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Proceedings Paper

Generation of tunable coherent nanosecond 8-12μm mid-infrared pulses based on difference frequency generation in GaSe and ZnGeP2
Author(s): Kai Zhong; Jianquan Yao; Jiansong Li; Degang Xu; Peng Wang
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Paper Abstract

Based on the theoretical analysis on the phase-matching relations, effective nonlinear coefficients, walk-off and acceptance angles, the generation of tunable and coherent nanosecond mid-infrared radiation covering the 8-12μm range is realized by use of difference frequency generation (DFG) in a GaSe and a ZnGeP2 (ZGP) crystal. Using an 8-mm-long GaSe crystal, we achieve the mid-infrared generation that is continuously tunable from 8.28μm to 18.365μm. The maximum pulse energy is 31μJ at 8.76μm, corresponding to the conversion efficiency of 0.9% and the maximum midinfrared peak power of about 7kW. In the case of using an 8-mm-long ZGP crystal, the tuning range is from 7.2μm to 12.2μm. The maximum pulse energy is about 10μJ at 9.22μm, corresponding to the conversion efficiency of 0.45% and the peak power of 2.2kW.

Paper Details

Date Published: 4 November 2010
PDF: 7 pages
Proc. SPIE 7846, Quantum and Nonlinear Optics, 78460S (4 November 2010); doi: 10.1117/12.868562
Show Author Affiliations
Kai Zhong, Tianjin Univ. (China)
Jianquan Yao, Tianjin Univ. (China)
Jiansong Li, Tianjin Univ. (China)
Degang Xu, Tianjin Univ. (China)
Peng Wang, Tianjin Univ. (China)

Published in SPIE Proceedings Vol. 7846:
Quantum and Nonlinear Optics
Qihuang Gong; Guang-Can Guo; Yuen-Ron Shen, Editor(s)

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