monacelli
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Laser technology ,Engineering ,Medical education ,ComputingMilieux_THECOMPUTINGPROFESSION ,Work (electrical) ,business.industry ,Technician ,Workforce ,ComputingMilieux_COMPUTERSANDEDUCATION ,Community college ,business ,Curriculum - Abstract
An Associate of Science Degree is essential for technical students who seek applied, hands-on employment in the technical workforce after education at a community college. Pasadena City College administration has stepped up to work with experienced faculty to create a program in Laser Technology that is based on tested, industrial skill-driven curricula. This paper will discuss the foundation of this Laser Tech Program and its guidance by its many industrial advisors.
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- 2020
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8. Highly crystalline organic light emitting diode for high current density operation
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Stefan Meister, Michael Sawatzki, Hans Kleemann, Shu-Jen Wang, and Karl Leo
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Laser technology ,Solid-state lighting ,Materials science ,Single crystal growth ,law ,business.industry ,OLED ,Optoelectronics ,Degree of order ,business ,High current density ,law.invention ,Amorphous solid - Abstract
The high degree of order in organic single crystals often leads to optimum charge transport properties and their robustness under high current density which is attractive for solid state lighting and laser technology. However, conventional method of single crystal growth based on physical vapour transport is unsuitable for device integration and large area applications. Here, we present a vacuum processed approach to prepare organic single crystals on inch sized substrates and integrate them into organic light emitting devices (OLED). The device performance are characterized in comparison to standard OLED based on amorphous materials.
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- 2020
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9. Front Matter: Volume 11437
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Zhiyi Wei, Pu Wang, Franz X. Kärtner, Stefan A. Weber, and Chunqing Gao
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Laser technology ,Engineering ,business.industry ,law ,Optical instrument ,business ,Engineering physics ,law.invention - Published
- 2020
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10. Triggering and guiding of lightning by ultrafast lasers
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Haitao Zhang and Qihang Gong
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Laser technology ,law ,Computer science ,Thunderstorm ,Plasma channel ,Laser power scaling ,Plasma ,Laser ,Engineering physics ,Lightning ,Ultrashort pulse ,law.invention - Abstract
Lightning causes great property losses to human beings every year, therefore how to control lightning and reduce its harm has always been one of the hotspots of the scientific community. In recent years, with the development of high energy ultra-fast laser technology, the peak power of ultrafast laser has been able to reach the GW, TW and even PW. Under the support of such high peak power laser technology, a new type of lightning triggering and guiding technology -- lasertriggered lightning has gradually attracted researchers’ attention. When the laser power intensity reaches TW, Kerr selffocusing effect and plasma defocusing effect will reach dynamic equilibrium. At this time, a light filament with a diameter of a few millimeters and a length of several hundred meters will be formed in the atmosphere, and a low-density plasma channel will be generated in the path. Then a leader is formed through the plasma channel which can trigger and guide discharge from the thunderstorm cloud. Compared with the traditional triggering and guiding of lightning technology, triggering and guiding of lightning by ultrafast Laser has the advantages of flexibility, pollution-free, no consumable consumption, flexible initiative, etc. It will be an important lightning triggering and guiding technology in the future, and it has gradually attracted the attention of scholars from various countries and has obtained a lot of research results. This paper mainly introduces the basic principles of laser-triggered-and-guided lightning, including the laser filament formation mechanism, the basic principle of laser-triggered-and-guided lightning and its history and recent research progress. Moreover, the scientific difficult problems and possible solutions for laser-triggered-and-guided lightning are also discussed, which can be a reference for future development of laser-triggered-and-guided lightning technology.
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- 2020
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11. Front Matter: Volume 11333
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Takunori Taira, Wenxue Li, Jian Zhang, Pu Zhou, and Shibin Jiang
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Laser technology ,Materials science ,business.industry ,law ,Optoelectronics ,business ,Laser ,law.invention - Published
- 2019
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12. Front Matter: Volume 11170
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Jianrong Qiu, Minlin Zhong, Pu Wang, Zhenxi Zhang, Jianqiang Zhu, and Weibiao Chen
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Laser technology ,Engineering ,business.industry ,business ,Engineering physics - Published
- 2019
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13. Front Matter: Volume 10981
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Mark Dubinskiy and Timothy C. Newell
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Laser technology ,Engineering ,business.industry ,business ,Engineering physics - Published
- 2019
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14. Evaluation of mold materials for precision glass molding
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Marcel Friedrichs, Tim Grunwald, and Thomas Bergs
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Laser technology ,Materials science ,Mold ,medicine ,Chalcogenide glass ,Polishing ,Substrate (printing) ,Molding (process) ,Electronics ,Composite material ,medicine.disease_cause ,Grinding - Abstract
Driven by the wide range of applications in the fields of laser technology, biomedicine and consumer electronics, etc., the demand for high-quality lenses with complex geometries and small dimensions is rapidly rising. Since grinding and polishing of such lenses is neither practically nor economically viable, Precision Glass Molding (PGM) has become a popular production method. PGM is a replicative technology for producing high-precision optical lenses in medium or high volumes. During the one-cycle molding process, a glass preform is heated until the viscous state and afterwards pressed into the desired shape using two high-precise molding tools. This process permits the direct and efficient manufacture of high shape accuracy and surface quality optics without any mechanic post-processing step. The efficiency of PGM processes depend primarily on the lifetime of the high-precision molding tools. Therefore, various investigations focus on enhancing the molding tool lifetime. This work focuses on the evaluation of suitable mold materials for PGM, whereby different substrate materials as well as protective coatings are considered. At this, three different kinds of glass with varying molding temperature were investigated: common optical glass, infrared transmissive chalcogenide glass, and fused silica. The molding temperature of common optical glass ranges from 400°C to 700°C, whereas chalcogenide glass is molded at around 250°C. Fused silica requires a more challenging molding temperature of about 1400°C. Due to the varying molding temperatures, different mold materials can be evaluated for each of the investigated glasses.
