Back to Search
Start Over
Dense Temporally Multiplexed Fiber Bragg Grating Sensing Based on Single-Photon Detection.
- Source :
- Journal of Lightwave Technology; 7/1/2022, Vol. 40 Issue 13, p4458-4466, 9p
- Publication Year :
- 2022
-
Abstract
- Temporal multiplexed fiber Bragg grating (FBG) sensing system for detecting physical parameters with a high spatial resolution is desirable for applications such as structure health monitoring, oil and gas exploration, geophysical research, etc. However, due to the trade-off between bandwidth and sensitivity of the linear photodetection, the wavelength resolution of dense temporally multiplexed FBG sensing system is severely affected under a spatial resolution of centimeters. In this paper, we propose and demonstrate a dense temporal multiplexed FBG sensing scheme with single-photon detection at 1.5 μm. A proof-of-principle demonstration is implemented by using three FBG sensors spliced along a piece of fiber. The spatial resolution can reach 5.0 cm which is determined by a time jitter of superconducting nanowire single-photon detector and a pulse width of laser. In our experiment, by using the dual-wavelength differential detection method, a wavelength resolution of 0.5 pm over a range of 550 pm is obtained with a corresponding temperature resolution of 0.05 °C, which could be further improved to 0.01 °C by increasing the repetition rate of laser pulse. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 07338724
- Volume :
- 40
- Issue :
- 13
- Database :
- Complementary Index
- Journal :
- Journal of Lightwave Technology
- Publication Type :
- Academic Journal
- Accession number :
- 158649330
- Full Text :
- https://doi.org/10.1109/JLT.2022.3158074