发光学报, 2018, 39 (2): 162, 网络出版: 2018-03-14   

多波长半导体激光阵列端泵Nd∶YAG脉冲激光器

Multi-color Laser Diode Array End-pump Nd∶YAG Pulsed Laser
作者单位
1 北京工业大学 激光工程研究院, 北京100022
2 中国电子科技集团第五十三研究所, 辽宁 锦州121000
摘要
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6 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。
Abstract
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 6 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.

彭超, 刘学胜, 司汉英, 董剑, 曹明真, 刘友强, 王智勇. 多波长半导体激光阵列端泵Nd∶YAG脉冲激光器[J]. 发光学报, 2018, 39(2): 162. PENG Chao, LIU Xue-sheng, SI Han-ying, DONG Jian, CAO Ming-zhen, LIU You-qiang, WANG Zhi-yong. Multi-color Laser Diode Array End-pump Nd∶YAG Pulsed Laser[J]. Chinese Journal of Luminescence, 2018, 39(2): 162.

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