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12 results on '"Richard, Moncorge"'

1. InGaN-LD-Pumped Continuous-Wave Deep Red Laser at 670 nm in Pr3+:LiYF4 Crystal

Author

Patrice Camy, Richard Moncorge, Zhiping Cai, Huiying Xu, Bin Xu, Saiyu Luo, Biao Qu, Yongjie Cheng, and Jean-Louis Doualan

Subjects
Materials science, Active laser medium, business.industry, Far-infrared laser, Slope efficiency, Laser pumping, Laser, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, Laser linewidth, Optics, law, Diode-pumped solid-state laser, Optoelectronics, Laser power scaling, Electrical and Electronic Engineering, business
Abstract

We report the first laser operation at π-polarized 670.34-nm deep red laser in a 2-W InGaN-LD-pumped Pr 3+ :LiYF 4 (Pr:YLF) crystal with the aid of a 0.1-mm intracavity etalon, to the best of our knowledge. The maximum output power of this laser emission was up to 87.6 mW with slope efficiency of ~11.9$ % with respect to the absorbed pump power. The beam propagation factors in x-direction and y-direction were measured to be 1.49 and 1.05, respectively.

Published
2015

2. Record laser wavelength tunability of Pr:LiYF4 around 900nm

Author

Jean-Louis Doualan, Bin Xu, Zhiping Cai, Richard Moncorge, Biao Qu, Alain Braud, Huying Xu, and Patrice Camy

Subjects
Materials science, business.industry, Far-infrared laser, Laser pumping, Laser, law.invention, X-ray laser, Resonator, Optics, law, Diode-pumped solid-state laser, Optoelectronics, Laser power scaling, business, Tunable laser
Abstract

CW laser wavelength tunability of 70 nm is demonstrated in the 900nm spectral range by pumping a Pr:LiYF4 single crystal with an OPSL laser and by using a V-shape resonator and a quartz birefringent plate.

Published
2015

3. Fluoride Planar Waveguide Lasers

Author

Abdel Benayad, Western Bolaños, Florent Starecki, Patrice Camy, Gurvan Brasse, Jean-Louis Doualan, Richard Moncorge, and Alain Braud

Subjects
Waveguide lasers, Materials science, business.industry, Physics::Optics, Laser, Epitaxy, Optical quality, law.invention, Characterization (materials science), Condensed Matter::Materials Science, chemistry.chemical_compound, Optics, Planar, chemistry, law, Optoelectronics, business, Fluoride, Waveguide
Abstract

High optical quality rare-earth-doped YLiF4 layers were grown by the liquid phase epitaxy technic. Optical characterization, CW and Q-switch laser operation obtained with these fluorides waveguides will be presented and discussed in this communication. Article not available.

Published
2013

4. Segregation and twinning in the rare-earth doped KPb2Cl 5 laser crystals

Author

Patrick Mounaix, Richard Moncorge, Alban Ferrier, Olivier Perez, Matias Velázquez, Jean-Francis Marucco, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), Laboratoire d'étude des matériaux hors équilibre (LEMHE), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Centre de physique moléculaire optique et hertzienne (CPMOH), Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1, Laboratoire de cristallographie et sciences des matériaux (CRISMAT), École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Institut de Chimie du CNRS (INC), Centre Interdisciplinaire de Recherche Ions Lasers (CIRIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Centre National de la Recherche Scientifique (CNRS), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010302 applied physics, Chemistry, Rare earth, Doping, Laser, 02 engineering and technology, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Thermal expansion, law.invention, Crystal, Crystallography, law, Lattice (order), 0103 physical sciences, General Materials Science, Solubility, 0210 nano-technology, Crystal twinning
Abstract

International audience; We present the Er3+:KPb2Cl5 lattice parameters thermal expansion and twinning characterization, pure KPb 2Cl5 crystals room temperature static dielectric constant measurements, and equilibrium segregation coefficients determination of Er 3+,Ho3+, and Pr3+ defects in KPb 2Cl5. The two main current limitations which still hinder the development of this crystal as a laser material, namely, the Er3+ cations segregation and low solubility limit as well as the crystal twinning, are discussed.

Published
2009

5. Latest Developments of Bulk Crystals and Thin Films of Rare-Earth Doped CaF2 for Laser Applications

Author

Richard Moncorge, Jean-Louis Doualan, Emmanuelle Daran, B. Ferrand, M. Couchaud, and Patrice Camy

Subjects
Infrared, Chemistry, Bridgman method, Organic Chemistry, Rare earth, Doping, Analytical chemistry, Physics::Optics, Mineralogy, General Medicine, Laser, Biochemistry, Ion, law.invention, Inorganic Chemistry, Crystal, Condensed Matter::Materials Science, law, Condensed Matter::Superconductivity, Environmental Chemistry, Physical and Theoretical Chemistry, Thin film, Luminescence, Bulk crystal
Abstract

Several CaF2 single crystals doped with trivalent rare-earth ions have been grown in the recent years in the form of bulk crystals by using the Bridgman method and in the form of thin films by using the MBE and LPE techniques. The spectroscopic, gain and laser properties of these crystals doped with Pr3+, on the one hand, and with Yb3+, Tm3+ or Er3+ ions, on the other hand, have been studied and are reviewed here for their laser potentials in the red and in the infrared spectral domains, respectively.