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- 2019
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15. Front Matter: Volume 11033
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Thomas Butcher and Joachim Hein
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Laser technology ,High energy ,Materials science ,business.industry ,High intensity ,Optoelectronics ,business ,Power (physics) - Published
- 2019
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16. Study on flat-top shaping technology in picosecond laser micro- machining
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Zhongwei Fan, Shuzhen Nie, Tianzhuo Zhao, and Jin Yu
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Diffraction ,Materials science ,Picosecond laser ,business.industry ,Phase (waves) ,Physics::Optics ,Laser technology ,Focal position ,Optics ,Machining ,Physics::Accelerator Physics ,business ,Beam (structure) ,Gaussian beam - Abstract
In order to achieve the uniform picosecond laser micro-machining effect, this study carries out the research of shaping the original incident Gaussian beam into a micron-level flat-top beam at the focal position. Based on the principle of diffractive optics, the phase distribution of the shaping element is calculated which meets the micron-level flat-top beam output requirements and the verification of the shaping effect after transforming through the phase distribution is simulated. When the simulated output beam distribution meets the design requirements, the shaping elements is manufactured. Finally, the shaping element is used in a picosecond laser micro-scribing experiment and the scribing effect is analyzed. The final experimental results show that the picosecond laser micro-scribing test is carried out with the shaped flat-top beam, and the uniform scribing effect is obtained which satisfies the design requirements.
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- 2019
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17. High power blue laser system for manufacturing and defense applications
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Mark S. Zediker
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Blue laser light ,Laser technology ,Blue laser ,Materials science ,law ,Underwater imaging ,Fiber laser ,Welding ,Laser ,Engineering physics ,law.invention ,Power (physics) - Abstract
There have been two significant shifts in laser technology over the last 40 years, beginning with the CO2 laser being displaced by the Nd:YAG laser, then the Nd:YAG laser being displaced by fiber lasers. Today, the blue laser technology being developed will be the next major shift in technology for both industrial and military applications. The high-power blue laser light offers many new capabilities that were unachievable without a high power visible light source. These applications range from welding copper to transmitting high power laser energy through water for underwater imaging and communications. This paper will introduce this new technology, summarize the tests performed to date on the industrial applications and review a number of military applications that could benefit from a high power visible light source.
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- 2019
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18. Front Matter: Volume 10844
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Lijun Wang, Wei Shi, Zejin Liu, Pu Zhou, and Shibin Jiang
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Laser technology ,Engineering ,business.industry ,business ,Engineering physics - Published
- 2018
- Full Text
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19. Development of laser technology in Poland: 2018
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Jan K. Jabczynski and Ryszard S. Romaniuk
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Remote detection ,Laser technology ,High energy ,Engineering ,law ,business.industry ,New materials ,Laser ,business ,Telecommunications ,law.invention ,Semiconductor laser theory - Abstract
The paper is a concise digest of works presented during the 12th National Symposium on Laser Technology (SLT2018) [1]. The Symposium is organized since 1984 every three years [2-11], now every two years. SLT2016 and SLT 2018 were organized by the Institute of Optoelectronics, Military University of Technology (IO, WAT) Warsaw, with cooperation of Warsaw University of Technology (PW), Warsaw University (UW), and Wroclaw University of Technology (PWr) in Jastarnia. SLT 2018 was organized on 25-27 September 2018. The Symposium is a representative portrait of the laser technology research in Poland. Symposium Proceedings are traditionally published by SPIE [12-21]. The meeting has gathered around 120 participants who presented around 100 research and technical papers. The Symposium organized now every 2 years is a good representation of laser technology and laser applications development in Poland at university laboratories, governmental institutes, company R&D laboratories, etc. The SLT also presents the current technical projects under realization by the national research, development and industrial teams. Topical tracks of the Symposium, traditionally divided to two large areas – sources and applications, were: laser sources in near and medium infrared, picosecond and femtosecond lasers, optical fiber lasers and amplifiers, semiconductor lasers, high power and high energy lasers and their applications, new materials and components for laser technology, applications of laser technology in measurements, metrology and science, military applications of laser technology, laser applications in environment protection and remote detection of trace substances, laser applications in medicine and biomedical engineering, laser applications in industry, technologies and material science.
