Microwave Interrogated Large Core Fused Silica Fiber Michelson Interferometer for Strain Sensing
A Michelson-type large core optical fiber sensor has been developed, which is designed based on the optical carrier- based microwave interferometry technique, and fabricated by using two pieces of 200-µm diameter fused silica core fiber as two arms of the Michelson interferometer. The interference fringe pattern caused by the optical path difference of the two arms is interrogated in the microwave domain, where the fringe visibility of 40 dB has easily been obtained. The strain sensing at both room temperature and high temperatures has been demonstrated by using such a sensor. Experimental results show that this sensor has a linear response to the applied strain, and also has relatively low temperature-strain cross talk. The dopant-free quality of the fused silica fiber provides high possibility for the sensor to have promising strain sensing performance in a high temperature environment.
L. Hua et al., "Microwave Interrogated Large Core Fused Silica Fiber Michelson Interferometer for Strain Sensing," Applied Optics, vol. 54, no. 24, pp. 7181-7187, Optical Society of America, Aug 2015.
The definitive version is available at http://dx.doi.org/10.1364/AO.54.007181
Electrical and Computer Engineering
United States. Department of Energy
National Science Foundation (U.S.)
Keywords and Phrases
Crosstalk; Fibers; Interferometers; Interferometry; Michelson interferometers; Microwave sensors; Optical fiber fabrication; Optical fibers; Silica; Temperature; Visibility, Fringe visibilities; Fused-silica fibers; High-temperature environment; Interference fringe pattern; Microwave interferometries; Optical fiber sensor; Optical path difference; Silica core fiber, Fused silica
International Standard Serial Number (ISSN)
Article - Journal
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