The temperature sensitivity of Sagnac loop interferometer based on polarization maintaining side-hole fiber

Abstract

The temperature sensitivity of modal birefringence (dB/dT) of different types of polarization-maintaining fibers with side holes was measured using a Sagnac loop interferometer. The thermal expansion coefficient can be varied by controlling the amount of germanium doped in the core region. Using this method, dB/dT could be made higher (similar to 10(-7)/degrees C) than that of standard PMFs (similar to 10(-8)/degrees C) or comparable to that of standard PMFs (similar to 10(-9)/degrees C). (C) 2007 Optical Society of America