- Published
- 2018
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20. Front Matter: Volume 10974
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Ryszard S. Romaniuk and Jan K. Jabczynski
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Laser technology ,Materials science ,business.industry ,law ,Optoelectronics ,business ,Laser ,law.invention - Published
- 2018
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21. Experiences integrating and using laser educational kits at Irvine Valley College's laser technology program
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Donn M. Silberman, Desiré Whitmore, Stefan Forschner, Debbie Donahue, Brian Monacelli, and Gabriel Blanks
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Laser technology ,Engineering ,Multimedia ,law ,business.industry ,ComputingMilieux_COMPUTERSANDEDUCATION ,Laser ,business ,computer.software_genre ,Curriculum ,computer ,law.invention - Abstract
Irvine Valley College was the first school in the United States to have both HeNe and Nd:YAG open-cavity laser educational kits from eLas (formerly PI miCos Campus) successfully integrated into their extensive hands-on Laser Technology program. This paper is presented from two students’ perspective, describing the students’ experiences and including comments from the professors who integrated the laser kits into the curriculum. The main benefits these laser education kits provide for both students and faculty include their specific industrial-quality design for intensive hands-on education. Students learn about laser components and the techniques required to align a laser cavity. Theses laser systems come with lesson plans and experiments that faculty may use as is, or modify to suit a particular emphasis in their curriculum. Once alignment is achieved on a repeatable basis, then many experiments can be performed successfully, such as studying laser mode structure, input current versus output power, and wavelength stability.
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- 2018
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22. Semiconductor guidestar laser for astronomy, space, and laser communications: prototype design and expected performance
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Francois Rigaut, Gregory J. Fetzer, Rob Sharp, Yue Gao, Nathan Woody, Luke Hill, Michael Goodwin, Andrew Lambert, Steve Rako, Steven Floyd, James Mason, Celine d'Orgeville, Francis Bennet, Antonin Bouchez, Sandalphon, Stuart D. Ryder, and Daniel A. Shaddock
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Engineering ,business.industry ,Astronomy ,Laser ,law.invention ,Laser technology ,Telescope ,Laser guide star ,law ,Observatory ,Research council ,Satellite ,business ,Free-space optical communication - Abstract
A new type of sodium guidestar laser based on semiconductor laser technology is being developed by the astronomy, space, and laser communication communities in Australia and the United States, in partnership with laser manufacturer Arete Associates. Funding has been secured from the Australian Research Council and the Australian National University, with support from academic (UNSW) and industry partners (AAO, GMTO, EOS, Lockheed Martin). The consortium aims to develop a full scale prototype of the Semiconductor Guidestar Laser. The laser, to be delivered in 2019, will be initially installed on the EOS Satellite and Debris Tracking Station 1.8m telescope at Mount Stromlo Observatory where it will be thoroughly tested, on sky and in real operation conditions. This will be the first time that a Laser Guide Star is created in Australian skies. We present the project motivation and objectives, laser development and test plans, and the preliminary test results obtained to date.
- Published
- 2018
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23. Front Matter: Volume 10637
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Mark Dubinskiy and Timothy C. Newell
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Laser technology ,Engineering ,business.industry ,business ,Engineering physics - Published
- 2018
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24. A novel multimodal optical concept for the detection of bacteria and microplastics in the environment (Conference Presentation)
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Jürgen Schnekenburger, Björn Kemper, and Steffi Ketelhut
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Laser technology ,Pollutant ,Microplastics ,law ,Microfluidics ,Environmental science ,Particle ,Nanotechnology ,Plastic waste ,Mid infrared spectroscopy ,Filtration ,law.invention - Abstract
Microplastics are small plastic particles contained in cosmetics or caused by abrasion and decomposition of plastic waste in the environment. The increasing pollution by plastic particles and fibers in the size of less than 5 millimeters is great challenge for environmental management. The uptake of microplastics by living organisms may cause mechanical injuries of the gastrointestinal tract and triggers inflammation. The adsorption of pollutants to the particle surface still increases the potential hazard of the particles. Therefore, there is an urgent need for methods to identify microplastics in the environment, its sources of input and, of course, the risk of microplastic particles. The here presented research project MicroPlastiCarrier will develop efficient device concepts for the optical detection and identification of microplastic particles and bacteria in wastewater. The state of the art method is the filtration of liquids and the subsequent detection of microplastic particles with FT-IR. The project aims to overcome the limitations of this technique by the safe identification of microplastics up to a size of up to 250 micrometers in liquid media. This is achieved by a novel combination of optical spectroscopy using infrared light, quantitative phase contrast imaging and Flow Cytometry This principle analyses particles and bacteria in different detection channels because of their size and their absorption and refraction index properties at several wavelengths of light. Combined with innovative microfluidics and laser technology, the device prospects to achieve a significantly higher number of measurements and a speed advantage compared to currently used, labor-intensive filtration processes.
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- 2018
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25. Research progress of VO2 thin film as laser protecting material
- Author
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Zhiwei Liu, Yuan Lu, and Dianxin Hou
- Subjects
Materials science ,Phase transition temperature ,genetic structures ,Laser ,Engineering physics ,humanities ,law.invention ,Preparation method ,Laser technology ,Battlefield ,law ,sense organs ,Thin film ,human activities ,circulatory and respiratory physiology - Abstract
With the development of laser technology, the battlefield threat of directional laser weapons is becoming more and more serious. The blinding and destruction caused by laser weapons on the photoelectric equipment is an important part of the current photo-electronic warfare. The research on the defense technology of directional laser weapons based on the phase transition characteristics of VO2 thin films is an important subject. The researches of VO2 thin films are summarized based on review these points: the preparation methods of VO2 thin films, phase transition mechanism, phase transition temperature regulating, interaction between VO2 thin films and laser, and the application prospect of vo2 thin film as laser protecting material. This paper has some guiding significance for further research on the VO2 thin films in the field of defense directional laser weapons.
