標題: Generation properties of coherent infrared radiation in the optical absorption region of GaSe crystal
作者: Chen, Ching-Wei
Hsu, Yu-Kuei
Huang, Jung Y.
Chang, Chen-Shiung
Zhang, Jing-Yuan
Pan, Ci-Ling
光電工程學系
Department of Photonics
公開日期: 30-Oct-2006
摘要: We report a study of the effect of optical absorption on generation of coherent infrared radiation from mid-IR to THz region from GaSe crystal. The infrared-active modes of epsilon-GaSe crystal at 236 cm(-1) and 214 cm(-1) were found to be responsible for the observed optical dispersion and infrared absorption edge. Based upon phase matching characteristics of GaSe for difference-frequency generation (DFG), new Sellmeier equations of GaSe were proposed. The output THz power variation with wavelength can be properly explained with a decrease of parametric gain and the spectral profile of absorption coefficient of GaSe. The adverse effect of infrared absorption on (DFG) process can partially be compensated by doping GaSe crystal with erbium ions. (c) 2006 Optical Society of America.
URI: http://dx.doi.org/10.1364/OE.14.010636
http://hdl.handle.net/11536/11653
ISSN: 1094-4087
DOI: 10.1364/OE.14.010636
期刊: OPTICS EXPRESS
Volume: 14
Issue: 22
起始頁: 10636
結束頁: 10644
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