Temperature measurements using fiber optic polarization interferometer |
| |
Authors: | Sang Min Jeon Yong Pyung Kim |
| |
Affiliation: | College of Electronics and Information, Institute for Laser Engineering, Kyunghee University, 1 Seochon-ri, Kiheung-eup, Youngin-shi, Kyonggi-do 449-701, South Korea |
| |
Abstract: | A novel measurement method of temperature based on the phenomena that the phase difference between principle polarization states in the optical retarder is function of temperature is described. The polarization state of optical beam is changed as it passes through the optical retarder, which depends on the temperature. The temperature of optical retarder is determined by comparison of the power difference between principal polarization states. We demonstrate successfully the temperature measurement by using a polarization maintaining fiber as the optical retarder. With a 100 mm length of the fiber optic retarder, the change rate of phase difference on temperature was 0.236 rad/°C and the measurement error was ±0.038°C over the temperature range of −2.6 – +3.4°C. With a 11.5 mm length of the fiber optic retarder, the change rate of phase difference on temperature was 0.021 rad/°C and the measurement error was ±0.79°C over the temperature range of −8.5 – +86.5°C. |
| |
Keywords: | Author Keywords: Temperature Sensor Retarder Fiber Polarization Interferometer |
本文献已被 ScienceDirect 等数据库收录! |
|