University of California Santa Barbara 1 Future Optical Networks: Impact of Silicon Photonics John...
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University of California University of California Santa Barbara Santa Barbara 1 Future Optical Networks: Impact of Silicon Photonics John E. Bowers University of California, Santa Barbara
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Future Optical Networks:Impact of Silicon Photonics
John E. Bowers
University of California, Santa Barbara
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Where is Silicon Photonics Heading?• Integration with CMOS electronics
• > 100,000 electronic and photonic devices/die
• Redundant elements
• Self testing, flexible, software controlled IO formats
• High yield, High reliability
• Laser, amplifier, modulator, photodetectors, delay lines, AWGs on chip
Silicon Evanescent Laser
Silicon Evanescent Amplifier
PDs
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What does VLSI Photonics Require?
• > 100,000 electronic and photonic devices/die
• CMOS Integration
• Redundancy
• Self testing, flexible, software controlled IO formats
• High yield
• High reliability
• Laser, amplifier, modulator, photodetectors, low loss delay lines, optical buffers, AWGs on chip
Suppose Silicon Photonics is able to do this by 2008.What is the impact in 2010-2015?
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Cost
• 6” wafer has 73,000 0.5 mm sized die sites.
• Cost per laser: < $0.01
• PICs: Laser size: 10x100 microns.
• Cost per laser: $0.00002
• This is just like estimating the cost of transistors. They are free. Only the PIC cost matters.
• Lasers, modulators, photodetectors will be free.
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PIC Cost
• CMOS die cost: $1/cm2
• Hybrid silicon evanescent PIC cost: $2/cm2
• PICs with interface and drive electronics, and tens of lasers, modulators and PDs cost <$1.
Example: Silicon DWDM Transmitter
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Future Optical Networks• Transceivers will be cheap and ubiquitous; hence
the network must scale to millions or more transceivers.
• Transmitters and receivers will adapt to the channel characteristics.
• Data rates will self adjust depending on the channel quality.
• Networks will be reconfigurable and adaptable.
•Challenge: •How to make use of billions of elements on the network.•How to make silicon PICs for a penny a PIC.
