Stimulated Raman Scattering of a Modulated Laser Beam in Air: a Perturbation Approach
WEI Xiao-Hong1, QIAN Lie-Jia1, LI Ke-Yu2, ZHU He-Yuan1, FAN Dian-Yuan1
1Research Facility on Advanced Materials, State Key Laboratory for Advanced Photonic Materials and Devices, Department of Optical Science and Engineering, Fudan University, Shanghai 200433
2Center for High Energy Laser and Physics, China Academy of Engineering Physics, Mianyang 621900
Stimulated Raman Scattering of a Modulated Laser Beam in Air: a Perturbation Approach
1Research Facility on Advanced Materials, State Key Laboratory for Advanced Photonic Materials and Devices, Department of Optical Science and Engineering, Fudan University, Shanghai 200433
2Center for High Energy Laser and Physics, China Academy of Engineering Physics, Mianyang 621900
Abstract： Stimulated Raman scattering (SRS) of a third-harmonic beam of a high-power laser in air is analysed by using a perturbation approach. It is found that intensity modulations of the third-harmonic beam, resulting from the surface ripple of nonlinear crystal, can be significantly enhanced due to SRS, and the gain of instability increases with the spatial period of modulation. Numerical simulations based on the nonlinear coupled-wave equations verify the validity of the perturbation approach.
2006, Vol. 23 
