The sensitivity to hydrostatic pressure, temperature, and strain of elliptical-core, D-shaped, bow-tie highly birefringent fibers is experimentally investigated. Both polarimetric and polarization sensitive LP01–LP11 intermodal interferometric responses are studied. The sensitivities are expressed in terms of the experimental parameters Tχ,j describing a 2π phase shift in the cosine response. It is found that bow-tie fibers exhibit a linear response to all the studied external perturbations except for the polarimetric response of the fundamental mode to temperature, while elliptical-core and D-shaped fibers are characterized by a nonlinear sensitivity to both temperature and hydrostatic pressure. The application to fiber-optic sensors of each type of fiber is discussed.
© 1993 Optical Society of America
Original Manuscript: July 16, 1993
Published: November 15, 1993
Wojtek J. Bock and Tinko A. Eftimov, "Polarimetric and intermodal interference sensitivity to hydrostatic pressure, temperature, and strain of highly birefringent optical fibers," Opt. Lett. 18, 1979-1981 (1993)