A5014521077- Solid State Laser Technologies
- Photorefractive and Nonlinear Optics
- Crystal Structures and Properties
- Advanced Fiber Laser Technologies
- Luminescence Properties of Advanced Materials
- Glass properties and applications
- Laser Design and Applications
- High-pressure geophysics and materials
- Laser-Matter Interactions and Applications
- Optical and Acousto-Optic Technologies
- Solid-state spectroscopy and crystallography
- Mineralogy and Gemology Studies
- Nonlinear Optical Materials Research
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Microwave Dielectric Ceramics Synthesis
- Photonic Crystal and Fiber Optics
- X-ray Diffraction in Crystallography
- Advanced Fiber Optic Sensors
- Acoustic Wave Resonator Technologies
- Laser Material Processing Techniques
- Optical properties and cooling technologies in crystalline materials
- Optical Systems and Laser Technology
- Laser-induced spectroscopy and plasma
- Advanced ceramic materials synthesis
Chimie ParisTech
2014-2024
Centre National de la Recherche Scientifique
2011-2024
Université Paris Sciences et Lettres
2014-2024
Institut de Recherche de Chimie Paris
2014-2024
Sorbonne Université
2012-2023
Chimie de la Matière Condensée de Paris
2000-2014
Laboratoire de Chimie
2003-2014
Collège de France
2013
Laboratoire Matériaux Optiques, Photonique et Systèmes
2011
Supélec
2011
Large and good-optical-quality crystals of gadolinium calcium oxoborate, Ca4GdO(BO3)3 (GdCOB) have been grown from a melt by the Czochralski pulling method. The crystal is absolutely insensitive to moisture. Linear- quadratic nonlinear-optical properties this new monoclinic biaxial borate are reported. transparent in visible near IR (from 0.32 2.7 µm), with favorable phase matching conditions for second-harmonic generation. Experimental phase-matching results, measured femtosecond broadband...
The surge of interest in ytterbium-doped materials has led to their being proposed as substitutes for widely used neodymium counterparts infrared laser emission. Spectroscopic and investigations Ca4GdO(BO3)3 (Yb:GdCOB), a new crystal, are reported. Laser performances under titanium:sapphire pumping suggest that this material is suitable schemes include laser-diode pumping. A maximum slope efficiency 58.8% with corresponding threshold 40 mW been demonstrated 1% output coupler. oscillations...
We have developed a diode-pumped Yb3+:Sr3YBO33 (Yb:BOYS) laser generating 69-fs pulses, at central wavelength of 1062 nm. This is mode locked by use semiconductor saturable-absorber mirror and emits 80 mW average power 113 MHz. is, to our knowledge, the first mode-locked Yb:BOYS shortest duration obtained from an ytterbium with crystalline host. The can be tuned 1051 1070 nm, for sub-100-fs pulses. also achieved as high 300 pulse 86 fs 1068
A diode-pumped Yb>(3+):Ca(4)GdO(BO>(3))(3) (Yb:GdCOB) laser generating 90-fs pulses at a center wavelength of 1045 nm is demonstrated. This is, to our knowledge, the shortest pulse duration obtained from an ytterbium with crystalline host. mode locked high-finesse semiconductor saturable-absorber mirror and emits 40 mW average power repetition rate 100 MHz.
The new nonlinear optical crystal YxLayScz(BO3)4 (x + y z = 4) has been discovered. Phase boundaries have established in the determination of x, y, composition parameters that define existence region trigonal huntite-type structure. From single-crystal X-ray diffraction measurements, member Y0.57La0.72Sc2.71(BO3)4 found to crystallize space group R32 with cell dimensions a 9.774(1) and c 7.944(3) Å. Large single crystals grown by high-temperature solution method. high-energy absorption edge...
The first demonstration of laser action in a Yb3+:Sr3Y(BO3)3 crystal is reported. This new material exhibits particularly broad absorption and emission bandwidths (6 60 nm, respectively) hence particular interest for diode-pumped femtosecond tunable sources. Efficient operation from diode pumping (1.4 W cw power obtained with 3.6 pump as much 3.4 peak high-power quasi-cw pumping) together smooth tunability (over 50 nm FWHM) For the comparison, efficiency thermal limitations Yb:glass...
Holmium doped scandium silicate (Ho:SSO) bulk crystal grown by Czochralski technique is reported. The absorption cross section of 4.8 × 10(-21) cm2 at pumping wavelength 1940 nm and emission 5.56 lasing 2112 were calculated, respectively. Lifetime was measured to be 1.51 ms 300 K 0.92 77 K. Continuous-wave laser operated using a diode-pumped Tm:YAP as pump source with central nm. Output power 385 mW primarily obtained.
Properties such as chemical and structural stability, thermal expansion conductivity are investigated, with the purpose of better characterizing behaviour Czochralski grown GdCOB [Ca4GdO(BO3)3], oxoborate single crystals, to be used in optical devices.
We present a theoretical and experimental analysis of diode-pumped Yb/sup 3+/-doped Ca/sub 4/GdO(BO/sub 3/)/sub 3/ (Yb:GdCOB) laser. A new model for quasi-three-level laser is described. The effects absorption saturation, temperature profile, the beam quality M/sup 2/ factor pump diode have been taken into account, first time to our knowledge. obtained good agreement between measurements calculations with two different wavelengths, 902 976 nm. Our has given predictions performances crystal...
Incongruent melting nonlinear optical (NLO) crystals of LaxGdyScz(BO3)4 (x + y z = 4) - LGSB have been grown by the Czochralski method, for first time to our knowledge. The crystal growth conditions are discussed, and melt composition parameters were optimized. chemical best quality was determined be La0.64Gd0.41Sc2.95(BO3)4. It crystallizes in noncentrosymmetric space group R32 (Z 3) with cell dimensions a 9.794(4) Å c 7.961(6) Å. transmission window refractive indices measured,...
We report on the crystal growth, spectroscopic properties and visible laser performances of Pr3+-doped Sr0.7La0.3Mg0.3Al11.7O19 (ASL). ASL crystals doped with 2 at.% 4 Pr3+ were grown by Czochralski method. The experiments carried out in a plane-concave resonator under excitation at 486 nm, provided from 2ω-OPSL. Efficient emission was obtained an 8 mm long sample Pr(2at.%):ASL. maximum output power amounted to 267 mW, 52 318 mW absorbed 1.2W for red, orange, deep red emission, respectively.
We report continuous-wave laser operation with Yb(15 at. %):Ca4YO(BO3)3 (Yb:YCOB) reaching 26 W of output power in the thin disk setup at an optical-to-optical efficiency 58% and a slope 67% E∥Z polarization. In E∥X polarization was slightly lower, but large tuning range 95 nm several watts could be obtained here. Furthermore, applying pinhole method, fluorescence lifetime determined to 2.2 ms. The results reveal that Yb:YCOB is promising candidate for generation very short pulses high pulse...