CPO technologies are now far more reliable. Looking ahead to the 400 g-per-lane SerDes generation, CPO may become the only viable option. Today, data centers use a separate approach for optics and electronics, in which optical modules are connected to switches and routers through high-speed electrical interfaces. They make the signal path much shorter, from centimeters to millimeters. Compared to typical optoelectronic connectivity technology, CPO presents distinct benefits in terms of bandwidth, size, weight, and power consumption. This study presents an overview of CPO, highlighting its fundamental principles, advantages, and distinctive features. However, it's worth noting that Andy Bechtolsheim, co-founder of Arista and a long-standing visionary in data centre. Traditional electrical interconnects and pluggable optical module technologies are approaching their performance limits when dealing with network speed demands of 800G, 1.
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