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Si-based On-chip Optical Interconnects
Shang Wang ECE423 12/16/06
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Disadvantages of Electrical Interconnects
Scaling Problem —— ”Aspect Ratio” Limit However, optical interconnects do not have such problem!
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Other Advantages of Optical Interconnects
Timing Accuracy Design Simplification voltage isolation Absence of wave reflection and impedance matching avoid inductive crosstalk frequency independence
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On-chip Optical Interconnect Data Path
Silicon Optical Modulator Si-based Photo Detector Silicon Laser Silicon Waveguide Driver Amplifier Electrical Logic Cell Electrical Logic Cell
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Simulated Raman Scattering (SRS)
Si-based Light Source ——Raman Silicon Laser Simulated Raman Scattering (SRS) A reversely biased p-i-n diode to eliminate the TPA-induced FCA
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Silicon Optical Modulator
metal-oxide-semiconductor (MOS) capacitor Mach-Zehnder Interferometer (MZI)
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Si-based Photo detector
SiGe multiple quantum wells (MQW)
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Conclusion The concept of optical interconnect brings a brilliant future for the dense interconnects to the silicon chips. The recent achievement in Intel of the silicon laser, silicon optical modulator and silicon-based photodetector shows the potential of monolithic integration of silicon-based optoelectronics.
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Thank you!
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