5G optical fiber product network construction requirements. 5G is a leading technology in the field of new generation information and communication technology. At the same time, 5G technology, as an important factor in promoting the development of the industrial Internet, is both a new opportunity and a huge challenge. It is worth mentioning that in the process of transformation from informatization and automation to digitalization and intelligence, industry customers are actively embracing 5G technology. At the same time, 5G network construction has put forward higher requirements for optical fiber and cable products. This article only explains the application requirements of 5G network construction for optical cable products from the perspective of optical cable applications. Requirements for optical fiber in 5G network construction: 1. Front-end Because there are a large number of optical fiber resources in the front-end network, pipeline resources need to be laid. In this scenario, G.657.A2 with high bending resistance is a suitable choice. 2. The transmission distance of the aggregation layer does not exceed 80km, but all data traffic at the access layer of the 5G metropolitan area network needs to be aggregated. The line interface bandwidth will reach 200Gbps, usually using 200G gray optical module or N 100G color optical module, and G.652.D optical fiber or new optical fiber can be laid. 3. Core layer This is the last level of the metropolitan area network. It will be directly connected to the provincial backbone network and upward to the backbone network. Obviously, of all the levels in the metropolitan area network, it is the one that handles the largest amount of traffic. The core layer of 5G metropolitan area network generally uses a ring network or dual uplink network, and the peak bandwidth of the line interface will be increased to 400Gbps. Usually 400G gray optical module or N 400G color optical module is used, and the transmission distance is not large. For distances exceeding 80 kilometers, low-cost, high-bandwidth G.652.D fiber can still be used. 4. Compared with metropolitan area networks, the transmission distance of provincial backbone networks is much longer than that of relay optical fibers, generally reaching tens to hundreds of kilometers. The peak bandwidth of the line interface will be increased to 400Gbps, using 400G gray optical modules or N 400G color optical modules. In terms of transmission, compared with traditional G.652 optical fiber, G.654.E optical fiber has obvious advantages in non-electrical relay distance, so low-attenuation G.654.E optical fiber is currently the best choice. 5. Data Center With the acceleration of network cloudification and enterprise cloud migration, data centers will become the focus of 5G development. As the demand for network bandwidth in data centers continues to increase, the internal transmission rate of the data center has evolved from 1G/10G to 25G/100G and 200G/400G. Multi-wavelength multiplexing technology and favorable bending performance that support high bandwidth performance are also required. At this time, bend-insensitive OM4 and OM5 multimode optical fibers have become popular optical fibers for data center construction. Summary: 5G promotes emerging technologies such as smart cities, smart cars, mobile Internet of Things, and virtual reality to enter our lives. All of this must be supported by a strong and stable network. To meet higher requirements and meet richer 5G applications, operators are re-planning and designing existing networks. Likewise, new network architectures also place new requirements on fiber optic cables. As the basic physical layer, optical fiber and cable must not only meet current application requirements, but also adapt to future development needs