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- 2018
- Full Text
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26. New approaches in teaching laser engineering classes: modeling and building up a laser
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Michael Schmidt, Christoph Pflaum, and Ilya Alexeev
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Laser technology ,Engineering ,Focus (computing) ,Software ,Design objective ,business.industry ,law ,Systems engineering ,Extremely Helpful ,business ,Laser ,Complement (set theory) ,law.invention - Abstract
We present a simulation tool to model performance of a bulk solid state laser and propose several ways how this tool can be used to enhance educational experience of the student studying laser technology. In one of the possible approaches, the ASLD software can complement available educational laser kits to provide the students with more universal practical training. In the second approach, which is the primary focus of this contribution, the ASLD software can be used as a development tool that allows students to verify their understanding of the subject as well as to propose and verify their own design ideas. The software can be extremely helpful if an experimantal setup has to be built from already present optical components in order to reduce the cost of training or if specific design objectives have to be attained.
- Published
- 2017
- Full Text
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27. Has optics finally found its rightful place in physics curriculum in universities of Eastern Africa?
- Author
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Alphonse Niyibizi
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Laser technology ,Physics ,Optics ,Geography ,business.industry ,Mathematics education ,East africa ,Photonics ,business ,Curriculum - Abstract
For a long time, optics has been the "neglected child" in physics university curriculum in Kenya and indeed in East Africa as a whole! But due to emerging applications of laser technology and photonics, some physics departments have started developing undergraduate and postgraduate programmes in optics, lasers and photonics. What are the challenges and chances of success?
- Published
- 2017
- Full Text
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28. Front Matter: Volume 10238
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Joachim Hein
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High energy ,Materials science ,business.industry ,High intensity ,02 engineering and technology ,01 natural sciences ,Power (physics) ,010309 optics ,Laser technology ,020210 optoelectronics & photonics ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Optoelectronics ,business - Published
- 2017
- Full Text
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29. Front Matter: Volume 10192
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Stephen G. Post and Mark Dubinskii
- Subjects
Laser technology ,Engineering ,business.industry ,business ,Engineering physics - Published
- 2017
- Full Text
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30. Front Matter: Volume 10159
- Author
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Jan K. Jabczynski, Zygmunt Mierczyk, Ryszard S. Romaniuk, and Krzysztof Kopczynski
- Subjects
Laser technology ,Materials science ,business.industry ,law ,Optoelectronics ,business ,Laser ,law.invention - Published
- 2016
- Full Text
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31. Development of laser technology in Poland: 2016
- Author
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Ryszard S. Romaniuk, Zdzislaw Jankiewicz, and Jan K. Jabczynski
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Remote detection ,High energy ,Engineering ,business.industry ,Electrical engineering ,New materials ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Laser ,01 natural sciences ,Semiconductor laser theory ,law.invention ,010309 optics ,Laser technology ,law ,0103 physical sciences ,0210 nano-technology ,business ,Telecommunications - Abstract
The paper is an introduction to the volume of proceedings and a concise digest of works presented during the XI th National Symposium on Laser Technology (SLT2016) [1]. The Symposium is organized since 1984 every three years [2-8]. SLT2016 was organized by the Institute of Optoelectronics, Military University of Technology (IO, WAT) [9], Warsaw, with cooperation of Warsaw University of Technology (WUT) [10], in Jastarnia on 27-30 September 2016. Symposium Proceedings are traditionally published by SPIE [11-19]. The meeting has gathered around 150 participants who presented around 120 research and technical papers. The Symposium, organized every 3 years is a good portrait of laser technology and laser applications development in Poland at university laboratories, governmental institutes, company R&D laboratories, etc. The SLT also presents the current technical projects under realization by the national research, development and industrial teams. Topical tracks of the Symposium, traditionally divided to two large areas – sources and applications, were: laser sources in near and medium infrared, picosecond and femtosecond lasers, optical fiber lasers and amplifiers, semiconductor lasers, high power and high energy lasers and their applications, new materials and components for laser technology, applications of laser technology in measurements, metrology and science, military applications of laser technology, laser applications in environment protection and remote detection of trace substances, laser applications in medicine and biomedical engineering, laser applications in industry, technologies and material engineering.
- Published
- 2016
- Full Text
- View/download PDF
32. Glancing angle deposition for production of optical components in UV region
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Rytis Buzelis, Lina Grinevičiūtė, Tomas Tolenis, Laurynas Petronis, and Ramutis Drazdys
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Glancing angle deposition ,Materials science ,business.industry ,02 engineering and technology ,Refractive index profile ,021001 nanoscience & nanotechnology ,01 natural sciences ,010309 optics ,Laser technology ,Wavelength ,Optics ,0103 physical sciences ,Broadband ,Thin film ,0210 nano-technology ,Porosity ,business - Abstract
Technological developments in laser technology require advancements in optical components. Such demand is particularly important in UV spectral region. Antireflection coatings (AR) and waveplates as a widely used optical elements were produced based on glancing angle deposition (GLAD) method. Superior optical performance was measured for AR thin films. Broadband and broad-angle antireflection coatings were manufactured by using multilayer system when changing the refractive index profile by varying the porosity of material. SiO2, Al2O3 and LaF3 materials were used for formation of waveplates for UV region. An investigation of optical and resistant performance were conducted. All materials showed optical losses at the wavelength of 355 nm. Possible technological solutions are presented and investigated.
