Optical modules are the basic building blocks of 5G transport networks, data center intra- and inter-connections. This paper focus on technical solutions and standardization status of 800Gb/s optical modules, as well as the maturity of the industry chain of core optoelectronic chips inside the optical module. First, application scenarios and requirements of 800Gb/s optical modules were analyzed. Second, technical solutions and standardization progress of 8×100Gb/s PAM4, 4×200Gb/s PAM4 and 800Gb/s coherent optical modules with different transmission distances were studied.
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