DAS over 1,007-km hybrid link with 10-Tb/s DP-16QAM co-propagation using frequency-diverse chirped pulses

E Ip, YK Huang, MF Huang, F Yaman… - Journal of Lightwave …, 2022 - ieeexplore.ieee.org
E Ip, YK Huang, MF Huang, F Yaman, G Wellbrock, T Xia, T Wang, K Asahi, Y Aono
Journal of Lightwave Technology, 2022ieeexplore.ieee.org
We report the first distributed acoustic sensing (DAS) experiment with over> 1,000 km reach
on a hybrid link comprising of a mixture of field and lab fibers with bi-directional inline
Raman amplification after each span. We used 20× frequency-diversity chirped-pulses for
the probe signal, and recovered the Rayleigh backscatter using a coherent receiver with
correlation detection and diversity combining. A measurand resolution of∼ 100 at a gauge
length of 20 meters achieved in the offline experiment. We also demonstrate the first real …
We report the first distributed acoustic sensing (DAS) experiment with over >1,000 km reach on a hybrid link comprising of a mixture of field and lab fibers with bi-directional inline Raman amplification after each span. We used 20× frequency-diversity chirped-pulses for the probe signal, and recovered the Rayleigh backscatter using a coherent receiver with correlation detection and diversity combining. A measurand resolution of ∼100 at a gauge length of 20 meters achieved in the offline experiment. We also demonstrate the first real-time FPGA implementation of chirped-pulse DAS without frequency diversity over a range of 210 km.
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