A dual-eigenstate polarization preserving fiberoptic sensor

A dual-eigenstate polarization preserving fiberoptic sensor is tested, in which each eigenstate in a polarization preserving fiber forms an interferometer which could measure the temperature and the strain simultaneously. The temperature and strain coefficients for different polarization fibers are measured at the room temperature, indicating that there exist differences in temperature coefficients between two eigenstates in a polarization preserving fiber. The different temperature effects from those eigenstates make it possible to perform the temperature measurement and/or temperature compensation.