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Proceedings Paper

A hybrid Sagnac interferometer for discrimination of ambient index and temperature
Author(s): Oh-Jang Kwon; Young Bo Shim; Young-Geun Han
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Paper 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.

Paper Details

Date Published: 17 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77531C (17 May 2011); doi: 10.1117/12.884467
Show Author Affiliations
Oh-Jang Kwon, Hanyang Univ. (Korea, Republic of)
Young Bo Shim, Hanyang Univ. (Korea, Republic of)
Young-Geun Han, Hanyang Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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