Abstract

A fiber-optic Fabry–Perot interferometer was constructed by splicing a short length of photonic crystal fiber to a standard single-mode fiber. The photonic crystal fiber functions as a Fabry–Perot cavity and serves as a direct sensing probe without any additional components. Its pressure and temperature responses in the range of 0–$40\mathrm{MPa}$ and $25°\mathrm{C}$–$700°\mathrm{C}$ were experimentally studied. The proposed sensor is easy to fabricate, potentially low- cost, and compact in size, which makes it very attractive for high-pressure and high-temperature sensing applications.

© 2011 Optical Society of America

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