Type I Versus Type II BBO Crystal For Frequency Conversion

J T Lin

doi:10.1117/12.944441

27 June 1988 Type I Versus Type II BBO Crystal For Frequency Conversion

J T Lin

Proceedings Volume 0895, Laser Optics for Intracavity and Extracavity Applications; (1988) https://doi.org/10.1117/12.944441
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States

Abstract

A general theory for three-wave-mixing valid for both type I and type II is presented. Analytic expressions for the SHG efficiencies are compared with the numerical exact solution. The effects of beam walk-off and spatial profile overlap for various polarizations are included. System parameters such as deff, E-number, F-number and angular sensitivity are calculated for type I and II BBO crystals. The integrated efficiency for divergent pump beam is calculated for various ratio of beam divergence and crystal angular acceptance width. Experimental data for SHG of 1064 nm (YAG-laser) are presented and compared for type I and type II BBO crystal. From our measured data, we conclude that the simple model based upon the ratio of P( laser power) and the beam quality (Q) or inverse-square of the angular sensitivity overestimates the effects of beam quality on the efficiency. A rigorous model including the complicated coupling between P, Q and the efficiency is presented which correctly explains our data.

Citation Download Citation

J T Lin "Type I Versus Type II BBO Crystal For Frequency Conversion", Proc. SPIE 0895, Laser Optics for Intracavity and Extracavity Applications, (27 June 1988); https://doi.org/10.1117/12.944441

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