Abstract
We describe the use of an optical fiber reflection two-wave interferometer as a temperature sensor. As it uses only one fiber this device is easy to set up. We calculate its sensitivity based on the temperature rate of change of the refractive index and length of the fiber, for the case of pure silica. The measured sensitivity, equal to 73 fringes/°C for a 1 m long fiber, is slightly higher than the theoretical value. This result is in agreement with the expected increase in the thermal expansion and thermo-optic coefficients of doped silica.
Published Version
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