Present paper describes a transmission data format, called “Group Multiplexing and Coding, ” for ultra high-speed optical parallel interconnections and related devices. The potentiality of the format for solving skew and burst-mode compatibility problems is also presented.Our optical transmitter and receiver modules comprises a semiconductor laser diode arraywith a low threshold current, a photodiode with ultra-low parasitic capacitance, and arrayed LSICs fabricated by a GaAs submicron process. A 156 Mb/s-20 channel parallel transmissionexperiment over 400m shows that our transmission format solves skew and burst-mode compatibilityproblems in ultra high-speed optical transmissions.
