Abstract
We propose advanced maximum likelihood sequence estimation (MLSE) methods for increasing the capacity of short-reach intensity-modulated direct detection (IM-DD) transmissions for economically realizing next generation Ethernet such as 800 GbE or 1.6 TbE. It is particularly important to conquer the traffic growth in data center networks, which has become a major issue. In this article, we introduce a method for reducing the complexity of the Viterbi algorithm, which is a problem in the actual implementation of MLSE, by using a penalty-less truncated trellis diagram with temporal decision results. Next, we introduce a method for improving the demodulation performance by precisely emulating the nonlinear response of the transmission system with low-cost devices using a nonlinear filter. Finally, we introduce a method for reducing the computational complexity with a decision feedback function. Transmission experiments in the O-band with transmission rates of 200 Gbps/lane or higher using each of the proposed methods are also presented. Finally, we present a 200 Gbps/lane 4-LAN-WDM 800 G 2 km transmission experiment using a 4-channel LAN-WDM TOSA designed for 400 G transmission.
PDF Article
More Like This
Complexity curtailed MLSE equalizer based on a compact look-up-table for C-band DSB IM/DD transmission
Zhuo Chen, Xiaoxiao Dai, Junyuan Nie, Shenmao Zhang, Jiahao Zhou, Jing Zhang, Ying Qiu, Ming Luo, Qi Yang, Lei Deng, Mengfan Cheng, Kun Qiu, and Deming Liu
Opt. Lett. 47(21) 5606-5609 (2022)
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription