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Simultaneous refractive index and temperature measurements using a tapered bend-resistant fiber interferometer

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Abstract

Simultaneous measurements of refractive index (RI) and temperature are proposed and experimentally demonstrated by using a tapered bend-resistant fiber interferometer. Different phase shifts of an inner and outer cladding mode of the fiber interferometer are measured to determine the temperature compensated RI of a glycerol solution. The temperature coefficients of the inner and outer cladding modes are 0.0253rad/°C and 0.0523rad/°C, and the RI coefficients are 4.0403rad/RIU and 44.823rad/RIU, respectively. The minimum errors of temperature and RI are 0.6°C and 0.001 RIU, respectively.

© 2012 Optical Society of America

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