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Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
Performance scaling comparison for free-space optical and electrical interconnection approaches.
Applied Optics
|February 15, 2008
Summary
Free-space optical interconnects offer significant advantages in bandwidth density, latency, and power consumption for complex, globally interconnected networks. Macro-optical elements scale better than micro-optical elements in these advanced computing applications.
Area of Science:
- Computer Engineering
- Optical Communications
- Integrated Circuit Design
Background:
- Traditional electrical interconnections face limitations in bandwidth density and power consumption for large-scale computing.
- Free-space optics presents a potential alternative for high-performance interchip communication.
- Smart pixels are key components for enabling optical interconnects within integrated circuits.
Purpose of the Study:
- To compare the projected performance of free-space optical and electrical interconnections.
- To evaluate these interconnections based on smart-pixel input-output bandwidth density and packaging constraints.
- To provide guidance on applying free-space optical interconnects to multiprocessor systems.
Main Methods:
- Performance metrics for free-space optical and electrical interconnections were projected and compared.
- Analysis included smart-pixel input-output bandwidth density and practical geometric packaging.
- Scaling properties of macro-optical versus micro-optical elements were investigated.
Main Results:
- Three-dimensional optical interconnects using smart pixels offer superior volume, latency, and power benefits for globally interconnected networks.
- Interconnection approaches utilizing macro-optical elements demonstrate better scalability compared to micro-optical elements.
- Micro-optical architectures face scaling limitations due to diffraction losses and the need for repeaters in high-bandwidth multichip systems.
Conclusions:
- Free-space optical interconnects, particularly 3D approaches with smart pixels, are highly beneficial for large-scale, interconnected multiprocessor systems.
- Macro-optical elements are preferable for achieving better scaling in optical interconnection architectures.
- The study provides a framework for assessing the suitability of free-space optical interconnects for specific multiprocessor challenges.
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