Published
2007

6. Mid-infrared fiber laser application: Er3+-doped chalcogenide glasses

Author

Jean-Louis Doualan, Guillaume Canat, Patrick Houizot, Richard Moncorge, Virginie Nazabal, Frédéric Smektala, Virginie Moizan, Jean-Luc Adam, Johann Troles, Jean-Pierre Cariou, Institut des Sciences Chimiques de Rennes ( ISCR ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Ecole Nationale Supérieure de Chimie de Rennes-Institut National des Sciences Appliquées ( INSA ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Centre de recherche sur les Ions, les MAtériaux et la Photonique ( CIMAP - UMR 6252 ), Université de Caen Normandie ( UNICAEN ), Normandie Université ( NU ) -Normandie Université ( NU ) -Ecole Nationale Supérieure d'Ingénieurs de Caen ( ENSICAEN ), Normandie Université ( NU ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Centre National de la Recherche Scientifique ( CNRS ), ONERA - The French Aerospace Lab ( Chatillon ), ONERA, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), ONERA - The French Aerospace Lab [Châtillon], ONERA-Université Paris Saclay (COmUE), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), and Normandie Université (NU)

Subjects
Materials science, Chalcogenide, Infrared, Analytical chemistry, Chalcogenide glass, 02 engineering and technology, 01 natural sciences, 7. Clean energy, law.invention, 010309 optics, chemistry.chemical_compound, law, Fiber laser, 0103 physical sciences, Radiative transfer, Emission spectrum, Absorption (electromagnetic radiation), business.industry, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Laser, chemistry, [ CHIM.MATE ] Chemical Sciences/Material chemistry, Optoelectronics, 0210 nano-technology, business
Abstract

International audience; Mid-infrared (IR) lasers are of interest for a variety of applications including environmental sensing, LIDAR and military counter measures. However, this wavelength range lacks powerful, coherent, robust and compact sources. A solution can lie in chalcogenide glasses as host materials for rare earth ions. With an extended infrared transparency, low phonon energy limiting the non radiative multiphonon relaxation rates and suitable rare earth solubility, sulfide glasses based on Ge-Ga-Sb-S system make available radiative transitions in the mid-IR range. The glasses with nominal composition of Ge20Ga5Sb10S65 doped with Er3+ (500 to 10000 ppm) were prepared by means of conventional melting and quenching method. The Er3+, widely studied in glass fibers for near-IR amplification, was initially selected for the transition 4I9/2 to 4I11/2 emitting at around 4.5 μm in order to demonstrate the ability of this sulfide composition for midinfrared fiber lasers application. In these objectives, absorption and emission spectra have been recorded and the radiative decay lifetime of excited levels (4I9/2, 4I11/2 and 4I13/2) has been determined. These last experimental results were compared with those obtained by Judd-Ofelt model from absorption cross-sections of all observable transitions. Therefore, the 4I9/2 radiative quantum efficiency was estimated at 67 %. The emission cross-section was 2.6x10-21 cm2 at 4.6 μm obtained by Fütchbauer-Ladenburg theory. The product of measured lifetime and emission cross-section for 4I9/2 -> 4I11/2 transition is about 1.87x10-24 cm2.s is comparable with that for GaLaS glasses. The fiber drawing of the Er3+ doped Ge20Ga5Sb10S65 glasses and measurements of optical losses in mid-IR are currently in progress and first results were presented.

Published
2007

7. Diode-pumped cw and fs laser based on Yb:CaF 2

Author

Jean-Louis Doualan, Andrea Lucca, François Balembois, Patrick Georges, Patrice Camy, Richard Moncorge, and Frédéric Druon

Subjects
Ytterbium, Materials science, business.industry, Amplifier, Pulse duration, chemistry.chemical_element, Laser, law.invention, Optics, Mode-locking, chemistry, law, Femtosecond, Dispersion (optics), Optoelectronics, business, Diode
Abstract

Results of diode-pumped cw and fs laser operation of an Yb 3+ :CaF 2 single crystal are reported. With a 5-at.-% Yb 3+ -doped sample we obtained 5.8 W output power at 1053 nm, for 15 W of incident pump power at 980 nm. In passively mode-locked diode-pumped regime, using a Brewster-cut, 5-at.-% Yb 3+ -doped sample and prisms for dispersion compensation, the oscillator provided pulses as short as 150 fs, with 880 mW of average power and up to 1.4 W average output power, with pulse duration of 220 fs, centred at 1049 nm. The laser wavelength could be tuned from 1018 nm to 1072 nm in cw regime and from 1040 nm to 1053 nm in mode-locked regime. Using chirped mirrors for dispersion compensation, we obtained up to 1.74 W of average power, with pulse duration of 230 fs. For all these reasons, Yb:CaF 2 crystal is showing the great potential as active medium for high average power femtosecond oscillators and as amplifier medium for femtosecond pulses.

