Abstract
It is demonstrated that Fabry-Perot (FP) cavities with birefringent fibers can be used as polarimetric sensors without analyzers. Results of theoretical and experimental investigations of the cavities are described. An FP cavity has been constructed on low-birefringent single-mode fiber. Al mirrors were deposited onto fiber ends and became an integral part of the fiber. With a cavity finesse of 4, fringes corresponding to two sets of cavity modes were observed. The transmitted signal was fed directly to a photodetector. From the observed fringes η was measured as a function of stress to the fiber. Also shown is a least-squares fit line. From the line, a stress sensitivity of -27.6°/N is obtained for jacketed fibers and -74.7°/N for unjacketed fibers. The corresponding theoretical values are -24.9 and -71.9°/N, respectively.