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Optical Engineering

Improved growth of AgGaSe2 crystals and phase matched second harmonic generation of 10.6um CO2 laser radiation
Author(s): Beijun Zhao; Shifu Zhu; Yu Li; Feng-liang Yu; Qi-feng Li; Zhenghui Li; Xing-hua Zhu; Shuang-yun Shao; Jian Lin
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Paper Abstract

Good quality AgGaSe2 single crystal 22 mm in diameter and 80 mm in length is grown by an improved technique, i.e., descending ampoule with rotation. Although the crystals grow with optical defects, postgrowth heat treatment procedures are used to successfully eliminate the defects and produce material of 62.4% IR transmission at 10.6?m. The frequency-doubling device is cut from a cylindrical crystal boule using a new orientation cut method according to the type-1 phase-matched condition. A high optical quality, orientated AgGaSe2 single crystal of 10x 10x 12 mm size is used for second harmonic generation (SHG) of the pulsed output of a 10.6?m CO2 miniature transversely excited atmospheric laser. A relatively high energy conversion efficiency of 12% is obtained. It is found that the optical surface damage threshold of the crystal is larger than 12 MW/cm2.

Paper Details

Date Published: 1 December 1999
PDF: 5 pages
Opt. Eng. 38(12) doi: 10.1117/1.602322
Published in: Optical Engineering Volume 38, Issue 12
Show Author Affiliations
Beijun Zhao, Sichuan Univ. (China)
Shifu Zhu, Sichuan Univ. (China)
Yu Li, Sichuan Univ. (China)
Feng-liang Yu, Sichuan Univ. (China)
Qi-feng Li, Sichuan Univ. (China)
Zhenghui Li, Sichuan Univ. (China)
Xing-hua Zhu, Sichuan Univ. (China)
Shuang-yun Shao, Sichuan Univ. (China)
Jian Lin, Sichuan Univ. (China)

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