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100-Tb/s-class Long-haul Transmission in Triple-band WDM with Forward- and Backward-pumped Distributed Raman Amplifications
Author(s) -
Fukutaro Hamaoka,
Kosuke Kimura,
Masanori Nakamura,
Takeo Sasai,
Takayuki Kobayashi,
Yutaka Miyamoto,
Etsushi Yamazaki
Publication year - 2025
Publication title -
journal of lightwave technology
Language(s) - English
Resource type - Magazines
SCImago Journal Rank - 1.346
H-Index - 200
eISSN - 1558-2213
pISSN - 0733-8724
DOI - 10.1109/jlt.2025.3638649
Subject(s) - communication, networking and broadcast technologies , photonics and electrooptics
This paper presents high-capacity, long-haul, wavelength division multiplexing (WDM) transmission exceeding 100 Tb/s over 1000 km in the S+C+L band, which utilizes forward (FW)- and backward (BW)-pumped distributed Raman amplifications (DRAs). From transmission experiments, we confirmed the relationship between the FW Raman on-off gain and improved signal-to-noise ratio of the signal to evaluate the effect of relative-intensity-noise transfer from the FW-pumped DRA on the transmitted signal quality and determine the optimal FW Raman on-off gain. We successfully demonstrated 100-Tb/s-class high-capacity long-haul transmission using 122 channels of 144-GBaud signals in the 18.3-THz triple-band WDM configuration with FW- and BW-pumped DRAs for 80-km fiber spans. The total achievable (and net) bitrates were 117.6 (112.0) Tb/s over 1040 km, 113.8 (107.7) Tb/s over 1200 km, 109.9 (103.0) Tb/s over 1360 km, and 104.0 (96.3) Tb/s over 1600 km.

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