Design and implementation of a two-stage optical-power-supply spot array generator for a modulator-based free-space interconnect

A multistage free-stage optical interconnect for backplane applications: implementation issues

“…The devices are placed on a 90 pm pitch whilst the clusters are placed on an 800 pm pitch. The modulators are illuminated via an optical power supply (OPS) which generates the required array of 512 spots [4]. Polarizing optics (comprising of two quarter wave plates (QWP) and a polarizing beam splitter (PBS)) are used to combine the CW spot array and the optical data transmitted from the previous stage onto each OEIC whilst allowing optical output from the OEIC to be transmitted to the next stage.…”