1 064nm泵浦乙烷1.55μm拉曼激光研究  

Study on 1.55μm Raman laser in ethane gas pumped by 1064 nm pulsed laser

作　　者：王海洋 徐明 蔡向龙 刘栋[1] 孙景露 钱飞宇 李俊涛 郭敬为[1] Wang Haiyang;Xu Ming;Cai Xianglong;Liu Dong;Sun Jinglu;Qian Feiyu;Li Juntao;Guo Jingwei(Key Laboratory of Chemical Lasers,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China;School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,China;University of Chinese Academy of Sciences,Beijing 100049,China)

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 [2]中国科学技术大学化学与材料科学学院,合肥230026 [3]中国科学院大学,北京100049

出　　处：《强激光与粒子束》2025年第1期8-13,共6页High Power Laser and Particle Beams

摘　　要：受激拉曼散射(SRS)作为一种高效的激光频率改变方法,受到广泛关注。但是拉曼激光也存在着明显的不足,其波长缺少连续调谐的能力,因此需要开发更多的拉曼活性介质,提高拉曼频移覆盖密度。以波长为1 064 nm的激光作为泵浦源,以高压乙烷作为拉曼活性介质,产生了波长为1 550 nm的一阶拉曼(S_(1)),实验过程中未发现明显后向拉曼和高阶拉曼,通过优化实验条件,降低激光诱导击穿(LIB),使S_1的光子转化效率提高到了20.7%,最高脉冲能量达到21.2 mJ。并且首次测量了乙烷对1.55 μm激光的吸收系数和吸收截面,它们分别是5.71×10^(-8) m^(-1)·Pa^(-1)和2.35×10^(-24)cm^(2)。Stimulated Raman scattering is an effective non-linear frequency conversion method,and has received mnuch atention.However,Raman lasers also have drawbacks,such as wavelength of Raman lasers could not be tumed continuously,and the covenage of Raman laser wavelength is limnited.Therefore,more Raman active media ane required to improve the coverage of Raman lasers.In this woulk,1064 m laser was used as pump source,and pressuized ethane was used as Raman active medium,and 1550 nm Raman laser was produced.Neither obvious backward Raman laser nor bigher orders of Stokes Raman lasers were observed in this experiment.By the optimization of experimental parameters,laser induced brealkdown was reduced;the frst order Stokes(S1)Raman laser plhoton conversion efficiency was improved to 20.7%,and the maximum S1 energy was 21.2 mI.Ethane was found to have sigmuificant absorphion at wavelength of 1550 m,this was the major reason for the limnited photon couversion eficiency and pulse energy of Sq laser.The absorphion cefficient of ethane at 1550 mm was measured to be 5.71×10^(-8) m^(-1)·Pa^(-1),and the absorption eross section was measured to be 2.35×10^(-24)cm^(2).

关 键 词：受激拉曼散射 1.55μm激光 转化效率 吸收系数 乙烷 

分 类 号：TN248[电子电信—物理电子学]