This paper proposes two kinds of parallel line codes based on multiplexing and nonmultiplexing, and a method of automatic skew suppression based on bit synchronization and frame synchronization. This achieves parallel high-speed optical transmission to overcome bottlenecks in parallel electronic transmission and to increase the distance of high-throughput interconnections. We have developed GaAs coder/decoder large-scale integrations (LSI's) for the coding algorithm and skew suppression, and analog LSI's for compact, low-power, high-speed parallel optical links. Experimental results show that our proposed parallel transmission methods and fabricated LSI's can play a key role in realizing high-speed, long-distance parallel transmission and in reducing the size and power consumption of high-throughput parallel optical links.
Nobuhiro Fujimoto, Atsuo Ishizuka, Hiroyuki Rokugawa, and Kazuyuki Mori, "Skew-Free Parallel Optical Transmission Systems," J. Lightwave Technol. 16, 1822- (1998)