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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Glenn D. Boreman
  • Vol. 44, Iss. 33 — Nov. 20, 2005
  • pp: 7112–7124

Power-efficient dual-rate optical transceiver

Yongrong Zuo, Fouad E. Kiamiley, Xiaoqing Wang, Ping Gui, Jeremy Ekman, Xingle Wang, Michael J. McFadden, and Michael W. Haney  »View Author Affiliations


Applied Optics, Vol. 44, Issue 33, pp. 7112-7124 (2005)
http://dx.doi.org/10.1364/AO.44.007112


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Abstract

A dual-rate (2 Gbit/s and 100 Mbit/s) optical transceiver designed for power-efficient connections within and between modern high-speed digital systems is described. The transceiver can dynamically adjust its data rate according to performance requirements, allowing for power-on-demand operation. Dynamic power management permits energy saving and lowers device operating temperatures, improving the reliability and lifetime of optoelectronic-devices such as vertical-cavity surface-emitting lasers (VCSELs). To implement dual-rate functionality, we include in the transmitter and receiver circuits separate high-speed and low-power data path modules. The high-speed module is designed for gigabit operation to achieve high bandwidth. A simpler low-power module is designed for megabit data transmission with low power consumption. The transceiver is fabricated in a 0.5 µm silicon-on-sapphire complementary metal-oxide semiconductor. The VCSEL and photodetector devices are attached to the transceiver’s integrated circuit by flip-chip bonding. A free-space optical link system is constructed to demonstrate correct dual-rate functionality. Experimental results show reliable link operation at 2 Gbit/s and 100 Mbit/s data transfer rates with ∼104 and ∼9 mW power consumption, respectively. The transceiver’s switching time between these two data rates is demonstrated as 10 µs, which is limited by on-chip register reconfiguration time. Improvement of this switching time can be obtained by use of dedicated input–output pads for dual-rate control signals.

© 2005 Optical Society of America

OCIS Codes
(200.0200) Optics in computing : Optics in computing
(200.4650) Optics in computing : Optical interconnects
(250.0250) Optoelectronics : Optoelectronics
(250.3140) Optoelectronics : Integrated optoelectronic circuits

ToC Category:
Optical Computing

History
Original Manuscript: April 14, 2005
Manuscript Accepted: July 18, 2005
Published: November 20, 2005

Citation
Yongrong Zuo, Fouad E. Kiamiley, Xiaoqing Wang, Ping Gui, Jeremy Ekman, Xingle Wang, Michael J. McFadden, and Michael W. Haney, "Power-efficient dual-rate optical transceiver," Appl. Opt. 44, 7112-7124 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-33-7112

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