碘激光的H2振动受激拉曼阈值研究  

Vibrational stimulated Raman conversion threshold of H_2 pumped by iodine laser

作　　者：刘栋[1] 蔡向龙 何山[1] 周冬健 郭敬为[1] 金玉奇[1] 

机构地区：[1]中国科学院大连化学物理研究所,化学激光重点实验室,辽宁大连116023

出　　处：《强激光与粒子束》2017年第5期1-5,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11304311);中国科学院化学激光重点实验室创新课题基金项目(KLCL-2016-N10)

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100~130mJ(脉宽100ns)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2900nm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。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 ap- plied to reduce the SRS threshold successfully. SRS laser of 2900 nm is obtained and the photon conversion efficiency reaches 8. 70/00. 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.

关 键 词：振动受激拉曼变频 碘激光 量子转化效率 拉曼增益 

分 类 号：TN248[电子电信—物理电子学]