1 福建江夏学院 数理教研部，福建 福州 350108
2 福建江夏学院 电子信息科学学院，福建 福州 350108
利用激光速率方程理论，对Tm，Ho激光系统计算预测得出最佳耦合输出透过率和调Q激光脉冲宽度。实验采用Tm， Ho:LuLF为增益介质，三向侧面泵浦，环形腔声光调Q。选用透过率20%和30%的输出镜作对比。在透过率20%耦合输出时，得到调Q激光脉冲能量最大为58.0 mJ，对应光光转换效率为1.45%；在透过率30%耦合输出时，得到调Q激光脉冲能量最大为62.9 mJ，对应光光转换效率1.57%，并且获得了最大动静比48.7%。激光脉冲宽度在注入能量3.25 J时为417.2 ns。与理论计算结果较为一致。
激光器 速率方程 声光调Q laser rate-equation Tm Tm Ho:LuLF Ho:LuLF acoustic-optic Q-switched
Author Affiliations
Abstract
1 Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 Research Center of Space Laser Information Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
3 Beijing Institute of Tracking and Telecommunication Technology, Beijing 100094, China
A diode-side-pumped Tm,Ho:LuLiF laser at 2-1m wavelength obtained in a ring resonator and its amplification experiment are reported. At the maximum pump energy of 4.7 J available for the oscillator, the output energy per pulse for the oscillator decreases from 904 to 483 mJ in free running mode, and decreases from 106 to 68 mJ in Q-switched mode, with an increase of pump pulse repetition rate from 1 to 5 Hz. When considering the amplifier, 99-mJ Q-switched output energy is achieved at 5-Hz repetition rate.
固体激光器 Tm Ho:LuLF 2微米 声光调Q 140.0140 Lasers and laser optics 140.3540 Lasers, Q-switched 140.3580 Lasers, solid-state Chinese Optics Letters
2011, 9(9): 091407
Author Affiliations
Abstract
1 Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 Beijing Institute of Tracking and Telecommunication Technology, Beijing 100094, China
The characteristics of diode end-pumped Tm,Ho:LuLiF for continuous wave (CW) running and high pulse repetition frequency (PRF) Q-switched operation are illustrated. In the CW mode, 950-mW output power with a slope efficiency of 24% is obtained. In the Q-switched mode, output energy of 78 μJ under 10 kHz with a slope efficiency of 23% is achieved. The pulse stability, pulse width as a function of pump intensity, and spectral characteristics are also analyzed.
固体激光器 Tm Ho:LuLF 2微米 声光调Q 140.0140 Lasers and laser optics 140.3540 Lasers, Q-switched 140.5680 Rare earth and transition metal solid-state lasers 140.3580 Lasers, solid-state Chinese Optics Letters
2011, 9(2): 021401
Author Affiliations
Abstract
1 Key Laboratory of Material Science and Technology for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 Graduate School of Chinese Academy of Sciences, Beijing 100049, China
3 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
LiLuF4 single crystals co-doped with thulium (5%) and holmium (0.5%), having large size, intact shape, and high optical quality, are successfully grown by the Czochralski technique. Absorption and fluorescence spectra of the crystal are measured. The absorption spectrum shows that the main absorption band locates at near 686 and 792 nm and the °uorescence spectrum peaks at 2.05 \mu m. At room temperature, the as-grown Tm, Ho: LiLuF4 single crystals are end-pumped by a fiber-coupled laser diode system with pumping wavelength of 795 nm under CW operations. A power of 50 mw continuous laser output at 2.05 \mu m wavelength is achieved. Meanwhile an obvious green light is detected.
Tm Ho:LuLF晶体 2μm激光 提拉法 上转换 160.3380 Laser materials 160.5690 Rare-earth-doped materials 160.4760 Optical properties 140.3380 Laser materials Chinese Optics Letters
2010, 8(1): 63
