Experimental Investigation of Stimulated Raman Scattering in H2 Pumped by the Third Harmonic Solid-state Laser at 355 nm

利用Nd～1YAG激光器的三倍频输出(355nm)在H-2中的受激拉曼散射(SRS)获得波长在204～867 nm范围内的激光输出。当抽运能量为70 mJ时观察到四阶Stokes光和五阶Anti-Stokes光，其中第一阶Stokes光(416 nm)输出能量为28．7 mJ，第二阶Stokes光(503 nm)输出能量为16 mJ，一阶Anti-Stokes光(309nm)输出能量为3mJ。研究了H-2压力和各阶Stokes光能量的关系．同时观察到环行光斑和脉宽压缩现象。The Stimulated Raman Scattering (SRS) in H2 pumped by the third harmonic of Nd: YAG laser (355 nm) was investigated. The wavelength of pump laser has been shifted into 204 ~ 867 nm wavelength region. When the pump laser was operated at laser energy of 70 mj. four orders of Stokes and five orders of anti-Stokes have been observed in this experiment. The corresponding output energy of the first order Stokes (416 nm). the second order Stokes (503 nm) and the first order anti-Stokes (309 nm) was 28. 7 mj. 16 mj and 3 mj. respectively. The relationships between the pressure of Hz and energy of each Stokes were investigated. Moreover, the circle beam spot and phenomena of pulse-width compressed have been observed