A mid-infrared spectrometer based on difference...

A mid-infrared spectrometer based on difference frequency generation

Abstract

A mid-infrared spectrometer operating in the range from 3.42 to 4.78μm based on difference-frequency mixing of a tunable Ti:Sapphire laser and a diode-pumped monolithic Nd:YAG laser in periodically poled LiNbO3 (PPLN) crystals was developed. A system line width of about 36MHz was obtained. An energy conversion efficiency of 0.6mW/W2 was obtained at 3.70μm. The direct absorption spectra of pure methane and pure carbon dioxide samples were measured to test the performance of the spectrometer.

Authors

Deng L; Han L; Liang W; Cao Z; Xu C; Zhang W; Gong Z; Gao X

Journal

Optics and Lasers in Engineering, Vol. 45, No. 11, pp. 1055–1058

Publisher

Elsevier

Publication Date

November 1, 2007

DOI

10.1016/j.optlaseng.2007.05.002

ISSN

0143-8166

Associated Experts

Chang Qing Xu

Professor, Faculty of Engineering

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