Induced Diffraction in Phase-Mismatched Second-Harmonic Generation
SU Wen-Hua, QIAN Lie-Jia, FU Xi-Quan, YANG Hua, ZHU He-Yuan
Research Facility for Advanced Materials, State Key Laboratory for Advanced Photonic Materials & Devices, Department of Optical Science and Engineering, Fudan University, Shanghai 200433
Induced Diffraction in Phase-Mismatched Second-Harmonic Generation
SU Wen-Hua;QIAN Lie-Jia;FU Xi-Quan;YANG Hua;ZHU He-Yuan
Research Facility for Advanced Materials, State Key Laboratory for Advanced Photonic Materials & Devices, Department of Optical Science and Engineering, Fudan University, Shanghai 200433
摘要We show analytically that in phase-mismatched second-harmonic generation, an effective diffraction is induced at the second-harmonic (SH) frequency. Numerical simulation results agree with the analytical predictions. Compared to the case of linear propagation, the effect of the overall diffraction at the SH frequency becomes doubled due to the induced diffraction, which causes an interesting result that the SH beam width will be larger than that of the fundamental field.
Abstract：We show analytically that in phase-mismatched second-harmonic generation, an effective diffraction is induced at the second-harmonic (SH) frequency. Numerical simulation results agree with the analytical predictions. Compared to the case of linear propagation, the effect of the overall diffraction at the SH frequency becomes doubled due to the induced diffraction, which causes an interesting result that the SH beam width will be larger than that of the fundamental field.
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2007, Vol. 24 
