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Acousto-optic photonic crossbar switch. Part I: design
Applied Optics
|December 4, 2010
Summary
This study introduces a novel 12x12 photonic crossbar interconnection network using a single acousto-optic crystal. This design simplifies previous architectures by angularly multiplexing optical inputs into one device, enhancing efficiency.
Area of Science:
- Photonics
- Optical Engineering
- Interconnection Networks
Background:
- Traditional photonic crossbars utilize bulk acousto-optic cells, each requiring a dedicated deflector per optical input.
- This complexity leads to larger device footprints and potentially lower overall efficiency.
Purpose of the Study:
- To design a compact and efficient 12x12 photonic crossbar interconnection network.
- To introduce angular multiplexing of optical inputs within a single acousto-optic device.
Main Methods:
- A Fourier-optics analysis was performed on an acoustically lossy Bragg deflector.
- Momentum-space analysis was coupled to derive comprehensive design equations.
- A coupled-mode analysis examined first- and second-order diffractions for efficiency bounds.
Main Results:
- Complete design equations for the photonic crossbar switch were derived.
- A detailed design for a 12x12 crossbar was presented as a practical example.
- Fundamental efficiency limitations of the angularly multiplexed Bragg cell were identified.
Conclusions:
- The proposed design offers a more integrated and potentially efficient solution for photonic crossbar networks.
- Angular multiplexing in a single acousto-optic crystal is a viable approach for complex interconnection networks.
- The derived design equations and efficiency analyses provide a foundation for future acousto-optic switch development.
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