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Optical links in datacentres operate mainly in burst mode. The utilisation might be as low as 10%, i.e. most of the time the link is idle, but still consumes power. It would therefore be desirable to put these links into a low-power sleep mode during idle signal by reducing the bias, and to operate the electronics and laser only when data is actually being transmitted. The laser is typically implemented...
We present eye width analysis for short multimode fiber links (<100 m) including modal noise and laser relative intensity noise. Contrary to power budgeting for traditional links, eye width budgeting is better suited for short links.
High-end computing servers configured as symmetric multi-processor (SMP) systems rely on parallel high speed links for interconnection between the processors. With each new generation of processor, the bandwidth of the SMP link is increased. Wired copper cables are still the technology of choice for this application but with each increment in bandwidth, fiber optic interconnects become more competitive...
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