Design and Performance of a Circuit for the Analogue Optical Transmission in the CMS Inner Tracker

Le résumé fourni par la source

A new circuit for the conversion of analogue electrical signals into the corresponding optical ones has been built and tested by the CMS group of Perugia. This analogue opto-hybrid circuit will be assembled in the readout electronic chain of the CMS tracker inner barrel. The analogue opto-hybrid is a FR4 (vetronite) substrate equipped with one programmable laser driver chip and 2 or 3 laser diodes, all being radiation tolerant. The description of the circuit, production flow and qualification tests with results are reported and discussed. I. CIRCUIT LAYOUT The analogue opto-hybrid circuit designed and built by the Perugia CMS group [1] will be employed in the analogue optical link of the TIB (Tracker Inner Barrel) and TID (Tracker Inner Disks) parts of the CMS tracker [2]. A similar circuit has been prototyped for the TOB (Tracker Outer Barrel) and TEC (Tracker End Caps) at CERN. The schematic of the analogue optical link is reported in Figure 1. Readout memory Front End

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