Array optical transceiver in miniature form factor for high energy physics applications

Array optical transceiver provides high speed data transmission with low mass fibers for detector readout in collider experiments. The module assembly in miniature form factor is favorable for compactness in applications. We report on investigation for components and chip-on-board assembly of an array transmitter with an optical interface of about 2 mm in height suitable for 10+ Gbps/ch data transmission in a radiation hazard environment. The active opto-electronics of 850 nm GaAs VCSELs are investigated for ageing in burn-in at 85°C, 85% RH condition. A radiation-tolerant laser driver is developed in 65 nm CMOS technology. The module assembly includes the VCSEL aligned to optical path component for light coupling to multi-mode fibers. The tolerance of optical path component in radiation is tested in Co⁶⁰ gamma-ray of up to 300 kGy. The light coupling efficiency is examined for VCSEL emission modes in far-field distributions.