Abstract
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.
Original language | English |
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Journal | I E E E Photonics Technology Letters |
Volume | 29 |
Issue number | 7 |
Pages (from-to) | 575-578 |
ISSN | 1041-1135 |
DOIs | |
Publication status | Published - 2017 |
Keywords
- Fiber gratings
- Temperature measurement
- Optical fiber sensors
- Annealing
- Humidity measurement
- Plastic optical fiber