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Optical Engineering

Difference frequency mixing of periodically poled lithium niobate optical parametric oscillator output waves in GaSe crystal
Author(s): S. Haidar; Y. K. Hsu; Chen Shiung Chang; S. C. Wang; Hiromasa Ito
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Paper Abstract

We report on an optical parametric oscillator (OPO) based on periodically poled lithium niobate (PPLN) pumped by a Nd:YAG laser, and on extending its tuning range by difference-frequency mixing of OPO output waves in GaSe crystal. Maximum combined signal and idler pulse energy of 2.7 mJ and slope efficiency of 25% have been achieved. The tuning range is 1.71 to 1.98 ?m for the signal wave and 2.81 to 2.30 ?m for the idler wave, using a single set of mirrors. As an application of this PPLN OPO, the signal and the idler waves are difference-frequency- mixed in a GaSe crystal to produce tunable mid-IR from 4.35 to 14.25 ?m. The efficiency of the mixing has been analyzed, considering the experimental results.

Paper Details

Date Published: 1 August 2002
PDF: 4 pages
Opt. Eng. 41(8) doi: 10.1117/1.1488606
Published in: Optical Engineering Volume 41, Issue 8
Show Author Affiliations
S. Haidar, Tohoku Univ. (Japan)
Y. K. Hsu, National Chiao Tung Univ. (Taiwan)
Chen Shiung Chang, National Chiao Tung Univ. (Taiwan)
S. C. Wang, National Chiao Tung Univ. (Taiwan)
Hiromasa Ito, Tohoku Univ. and RIKEN--The Institute of Physical and Chemical Research (Japan)

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