China Mobile ha lanciato la prima rete di prova della tecnologia di trasmissione in fibra ottica air-core 800G al mondo

A giugno 6, 024, China Mobile ha aperto la prima rete di prova della tecnologia di trasmissione in fibra ottica con nucleo in aria 800G a Shenzhen-Dongguan, Guangdong. The test was jointly completed by China Mobile and domestic optical fiber and cable and equipment manufacturers, and verified the performance of the anti-resonant air-core fiber under the influence of various conditions such as traction, extrusion, water vapor, and outdoor splicing in the real environment, and achieved a number of core technical indicators such as the fusion loss of air-core and air-core fiber fusion as low as 0.05dB, the air-core-solid connection less than 0.3dB, and the loss of optical cable per kilometer after laying 0.6dB on the 20km link, all of which reached the international first-class level. The single-wavelength 800Gbps wide-spectrum optical transmission system is used to further realize the bidirectional 128Tb/s ultra-large capacity transmission test of 20km single-core fiber based on air-core fiber, which proves that the anti-resonant air-core fiber has the feasibility of deployment in complex pipe network environment, which is an important milestone for the air-core fiber and transmission system industry from technical prototype to industrialization.

Based on the new air light guide mechanism, hollow-core optical fiber can break through the two physical bottlenecks of solid-core optical fiber, the capacity limit and the delay limit, and has obvious performance advantages in backbone and data center transmission, which is a disruptive technology for next-generation optical communication. First, it can serve latency-sensitive high-value private line services, second, it can greatly optimize the latency level between computing hubs, and third, it is expected to provide technical support for the distributed deployment of intelligent computing centers in the future.

In questa prova, the first preparation of hybrid optical cable of hollow core fiber and solid core fiber was completed based on the reverse resonant hollow core fiber, and the mechanical properties such as tensile, flattened, bending, impact, and torsion can basically meet the requirements of the general cable standard. Allo stesso tempo, during the laying period, Typhoon “Maris” passed through Dongguan, Shenzen, and China Mobile, together with the domestic industrial chain, carried out the anti-resonant air-core optical fiber and cable technology test for the first time under the complex pipe network environment and extremely bad weather conditions, overcoming unfavorable factors to complete the opening of the typical financial special line in the Greater Bay Area by the air-core optical cable, which can optimize the transmission delay of the optical link by more than 30%.

Since 2018, China Mobile has worked with domestic partners to carry out research on anti-resonant hollow-core optical fiber and its system technology. China Mobile Research Institute has made a series of technological innovations in nonlinear coefficient measurement methods, ultra-high power and ultra-high-speed transmission damage models and new dimension development, published a number of academic papers at OFC/ECOC, the international top conference on optical communications, and led the research on industry standards. In futuro, China Mobile will further focus on the loss reduction of air-core optical fiber and the design of optical fiber structure for large-scale preparation, adopt the mode of collaborative research and development of ultra-800G transmission system and optical fiber design to carry out key technical research and verification, accelerate the development of anti-resonant air-core optical fiber and its optical communication system, actively drive the evolution of the future all-optical network technology system, the development of the industrial chain, and the birth of the application ecology, and continue to inject new momentum into the development of the digital economy.