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Proceedings Paper

Phase mismatch compensation of second harmonic generation with controlling boundary temperature of type-II KTP crystal in high-power green laser
Author(s): De-Gang Xu; Jian-Quan Yao; Rui Zhou; Bai-Gang Zhang; Peng Wang
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Paper Abstract

We reported phase mismatch compensation of second harmonic generation with controlling boundary temperature of type-II KTP crystal in high power intracavity frequency-doubled Nd:AG laser. Thermal induced phase mismatching of the KTP crystal was analyzed theoretically by numerical computations of temperature derivative of refractive indices. The temperature gradient of the KTP crystal, phase matching angles change with difference boundary temperature of the KTP crystal, and tolerance temperature was analyzed. In the experiment, when two KTP crystals of difference type II phase matching condition (Φ=23.6°, Θ=90° at 27°C temperature, Φ=24.7°, Θ=90° at 80°C temperature) were applied to compensate the phase mismatching of the type-II KTP crystals. The maximum average 532nm output power of 85 W and 110W were generated when the boundary temperature of KTP were kept in 4°C and 48.8°C respectively. The corresponding conversion efficiency is 9.03% and 11%.

Paper Details

Date Published: 26 January 2005
PDF: 5 pages
Proc. SPIE 5627, High-Power Lasers and Applications III, (26 January 2005); doi: 10.1117/12.575039
Show Author Affiliations
De-Gang Xu, Tianjin Univ. (China)
Cooperated Institute of Nakai Univ. and Tianjin Univ. (China)
Jian-Quan Yao, Tianjin Univ. (China)
Cooperated Institute of Nakai Univ. and Tianjin Univ. (China)
Rui Zhou, Tianjin Univ. (China)
Cooperated Institute of Nakai Univ. and Tianjin Univ. (China)
Bai-Gang Zhang, Tianjin Univ. (China)
Cooperated Institute of Nakai Univ. and Tianjin Univ. (China)
Peng Wang, Tianjin Univ. (China)
Cooperated Institute of Nakai Univ. and Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 5627:
High-Power Lasers and Applications III
Dianyuan Fan; Ken-ichi Ueda; Jongmin Lee, Editor(s)

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