中国激光, 2016, 43 (4): 0402008, 网络出版: 2016-04-29
N31钕玻璃片状放大器增益特性研究
Investigation on Gain Properties of N31 Neodymium Glass Slab Amplifiers
材料 钕玻璃 片状放大器 400 mm 口径 增益特性 materials neodymium glass slab amplifier 400 mm aperture gain characteristics
摘要
在惯性约束聚变(ICF)激光驱动器中,片状放大器系统为装置提供超过99%的能量,是装置最重要的系统之一。大口径高通量验证实验平台(ITB)装置是我国为开展ICF研究而研制的激光装置,单束输出能量达到19.6 kJ(脉宽5 ns,中心波长1053 nm)。介绍了大口径N31 钕玻璃片在ITB 装置400 mm 单口径片状放大器系统中应用的增益特性。实验结果表明,采用尺寸为810 mm×460 mm×40 mm、Nd3+离子浓度为3.5×1020 cm-3的N31钕玻璃片,结合装置片状放大器系统放电回路参数与抽运腔结构参数优化,输出小信号增益系数达到5.28%/cm,增益损耗比为15∶1;360 mm 激光光束口径范围内增益均匀性(最大值/平均值)达到1.063∶1。
Abstract
As one of the most important element in the inertial confinement fusion (ICF) laser device, slab amplifier provides over 99% energy. The integration-test-bed (ITB) is established for the research of ICF in China with the single- beam output energy up to 19.6 kJ (pulse width 5 ns, center wavelength 1053 nm). This paper studies characteristics of N31 neodymium glass in 400 mm aperture, single-segment amplifying system of ITB. The N31 glasses with size of 810 mm×460 mm×40 mm and Nd3+ ion concentration of 3.5×1020 cm-3 are used. Results show that combined with the optimized parameters of discharge circuit for slab amplifier and structure of pump cavity, the small signal gain coefficient reaches 5.28% cm-1, the gain ratio is 15:1 , and the gain uniformity is 1.063∶1 (maximum/ average) within 360 mm beam diameter.
温磊, 陈林, 刘建国, 陈远斌, 谢旭东, 刘勇, 郑奎兴, 陈伟, 胡丽丽, 吴谊群. N31钕玻璃片状放大器增益特性研究[J]. 中国激光, 2016, 43(4): 0402008. Wen Lei, Chen Lin, Liu Jianguo, Chen Yuanbin, Xie Xudong, Liu Yong, Zheng Kuixing, Chen Wei, Hu Lili, Wu Yiqun. Investigation on Gain Properties of N31 Neodymium Glass Slab Amplifiers[J]. Chinese Journal of Lasers, 2016, 43(4): 0402008.