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Proceedings Paper

Frequency response of a polarization-maintaining optical fiber interferometer for simultaneous measurement of strain and temperature
Author(s): Bornain Chiu; Mardi C. Hastings
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Paper Abstract

Two different demodulation schemes, heterodyne and passive homodyne, were used to determine the frequency response of a polarization-maintaining (PM) optical fiber Mach- Zehnder interferometer for simultaneous measurement of axial strain and temperature. A symmetric 3 by 3 coupler was used to construct the passive homodyne configuration. The heterodyne setup consisted of two acousto-optically modulated lightwaves combined in a 2 by 1 PM fiber coupler. The intensity output of the coupler was demodulated using a digital lock- in amplifier. For a sensing fiber length of 0.54 meters, the frequency response to an axial load was flat up to 2 kHz. A simple rigid rod model of the fiber was developed to estimate the dynamic response.

Paper Details

Date Published: 18 August 1995
PDF: 10 pages
Proc. SPIE 2622, Optical Engineering Midwest '95, (18 August 1995); doi: 10.1117/12.216817
Show Author Affiliations
Bornain Chiu, The Ohio State Univ. (United States)
Mardi C. Hastings, The Ohio State Univ. (United States)


Published in SPIE Proceedings Vol. 2622:
Optical Engineering Midwest '95
Rudolph P. Guzik, Editor(s)

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