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Optical Engineering

Dual fiber-optic Fabry-Perot interferometer strain sensor with low-cost light-emitting diode light source
Author(s): Mu-Chun Wang; Zhen-Ying Hsieh; Heng-Sheng Huang; Jon-En Wang
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Paper Abstract

A prototype strain sensor based on a dual fiber-optic Fabry-Perot interferometer (FFPI) was successfully implemented experimentally. The light source was a low-cost communication light-emitting diode, replacing the expensive laser diode. No costly Faraday isolator was required in this sensing system. The dynamic strain modulation in the sensing part of this setup was performed using a piezoelectric transducer. The interesting dynamic strain signal could be extracted at the optical receiver by optical signal demodulation in the reference FFPI. The temperature variation of the sensing part was simultaneously detected as needed.

Paper Details

Date Published: 1 June 2008
PDF: 6 pages
Opt. Eng. 47(6) 064401 doi: 10.1117/1.2943192
Published in: Optical Engineering Volume 47, Issue 6
Show Author Affiliations
Mu-Chun Wang, Ming Hsing Univ. of Science and Technology (Taiwan)
Zhen-Ying Hsieh, National Taipei Univ. of Technology (Taiwan)
Heng-Sheng Huang, National Taipei Univ. of Technology (Taiwan)
Jon-En Wang, Texas A&M Univ. (United States)

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