A prototype optical-link board has been developed for the ATLAS Liquid Argon Calorimeter Phase-2 upgrade. The board consists of 24 lpGBT chips and 8 VTRx+ modules and demonstrates the full optical link design of the future front-end board. The board has 22 simplex optical links to transmit detector data, which are emulated in FPGAs and injected through 6 FMC connectors, to the off-detector electronics. The board implements 2 duplex optical links for clocks, control, and monitoring with redundant design to improve the system reliability. Data transmission and all redundant designs have been verified. A fiber routing scheme, in which 2 or 3 VTRx+ modules are re-connected to the front panel with an MPO connector, has been prototyped.
@article{arxiv.2203.06275,
title = {A prototype optical link board with redundancy design for the ATLAS liquid argon calorimeter Phase-2 upgrade},
author = {X. Huang and C. Liu and A. Deiana and B. Deng and D. Gong and L. Hasley and S. Hou and T. Liu and H. Sun and J. Ye and L. Zhang and W. Zhang},
journal= {arXiv preprint arXiv:2203.06275},
year = {2022}
}