A Sensitive Fiber-Optic Gas Spectrophone

D. H. Leslie; R. O . Miles; A. Dandridge

doi:10.1117/12.935811

19 September 1983 A Sensitive Fiber-Optic Gas Spectrophone

D. H. Leslie, R. O . Miles, A. Dandridge

Proceedings Volume 0412, Fiber Optic and Laser Sensors I; (1983) https://doi.org/10.1117/12.935811
Event: 1983 Technical Symposium East, 1983, Arlington, United States

Abstract

An improved spectrophone for measurements of laser absorption in gases has been tested. The device employs a fiber-optic interferometer, wound into a cylindrical shape, as the acoustic sensor. Performance of the device was evaluated by measuring the absorption of 3.39 μm HeNe laser radiation in a calibrated mixture of methane in Argon. Results indicate a minimum detectable absorption capability of 2x10^-7cm^-1 W/√ MHz , although a background signal 30 dBV above the noise limited performance. We report an improvement in sensitivity several orders of magnitude above the first fiber-optic spectrophone.

Citation Download Citation

D. H. Leslie, R. O . Miles, and A. Dandridge "A Sensitive Fiber-Optic Gas Spectrophone", Proc. SPIE 0412, Fiber Optic and Laser Sensors I, (19 September 1983); https://doi.org/10.1117/12.935811

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