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Appl Opt. 2004 Feb 10;43(5):1174-9.

Configuration to improve second-harmonic-generation conversion efficiency.

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1
Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China. biyong92184@hotmail.com

Abstract

The dependence of second-harmonic-generation (SHG) conversion efficiency on the intercrystal phase shift between two nonlinear crystals is analyzed with heuristic theory, and a novel scheme for SHG with two cascaded nonlinear crystals and a polarization modulator is proposed. More than 30 W output power is obtained experimentally at 532 nm with 70% external doubling efficiency. To the best of our knowledge, this is the highest conversion efficiency obtained with LiB3O5 crystal external frequency doubling. This scheme provides a simple and effective method for improving second-harmonic conversion efficiency.

PMID:
15008500
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