Abstract

In optical fiber networks, unrepeated links are cost effective solutions to provide connectivity in challenging contexts that hinder the deployment of in-line amplifiers. Extending the optical bandwidth beyond the C-band with ultra-wideband (UWB) amplification schemes is a promising way to scale the wavelength division multiplexed (WDM) throughput of such single-span systems. In this paper, we report on the use of semiconductor optical amplifiers (SOAs) combined with distributed Raman pumping to enable 100 nm ultra-wideband unrepeated transmissions over a 257.5 km ultra low-loss, large effective area fiber span. Leveraging state-of-the-art digital signal processing, wavelength-adaptive modulation and soft-decision forward error correction (FEC) schemes, we demonstrate a record capacity-distance product of 25.6 Pb/s $\cdot$ km, with a net throughput of 99.35 Tb/s over 257.5 km, using 247×49 GBd channels in S-, C- and L-bands.

S-, C- and L-band transmission over a 157 nm bandwidth using doped fiber and distributed Raman amplification

Benjamin J. Puttnam, Ruben S. Luís, Georg Rademacher, Manuel Mendez-Astudillio, Yoshinari Awaji, and Hideaki Furukawa
Opt. Express 30(6) 10011-10018 (2022)

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)

Total net-rate of 27.88 Tb/s full C-band transmission over 4,550 km using 150 km span length and high-gain EDFA amplification

Xingchen He, Lin Jiang, Jihui Sun, Anlin Yi, Chengpeng Fu, Qianggao Hu, Wei Pan, and Lianshan Yan
Opt. Express 32(8) 13500-13507 (2024)

WDM bi-directional transmission over 35 km amplified fiber-optic bus network using Raman amplification for optical sensors

Silvia Diaz, Gorka Lasheras, and Manuel Lopez-Amo
Opt. Express 13(24) 9666-9671 (2005)

Demonstration of a 90 Tb/s, 234.8 km, C+L band unrepeatered SSMF link with bidirectional Raman amplification

Ruben S. Luis, Benjamin J. Puttnam, Georg Rademacher, Yoshinari Awaji, and Hideaki Furukawa
Opt. Express 30(8) 13114-13120 (2022)