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150-Mbit/s/ch 12-channel optical parallel transmission using an LED and PD array

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Abstract

High speed optical parallel transmissions are attractive for various computer interface and interconnections because of their advantages in transmission capacity, distance, and small cable size over electrical parallel transmission due to low skew and low signal loss in fibers. Moreover, they have advantages in electrical component cost and size over optical serial transmissions, when the bit rate per channel increases to over 100 Mbit/s, because they do not need faster driver/receiver and MUX/DEMUX circuits. Monolithically integrated linear arrays of low drive current, high speed light emitting diodes (LEDs) are particularly useful because of their potential for low temperature sensitivity, high reliability, and low component cost. However, the high speed linear LED arrays reported1,2 have been requiring large drive current of 100-150 mA/ch for sufficient fiber coupled power and speed. This paper reports a 12-channel 150-Mbit/s/ch 100-m optical parallel transmission, using a newly developed low drive current LED and PD array, with as low as 15-mA p-p/ch LED drive current. This high speed optical parallel transmission should meet the demand for upgrading the performance of high speed channels and interfaces for supercomputers and other systems.

© 1990 Optical Society of America

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