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http://dx.doi.org/10.3807/KJOP.2002.13.3.240

Temperature measurements using optical retarder  

전상민 (경희대학교 전자 정보학부/레이저공학연구소)
김용평 (경희대학교 전자 정보학부/레이저공학연구소)
Publication Information
Korean Journal of Optics and Photonics / v.13, no.3, 2002 , pp. 240-244 More about this Journal
Abstract
We proposed a novel temperature sensor based on the phenomena that the phase difference between principal polarization states in an optical retarder is a function of temperature. The polarization state of an optical beam is changed as it passes through the optical retarder, with the change dependent on the temperature. The temperature of the optical retarder is determined by comparison of the power difference between principal polarization states. A temperature sensor was successfully implemented using a polarization maintaining fiber of length 100 mm as the optical retarder. The change rate of phase difference on temperature was 0.236$^{\circ}C$$_{-1}$ and the measurement error was $\pm$0.038$^{\circ}C$ over the temperature region of -2.6$^{\circ}C$~3.4$^{\circ}C$.
Keywords
temperature sensor; polarization interferometry; optical retarder; polarization maintaining optical fiber.;
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