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Proceedings Paper

A Sensitive Fiber-Optic Gas Spectrophone
Author(s): D. H. Leslie; R. O . Miles; A. Dandridge
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Paper 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.

Paper Details

Date Published: 19 September 1983
PDF: 5 pages
Proc. SPIE 0412, Fiber Optic and Laser Sensors I, (19 September 1983); doi: 10.1117/12.935811
Show Author Affiliations
D. H. Leslie, Naval Research Laboratory (United States)
R. O . Miles, Naval Research Laboratory (United States)
A. Dandridge, Naval Research Laboratory (United States)


Published in SPIE Proceedings Vol. 0412:
Fiber Optic and Laser Sensors I
Emery L. Moore; O. Glenn Ramer, Editor(s)

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