Pressure sensor realized with polarization-maintaining photonic crystal fiber-based Sagnac interferometer
Hongyan Fu(Hong Kong Polytechnic University), Hwa‐Yaw Tam(Hong Kong Polytechnic University), Liyang Shao(Hong Kong Polytechnic University), Xinyong Dong(Hong Kong Polytechnic University), P. K. A. Wai(Hong Kong Polytechnic University), Chao Lü(Hong Kong Polytechnic University), Sunil K. Khijwania(Indian Institute of Technology Indore)
Cited by 293Open Access
Abstract
A novel intrinsic fiber optic pressure sensor realized with a polarization-maintaining photonic crystal fiber (PM-PCF) based Sagnac interferometer is proposed and demonstrated experimentally. A large wavelength-pressure coefficient of 3.42 nm/MPa was measured using a 58.4 cm long PM-PCF as the sensing element. Owing to the inherently low bending loss and thermal dependence of the PM-PCF, the proposed pressure sensor is very compact and exhibits low temperature sensitivity.
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