Abstract

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 $\mathbf{p}\epsilon /\sqrt {\mathbf{Hz}} $ 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.

Transmission of 1.936 Tb/s (11 × 176 Gb/s) DP-16QAM superchannel signals over 640 km SSMF with EDFA only and 300 GHz WSS channel

Jianqiang Li, Magnus Karlsson, Peter A. Andrekson, and Kun Xu
Opt. Express 20(26) B223-B231 (2012)

Coherent Nyquist optical pulse transmission at nearly 1-Tb/s/λ over 1,600 km with a capacity of 21.5 Tb/s using PS-32 QAM signals

Shohei Beppu, Aoto Ishikawa, Takeki Serikawa, Masato Yoshida, Toshihiko Hirooka, and Masataka Nakazawa
Opt. Express 32(9) 16533-16547 (2024)

1.76Tb/s Nyquist PDM 16QAM signal transmission over 714km SSMF with the modified SCFDE technique

Zhennan Zheng, Rui Ding, Fan Zhang, and Zhangyuan Chen
Opt. Express 21(15) 17505-17511 (2013)

25 Tb/s transmission over 5,530 km using 16QAM at 5.2 b/s/Hz spectral efficiency

J.-X. Cai, H. G. Batshon, H. Zhang, C. R. Davidson, Y. Sun, M. Mazurczyk, D. G. Foursa, O. Sinkin, A. Pilipetskii, G. Mohs, and Neal S. Bergano
Opt. Express 21(2) 1555-1560 (2013)

Coherent O-band WDM transmission of DP-16QAM over a 50-km BDFA-amplified link

Natsupa Taengnoi, Kyle R. H. Bottrill, Yang Hong, Wang Yu, Jayanta Sahu, Lajos Hanzo, David J. Richardson, and Periklis Petropoulos
Opt. Express 32(9) 15483-15492 (2024)