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- 2016
- Full Text
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33. Trends in high-power ultrafast lasers
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Andreas Diebold, Ursula Keller, Matthias Golling, Florian Emaury, I. J. Graumann, and Clara J. Saraceno
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High power lasers ,business.industry ,Computer science ,02 engineering and technology ,Laser ,01 natural sciences ,7. Clean energy ,Engineering physics ,Power (physics) ,law.invention ,Pulse (physics) ,010309 optics ,Laser technology ,Important research ,020210 optoelectronics & photonics ,Optics ,Mode-locking ,law ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,business ,Ultrashort pulse - Abstract
Ultrafast laser sources are one of the main achievements of the past decades. Finding new avenues to obtain higher average powers and pulse energies from these sources is currently a topic of important research efforts both for scientific and industrial applications. SESAM modelocked thin-disk lasers are one of the most promising laser technology to reach this goal from table-top systems: recently, average powers of 275 W and pulse energies of 80 μJ were demonstrated directly from a modelocked oscillators without additional external amplification. In this presentation, we will review the current state-of-the art of such table-top systems and present guidelines for future kilowatt-class systems.
- Published
- 2016
- Full Text
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34. Children acceptance of laser dental treatment
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Carmen Todea and Andreea Lazea
- Subjects
medicine.medical_specialty ,business.industry ,Laser treatment ,Dentistry ,Pharmacy ,Laser assisted ,Laser ,Pain rating ,law.invention ,Dental patients ,Laser technology ,Laser therapy ,law ,Medicine ,Medical physics ,business - Abstract
Objectives: To evaluate the dental anxiety level and the degree of acceptance of laser assisted pedodontic treatments from the children part. Also, we want to underline the advantages of laser use in pediatric dentistry, to make this technology widely used in treating dental problems of our children patients. Methods: Thirty pediatric dental patients presented in the Department of Pedodontics, University of Medicine and Pharmacy „Victor Babes”, Timisoara were evaluated using the Wong-Baker pain rating scale, wich was administered postoperatory to all patients, to assess their level of laser therapy acceptance. Results: Wong-Baker faces pain rating scale (WBFPS) has good validity and high specificity; generally it’s easy for children to use, easy to compare and has good feasibility. Laser treatment has been accepted and tolerated by pediatric patients for its ability to reduce or eliminate pain. Around 70% of the total sample showed an excellent acceptance of laser dental treatment. Conclusions: Laser technology is useful and effective in many clinical situations encountered in pediatric dentistry and a good level of pacient acceptance is reported during all laser procedures on hard and soft tissues.
- Published
- 2016
- Full Text
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35. Progress of the array laser detonation technology
- Author
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Peng Ren, Rui Zhang, Hao-yu Wang, and Ai-feng He
- Subjects
Materials science ,business.industry ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Electrical engineering ,Detonation ,Laser array ,Laser ,law.invention ,Laser technology ,law ,Miniaturization ,ComputingMethodologies_GENERAL ,Intellectualization ,business - Abstract
This paper stated the main characteristics of the array laser technology, introduced high application and development at home and abroad, especially having a comparison of solid array laser technology with semiconductor array laser technology on fast initiation and fire energy, etc. by researchment of the array laser technology, this paper forsaw the prospect of the array laser. at last, this paper summaries plenty of advantages of the laser array technology on miniaturization, intellectualization, integration.
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- 2016
- Full Text
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36. The laser propagation demonstration: a STEM-based outreach project
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Mark F. Spencer, Michael J. Steinbock, Michael A. Marciniak, and Milo W. Hyde
- Subjects
Laser technology ,Cultural heritage ,Outreach ,Engineering management ,Physics education ,Health technology ,Simulation ,Public awareness ,Mathematics - Abstract
Investment in laser technology has led to significant advances in remote sensing, astronomy, industrial processing, and medical technology. To celebrate this rich heritage and promote public awareness in optics and photonics, the SPIE Student Chapter at the Air Force Institute of Technology (AFIT) developed the Laser Propagation Demonstration (LPD). This interactive demonstration serves as one of AFIT’s legacy outreach projects for events involving education in science, technology, engineering, and mathematics (STEM). Initially developed with funding from a LaserFest grant awarded by SPIE in 2010, the goal was to develop a simple hands-on demonstration to highlight the optical effects of diffraction, refraction, and attenuation on laser propagation. Since then, the LPD has undergone several upgrades (thanks to the continued support from a 2012 SPIE Education Outreach Grant) to better highlight these optical phenomena and make it more engaging for a wider range of audiences. This paper celebrates the continued success of the LPD and shares the knowledge gained with an overview of its design and use in STEM-based outreach events.
