Optical Links for ATLAS Liquid Argon Calorimeter Front-end Electronics Readout

This paper presents the design, production quality assurance, integration, installation and commissioning of the optical link system for the ATLAS Liquid Argon Calorimeter front-end electronics readout. Operation experience and the recent problems with the optical transmitters are discussed. Also presented are the up-to-date results in searching for failure modes, experiences gained in that process, and a possible drop-in backup solution with redundancy for the optical transmitter.