China's Hengtong Optic-Electric and Zhejiang Unicom Build First 400G Provincial Hollow-Core Fiber Line

en.Wedoany.com Reported - Hengtong Optic-Electric and Zhejiang Unicom have jointly built the country's first 400G provincial backbone hollow-core fiber transmission line, which has been fully completed and put into trial commercial use. Leveraging Zhejiang Unicom's provincial backbone network, this line provides a dedicated transmission channel for high-speed computing and large-capacity data services, advancing hollow-core fiber technology from technical trials to large-scale commercial deployment in provincial backbone networks.

The entire line uses Hengtong Optic-Electric's self-developed anti-resonant hollow-core fiber and supporting optical cable products. Unlike traditional fibers that rely on quartz glass for light guidance, this product transmits optical signals through microstructured air channels, reducing network transmission latency by 33% compared to traditional fibers. At the 1550nm operating window, the line's link transmission loss is below 0.1dB/km, addressing the long-standing nonlinear effect issues in 400G and higher ultra-high-speed transmissions.

The deployment of Zhejiang Unicom's 400G provincial hollow-core fiber line supports various high-speed data interactions and latency-sensitive services, providing a network foundation for the integrated construction of the Yangtze River Delta network and driving the development of the regional digital industry.

Hengtong Optic-Electric has completed full-chain technical breakthroughs in hollow-core fiber topology design, ultra-precision manufacturing processes, and field splicing engineering, achieving dual performance improvements in ultra-large capacity and low latency. The stable operation of this line helps Zhejiang Unicom build a differentiated all-optical network for the 5G-A and 6G eras, strengthening the capabilities of next-generation information infrastructure.

Hengtong Optic-Electric stated that it will closely follow operators' evolution toward 800G and 1.6T ultra-high-speed networks, continuously advancing the industrialization and engineering of hollow-core fiber technology, with the goal of achieving a next-generation ultra-high-speed all-optical network featuring a single-fiber capacity of 1.6Tb/s and a per-kilometer latency below 3.8μs.

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