From the perspective of communication development, high speed is the eternal theme of the development of optical transmission network. At present, 100G is the mainstream technology of optical transmission network, and China has built the largest commercial transmission network of 100G WDM/OTN in the world.

         With the advent of 5G era, the demand for network bandwidth has been surging, and 100G has begun to feel laborious. In order to relieve the pressure on   data transmission,  the over 100G coherent transmission   represented by the single carrier 200G / 400G becomes the focus.400G is the only way for   communication network construction

          With the rapid development of emerging technologies and industries such as cloud computing and big data, telecom operators and Internet giants are feeling unprecedented pressure. In order to better meet these conditions, the computing processing of these data needs to be collected to the cloud. During this process, the demand for data transmission will also increase greatly.

       With the outbreak of relevant demands, the data volume processed by aliyun has shown a significant growth every year, and alibaba keeps expanding its data center to meet the challenge. In the process of data center construction, the demand of high speed optical module also gets high speed growth.

        The data center is a virtual computer made up of a series of servers that need to be interconnected via fiber and optical modules to form a powerful server to provide more computing power. From the rate of the data center, it is generally believed that cloud computing starts from 10G to 40G to 100G, and the next generation of data center will develop to 400G.

      The broad market prospect of 400G has become the consensus of the communication industry. Therefore, many manufacturers of optical devices and optical modules have increased their investment in this aspect.