Effects of transverse profile of pump field on second harmonic generation in periodic nonlinear materials |
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| Authors: | Zhang Han-Zhuang Yang Jian-Bing and Gao Jin-Yue |
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| Affiliation: | College of Physics, Jilin University, Changchun 130023, China |
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| Abstract: | We report on a theoretical analysis of the effects of a converging pump field of Gaussian transverse profile on second harmonic generation in a periodic nonlinear material with quasi-phase-matching. The outputs of the centre intensity and the intensity flux for second harmonic generation are derived by simulation, based on the parameters of quasi-phase-mismatch, the waist and focus positions of the input pump beam. The results show that when the transverse profile of the pump field is taken into account, the quasi-phase-match value and focus position of input beam for maximal second harmonic generation follow new criteria. |
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| Keywords: | periodic nonlinear materials second harmonic generation quasi-phase-matching |
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