Currently, the world's top hyperscale cloud service providers are planning to establish new data centers in multiple regions around the world, and data center spending is expected to continue to surge significantly. As the scale development of data center networks and the continuous upgrade and evolution of cloud computing data center network topology, the demand for higher speed, lower power, and lower cost for data center optical interconnect technologies has been raised. With the rapid development of cloud data centers and the continuous rise of traffic, the development of data center optical interconnection network architecture has shown different evolutionary trends, from 400G to 800G, and the next step will move into 6.4T, 12.8T and even to 25.6T later, which will put forward higher demand for data center high-speed transmission technology from the network, server and switch equipment capacity, chip and module. The future trend needs to be discussed by the players from industry upstream and downstream.