Abstract
Distributed optical fiber strain sensing significantly increases the number of sensing points compared with fiber Bragg grating sensor, which makes it an excellent candidate for shape sensing. Theoretical analysis indicates that the spatial resolution of strain measurement is crucial to the performance of shape sensing, so a shape sensor based on differential pulse-width-pair Brillouin optical time-domain analysis is proposed to improve the spatial resolution and shape sensing performance. The sensing fiber is attached on the both sides of a steel strip substrate, which enables the measurement of Brillouin frequency shifts (BFSs) of both the sides to suppress temperature crosstalk. In the experiment, first, the dependence of BFS variation on the curvature of the fiber is measured, the result of which agrees well with theory. Then the reconstruction of three shapes are demonstrated, the spatial resolution of which is 10 cm.
| Original language | English |
|---|---|
| Article number | 8219402 |
| Journal | IEEE Photonics Journal |
| Volume | 10 |
| Issue number | 1 |
| DOIs | |
| State | Published - Feb 2018 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2017 IEEE.
Funding
Manuscript received August 24, 2017; revised November 29, 2017; accepted December 12, 2017. Date of publication December 18, 2017; date of current version January 11, 2018. This work was supported in part by the NSF of China under Grant 61605034, Grant 61308004, and Grant 61575052, in part by the China Postdoctoral Science Foundation under Grant 2016M591531, in part by the Postdoctoral Foundation of Heilongjiang Province under Grant LBH-Z15076, in part by the National Key Laboratory Funds for National Key Laboratory of Science and Technology on Tunable Laser, in part by the Fundamental Research Funds for the Central Universities under Grant NSRIF 2015041, in part by the National Key Scientific Instrument and Equipment Development Project of China under Grant 2013YQ040815 and Grant 2017YFF0108700. Corresponding author: Yongkang Dong (e-mail: [email protected]).
| Funders | Funder number |
|---|---|
| Heilongjiang Postdoctoral Science Foundation | LBH-Z15076 |
| National Natural Science Foundation of China | 61308004, 61605034, 61575052 |
| China Postdoctoral Science Foundation | 2016M591531 |
| National Key Laboratory of Science and Technology on Communications | |
| National Key Scientific Instrument and Equipment Development Projects of China | 2017YFF0108700, 2013YQ040815 |
| Fundamental Research Funds for the Central Universities | NSRIF 2015041 |
Keywords
- Brillouin optical time-domain analysis
- Fiber-optic shape sensor
- differential pulse-width pair
- temperature-insensitive.