Abstract

We propose a side-hole polarization-maintaining photonic crystal fiber (PM-PCF) with ultrahigh polarimetric sensitivity to hydrostatic pressure. The proposed fiber has a very simple structure with a core surrounded by a double row of large air holes and a central row of small air holes. A pair of ultralarge side holes was symmetrically introduced into the silica cladding of the fiber to enhance the polarimetric response to hydrostatic pressure. Modal birefringence $B$ as large as $2.34 \times 10^{-3}$ and polarimetric pressure sensitivity $dB/dp$ as high as $-2.30 \times 10^{-5}$ MPa$^{- 1}$ were achieved at 1.55 $\mu$m for the proposed fiber. Combining the advantages of both side-hole fibers and PM-PCFs, it is believed to be an excellent candidate for future applications of hydrostatic pressure measurement.

© 2011 IEEE

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