多波长半导体激光阵列端泵Nd:YAG脉冲激光器

研制了无温控多波长激光二极管阵列端面泵浦Nd：YAG电光调Q激光器。采用4 000 W多波长准连续激光二极管阵列作为泵浦源，快轴准直镜与透镜导管作为泵浦耦合系统，端面泵浦φ6 mm×60 mm的Nd：YAG晶体，并采用RTP晶体进行电光调Q实验。在重复频率5 Hz、室温（25℃）时，激光器获得了最大输出能量74.4 mJ、脉宽15 ns的1 064 nm脉冲激光输出，光光转换效率达到11%。在25~55℃的工作温度下，对多波长LDA的光谱特征与激光器的输出特性作了测试，激光器输出能量随着工作温度的上升而先迅速下降再逐步保持稳定，当重复频率分别为5 Hz和10 Hz时，激光器对应的最低输出能量分别为48 mJ与37 mJ。

Multi-color Laser Diode Array End-pump Nd:YAG Pulsed Laser

Multi-color laser diode array end-pumped Nd:YAG electro-optical Q-switched laser without temperature controlled was developed. Using a 4 000 W multi-color QCW laser diode array as the pumping source, and fast axis collimator, lens duct as coupling system, and RTP as Q-switch, end-pumped φ6 mm×60 mm Nd:YAG crystal, the laser obtained a 1 064 nm pulsed laser output with maximum output energy of 74.4 mJ, pulse width of 15 ns and optical conversion efficiency of 11% at the repetition rate of 5 Hz and 25℃. The spectral characteristics of multi-wavelength LDA and the output characteristics of the laser were tested under operating temperature of 25℃ to 55℃, the output energy of the laser rapidly decreases, then gradually stabilizes with the increase of the working temperature. When the repetition rates are 5 Hz and 10 Hz, the minimum output energy of the laser is 48 mJ and 37 mJ, respectively. Experiments indicate that the multi-color laser diode array has more value in realizing no temperature control of high energy all-solid-state lasers.