Polarimetric Optical Fiber Pressure Sensor With Low Temperature Effects

In order to measure with high resolution a parameter such as the temperature or the pressure, the interferometric optical fibers sensors (O.F.S.) have been proposed during the last years {1}. While the resolution is quite good, they present the disadvantage of a reference arm in which perturbations can occur. Such situations appear in the Mach-Zehnder or in the Michelson optical fiber configuration but not in the Fabry-Perot configuration {2} in which the two arms are in the same fiber. Other configurations using single-mode fiber in which the external parameter modifies the evolution of the state of polarization (S.O.P.) have been developped in connection with interferometric O.F.S. {3}.