Miniature photonic crystal optical fiber humidity sensor based on polyvinyl alcohol

Wei Chang Wong; Chi Chiu Chan; Tao Li; Li Han Chen; Jia Liang Boo; Kok Xian Lee; Kam Chew Leong

doi:10.1117/12.975104

7 November 2012 Miniature photonic crystal optical fiber humidity sensor based on polyvinyl alcohol

Wei Chang Wong, Chi Chiu Chan, Tao Li, Li Han Chen, Jia Liang Boo, Kok Xian Lee, Kam Chew Leong

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84216C (2012) https://doi.org/10.1117/12.975104
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

A compact photonic crystal fiber (PCF) humidity sensor based on modal interference has been proposed by the use of commercial fusion splicer to collapse the holes of PCF to form a Michelson interferometer with cladding mode excitation at the fiber tip. The sensor is then dipped coated in polyvinyl alcohol to make it sensitive to humidity. The shift of the interference fringes was measured when the sensor was placed in a humidity chamber of varying humidity. High sensitivity was obtained when the relative humidity is above 50% RH as an exponential relation of relative humidity and interference shift was established.

Citation Download Citation

Wei Chang Wong, Chi Chiu Chan, Tao Li, Li Han Chen, Jia Liang Boo, Kok Xian Lee, and Kam Chew Leong "Miniature photonic crystal optical fiber humidity sensor based on polyvinyl alcohol", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84216C (7 November 2012); https://doi.org/10.1117/12.975104

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