In 2023, the backbone transmission network for "digital data in the east and data in the west" will enter the 400G era, and the capacity of the trunk optical network will be greatly improved. While the large-scale commercial use of 400G is gradually deepening, the industry is also actively exploring the forward-looking deployment of 800G. 800G long-distance transmission requires continued development of key technologies such as 200GB+ high baud rate devices and C+L+S multi-band transmission based on 400G technology. Conduct research and achieve breakthroughs.
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