Abstract
This work describes a novel relative humidity sensing device based on photonic crystal colloids auto-assembled directly on the tip of a multi-mode optical fiber via a vertical dip-coating deposition technique. Specifically, the photonic crystal colloids are periodically-structured nano-spheres chemically formed by a polystyrene (PS) core incorporated into a hydrogel shell. The hydrogel shell swells after the water absorption depending on the relative humidity and the reflectance spectrum of the proposed devices changes in terms of wavelength shift and amplitude of the reflected resonant peak. Here spectral characterization and sensing analysis of the probe is presented and discussed. Maximum sensitivity around 6 nm/RH% is found.
© 2018 The Author(s)
PDF ArticleMore Like This
Liwei Wang, Dongsheng Tu, Xianhui Mao, Min Zhang, and Yanbiao Liao
TuE38 Optical Fiber Sensors (OFS) 2006
Siqi Hu, Guofeng Yan, Chunzhou Wu, and Sailing He
Th3L.2 Conference on Lasers and Electro-Optics/Pacific Rim (CLEO/PR) 2018
Tao Li, Chun-Liu Zhao, Xinyong Dong, Wenwen Qian, Yongxing Jin, and Shangzhong Jin
79900G Asia Communications and Photonics Conference and Exhibition (ACP) 2010