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Opt Express. 2013 Jul 1;21(13):15514-21. doi: 10.1364/OE.21.015514.

Enhancement of acoustic sensitivity of hollow-core photonic bandgap fibers.

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  • 1Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China.


The acoustic pressure sensitivities of hollow-core photonic bandgap fibers (HC-PBFs) with different thicknesses of silica outer-cladding and polymer jacket were experimentally investigated. Experiment with a HC-PBF with 7 μm-thick silica outer cladding and 100 μm-thick Parylene C jacket demonstrated a pressure sensitivity 10 dB higher than the commercial HC-1550-02 fiber and 25 dB higher than a standard single mode fiber. The significant enhancement in sensitivity would simplify the design of fiber hydrophone arrays and increase the number of sensors that could be multiplexed in a single fiber.

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