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Quasi-light Storage for Optical Data Packets

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Comparison between optical and electrical interconnects based on power and speed considerations.

M R Feldman, S C Esener, C C Guest

|June 10, 2010

Summary

Optical interconnects offer higher data rates and lower power consumption than electrical links for intrachip communication. This analysis explores conditions for optimal performance, considering factors like circuit scaling and signal fan-out.

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Area of Science:

Photonics and optoelectronics
Integrated circuit design
Computer architecture

Background:

Electrical interconnects face limitations in data rate and power consumption as chip dimensions scale down.
Optical interconnects present a potential solution for high-speed, low-power data transmission within integrated circuits.
Free-space optical intrachip communication is an emerging technology for overcoming current bottlenecks.

Purpose of the Study:

To determine the conditions under which optical interconnects outperform electrical interconnects in terms of data rate and power efficiency.
To analyze the feasibility of free-space optical intrachip communication links.
To investigate the impact of key design parameters on optical interconnect performance.

Main Methods:

Theoretical analysis of optical and electrical interconnect performance metrics.
Modeling of free-space optical links considering signal propagation and component efficiencies.
Evaluation of system-level performance based on circuit dimensions, fan-out, and modulator characteristics.

Main Results:

Optical interconnects can achieve higher data rates and lower power consumption compared to electrical interconnects under specific conditions.
The analysis quantifies the trade-offs associated with scaling circuit dimensions and signal fan-out.
The use of light modulators as transmitters is evaluated for its impact on overall system efficiency.

Conclusions:

Free-space optical interconnects are a viable technology for future high-performance computing systems.
Careful consideration of design parameters is crucial for maximizing the benefits of optical interconnects.
Optical interconnects show significant promise for overcoming the limitations of electrical interconnects in intrachip communication.