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384 results on '"Kochanowicz, Marcin"'

1. Pr3+-doped YPO4 nanocrystal embedded into an optical fiber

Author

Dorosz, Dominik, Kochanowicz, Marcin, Valiente, Rafael, Diego-Rucabado, Andrea, Rodríguez, Fernando, Siñeriz-Niembro, Nuria, Espeso, José I., Lesniak, Magdalena, Miluski, Piotr, Conzendorf, Sylvia, Posseckardt, Juliane, Liao, Zhongquan, Jimenez, Gloria Lesly, Müller, Robert, Lorenz, Martin, Schwuchow, Anka, Leich, Martin, Lorenz, Adrian, Wondraczek, Katrin, and Jäger, Matthias

Published
2024
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22. YPO4:Pr3+ nanocrystal embedded into an optical fiber

Author

Dorosz, Dominik, primary, Kochanowicz, Marcin, additional, Valiente, Rafael, additional, Diego-Rucabado, Andrea, additional, Rodríguez, Fernando, additional, Siñeriz-Niembro, Nuria, additional, Espeso, José I., additional, Lesniak, Magdalena, additional, Miluski, Piotr, additional, Conzendorf, Sylvia, additional, Posseckardt, Juliane, additional, Liao, Zhongquan, additional, Jimenez, Gloria Lesly, additional, Müller, Robert, additional, Lorenz, Martin, additional, Schwuchow, Anka, additional, Leich, Martin, additional, Lorenz, Adrian, additional, Wondraczek, Katrin, additional, and Jäger, Matthias, additional

Published
2024
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35. Broadband 1.5-2.1 µm emission in gallo-germanate dual-core optical fiber co-doped with Er3+ and Yb3+/Tm3+/Ho3+

Author

Markiewicz, Jakub, primary, Kochanowicz, Marcin, additional, Ragin, Tomasz, additional, Sadowska, Karolina, additional, Zmojda, Jacek, additional, Miluski, Piotr, additional, Dorosz, Jan, additional, Kuwik, Marta, additional, Pisarski, Wojciech, additional, Pisarska, Joanna, additional, Lesniak, Magdalena, additional, and Dorosz, Dominik, additional

Published
2023
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40. Pr3+-doped YPO4 nanocrystal embedded into an optical fiber.

Author

Dorosz, Dominik, Kochanowicz, Marcin, Valiente, Rafael, Diego-Rucabado, Andrea, Rodríguez, Fernando, Siñeriz-Niembro, Nuria, Espeso, José I., Lesniak, Magdalena, Miluski, Piotr, Conzendorf, Sylvia, Posseckardt, Juliane, Liao, Zhongquan, Jimenez, Gloria Lesly, Müller, Robert, Lorenz, Martin, Schwuchow, Anka, Leich, Martin, Lorenz, Adrian, Wondraczek, Katrin, and Jäger, Matthias

Subjects
*POWDERED glass, *DOPING agents (Chemistry), *GLASS-ceramics, *OPTICAL properties, *REFRACTIVE index, *OPTICAL fibers, *NANOCRYSTALS
Abstract

Optical fiber with YPO4:Pr3+ nanocrystals (NCs) is presented for the first time using the glass powder—NCs doping method. The method's advantage is separate preparation of NCs and glass to preserve luminescent and optical properties of NCs once they are incorporated into optical fiber. The YPO4:Pr3+ nanocrystals were synthesized by the co-precipitation and hydrothermal methods, optimized for size (< 100 nm), shape, Pr3+ ions concentration (0.2 mol%), and emission lifetime. The core glass was selected from the non-silica P2O5-containing system with refractive index (n = 1.788) close to the NCs (no = 1.657, ne = 1.838). Optical fiber was drawn by modified powder-in-tube method after pre-sintering of glass powder—YPO4:Pr3+ (wt 3%) mixture to form optical fiber preform. Luminescent properties of YPO4:Pr3+ and optical fiber showed their excellent agreement, including sharp Pr3+ emission at 600 nm (1D2–3H4) and 1D2 level lifetime (τ = 156 ± 5 µs) under 488 nm excitation. The distribution of the YPO4:Pr3+ NCs in optical fiber were analyzed by TEM-EDS in the core region (FIB-SEM-prepared). The successful usage of glass powder—NCs doping method was discussed in the aspect of promising properties of the first YPO4:Pr3+ doped optical fiber as a new way to develop active materials for lasing applications, among others. [ABSTRACT FROM AUTHOR]

Published
2024
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41. EFFICIENT GREEN UPCONVERSION EMISSION IN TRANSPARENT TEO2-GEO2 GLASS-CERAMIC OBTAINED BY BILLET EXTRUSION.

