Strain-rate sensor based on in-fiber Doppler velocimetry

Yu-Lung Lo; James S. Sirkis

doi:10.1117/12.207686

20 April 1995 Strain-rate sensor based on in-fiber Doppler velocimetry

Yu-Lung Lo, James S. Sirkis

Proceedings Volume 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation; (1995) https://doi.org/10.1117/12.207686
Event: Smart Structures and Materials '95, 1995, San Diego, CA, United States

Abstract

An optical fiber strain-rate sensor based on in-line Doppler velocimetry is developed using a 3 X 3 coupler with a large path imbalance Mach-Zehnder interferometer for passive demodulation of Doppler wavelength shifts. A model is developed that relates the strain-rate in an optical fiber to the corresponding Doppler wavelength shifts. The strain-rate obtained by differentiating strain from a Michelson strain sensor mounted on the PZT cylinder shows good agreement with the strain-rate directly obtained from the Doppler-based strain-rate sensor.

Citation Download Citation

Yu-Lung Lo and James S. Sirkis "Strain-rate sensor based on in-fiber Doppler velocimetry", Proc. SPIE 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation, (20 April 1995); https://doi.org/10.1117/12.207686

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