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Appl Opt. 2005 Oct 10;44(29):6240-52.

Performance-based adaptive power optimization for digital optical interconnects.

Author information

  • 1Department of Electrical and Computer Engineering, University of Delaware, Newark, Delaware 19716, USA. xiaoqing.j.wang@intel.com

Abstract

Optical links are traditionally set to transmit maximum power for worst-case loss and consequently to dissipate more power than is required. We describe a technique to minimize power consumption based on the measured bit-error rate (BER) of the link. This technique uses a novel power-negotiation algorithm that optimizes the link power setting to achieve minimum power dissipation for a target BER. A 0.5 microm complementary metal-oxide semiconductor optical transceiver chip was fabricated, and a free-space optical interconnect system was built for validation. The results showed that the algorithm was able to find the optimum power settings for the VCSELs for a target BER and to account for dynamic changes such as variation in the optical loss in the system.

PMID:
16237941
[PubMed]
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