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Proceedings Paper

KTP optical parametric oscillator pumped by the laser with a SBS phase conjugate mirror
Author(s): Baoquan Yao; Youlun Ju; Xin Yu; Qiang Shun Liu; Yuezhu Wang
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Paper Abstract

Potassium Titanium Oxide Phosphate (KTP) is a new nonlinear frequency-conversion crystal. It has high nonlinear coefficient, high damage threshold, easily-polished surface, and a broad transparency range. In this paper, the calculation method of angle phase-matching for parametric generation in KTP was presented. The angle phase-matching curve and their characteristics in KTP pumped by 532 nm, 694.3 nm radiation were calculated and analyzed. The propagating principal plane (x-y plane) and 56 degree(s) cut angle to z-axis were selected in our experiment, and the measured results agreed well with the calculated ones. The quality of laser beam is an important factor of affecting OPO threshold fluence and conversion efficiency, so the phase-conjugate technology of Stimulated Brillouin Scattering (SBS) for improving the pump laser beam quality was discussed and applied to the pump laser system. The tuning curves and output energy of KTP OPO pumped by Ruby laser (0.6943 micrometers ), the second harmonic of Nd:YAG (0.532 micrometers ) were measured and compared with the theoretical cases. An important result was obtained that the amplified back SBS light which was employed to pump KTP OPO could greatly reduce the OPO threshold.

Paper Details

Date Published: 30 September 1996
PDF: 5 pages
Proc. SPIE 2889, High-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers, (30 September 1996); doi: 10.1117/12.253280
Show Author Affiliations
Baoquan Yao, Harbin Institute of Technology (China)
Youlun Ju, Harbin Institute of Technology (China)
Xin Yu, Harbin Institute of Technology (China)
Qiang Shun Liu, Harbin Institute of Technology (China)
Yuezhu Wang, Harbin Institute of Technology (China)

Published in SPIE Proceedings Vol. 2889:
High-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers
Sui-Sheng Mei; Keith A. Truesdell, Editor(s)

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