Ultrahigh sensitive twist sensor employing Sagnac interferometer based on PM-elliptical core fibers

Binbin Song; Bo Liu; Wei Lin; Yinping Miao; Hao Zhang; Jixuan Wu; Haifeng Liu; Donglin Yan

doi:10.1117/12.2190828

28 September 2015 Ultrahigh sensitive twist sensor employing Sagnac interferometer based on PM-elliptical core fibers

Binbin Song, Bo Liu, Wei Lin, Yinping Miao, Hao Zhang, Jixuan Wu, Haifeng Liu, Donglin Yan

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 963453 (2015) https://doi.org/10.1117/12.2190828
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

An ultrasensitive optical fiber twist sensor is proposed by employing a Sagnac interferometer based on polarization-maintaining elliptical core fibers (PM-ECFs). The twist effects are theoretically analyzed and experimentally demonstrated. Based on the photoelastic effect, the wavelength shift in response to twist rate turns out linear tendency and is torsion-direction-dependent. The maximum torsion sensitivity reaches 18.59593nm/(rad/m) (or 0.67582nm/°) for clockwise (CW) torsion direction and 15.83073nm/(rad/m) for anticlockwise (ACW) torsion direction, respectively. Furthermore, it is further improved up to 1.675 nm/° by rotating two ends of PM-ECF simultaneously. The prominent advantage of ultrasensitivity keep it meritorious in the applications of spaceflight and constructional engineering.

Citation Download Citation

Binbin Song, Bo Liu, Wei Lin, Yinping Miao, Hao Zhang, Jixuan Wu, Haifeng Liu, and Donglin Yan "Ultrahigh sensitive twist sensor employing Sagnac interferometer based on PM-elliptical core fibers", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963453 (28 September 2015); https://doi.org/10.1117/12.2190828

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