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Curvature sensor based on low-birefringence photonic crystal fiber Sagnac loop

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4 Author(s)
Huaping Gong ; Institute of Optoelectronic Technology, China Jiliang University, Hangzhou city, China, 310018 ; Chi Chiu Chan ; Lihan Chen ; Xinyong Dong

A fiber optic curvature sensor with low-birefringence photonic crystal fiber (PCF) based Sagnac loop is demonstrated experimentally. The low-birefringence PCF is about 40cm long, using as the sensing element. The Sagnac output spectra under different curvatures are measured and analyzed. When the curvature is varied from 0 to 9.9m-1, the total wavelength shift is about 3.3nm, and it has a linear relationship with the curvature. The curvature sensitivity of about -0.337nm/m-1 is achieved.

Published in:

Photonics Global Conference (PGC), 2010

Date of Conference:

14-16 Dec. 2010