Abstract

We extend the transmission distance of 400GBASE-LR4 and 400GBASE-LR8 systems by introducing simple and ultrawideband single-stage bismuth-doped fiber amplifiers (BDFAs). The transmission reach of emerging 400GBASE-LR4 and 400GBASE-LR8 transceivers was successfully extended from 10 km to 20 and 90 km, respectively. The transmission links were stable over seven days for both systems. Furthermore, we demonstrate that the transmission reach was maximized up to the chromatic dispersion limit and show the applicability of BDFAs for upgrading the transmission reach of cost-effective transceivers to meet the requirements of 400ZR applications. This offers a reasonable solution for improving the power budget and extending the reach of existing data center interconnections with 400GBASE-LR4/LR8 transceivers.

52 Gbps PAM4 receiver sensitivity study for 400GBase-LR8 system using directly modulated laser

Reza Motaghiannezam, Thang Pham, Alan Chen, Tengda Du, Chris Kocot, Jack Xu, and Bernd Huebner
Opt. Express 24(7) 7374-7380 (2016)

Experimental demonstration of single-span 100-km O-band 4×50-Gb/s CWDM direct-detection transmission

Yang Hong, Natsupa Taengnoi, Kyle R. H. Bottrill, Naresh K. Thipparapu, Yu Wang, Jayanta K. Sahu, David J. Richardson, and Periklis Petropoulos
Opt. Express 30(18) 32189-32203 (2022)

Amplifier-free 4×96 Gb/s PAM8 transmission enabled by modified Volterra equalizer for short-reach applications using directly modulated lasers

Di Li, Lei Deng, Yao Ye, Yucheng Zhang, Haiping Song, Mengfan Cheng, Songnian Fu, Ming Tang, and Deming Liu
Opt. Express 27(13) 17927-17939 (2019)

30-GBaud DP 16-QAM transmission in the E-band enabled by bismuth-doped fiber amplifiers

Aleksandr Donodin, Mingming Tan, Pratim Hazarika, Vladislav Dvoyrin, Ian Phillips, Paul Harper, Sergei K. Turitsyn, and Wladek Forysiak
Opt. Lett. 47(19) 5152-5155 (2022)

Cladding pumped bismuth-doped fiber amplifiers operating in O-, E-, and S-telecom bands

Alexander Vakhrushev, Aleksandr Khegai, Sergey Alyshev, Konstantin Riumkin, Alexander Kharakhordin, Elena Firstova, Andrey Umnikov, Alexey Lobanov, Fedor Afanasiev, Aleksei Guryanov, Mikhail Melkumov, and Sergei Firstov
Opt. Lett. 48(6) 1339-1342 (2023)