Abstract
We present characteristics of Bragg grating imprinted in highly birefringent side-hole fiber. Using specially developed methods we measured spectral sensitivity of the grating (dλ<sub>B</sub>/dX) and the phase sensitivity (dΦ/dX) of the host side-hole fiber to temperature and hydrostatic pressure for each polarization mode. The measurement results for both, the grating and the host fiber, show high difference in responses to pressure and almost identical responses to temperature versus mode polarization. This feature of the Bragg grating imprinted in the side-hole fiber can be potentially used for simultaneous sensing of these two parameters by interrogating wavelength shifts for orthogonally polarized modes. We also present the results of modeling of the phase sensitivities to pressure and temprature for the host side-hole fiber and compare them with experimental values.
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