C. Labbe
University of Caen Lower Normandy
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Publication
Featured researches published by C. Labbe.
Optics Communications | 2002
C. Labbe; Jean-Louis Doualan; Patrice Camy; R. Moncorgé; M. Thuau
Abstract Laser emission at 2.8 μm in Er3+:CaF2 crystals is analysed for different excitation pump wavelengths: 800, 968 and 1545 nm. The best laser performance is obtained for 968 nm Ti:sapphire laser excitation with an absorbed pump power at threshold of 23 mW and a slope efficiency of 30%. Laser emission under 1545 nm excitation into the terminal level 4 I 13/2 of the laser transition is obtained due to efficient upconversion energy transfers.
Optics Communications | 2001
Yehoshua Kalisky; L. Kravchik; C. Labbe
Abstract We report the operation of a passively Q-switched diode end pumped Nd3+:KGW laser. Passive Q-switching operation was obtained by using a Cr4+:YAG or Cr4+:GGG as saturable absorbers. The free-running and the passively Q-switched characteristics of Nd:KGW were investigated and analyzed. At a free-running mode, a maximum slope efficiency of 46%, and an absorbed pumping threshold of 380 mW were obtained for 4.1 at.% doping level, with 1.5-W maximum output power at 3.60-W absorbed pumping power. The Nd:KGW laser beam quality exhibited a TEM00 with M2=1.6. The laser parameters were further analyzed as a function of the crystal heat sink temperature and the pump wavelengths. A passive Q-switched laser has been designed and operated, with a variety of Cr4+ doped garnets employed as saturable absorbers. The laser produced modulated output in the multi-kHz frequency domain. The pulse width and the modulation frequency dependence of the passively Q-switched, repetitively modulated laser output vs. the diode pump power for Nd:KGW crystals, provides the conditions needed to enhance the modulation frequency and the peak power of diode-pumped Nd:KGW laser.
Advanced Solid-State Lasers (2001), paper ME16 | 2001
Yehoshua Kalisky; Leonid Kravchik; C. Labbe; Karol Waichman
We report the operation of a passively Q-switched diode end pumped Nd3+:KGW laser, which was obtained by using a Cr4+:YAG or Cr4 GGG saturable absorbers in the multikHz frequency domain. The free-running (with maximum slope efficiency of 46 %), and the passively Q-switched characteristics of Nd:KGW were investigated and the use of Nd:KGW as microlasers will be discussed.
Journal of Alloys and Compounds | 1998
C. Labbe; Jean-Louis Doualan; Sylvain Girard; P. Le Boulanger
Abstract The excited state absorption cross-sections in π and σ polarisations are obtained for the transition 4 I 13/2 → 4 I 11/2 and 4 I 13/2 → 4 I 9/2 in Er 3+ :LiYF 4 . The population ratio between the two excited states 4 I 11/2 and 4 I 13/2 in Er 3+ :LiYF 4 and Er 3+ :Na 5 Y 9 F 32 have been performed using the measured gain cross-sections in the range 2.6–3 μm. The experiments have been done for two pump wavelengths—488 nm and 1.534 μm.
Advanced Solid State Lasers (1998), paper CS24 | 1998
C. Labbe; Jean-Louis Doualan; Sylvain Girard; P. Le Boulanger; R. Moncorge
Gain cross section and population rate measurements are performed around 2.8 pm in various E?’ doped laser crystals by using a pump-probe technique.
Optical Materials | 2018
C. Labbe; Jean-Louis Doualan; R. Moncorgé; Alain Braud; Patrice Camy
Journal of Luminescence | 2018
C. Labbe; Jean-Louis Doualan; R. Moncorgé; Alain Braud; Patrice Camy
Optics Communications | 2002
C. Labbe; Jean-Louis Doualan; Patrice Camy; R. Moncorgé; Michel Thuau
Optics Communications | 2001
Yehoshua Kalisky; Leonid Kravchik; C. Labbe
conference on lasers and electro optics | 1998
A.-F. Obaton; J. Bernard; C. Parent; G. Le Flem; C. Labbe; P. Le Boulanger; G. Boulton