Temperature measurements using fiber optic polarization interferometer

Sensitive birefringent temperature sensor based on a waveguide ring resonator

“…A high degree of common rejection is thereby obtained for external forces. A measurement error of 0.076°C was reported over a small temperature range of 6°C [10]. As a two-beam interferometer, its finesse is as low as 2.…”

“…Varieties of optical effects have been used to sense temperature, including gratings [6], passive and active Fabry-Perot cavities [7,8], Mach-Zehnder interferometers [9], and the optical birefringence effect [10,11]. Among these, a birefringent thermometer is implemented by using a single-fiber polarization interferometer, which is similar to a Mach-Zehnder one, but integrates its two "arms" in one fiber.…”

New electro-optic sensor architecture for temperature measurements

“…This sensor is based on the birefringent variation of an optical material. This pheno mena is well-known and often exploited for electric field measurements [1, 2] or temperature measurements [3].…”