The acoustic pressure sensitivities of hollow-core photonic bandgap fibers (HC-PBFs) with different thicknesses of silica outercladding and polymer jacket were experimentally investigated. Experiment with a HC-PBF with 7 ìm-thick silica outer cladding and 100 ìm-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.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics