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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 22,
  • Issue 9,
  • pp. 2135-
  • (2004)

A 2-Gb/s 0.5-µm CMOS Parallel Optical Transceiver With Fast Power-On Capability

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Abstract

This paper describes an optical transceiver designed for power-efficient connections within high-speed digital systems, specifically for board-and backplane-level interconnections. A 2-Gb/s, four-channel, dc-coupled differential optical transceiver was fabricated in a 0.5-µm complementary metal-oxide-semiconductor (CMOS) silicon-on-sapphire (SoS) process and incorporates fast individual-channel power-down and power-on functions. A dynamic sleep transistor technique is used to turn off transceiver circuits and optical devices during power-down. Differential signaling (using two optical channels per signal) enables self-thresholding and allows the transceiver to quickly return from power-down to normal operation. A free-space optical link system was built to evaluate transceiver performance. Experimental results show power-down and power-on transition times to be within a few nanoseconds. Crosstalk measurements show that these transitions do not significantly impact signal integrity of adjacent active channels.

© 2004 IEEE

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