A hybrid Sagnac interferometer for discrimination of ambient index and temperature

Oh-Jang Kwon; Young Bo Shim; Young-Geun Han

doi:10.1117/12.884467

17 May 2011 A hybrid Sagnac interferometer for discrimination of ambient index and temperature

Oh-Jang Kwon, Young Bo Shim, Young-Geun Han

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77531C (2011) https://doi.org/10.1117/12.884467
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

A hybrid Sagnac interferometer with a D-shaped polarization maintaining fiber (PMF) and a fiber Bragg grating (FBG) is proposed and experimentally demonstrated for simultaneous measurement of ambient index and temperature. Since the core mode of the locally D-shaped PMF is directly interfaced to the external environment, the interference pattern of the D-shaped-PMF-based Sagnac interferometer is immediately changed by the variation of external index and temperature. The resonant wavelength of the FBG, however, responds only to the temperature change. Therefore, it is possible to discriminate ambient index and temperature sensitivities by using the proposed hybrid Sagnac interferometer.

Citation Download Citation

Oh-Jang Kwon, Young Bo Shim, and Young-Geun Han "A hybrid Sagnac interferometer for discrimination of ambient index and temperature", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77531C (17 May 2011); https://doi.org/10.1117/12.884467

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