- Published
- 2014
- Full Text
- View/download PDF
37. Plasmonic enhanced pulsed laser induced optoporation and transfection of cells (presentation video)
- Author
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Michel Meunier
- Subjects
Laser technology ,Pulsed laser ,Nanostructure ,law ,Nanotechnology ,Transfection ,Laser ,Ultrashort pulse ,Plasmon ,Laser beams ,law.invention - Abstract
A new technique is introduced to perform optoporation and transfection of living cells using a laser and nanotechnology. Irradiating plasmonics nanostructures by an ultrafast laser beam produces highly localised processes on the nanoscale in the biological surrounding medium, yielding to the optoporation of the cell membrane.. These nanoparticles could be functionalised to target specific biological entities, thus performing multiple targeted processes on the nanoscale. . We are able to perform gene transfection in living cell with an optoporation efficiency as high as 70%. Complete physical model was developed to determine the basic mechanism underlying this new process. Our laser technology shows promises as an innovative tool for fundamental research in biology and medicine as well as an efficient alternative nanosurgery technology that could be adapted to therapeutic tools in the clinic.
- Published
- 2014
- Full Text
- View/download PDF
38. Development of optical sciences in Poland
- Author
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Ryszard S. Romaniuk
- Subjects
Physics ,Optical fiber ,business.industry ,Photonic integrated circuit ,law.invention ,Laser technology ,Optics ,law ,Optical materials ,Integrated optics ,Photonics ,Optical metrology ,business ,Telecommunications - Abstract
Research and technical communities for optics, photonics and optoelectronics is grouped in this country in several organizations and institutions. These are: Photonics Society of Poland (PSP), Polish Committee of Optoelectronics of SEP, Photonics Section of KEiT PAN, Laser Club at WAT, and Optics Section of PTF. Each of these communities keeps slightly different specificity. PSP publishes a quarterly journal Photonics Letters of Poland, stimulates international cooperation, and organizes conferences during Industrial Fairs on Innovativeness. PKOpto SEP organizes didactic diploma competitions in optoelectronics. KEiT PAN takes patronage over national conferences in laser technology, optical fiber technology and communications, and photonics applications. SO-PTF has recently taken a decision to organize a cyclic event “Polish Optical Conference”. The third edition of this conference PKO’2013 was held in Sandomierz on 30.06-04.07.2013. The conference scientific and technical topics include: quantum and nonlinear optics, photon physics, optic and technology of lasers and other sources of coherent radiation, optoelectronics, optical integrated circuits, optical fibers, medical optics, instrumental optics, optical spectroscopy, optical metrology, new optical materials, applications of optics, teaching in optics. This paper reviews chosen works presented during the III Polish Optical Conference (PKO’2013), representing the research efforts at different national institutions.
- Published
- 2013
- Full Text
- View/download PDF
39. Lasers and applications in parts cleaning and surface pre-treatment
- Author
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Jörn Birkel, Till Schneider, Birgit Faißt, Sascha Weiler, Oliver H. Heckl, Severin Luzius, and Thomas Burdel
- Subjects
Pre treatment ,Materials science ,business.industry ,Automotive industry ,Process (computing) ,Welding ,Laser ,law.invention ,Corrosion ,Laser technology ,Selective laser sintering ,law ,Process engineering ,business - Abstract
A number of upcoming industrial applications prove that the laser offers great possibilities for parts cleaning and surface pretreatment. Thereby laser technology enables solutions to reduce production costs and to increase productivity and quality in the manufacturing process. Examples are the removal of oil, grease, phosphate layers or corrosion with the laser. This paper will focus on parts cleaning and surface pretreatment applications within the automotive industry. For a range of examples it will be shown that the laser not only offers advantages to carry out the described production step (such as cleaning or the creation of functional textures) but also offers great advantages for a following production step within the chain, such as a welding or gluing process. It will be demonstrated that several ns and ps laser sources and systems can be selected, depending on the application.
- Published
- 2013
- Full Text
- View/download PDF
40. Laser technology 2012
- Author
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Ryszard S. Romaniuk and Jerzy Gajda
- Subjects
Materials science ,Optical fiber ,business.industry ,Optical engineering ,Laser ,Semiconductor laser theory ,law.invention ,Biophotonics ,Laser technology ,Optical fiber amplifiers ,law ,Electronic engineering ,Photonics ,business ,Telecommunications - Abstract
Laser technology research community in this country and in this region is concentrated mainly at universities. A periodic symposium gathers this community and invited guests from this geographical region to summarize the current achievements. The 2012 Symposium summarized research and technical achievements done during the period of 2010- 2012. The main developments are focused in such areas like: semiconductor lasers, optical fiber amplifiers and lasers, and applications in optical fiber communications, optical fiber sensory networks, medicine, environment monitoring and protection, as well as safety and security.
- Published
- 2013
- Full Text
- View/download PDF
41. Laser technology and applications 2012: a preview
- Author
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Jerzy Gajda and Ryszard S. Romaniuk
- Subjects
Laser technology ,Engineering ,business.industry ,law ,Electrical engineering ,ComputingMethodologies_GENERAL ,business ,Laser ,Telecommunications ,law.invention - Abstract
The research and technical achievements in the area of lasers are summarized every three years by the National Symposium on Laser Technology held in the Baltic See Resort Świnoujście near Szczecin, Poland. The paper presents a preview of the symposium works to be shown and debated during this key event in September 2012. There are shown development tendencies of laser materials and technologies and laser associated branches of optoelectronics in this country, including the efforts of academia, governmental institutes, research businesses and industry. The second branch of the symposium works are laser applications, where the laser systems operators and laser users present their achievements. Topical tracks of the meeting are presented, as well as the keynote and invited subjects delivered by key representatives of the laser industry.
