Photoacoustic detection of trace gases with an optical microphone

An alternative to the electrical microphone for photoacoustic detection of trace gases is presented. This new microphone is made of standard monomode optical fibers wound and glued on a thin plate and is one of the arms of a Michelson interferometer. A detection scheme with a Sagnac interferometer h...

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Bibliographic Details
Published inSensors and actuators. A. Physical. Vol. 48; no. 1; pp. 29 - 35
Main Authors Breguet, J., Pellaux, J.P., Gisin, N.
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 01.05.1995
Elsevier Science
Subjects
Analytical chemistry
Chemistry
Exact sciences and technology
General equipment and techniques
General, instrumentation
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Optical microphones
Photoacoustics
Physics
Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
Trace gas detection
Optical microphones
Trace gas detection
Photoacoustics
Trace analysis
Optical fibers
Michelson interferometer
Experimental study
Gas detector
Photoacoustic effect
Microphones
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Summary:An alternative to the electrical microphone for photoacoustic detection of trace gases is presented. This new microphone is made of standard monomode optical fibers wound and glued on a thin plate and is one of the arms of a Michelson interferometer. A detection scheme with a Sagnac interferometer has also been used and has given better results. Three cells working with different resonance modes and different microphone configurations have been tested.
ISSN:0924-4247
1873-3069
DOI:10.1016/0924-4247(95)00848-9