Author

Lesniak, Magdalena, Jiménez, Lesly G., Starzyk, Bartłomiej, Szymczak, Patryk, Vázquez-López, Carlos, Kochanowicz, Marcin, Kuwik, Marta, Pisarska, Joanna, Pisarski, Wojciech A., and Dorosz, Dominik

Subjects
GLASS-ceramics, PHOTON upconversion, TRANSMISSION electron microscopes, GLASS transitions, X-ray diffraction
Abstract

Transparent Yb3+/Er3+ glass-ceramic was successfully obtained by the extrusion method. The extrusion of oxyfluoride tellurite-germanate glass co-doped with Yb3+ and Er3+ ions at 520 ℃ resulted in the formation of Ba0.75Er0.25F2.25 nanocrystals, leading to an increase in the upconversion (UC) emission intensity of 35 times in glass-ceramic with respect to the glass. The glass to glass-ceramic transition was confirmed by X-ray diffraction (XRD) and Transmission electron microscope (TEM). Also, the structural changes that occurred during crystallization were assessed using Fourier-transform infrared (FTIR) spectroscopy. Furthermore, the pump power and temperature UC emission dependence of glass and glass-ceramic under 976 nm laser excitation were investigated in detail. The assessments showed that i) two-phonons are involved in the UC process and ii) the temperature has a significant influence over it. The Yb3+/Er3+ codoped glass-ceramic shows relatively high Sa and Sr values in a wide temperature range from 300 to 573 K, presenting the maximal Sa value of 3.50 × 10-3 at 573 K and the maximal Sr value of 6.30 × 10-3 at 364 K. These results suggest that the glass-ceramic is a good candidate for optical applications such as luminescent thermometry. [ABSTRACT FROM AUTHOR]

Published
2024
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42. Optical Fibre Doped with YPO4:Pr3+ Nanocrystals - Glass Powder Doping Technique for New Laser Transitions

Author

Dorosz, Dominik, primary, Kochanowicz, Marcin, additional, Valiente, Rafael, additional, Diego-Rucabado, Andrea, additional, Siñeriz-Niembro, Nuria, additional, Lesniak, Magdalena, additional, Posseckardt, Juliane, additional, Jimenez, Gloria Lesly, additional, Müller, Robert, additional, Lorenz, Martin, additional, Schwuchow, Anka, additional, Leich, Martin, additional, Wondraczek, Katrin, additional, and Jäger, Matthias, additional

Published
2023
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43. Color-tunable upconversion luminescence of Er3+ in oxyfluoride nano-glass-ceramics

Author

Balda, Rolindes, Velázquez, J. J., Kochanowicz, Marcin, Dorosz, Dominik, Durán, Alicia, Pascual, M. Jesús, Fernández, Joaquín, Balda, Rolindes, Velázquez, J. J., Kochanowicz, Marcin, Dorosz, Dominik, Durán, Alicia, Pascual, M. Jesús, and Fernández, Joaquín

Abstract

Tuning color output and enhancing upconversion emission of Er3+ ions in transparent sodium lutetium fluoride glassceramics in bulk and optical fibers, by adjusting the Yb3+ doping level and the excitation power, has been demonstrated. The addition of Yb3+ enhances the UC emission and tunes the color from green to yellow due to an increase of the red-to-green intensity ratio. Moreover, the relative emission intensities of blue, green, and red emissions can be changed by controlling the excitation power which tunes the color from yellow to green.

Published
2023

45. Tm3+ Doped Multi-Ring Profile Single-Mode Fiber Laser for Application in the Eye-Safe Spectral Range

Author

Miluski, Piotr, Michalska, Maria, Kochanowicz, Marcin, Markowski, Krzysztof, Lodzinski, Marek, Pisarski, Wojciech A., Pisarska, Joanna, Kuwik, Marta, Lesniak, Magdalena, Zmojda, Jacek, Dorosz, Dominik, Swiderski, Jacek, and Dorosz, Jan

