Title :
Vibration Fiber Sensors Based on SM-NC-SM Fiber Structure
Author :
Yanli Ran ; Li Xia ; Ya Han ; Wei Li ; Rohollahnejad, Jalal ; Yongqiang Wen ; Deming Liu
Author_Institution :
Sch. of Opt. & Electron. Inf., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
A novel vibration sensor based on the single mode (SM)-no core (NC)-SM fiber structure is proposed and experimentally sensing results demonstrated. By numerical simulation, we use an NC fiber (NCF) as the multimode waveguide structure for the multimode interference (MMI) sensing. Through intensity demodulation, the vibration sensing structure can detect continuous vibration disturbances with the frequencies of ranging from 100 Hz to 29 kHz and the inherent frequency of cantilever slab of 700 Hz. The frequency sensing resolution is 1 Hz in real-time monitoring. The proposed compact structure is easy to fabricate and has low cost.
Keywords :
cantilevers; fibre optic sensors; light interference; vibration measurement; SM-NC-SM fiber structure; cantilever slab; continuous vibration disturbances; frequency 100 Hz to 29 kHz; frequency sensing resolution; inherent frequency; intensity demodulation; multimode interference sensing; multimode waveguide structure; numerical simulation; single-mode-no-core-single-mode fiber structure; vibration fiber sensors; Frequency measurement; Interference; Optical fiber sensors; Optical fibers; Vibrations; Intensity demodulation; No core fiber; No core fiber (NCF); Vibration sensing; intensity demodulation; vibration sensing;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2015.2408436
