This paper presents several component prototypes towards a low-latency, small-form-factor optical link designed for the ATLAS Liquid Argon Calorimeter Phase-I trigger upgrade. A prototype of the custom-made dual-channel optical transmitter module, the Miniature optical Transmitter (MTx), with separate transmitter optical sub-assemblies (TOSAs) has been demonstrated at data rates up to 8 Gbps per channel. A Vertical-Cavity Surface-Emitting Laser (VCSEL) driver ASIC has been developed and is used in the current MTx prototypes. A serializer ASIC prototype, operating at up to 8 Gbps per channel, has been designed and tested. A low-latency, low-overhead encoder ASIC prototype has been designed and tested. The latency of the whole link, including the transmitter latency and the receiver latency but not the latency of the fiber, is estimated to be less than 57.9 ns. The size of the MTx is 45 mm x 15 mm x 6 mm.
@article{arxiv.2202.04285,
title = {Component Prototypes towards a Low-Latency, Small-form-factor Optical Link for the ATLAS Liquid Argon Calorimeter Phase-I Trigger Upgrade},
author = {Binwei Deng and Mengxun He and Jinghong Chen and Datao Gong and Di Guo and Suen Hou and Xiaoting Li and Futian Liang and Chonghan Liu and Gang Liu and Ping-Kun Teng and Annie C Xiang and Tongye Xu and You Yang and Jingbo Ye and Xiandong Zhao and Tiankuan Liu},
journal= {arXiv preprint arXiv:2202.04285},
year = {2022}
}