中国激光, 2018, 45 (1): 0101008, 网络出版: 2018-01-24
高增益掠入射板条激光放大器的实验研究 下载: 825次
Experimental Study of Grazing Incidence Slab Laser Amplifier with High Gain
激光光学 板条放大器 小信号 高增益 热转换系数 热效应 laser optics slab amplifier small signal high gain thermal conversion coefficient thermal effect
摘要
为了替代主控振荡功率放大结构中的多级光纤预放结构, 对小信号高增益的掠入射板条放大器进行了模拟和实验研究。利用板条内线性温度梯度引起的轴棱镜结构, 测量了板条晶体的热转换系数。结果表明:0.1 mW和1 W种子光提取时, 热转换系数分别为0.37和0.28;抽运光功率为55 W时, 两种情况下板条最大温升相差16 K;小信号提取时, 板条晶体内的温升是制约增益提高的主要因素;采用0.1 mW种子光注入且抽运光功率为50 W时, 可获得1.8 W的激光输出, 增益高达43 dB, 水平方向光束质量因子M2x=1.30, 垂直方向光束质量因子M2y=1.28。
Abstract
In order to replace multi-stage fiber pre-amplification structure in a master oscillator power amplification structure, a grazing incidence slab laser amplifier with small signal and high gain is simulated and studied experimentally. The thermal conversion coefficient of the slab crystal is measured by an axicon structure caused by the linear temperature gradient in the slab. The results show that the thermal conversion coefficient are 0.37 and 0.28 for 0.1 mW and 1 W seed laser extraction, respectively. When the pump light power is 55 W, the maximum temperature rise difference of the slab between two cases is 16 K. Under small signal extraction, the temperature rise in the slab crystal becomes the main constraint on the gain increasing. The laser output power of 1.8 W is obtained when the power of seed laser is 0.1 mW and the pump light power is 50 W. The gain is as high as 43 dB, the horizontal beam quality factor M2x is 1.30 and the vertical beam quality factor M2y is 1.28.
徐霜馥, 唐超, 汪勇, 郑峰, 项震, 刘东, 张翔, 叶志斌, 刘崇. 高增益掠入射板条激光放大器的实验研究[J]. 中国激光, 2018, 45(1): 0101008. Xu Shuangfu, Tang Chao, Wang Yong, Zheng Feng, Xiang Zhen, Liu Dong, Zhang Xiang, Ye Zhibin, Liu Chong. Experimental Study of Grazing Incidence Slab Laser Amplifier with High Gain[J]. Chinese Journal of Lasers, 2018, 45(1): 0101008.