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Performance consideration of three-dimensional optoelectronic interconnection for intra-multichip-module clock signal
Applied Optics
|April 20, 1997
Summary
This study details a 3D optoelectronic device for distributing clock signals using holographic gratings. It addresses uniform signal distribution and minimizes clock skew for improved performance in high-speed systems.
Area of Science:
- Optoelectronics
- Holographic Optics
- High-Speed Interconnects
Background:
- Optoelectronic devices are crucial for high-speed data transmission.
- Efficient clock signal distribution is a key challenge in parallel computing.
Purpose of the Study:
- To describe the structure, fabrication, and theory of a 3D planarized optoelectronic clock signal distribution device.
- To present theoretical research on achieving globally uniform fan-out distribution.
- To analyze and propose solutions for clock skew in such systems.
Main Methods:
- Utilizing a thin light-guiding substrate and a 2D polymer holographic grating array.
- Developing an objective function to equalize fan-out beam intensities.
- Experimentally demonstrating gradient index (GRIN) lenses for beam collimation and focusing.
Main Results:
- A 25-GHz 1-to-42 fan-out interconnect with a 10 dB signal-to-noise ratio was previously demonstrated.
- Theoretical framework for M x N fan-out distribution using M + N + 1 holograms.
- GRIN lenses significantly enhance optical beam profile manipulation and packaging tolerance.
Conclusions:
- The proposed device offers a viable solution for parallel clock signal distribution.
- Minimizing angular misalignment, wavelength dispersion, and spot-size variations is critical.
- Schemes to minimize clock skew are proposed for enhanced system performance.
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