Large temperature sensitivity of Sagnac loop interferometer based on the birefringent holey fiber filled with metal indium

Abstract

The large temperature sensitivity of the Sagnac loop interferometer based on the birefringent holey fiber filled with metal indium was experimentally demonstrated. The temperature sensitivities of the wavelength shift of the interferometer and the birefringence the fiber with indium were measured to be-6.3 nm/K and-3.3 x 10(-6) /K, respectively. The large temperature sensitivity of the fiber was explained by introduction of the fiber birefringence change originated from the large thermal expansion property of the metal indium at the elevated temperature. (C) 2009 Optical Society of America