Tunable single-frequency diode laser at wavelength λ=1.65 μm for methane concentration measurements |
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| Authors: | A V Gladyshev M I Belovolov S A Vasiliev E M Dianov O I Medvedkov A I Nadezhdinskii O V Ershov A G Beresin V P Duraev E T Nedelin |
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| Institution: | Fiber Optics Research Center, General Physics Institute of the Russian Academy of Sciences, 38 Vavilov St., 119991 Moscow, Russia. alexglad@fo.gpi.ru |
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| Abstract: | This paper deals with the development of a novel single-frequency tunable diode laser with fiber-optic output for gas-analysis applications. The approach we propose is a convenient, simple and cheap solution for spectroscopy of single absorption lines of any gases having absorption bands in the optical fiber transparency window (0.7 microm/1.7 microm). The presence of fiber-optic output is an additional advantage for remote sensing applications. The laser operation is demonstrated as applied to R7 line of 2 nu(3) methane absorption band at lambda = 1.645 microm. The mode-hop-free tuning range of 35 GHz (1.2 cm(-1)) has been achieved. |
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| Keywords: | Methane Tunable diode laser Fiber grating |
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