- Published
- 2012
- Full Text
- View/download PDF
42. Thermo-optical (TOP) analysis by coupling FEM and ray tracing
- Author
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Johannes Wasselowski, Peter Loosen, and Alexander Gatej
- Subjects
Laser technology ,Co2 laser ,Optics ,Materials science ,law ,business.industry ,Data approximation ,Thermal ,Ray tracing (graphics) ,Laser ,business ,Finite element method ,law.invention - Abstract
Thermo-optical simulation is a compulsory improvement of classical ray tracing, since many branches of optical and laser technology have to deal with thermal gradients. This paper discusses an approach for coupling FEM and ray tracing simulation tools by processing FE data using scattered data approximation techniques. The implemented interface for two space dimensions is being validated by comparing approximated data to measured values from a CO2 laser application of up to 1.75 kW. Finally, the benefits and further developments of analyzing thermal gradients in optical simulation are being discussed.
- Published
- 2012
- Full Text
- View/download PDF
43. Laser holographic precise micropressure measuring system
- Author
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Yun-Zhi Wang
- Subjects
Laser technology ,Optics ,Materials science ,business.industry ,law ,Laser holography ,Stability (learning theory) ,Holography ,business ,Laser ,Pressure sensor ,law.invention - Abstract
To take a large and high-grade hologram, have been numerous scientific workers' interested topics. Since the stability of the holographic plate, objective table's stability, object's stability, optical elements' stabilities, etc, aren't easily supervised and controlled precisely, the laser holographic technique has progressed at a slow pace. Precise micropressure measuring system, an application of laser technology, is introduced as a method for monitoring holographic plates' stability. This system firstly brings the pressure sensor into the laser holographic experiments, and uses the soft Kingview to design the programs for controlling the pressure sensor, so that the system can real-time monitoring and real-time adjusting the laser holographic plates' stability. Being verified by experiments, this experiment has achieved good results, for example, making a larger hologram, saving the time taken from the original 1-2 days to present of 0.5-1.5 hours, that is to say those above-mentioned measures raise the success rate of making large holograms to some extent.
- Published
- 2011
- Full Text
- View/download PDF
44. Laser neutralization of buried munitions
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Matthew D. Nixon, Russell McElhaney, Bradley W. Schilling, Joe Alexander, James D. Habersat, and T. M. Lehecka
- Subjects
Laser technology ,Drill ,law ,Initial phase ,Nuclear engineering ,Environmental science ,Breadboard ,Laser ,Laboratory testing ,Simulation ,law.invention - Abstract
This report describes the results of the first phase of a planned two-phase program to develop laser technology for rapid neutralization of buried munitions from a safe standoff distance. The primary objective of this first phase is to demonstrate, via laboratory experiments, the capabilities of a breadboard laser system to "drill" through a minimum depth of 15 cm of earthen materials to defeat a buried mine at a standoff distance greater than 20 m. In the initial phase covered by this report, results of short range laboratory testing by 3 contractors are reported. The planned second phase of this program will consist of procuring a more capable 10 kW SM laser and performing field-testing at longer standoff ranges.
- Published
- 2011
- Full Text
- View/download PDF
45. Near-infrared laser treatment of complicated hemangiomas in children: ten-year clinical experience
- Author
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Alexander V. Lappa, Valeriy A. Privalov, and Ivan A. Abushkin
- Subjects
medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Near infrared laser ,Interstitial irradiation ,medicine.disease ,Anus ,Perineum ,Hemangioma ,Laser technology ,medicine.anatomical_structure ,medicine ,Radiology ,business ,Laser coagulation ,Nose - Abstract
Results of application of low invasive laser technology (developed by authors: Proc. SPIE 5863, 107-115 (2005), Russian Federation patent No.2290228 of.27.12.06) to treatment of hemangiomas in children are presented and analyzed in this work. From 2001 the technology was applied to about 1500 children with more than 2000 hemangiomas. Majority of them were complicated ones: belong to cavernous or combined types or (and) were localized on problem places: on face near eyes, nose, and lips, on auricles, on perineum near anus and genitals, in respiratory and gastrointestinal tracts. Diode laser with wavelength 920, 970, and 1060 nm at distant and interstitial irradiation were applied. In case of need there applied endoscopes. Excellent and good results have been achieved in 94% cases; there was a significant improvement in the rest cases.
- Published
- 2011
- Full Text
- View/download PDF
46. Technology needs for corneal transplant surgery
- Author
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Sonia H. Yoo and Pravin K Vaddavalli
- Subjects
medicine.medical_specialty ,genetic structures ,business.industry ,medicine.medical_treatment ,Corneal Transplant ,Lamellar keratoplasty ,Eye banking ,eye diseases ,Surgery ,Laser technology ,surgical procedures, operative ,medicine.anatomical_structure ,Cornea ,Imaging technology ,Medicine ,Graft survival ,sense organs ,business ,Corneal transplantation - Abstract
Corneal transplant surgery has undergone numerous modifications over the years with improvements in technique, instrumentation and eye banking. The main goals of corneal transplantation are achieving excellent optical clarity with long-term graft survival. Penetrating, anterior and posterior lamellar surgery along with femtosecond laser technology have partially met these goals, but outcomes are often unpredictable and surgeon dependent. Technology to predictably separate stroma from Descemet's membrane, techniques to minimize endothelial cell loss, improvements in imaging technology and emerging techniques like laser welding that might replace suturing, eventually making corneal transplantation a refractively predictable procedure are on the wish list of the cornea surgeon.
