Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7927846 | Optics Communications | 2016 | 5 Pages |
Abstract
The study on strain distribution of a thin-wall ring is presented and a bandwidth-demodulated displacement sensor based on a fiber Bragg grating (FBG) is proposed. The FBG is glued onto the inner surface of a spring steel ring, and it is found that its bandwidth is linearly changed with the displacement variation of the top point of the ring due to the ring-compression-induced gradient strain. The PD output responses of different grating lengths to the same dimension of the ring are investigated. Experimental results show that the high sensitivity and accuracy of 0.567 nm mmâ1 and ±0.04 mm using 10 mm grating is achieved within a displacement range of 0-3.5 mm. The designed structure has a higher 3dB-bandwidth tuning ratio of 0.057 nm mmâ2. A temperature stability better than ±0.02 mm over the temperature range from 0 to 60 °C is demonstrated.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Sicong Tao, Xiaopeng Dong, Bowen Lai,