强激光与粒子束, 2017, 29 (5): 051001, 网络出版: 2017-05-04
碘激光的H2振动受激拉曼阈值研究
Vibrational stimulated Raman conversion threshold of H2 pumped by iodine laser
振动受激拉曼变频 碘激光 量子转化效率 拉曼增益 vibrational stimulated Raman scattering iodine laser photon conversion efficiency Raman gain
摘要
首次实现了脉冲光解碘激光作为基频光的氢气振动受激拉曼变频,对碘激光的波长转换有着重要意义。在碘激光单脉冲能量100~130 mJ(脉宽100 ns)的条件下, 采用双次聚焦技术降低了高压氢气的振动受激拉曼变频的阈值,获得了波长为2900 nm中红外激光,光子转化效率最高达到8.7%。实验发现当拉曼介质氢气气压大于1 MPa后,一级斯托克斯光的拉曼转化效率不再随气压变化,并对这一现象进行了理论分析和归属。
Abstract
The hydrogen vibrational stimulated Raman scattering (SRS) pumped by a photolytic iodine laser (PIL) has been demonstrated for the first time. Under the condition of PIL pulse energy of 100-130 mJ (100 ns), double pass configuration is applied to reduce the SRS threshold successfully. SRS laser of 2900 nm is obtained and the photon conversion efficiency reaches 8.7%. The conversion efficiency of the first stokes light is found not affected by the pressure of hydrogen, once it is more than 1 MPa. Theoretical analysis is applied to explain this phenomenon.
刘栋, 蔡向龙, 何山, 周冬健, 郭敬为, 金玉奇. 碘激光的H2振动受激拉曼阈值研究[J]. 强激光与粒子束, 2017, 29(5): 051001. Liu Dong, Cai Xianglong, He Shan, Zhou Dongjian, Guo Jingwei, Jin Yuqi. Vibrational stimulated Raman conversion threshold of H2 pumped by iodine laser[J]. High Power Laser and Particle Beams, 2017, 29(5): 051001.
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