24 September 1996 Practical birefringent fiber Sagnac ring force sensor
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Proceedings Volume 2895, Fiber Optic Sensors V; (1996); doi: 10.1117/12.252129
Event: Photonics China '96, 1996, Beijing, China
Abstract
A practical birefringent fiber Sagnac ring force sensor has been demonstrated. The sensor is based on the frequency modulation continuous wave technique and simply consists of a birefringent fiber ring. The intensity and the location of a stress applied to the fiber can be determined simultaneously by detecting the amplitude and the frequency of the beat signal which is produced by two forward-coupled mode beams in the Sagnac ring as a result of the applied stress. Similarly, the strain variation of one section of the fiber ring can also be measured by analyzing the phase shift of this beat signal. The experiments demonstrate that resolutions of 1 meter for distributed stress measurements and 4 microstrains for strain measurements can be obtained with this sensor system.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gang Zheng, Michael Campbell, Peter A. Wallace, Sheila Smith, "Practical birefringent fiber Sagnac ring force sensor", Proc. SPIE 2895, Fiber Optic Sensors V, (24 September 1996); doi: 10.1117/12.252129; https://doi.org/10.1117/12.252129
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KEYWORDS
Sensors

Semiconductor lasers

Beam splitters

Phase shifts

Polarization

Signal detection

Frequency modulation

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