Coherent Optical Communication Technology

Coherent optical communication technology has moved from the initial backbone/long-distance network to the deployment of metropolitan area networks, and is further oriented to the optical interconnection of DCI data centers, and even urban domain network, and proved to be feasible in the access network. In the field of data centers, Microsoft and Amazon have begun to deploy 400G ZR in batches and 400ZR+. In the telecom market, Huawei, Ciena, Cisco, Infinera, Nokia, etc. have launched coherent optical network solutions.

Nokia:

• IP+optical network integration can provide a complete networking solution for different scenarios, different transmission distances, and different transmission performance: <120km

For 400G interconnection, use a router to configure 400G QSFP-DD gray light or colored light modules; for longer distances, use a router to configure CFP2-DCO’s 400

Multi-span optical module solution; multi-segment ultra-long distance, completed by optical network system 400G optical transmission.

Cisco: 400G has taken off

• As of the first half of 2022, more than 700 customers have upgraded to 400GbE networks, and the number of orders has reached 737,000 ports.

Infinera:

• British operator Virgin Media achieved single-fiber 400Gbps transmission based on Infinera's XR optics point-to-multipoint coherent transmission technology.

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