- Published
- 2011
- Full Text
- View/download PDF
47. Source technology as the foundation for modern infra-red counter measures (IRCM)
- Author
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Robert J. Grasso
- Subjects
OPOS ,Engineering ,business.industry ,Solid-state ,Survivability ,Counter measures ,law.invention ,Semiconductor laser theory ,Laser technology ,law ,Evolving systems ,business ,Quantum cascade laser ,Telecommunications - Abstract
Protection of military aircraft from IR guided threats is paramount to ensure the survivability of aircrews, platforms, and to ensure mission success. At the foundation of all IRCM systems is the source; that component that provides the in-band radiant energy required for threat defeat. As such, source technology has evolved with IRCM technology to encompass the evolving systems architectures that encompass IRCM: 1) "Hot Brick" omni-directional sources; 2) arc lamps, and; 3) lasers. Lasers, as IRCM sources continue to evolve to meet the challenges of ever-evolving threats, superior techniques, economy of installation, and superior source technology. Lasers represent the single greatest advance in IRCM source technology and continue to evolve to meet ever more sophisticated threats. And have been used with great effect in all modern IRCM systems; evolving from frequency doubled CO2 lasers, to solid state lasers with OPOs, to semiconductor lasers including Quantum Cascade Lasers (QCLs); these last devices represent the latest advance in IRCM source technology offering all-band coverage, architectural simplicity, and economy of scale. While QCLs represent the latest advance in IRCM laser technology, fiber lasers show much promise in addressing multi-band operation as well as the ability to be coherently combined to achieve even greater output capability. Also, ultra-short pulse lasers are evolving to become practical for IRCM applications. Stay tuned ......
- Published
- 2010
- Full Text
- View/download PDF
48. National funding initiatives for laser technology in Germany: projects on brilliant laser sources and their applications
- Author
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Friedrich Bachmann
- Subjects
Engineering ,Materials processing ,business.industry ,Launched ,Electrical engineering ,Laser ,law.invention ,Semiconductor laser theory ,Laser technology ,law ,Fiber laser ,Disk laser ,business ,Telecommunications ,Laser beams - Abstract
Germany's leading role in laser technology is not least a consequence of successful national precompetitive joint development projects between industry and science: Funding of laser technology in Germany is strongly performed by the German Federal Ministry of Education and Research (BMBF) and has already been started in the second half of the eighties of last century. Since then several programs matched to the actual technological status and the future requirements of the market have been run: whilst activities have been focused on gas lasers in the beginning, today - in the actual research funding program "optical technologies" - semiconductor lasers and diode pumped lasers are in the center of interest. More than ever before relevance of the development to applications must be integrated into the projects. Consequently, in most projects lasers source development and application of novel brilliant laser sources are combined. This has been successfully performed in the BRIOLAS (Brilliant Diode Lasers) initiative, which has been launched in 2004 and will come to an end in 2010. Based on the knowledge and experience gained in the 13 projects of the BRIOLAS initiative, two new initiatives have been launched in 2008, namely INLAS (Integrated Optical Components for High Power Laser Beam Sources) and MABRILAS (Material Processing with Brilliant Laser Beam Sources).
- Published
- 2010
- Full Text
- View/download PDF
49. The application study on laser scanning tridimensional modeling of human body
- Author
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Guilan Ma, Ling Guo, Li Yuxiang, Jianquan Yao, and Tao Wang
- Subjects
Laser technology ,Engineering ,Software ,Ccd camera ,Laser scanning ,business.industry ,Feature (computer vision) ,Coordinate system ,Photography ,Human body modeling ,Computer vision ,Artificial intelligence ,business - Abstract
A novel three-dimensional human body modeling method on laser technology, using the CCD camera to receive the scanning information, based on the theory of aerial photography surveying and 36 characteristic measuring points, is reported here. We introduce the mode integration of human body and the principle of human body feature identifying. The laser scanning human body three-dimensional modeling system is established.
- Published
- 2009
- Full Text
- View/download PDF
50. The Townes Laser Institute
- Author
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Martin Richardson
- Subjects
Laser technology ,Engineering management ,Engineering ,law ,business.industry ,Center of excellence ,Electrical engineering ,Advanced manufacturing ,Laser ,business ,law.invention - Abstract
The State of Florida has recently established a new center of excellence in advanced core laser technologies, associated with the College of Optics & Photonics. This center, dedicated in 2007 in tribute to the pioneering work of Charles Townes, whose insight lead to the development of the maser and the laser, will invest in next generation laser technologies for applications to medicine, advanced manufacturing and defense. It joins the cluster of photonics-related centers at UCF, adding a focused national center for the education and training of scientists and engineers in laser technology. This paper describes the mission and objectives of the Townes Institute, the educational and training programs it is creating, its current investments and opportunities, and the future institutional and industrial partnerships and global reach it hopes to create.
- Published
- 2009
- Full Text
- View/download PDF
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