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A low cost mutiplexed 1.331 μm spectroscopic remote methane sensor system

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Abstract

A remote multiplexed methane sensor system taking advantage of low cost 1.331 μm SLD is demonstrated. It has long time stabilization, immunize from the influence of the temperature changing. Reference light is adopted in the system to reduce the affection of attenuation caused by long distance transmission of light in fiber and the drift of the SLD output power. Resolution of 0.01% (10-s time constant) is obtained by introducing intensity modulation and Lock-In-Amp.

© 2006 IEICE

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