Published
2005

8. Experimental and theoretical investigation of a nonlinear lensing effect observed in a Cr:LiSAF laser

Author

Jean-Louis Doualan, Greg Quarles, Nicolas Passilly, Kamel Ait-Ameur, Antoine Hirth, Michael Fromager, and Richard Moncorge

Subjects
education.field_of_study, Chemistry, business.industry, Population, Laser, Ion, law.invention, Nonlinear system, Optics, law, Excited state, Atomic physics, business, Divergence (statistics), education, Refractive index
Abstract

An experiment has been performed to analyse a nonlinear lensing effect in a flashlamp pumped Cr 3+ :LiSAF laser which has been found to be adiverging lensing effect. The latter is due to the refrctive index change which is assumed to be proportional to the excited ion population. The corresponding constant of proportionality has been measured from the time variation of the laser pulses far-field divergence.

Published
2004

9. Up-conversion in YLF:Yb3+,Tm3+laser crystals

Author

Maria-France Joubert, I. K. Razumova, Richard Moncorge, and Alexandra M. Tkachuk

Subjects
Ytterbium, education.field_of_study, Materials science, business.industry, Population, chemistry.chemical_element, Laser, Photon upconversion, law.invention, Semiconductor laser theory, Thulium, chemistry, law, Optoelectronics, Atomic physics, business, education, Luminescence, Excitation
Abstract

We have studied the Yb3+ (reversible reaction) Tm3+ nonradiative energy transfer processes responsible for population of the 1G4 thulium level under Yb3+ or Tm3+ selective laser excitation of YLF:Tm3+,Yb3+ crystal. The microparameters and the rates of the energy transfer via cross-relaxation schemes are determined. It is concluded that the process of populating the 1G4 thulium level is greatly affected by up-conversion processes not only from the 3H4 but also from the 3F4 level, proceeding within the static decay model.

Published
1998

10. Frequency doubling and sum-frequency mixing operation at 4692, 471, and 473 nm in Nd:YAG

Author

Alain Braud, François Balembois, Patrice Camy, Jean-Louis Doualan, Richard Moncorge, Bin Xu, and Zhiping Cai

Subjects
Blue laser, Materials science, business.industry, Statistical and Nonlinear Physics, Laser pumping, Laser, Atomic and Molecular Physics, and Optics, law.invention, X-ray laser, Optics, law, Fiber laser, Diode-pumped solid-state laser, Optoelectronics, Laser power scaling, business, Fabry–Pérot interferometer
Abstract

We report CW blue laser operation at 469.2, 471, and 473 nm by efficient intracavity second-harmonic generation and sum-frequency generation of the R2→Z5 (938.5 nm) and R1→Z5 (946 nm) F43/2→I49/2 intermultiplet transitions in Nd:YAG with an LiB3O5 nonlinear crystal. Single-wavelength laser operation at 469.2 nm and multiwavelength operation at 469.2, 471, and 473 nm are obtained with maximum output powers of 1.4 and 0.15 W, respectively, by using a glass etalon as frequency selector. The 469 nm blue laser is an efficient pumping source of Pr3+-doped materials.

Published
2012

11. Room Temperature CW Laser Efficiency Yb3+−Er3+ and Tm3+ Doped Silicates in the Infrared Region

Author

C. Li, C. Borel, J.C. Souriau, Richard Moncorge, and Ch. Wyon

Subjects
Ytterbium, Materials science, business.industry, chemistry.chemical_element, Yttrium, Laser, Phosphate glass, law.invention, Optical pumping, Erbium, chemistry.chemical_compound, Thulium, chemistry, law, Optoelectronics, Orthosilicate, business
Abstract

This paper reports the main spectroscopic characterizations and laser experiments carried out on two new crystal hosts: the! yttrium orthosilicate Y2SiO5 and the silicate oxyapatite Sr2Y8(SiO4)6O2 (hereafter noted SYS), doped with Ytterbium and Erbium for a 1,55 μm laser emission and with Thulium for a 2 μm emission. Four new lasers have been demonstrated at 1,554 μm, 1,576 μm, 1,99 μm and 2,05 μm for respectively Yb,Er:SYS; Yb,Er:Y2SiO5; Tm:SYS and Tm:Y2SiO5. If for the Yb,Er codoped materials laser performances are still poor compared with the Yb,Er phosphate glass, the Tm doped materials exhibit laser performances similar to the Tm:YAG and look very promising.

Published
1993

12. 57-mJ 20-Hz multipass laser amplifier based on Yb: CaF2crystals

Author

Alain Pellegrina, Florence Friebel, Jean-Louis Doualan, Patrick Georges, Frédéric Druon, Dimitris N. Papadopoulos, Richard Moncorge, and Patrice Camy

Subjects
Ytterbium, Materials science, business.industry, Amplifier, chemistry.chemical_element, Laser, Pulse shaping, law.invention, Optics, Regenerative amplification, chemistry, law, Laser amplifiers, Thermal lensing, business
Abstract

We are presenting a 57 mJ multipass amplifier based on Yb:CaF2 operating at 20 Hz. Special attention has been given to the thermal measurement and management in order to push it to the 100 Hz regime.

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