Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 40, Issue 13, Pages 4458-4466Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2022.3158074
Keywords
Sensors; Spatial resolution; Multiplexing; Photonics; Temperature sensors; Optical fiber sensors; Fiber gratings; Dense temporal multiplexed FBG sensing; dual-wavelength differential interrogation; single-photon detection; superconducting nanowire single-photon detector
Funding
- National Key Research and Development Program of China [2018YFA0307400]
- National Natural Science Foundation of China [61775025, 61405030]
- China Postdoctoral Science Foundation [2020M673178]
- Sichuan Science and Technology Program [2020JDR0397, 2021YFSY0066, 2022YFG0080]
Ask authors/readers for more resources
In this paper, a dense temporal multiplexed FBG sensing scheme with single-photon detection is proposed and demonstrated. The experimental results show that using the dual-wavelength differential detection method can achieve high wavelength resolution and corresponding temperature resolution.
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 mu m. 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 degrees C, which could be further improved to 0.01 degrees C by increasing the repetition rate of laser pulse.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available