1Gb/s, 9x1 optical receiver array, for an adaptive redundant interconnect system, using NT25 technology

摘要

This paper presents the design of a receiver used in a self-aligning optical interconnect. We have made use of spatial redundancy to increase the misalignment tolerance of a system of four 1Gb/s free-space optical links. the receiver for this system is a raphidly re-configurable array that accepts nine low-amplitude, high-speed photocurrents, selects one of then, and then ouputs that signal as a disital differential positive emitter coupled logic (PECL) signal. The selection of which channel to amplify is based oln received power, and is performed off-chip. Preliminary results indicate that the receiver performs with a low bit error rate up to 750Mb/s.