| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7133022 | Optics and Lasers in Engineering | 2014 | 5 Pages |
Abstract
A novel humidity sensor based on an in-fiber Mach-Zehnder interferometer (MZI) is proposed and demonstrated. The sensor head is formed by a single-mode-multimode-single-mode (SM-MM-SM) fiber structure through arc fusion splicing. The intermodal interference is achieved by two waist-enlarged fiber tapers at the coupling points of the multimode fiber and single-mode fibers. The sensor has a linear response to humidity with enhanced sensitivity of â0.119Â dB/%RH in the range of 35-90%RH. Additionally, the sensor exhibited excellent temperature immunity in the temperature test. Such easily fabricated, cost-effective and temperature-immune fiber interferometer could be used for high sensitivity humidity sensing applications.
Related Topics
Physical Sciences and Engineering
Engineering
Electrical and Electronic Engineering
Authors
Min Shao, Xueguang Qiao, Haiwei Fu, Huidong Li, Jianlin Zhao, Yan Li,