3 October 1996 Phase-matching conditions for four-wave mixing in principal planes of biaxial crystals
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For general parametric collinear four wave mixing (FWM) or direct third harmonic generation (THG) processes involving fields at four different frequencies, the determination of phase matching (PM) directions becomes considerably difficult. But the situation may be greatly simplified when the incident waves propagate in one of the principal planes. In this case, we present here the criteria for determining whether PM can be satisfied for these processes. The explicit equations, even analytic expressions in some processes for obtaining the corresponding PM directions are presented. Data of PM directions for direct THG in several typical biaxial crystals are given.
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Xue-Lin Yang, Xue-Lin Yang, Shengwu Xie, Shengwu Xie, } "Phase-matching conditions for four-wave mixing in principal planes of biaxial crystals", Proc. SPIE 2897, Electro-Optic and Second Harmonic Generation Materials, Devices, and Applications, (3 October 1996); doi: 10.1117/12.252953; https://doi.org/10.1117/12.252953

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