Abstract

New construction of a silica-based multi-ring profile of Tm3+ doped fiber laser is presented. Optimisation of both multi-ring refractive index profile and active ions distribution towards high beam quality mode propagation is a new approach in developing active fiber constructions. Using a system of layers forming the core allows controlling the dopant profile and, consequently, the emission properties of fiber lasers (power density, beam profile shape etc.). The preform fabricated using MCVD technology is presented. The refractive index profile (Δn = 9·10−3), EPMA-EDS analysis (Tm2O3 and Al2O3 concentration 0.56 and 5.2 wt% respectively), and excited state (3F4) decay time are shown. The double-clad fiber laser based on the Fabry-Perot resonator construction (17/240 μm core/cladding) was used for single-mode laser beam generation at a wavelength of 1938.8 nm (exc. @ 790 nm) with an FWHM bandwidth of 0.17 nm (1.68 W output power, M2x = 1.10, M2y = 1.23). For the optimized gain fiber (25/330 μm core/cladding diameters) length, the laser provided an output power of >5 W with a slope efficiency of ∼26%, determined to the absorbed pump power.

Published
2024
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47. Broadband Profiled Eye-Safe Emission of LMA Silica Fiber Doped with Tm 3+ /Ho 3+ Ions.

Author

Miluski, Piotr, Markowski, Krzysztof, Kochanowicz, Marcin, Łodziński, Marek, Pisarski, Wojciech A., Pisarska, Joanna, Kuwik, Marta, Leśniak, Magdalena, Dorosz, Dominik, Żmojda, Jacek, Ragiń, Tomasz, and Dorosz, Jan

Subjects
RARE earth oxides, OPTICAL fibers, POWER density, REFRACTIVE index, RADIATION sources, SILICA fibers
Abstract

LMA (Large Mode Area) optical fibers are presently under active investigation to explore their potential for generating laser action or broadband emission directly within the optical fiber structure. Additionally, a wide mode profile significantly reduces the power distribution density in the fiber cross-section, minimizing the power density, photodegradation, or thermal damage. Multi-stage deposition in the MCVD-CDT system was used to obtain the structural doping profile of the LMA fiber multi-ring core doped with Tm3+ and Tm3+/Ho3+ layer profiles. The low alumina content (Al2O3: 0.03wt%) results in low refractive index modification. The maximum concentrations of the lanthanide oxides were Tm2O3: 0.18wt % and Ho2O3: 0.15wt%. The double-clad construction of optical fiber with emission spectra in the eye-safe spectral range of (1.55–2.10 µm). The calculated LP01 Mode Field Diameter (MFD) was 69.7 µm (@ 2000 nm, and 1/e of maximum intensity), which confirms LMA fundamental mode guiding conditions. The FWHM and λmax vs. fiber length are presented and analyzed as a luminescence profile modification. The proposed structured optical fiber with a ring core can be used in new broadband optical radiation source designs. [ABSTRACT FROM AUTHOR]

Published
2023
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48. Tm3+/Ho3+ profiled co-doped core area optical fiber for emission in the range of 1.6–2.1 µm.

Author

Miluski, Piotr, Markowski, Krzysztof, Kochanowicz, Marcin, Łodziński, Marek, Żmojda, Jacek, Pisarski, Wojciech A., Pisarska, Joanna, Kuwik, Marta, Leśniak, Magdalena, Dorosz, Dominik, Ragiń, Tomasz, Askirka, Valiantsin, and Dorosz, Jan

Subjects
OPTICAL fiber cladding, OPTICAL fibers, DOPING agents (Chemistry), NUMERICAL apertures, CHEMICAL vapor deposition, HOLMIUM, THULIUM, MOLECULAR spectra
Abstract

Double-clad optical fiber with a multi-ring core profile doped with thulium and holmium fabricated by Modified Chemical Vapor Deposition Chelate Doping Technology (MCVD-CDT) is presented. The measured Tm2O3 and Ho2O3 complexes' weight concentrations were 0.5% and 0.2% respectively. Numerical analyses show weakly guiding conditions and 42.2 µm of MFD LP01 at 2000 nm. The low NA numerical aperture (NA = 0.054) was obtained for the 20/250 µm core/cladding ratio optical fiber construction. The emission spectra in the range of 1.6–2.1 µm vs. the fiber length are presented. The full width at half maximum (FWHM) decreases from 318 to 270 nm for fiber lengths from 2 to 10 m. The presented fiber design is of interest for the development of new construction of optical fibers operating in the eye-safe spectral range. [ABSTRACT FROM AUTHOR]

Published
2023
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