Optical fibre temperature sensor based on thermochromic liquid crystal

Chenyang He; S. Korposh; R. Correia; B. R. Hayes-Gill; S. P. Morgan

doi:10.1117/12.2539566

28 August 2019 Optical fibre temperature sensor based on thermochromic liquid crystal

Chenyang He, S. Korposh, R. Correia, B. R. Hayes-Gill, S. P. Morgan

Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 1119908 (2019) https://doi.org/10.1117/12.2539566
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

Abstract

An optical fibre temperature sensor modified with coating a thermochromic liquid crystal (TLC) film on the tip of fibre is reported. The interrogation is conducted in the wavelength domain using a CCD spectrometer and halogen light source. The TLC sensor shows a reversible wavelength shift of the reflective light peak in the detected temperature range (28 – 46°C). The response of the sensor to temperature was linear with a sensitivity of -4.52 nm/°C for temperature increasing and -4.60 nm/°C for decreasing. There is no measurable hysteresis in the temperature calibration experiment for TLC sensor.

Citation Download Citation

Chenyang He, S. Korposh, R. Correia, B. R. Hayes-Gill, and S. P. Morgan "Optical fibre temperature sensor based on thermochromic liquid crystal", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 1119908 (28 August 2019); https://doi.org/10.1117/12.2539566

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