We propose a line code that has fast resynchronization capability and low latency. Both the encoder and decoder have been implemented in FPGAs. The encoder has also been implemented in an ASIC. The latency of the whole optical link (not including the optical fiber) is estimated to be less than 73.9 ns. In the case of radiation-induced link synchronization loss, the decoder can recover the synchronization in 25 ns. The line code will be used in the ATLAS liquid argon calorimeter Phase-I trigger upgrade and can also be potentially used in other LHC experiments.
@article{arxiv.2202.04288,
title = {A line code with quick-resynchronization capability and low latency for the optical data links of LHC experiments},
author = {Binwei Deng and Mengxun He and Jinghong Chen and Di Guo and Suen Hou and Xiaoting Li and Chonghan Liu and Ping-Kun Teng and Annie C. Xiang and Yang You and Jingbo Ye and Datao Gong and Tiankuan Liu},
journal= {arXiv preprint arXiv:2202.04288},
year = {2022}
}