Low Loss Polycarbonate Polymer Optical Fiber for High Temperature FBG Humidity Sensing

We report the fabrication and characterization of a polycarbonate (PC) microstructured polymer optical fiber (mPOF) Bragg grating (FBG) humidity sensor that can operate beyond 100°C. The PC preform, from which the fiber was drawn, was produced using an improved casting approach to reduce the attenua...

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Bibliographic Details
Published in:IEEE photonics technology letters 2017-04, Vol.29 (7), p.575-578
Main Authors: Woyessa, Getinet, Fasano, Andrea, Markos, Christos, Rasmussen, Henrik K., Bang, Ole
Format: Article
Language:English
Subjects:
Annealing
Fiber gratings
Humidity
Humidity measurement
Optical fiber sensors
Optical fibers
Plastic optical fiber
Polycarbonate resins
Polymers
Relative humidity
Temperature measurement
Temperature sensors
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Summary:We report the fabrication and characterization of a polycarbonate (PC) microstructured polymer optical fiber (mPOF) Bragg grating (FBG) humidity sensor that can operate beyond 100°C. The PC preform, from which the fiber was drawn, was produced using an improved casting approach to reduce the attenuation of the fiber. The fiber loss was found reduced by a factor of two compared to the latest reported PC mPOF [20], holding the low loss record in PC based fibers. PC mPOFBG was characterized to humidity and temperature, and a relative humidity (RH) sensitivity of 7.31± 0.13 pm/% RH in the range 10-90% RH at 100°C and a temperature sensitivity of 25.86±0.63 pm/°C in the range 20-100 °C at 90% RH were measured.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2017.2668524