Abstract

100 G/λ amplifier-free direct detection (DD) systems beyond 40-km reach are desirable to enable the next generation cost- and power-efficient 800 G-ER optical modules. Though such systems in the O-band have been demonstrated, an interest remains to leverage the investment in long haul C-band transceivers. To our knowledge, this article reports the first C-band amplifier-free DD system at beyond 100 G throughput over reaches of 40 and 60-km using a high-power single-sideband transmitter (HPSSBT). This transmitter configuration allows for a cost-efficient 100 G transceiver for the datacenter interconnect requiring only a single digital-to-analog converter (DAC), a Mach–Zehnder modulator, a single-ended photodiode with integrated trans-impedance amplifier (PD+TIA), and an analog-to-digital converter (ADC). In this article, we studied the performance impact of key system parameters including the digitally regenerated DC component of the photocurrent, the driving voltage, and the launch power. We also characterized the sensitivity impact of the system nonlinearity and demonstrated the transmission of 155.14 Gb/s and 104.67 Gb/s net rate single sideband (SSB) PAM-4 signals over 40-km and 60-km of single-mode fiber (SMF) below the HD-FEC threshold of 3.8 × 10⁻³, respectively. Due to the colored SNR, we further approached the system capacity by transmitting a probabilistically-shaped multi-subcarrier (PS-MSC) signal, allowing a throughput of 176 Gb/s over a 40-km SMF assuming an SD-FEC with a normalized general mutual information (NGMI) threshold of 0.88.

100 GBd IM/DD transmission over 14 km SMF in the C-band enabled by a plasmonic SSB MZM

Benedikt Baeuerle, Claudia Hoessbacher, Wolfgang Heni, Yuriy Fedoryshyn, Ueli Koch, Arne Josten, Delwin L. Elder, Larry R. Dalton, and Juerg Leuthold
Opt. Express 28(6) 8601-8608 (2020)

112-Gb/s SSB 16-QAM signal transmission over 120-km SMF with direct detection using a MIMO-ANN nonlinear equalizer

Shaohua An, Qingming Zhu, Jingchi Li, Yuye Ling, and Yikai Su
Opt. Express 27(9) 12794-12805 (2019)

100 Gb/s PAM4 transmission system for datacenter interconnects using a SiP ME-MZM based DAC-less transmitter and a VSB self-coherent receiver

Zhenping Xing, Alireza Samani, Meng Xiang, Eslam El-Fiky, Thang M. Hoang, David Patel, Rui Li, Meng Qiu, Md. Ghulam Saber, Mohamed Morsy-Osman, and David V. Plant
Opt. Express 26(18) 23969-23979 (2018)

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)

56-Gb/s/λ C-band DSB IM/DD PAM-4 40-km SSMF transmission employing a multiplier-free MLSE equalizer

Zhuo Chen, Junyuan Nie, Shenmao Zhang, Qi Yang, Xiaoxiao Dai, Lei Deng, Mengfan Cheng, and Deming Liu
Opt. Express 30(7) 11275-11287 (2022)