The imec solution quoted was:
The dynamic power consumption of the transceiver, including the CMOS driver and receiver, was less than 2pJ/bit.
The last data we have on POET which is a couple of years old is up to 7.4X more efficient.
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Optical Interconnection of High Speed Circuits
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energy
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POET (near term)
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Current Silicon Photonics Solution
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POET energy used compared to benchmark
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transmit power
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pj/bit
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0.27
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7.2
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3.75%
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4mW @ 15 Gb/s
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36mW @ 5Gb/s
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receive power
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pj/bit
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0.42
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5.6
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7.50%
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6.3 mW @ 15 Gb/s
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28 mW @ 5 Gb/s
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There is just no comparison to the fully integrated single chip solution that POET technology offers
