Mid-infrared trace gas detection using continuous-wave difference frequency generation in periodically poled RbTiOAsO4

被引：53

作者：

Chen, W

Mouret, G

Boucher, D

Tittel, FK

机构：

[1] Univ Littoral, MREID, F-59140 Dunkerque, France

[2] Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2001年 / 72卷 / 07期

关键词：

D O I：

10.1007/s003400100561

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A tunable mid-infrared continuous-wave (cw) spectroscopic source in the 3.4-4.5 mum region is reported, based on difference frequency generation (DFG) in a quasi-phase-matched periodically poled RbTiOAsO4 (PPRTA) crystal, DFG power levels of 10 muW were generated at approximately 4 mum in a 20-mm long PPRTA crystal by mixing two cw single-frequency Ti:Al2O3 lasers operating near 713 nm and 871 nm, respectively, using a laser pump power of 300 mW. A quasi-phase-matched infrared wavelength-tuning bandwidth (FWHM) of similar to 12 cm(-1) and a temperature tuning rate of 1.02 cm(-1)/degreesC were achieved. Experimental derails regarding the feasibility of trace gas detection based on absorption spectroscopy of CO2 in ambient air using this DFG radiation source are also described.

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页码：873 / 876

页数：4

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