25 October 1996 Single-piece-fiber FMCW remote strain sensor with environment-insensitive lead-in and lead-out fibers
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Abstract
We present a novel optical fiber remote strain sensor which is based on the FMCW technique and consists of only one single piece of single-mode birefringent fiber. The lead-in and lead-out fibers of the sensor, which are simply separated by two polarization mode couplers, are insensitive to environment so that the sensor can remotely detect the strain variation of a distant structure. The advantages of the sensor, such as no fiber junctions, no feedback light, reasonable resolution (4 microstrain), large dynamic measurement range (5000 microstrain) and long length of sensing fiber are demonstrated in this experiment.
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Gang Zheng, Michael Campbell, Peter A. Wallace, A. S. Holmes-Smith, "Single-piece-fiber FMCW remote strain sensor with environment-insensitive lead-in and lead-out fibers", Proc. SPIE 2839, Fiber Optic and Laser Sensors XIV, (25 October 1996); doi: 10.1117/12.255362; https://doi.org/10.1117/12.255362
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