Recently, the world's first existing network air core fiber single wave 1.2Tb/s ultra long single span relay free wavelength division transmission system test, jointly completed by China Telecom and Changfei Company, two co built and supported units of the National Key Laboratory of Advanced Manufacturing and Application Technology of Fiber Optic Cables, and DeKeli, has been successfully completed.

This experiment is based on the world's longest cross-border commercial air core optical cable, using an independently proposed single wave rate and channel power optimization scheme. With only EDFA amplification, a single span relay free transmission of 206.5km and 51.3Tb/s was achieved, breaking the global record for capacity distance product of a single span relay free wavelength division transmission system without a remote pump amplifier.

Relying on the ultra high speed multi band transmission verification capability of China Telecom's "Cloud Network Integration Pilot Platform" and the innovative platform of the "National Key Laboratory of Advanced Manufacturing and Application Technology for Fiber Optic Cables", the team has overcome the problem of high-power transmission for the first time in the existing network air core fiber optic system.



近日，由"光纤光缆先进制造与应用技术全国重点实验室"两个共建依托单位——中国电信与长飞公司，联合德科立共同完成的全球首个现网空芯光纤单波1.2Tb/s超长单跨无中继波分传输系统试验圆满成功。

本次试验基于全球最长跨境商用空芯光缆，采用自主提出的单波速率与波道功率优化方案，仅通过EDFA放大，便实现了206.5km、51.3Tb/s的单跨无中继传输，一举打破了无遥泵放大器条件下的单跨无中继波分传输系统容量距离积全球纪录。

依托中国电信"云网融合中试平台"的超高速多波段传输验证能力和"光纤光缆先进制造与应用技术全国重点实验室"创新平台，团队首次在现网空芯光纤系统中攻克了大功率传输难题。




At the system level, the project team proposed a single wave rate adaptive adjustment and flexible allocation scheme for channel power, achieving mixed transmission of multiple rates, multiple channel intervals, and multiple single wave powers.

At the device level, the project team adopted a "dual gain unit cascade" high-power amplifier architecture and multi-element doping design to develop a high-power amplifier with high gain flatness and output power of up to 33.5dBm.

The success of this experiment fully demonstrates the enormous potential of the fusion application of hollow fiber and high-power amplification technology.



在系统层面，项目组提出了单波速率自适应调节与波道功率灵活分配方案，实现了多速率、多通道间隔、多单波功率的混合传输。

在设备层面，项目团队采用"双增益单元级联"高功率放大架构及多元素掺杂设计，研制出高增益平坦度、输出功率高达33.5dBm的高功率放大器。

本次试验的成功，充分展现了空芯光纤与高功率放大技术融合应用的巨大潜力。

(Using AI translation)

（使用AI翻译）