Pressure and temperature effects on beat length in highly birefringent optical fibers

Abstract
The Rayleigh scattering method for beat-length measurement of polarization-maintaining highly birefringent bow-tie optical fibers under high hydrostatic pressure in the range up to 100 MPa and under temperature up to 7OC is presented. The results indicate that the beat length increases with temperature and decreases with hydrostatic pressure, and are in a perfect agreement with a semi-phenomenological formula we introduced recently.

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