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Compared with 10G, 25G, 40G, 100G optical modules, the arrival of 400G optical modules will bring optical communication into a new era. Optical communication is changing from single-carrier coherent detection in low-end optical modules to polarization multiplexing multi-carrier applications. Photonic integration and electronic integration, ADC\/DSP technology will be the key to the commercialization of 400G optical communication system. With the urgent need for Ethernet standardization, the demand for optical parallelization will greatly facilitate the development of photonic integration technology. Although only one optical chip is used in 400G optical modules, the cost is high\uff1ain 10G\/25G optical modules, the cost of optical chip accounts for about 30%; in 40G\/100G optical modules, the cost of optical chip accounts for about 50%; and in 400G optical modules, the cost of optical chip is as high as 70%. Although 10G, 25G, 40G and even 100G optical modules have become the mainstream of the market, but with the increasing requirements for bandwidth, port density and system energy consumption, 400G optical modules will further push the technology to a higher level of development.<\/span><\/p>\nCompared to 200G optical modules, the more mainstream form factor of 400G optical modules is 400G QSFP-DD<\/u><\/a>, while 200G optical modules are also available in QSFP-DD forms, but the more mainstream is the 200G QSFP56. Since the OEMs (Original Equipment Manufacturers) and the third-party module vendors are now vigorously developing and producing 200G optical modules in order to compete for emerging markets, making 200G optical modules cheaper to purchase. Therefore, a data center with a tight budget can postpone the more expensive 400G upgrade to a later date and take the 200G intermediate option.<\/span><\/p>\n <\/p>\n
<\/span><\/b>3. Summary<\/b><\/strong><\/span><\/span><\/span><\/h2>\n <\/p>\n
The primary function of 400G optical transceivers\u00a0is to increase data throughput and maximize bandwidth and port density in data centers. The demand for bandwidth in mega data centers is growing, and in the future, 400G optical\u00a0modules will be the best choice to improve system performance and reduce bandwidth costs. Moreover, the emergence of 5G networks will be another positive factor to promote the market value of 400G optical transceivers.<\/span><\/p>\n <\/p>\n
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