Review of Optical Humidity Sensors

Xing Rao; Lin Zhao; Lukui Xu; Yuhang Wang; Kuan Liu; Ying Wang; George Y Chen; Tongyu Liu; Yiping Wang

doi:10.3390/s21238049

Review of Optical Humidity Sensors

Sensors (Basel). 2021 Dec 1;21(23):8049. doi: 10.3390/s21238049.

Authors

Xing Rao^{1

2}, Lin Zhao³, Lukui Xu^{1

2}, Yuhang Wang^{1

2}, Kuan Liu^{1

2}, Ying Wang^{1

2}, George Y Chen^{1

2}, Tongyu Liu³, Yiping Wang^{1

2}

Affiliations

¹ Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/GuangDong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
² Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things, Guangdong and Hong Kong Joint Research Centre for Optical Fibre Sensors, Shenzhen University, Shenzhen 518060, China.
³ Laser Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.

Abstract

Optical humidity sensors have evolved through decades of research and development, constantly adapting to new demands and challenges. The continuous growth is supported by the emergence of a variety of optical fibers and functional materials, in addition to the adaptation of different sensing mechanisms and optical techniques. This review attempts to cover the majority of optical humidity sensors reported to date, highlight trends in design and performance, and discuss the challenges of different applications.

Keywords: RH; humidity; hygrometer; moisture; optical fiber; review.

Publication types

Review

MeSH terms

Humidity
Optical Fibers*