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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 demonstrate a low power optical interconnect transmitter which employs a 990 nm VCSEL with high efficiency and low threshold current, and a 130 nm CMOS driver. The power dissipated by the transmitter is 15.1 mW at 10 Gbps.
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