Dual fiber-optic Fabry-Perot interferometer strain sensor with low-cost light-emitting diode light source

Mu-Chun Wang; Zhen-Ying Hsieh; Heng-Sheng Huang; Jon-En Wang

doi:10.1117/1.2943192

1 June 2008 Dual fiber-optic Fabry-Perot interferometer strain sensor with low-cost light-emitting diode light source

Mu-Chun Wang, Zhen-Ying Hsieh, Heng-Sheng Huang, Jon-En Wang

Author Affiliations +

Optical Engineering, Vol. 47, Issue 6, 064401 (June 2008). https://doi.org/10.1117/1.2943192

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.

©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Mu-Chun Wang, Zhen-Ying Hsieh, Heng-Sheng Huang, and Jon-En Wang "Dual fiber-optic Fabry-Perot interferometer strain sensor with low-cost light-emitting diode light source," Optical Engineering 47(6), 064401 (1 June 2008). https://doi.org/10.1117/1.2943192

Published: 1 June 2008

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KEYWORDS

Sensors

Light emitting diodes

Signal detection

Light sources

Fiber optics sensors

Modulation

Fabry–Perot interferometry

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