An optical fiber humidity sensor based on optical absorption

Biao Wang; Fujun Zhang; Fufei Pang; Tingyun Wang

doi:10.1117/12.904443

29 November 2011 An optical fiber humidity sensor based on optical absorption

Biao Wang, Fujun Zhang, Fufei Pang, Tingyun Wang

Proceedings Volume 8311, Optical Sensors and Biophotonics III; 83112A (2011) https://doi.org/10.1117/12.904443
Event: SPIE/OSA/IEEE Asia Communications and Photonics, 2011, Shanghai, China

Abstract

A simple optical fiber relative humidity (RH) sensor was proposed and demonstrated. The humidity sensor was fabricated by coating moisture-sensitive film on the end face of a multi-mode optical fiber. The film was synthesized by doping CoCl₂ into a PVA/SiO₂ composite solution. Based on an optical absorption technique, the sensor head was characterized. From the optical absorption, a relative humidity range of 25%~65% was detected. Furthermore, the sensor has good repetitive response, and the response time was less than 2 min.

Citation Download Citation

Biao Wang, Fujun Zhang, Fufei Pang, and Tingyun Wang "An optical fiber humidity sensor based on optical absorption", Proc. SPIE 8311, Optical Sensors and Biophotonics III, 83112A (29 November 2011); https://doi.org/10.1117/12.904443

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