Fiber-optic sensors are described that utilize the mode–mode interference of the two orthogonal linear polarizations of the HE11 mode in strongly birefringent single-mode fibers. The sensitivities of various versions of these one-fiber interferometers are calculated. When fibers with high internal stress are used, the temperature sensitivity is reduced by only a factor of 50 compared with that of two-fiber interferometers while the pressure sensitivity is reduced by 7.3 × 103. Thus the cross sensitivity is reduced by a factor of 150.
© 1981 Optical Society of America
Original Manuscript: January 15, 1981
Published: April 1, 1981
W. Eickhoff, "Temperature sensing by mode–mode interference in birefringent optical fibers," Opt. Lett. 6, 204-206 (1981)