中国激光, 2012, 39 (8): 0802002, 网络出版: 2012-06-25
高能量高效率钕玻璃再生放大器
High Energy and High Efficiency NdGlass Regenerative Amplifier
激光器 掺钕磷酸盐玻璃 再生放大器 小尺度自聚焦效应 光光转换效率 lasers neodymium-doped phosphate glass regenerative amplifier small-scale self-focusing effect optical-optical conversion efficiency
摘要
为了获得高能量、高效率的钕玻璃前置放大器,设计了一套钕玻璃再生放大系统。通过调节单程增益和优化腔模设计,使得增益介质中的小尺度自聚焦效应得到有效控制。在重复频率1 Hz运行下,获得最大输出能量21 mJ、脉冲宽度2.65 ns的激光输出,相应的光光转换效率为5%,总增益达108,光束质量因子M2=1.5,脉冲能量稳定性均方根(RMS)值小于2%(超过2 h连续工作),光谱的中心波长为1052.92 nm。
Abstract
To obtain high energy, high efficiency Ndglass preamplifier, a Ndglass regenerative amplifier system is designed. By adjusting the single pass gain and carefully optimizing the cavity mode, the small-scale self-focusing effect in the gain medium is effectively controlled. Maximum pulse energy of 21 mJ, pulse width of 2.65 ns is obtained at the repetition frequency of 1 Hz, corresponding to a high optical-optical conversion efficiency of 5% and amplification ratio of 108. The root-mean-square (RMS) of pulse to pulse energy stability is less than 2% during 2 h continuous operation. The laser has a good beam quality of M2=1.5. The spectrum is measured to be at center wavelength of 1052.92 nm.
王小发, 樊仲维, 余锦, 石朝辉, 赵天卓, 王培峰, 康治军, 连富强, 黄玉涛, 唐熊忻. 高能量高效率钕玻璃再生放大器[J]. 中国激光, 2012, 39(8): 0802002. Wang Xiaofa, Fan Zhongwei, Yu Jin, Shi Zhaohui, Zhao Tianzhuo, Wang Peifeng, Kang Zhijun, Lian Fuqiang, Huang Yutao, Tang Xiongxin. High Energy and High Efficiency NdGlass Regenerative Amplifier[J]. Chinese Journal of Lasers, 2012, 39(8): 0802002.