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- W4220996851 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." @default.
- W4220996851 created "2022-04-03" @default.
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- W4220996851 date "2022-07-01" @default.
- W4220996851 modified "2023-10-14" @default.
- W4220996851 title "Dense Temporally Multiplexed Fiber Bragg Grating Sensing Based on Single-Photon Detection" @default.
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- W4220996851 doi "https://doi.org/10.1109/jlt.2022.3158074" @default.
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