AN OPTICAL FIBER TEMPERATURE SENSOR BASED ON AN ETHANOL FILLED FABRY-PEROT CAVITY |
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| Authors: | Riqing Lv Qi Wang |
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| Affiliation: | 1. College of Information Science and Engineering , Northeastern University , Shenyang , China;2. College of Information Science and Engineering , Northeastern University , Shenyang , China;3. State Key Laboratory of Synthetical Automation for Process Industries (Northeastern University) , Shenyang , China |
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| Abstract: | Optical fiber Fabry-Perot interferometers have been widely used as sensors. A novel anhydrous ethanol-filled optical fiber Fabry-Perot temperature sensor was reported in this article. Based on the characteristics of the temperature-controlling refractive index, the ethanol may serve as a sensitive medium for a sensor. According to the experimental results, the refractive index of the ethanol was changed by approximately 0.02617 when the temperature increased from 16°C to 74°C. A cavity length of 94 μm was used to demonstrate the feasibility of this sensor. The resonance wavelength of the sensor shifted about ?0.42 nm/°C. The novel optical fiber Fabry-Perot temperature sensor was simple, compact, sensitive, and immune to electromagnetic interferences. |
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| Keywords: | alcohol interferometer optical fiber Fabry-Perot sensor temperature sensor |
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