Huawei Marine achieves breakthrough in unrepeatered system with a transmission distance of up to 620 Km

Huawei Marine Networks Co., Ltd. (Huawei Marine) today announced a breakthrough with a 100G ultra-long unrepeatered system that has achieved a record transmission distance of up to 627km in a laboratory test in Beijing.

While installing and maintaining repeatered systems remain expensive, ultra-long unrepeatered system is a promising technology due to ease of installation and lower capital costs. Based on Huawei's advanced 100G technology, Enhanced Raman Amplifier and ROPA (remote optical pump amplifier), Huawei Marine has achieved a major breakthrough in unrepeatered submarine cable system transmission.

"Huawei Marine is committed to investing in the development of high-performance technology," said Zhang Shigui, Vice President of Technology, Huawei Marine. "This breakthrough in unrepeatered system marks another milestone for Huawei Marine and further demonstrates our technical expertise and ability to deliver innovative solutions to address our customer needs"

Combining PDM BPSK modulation, ODSP and third-generation soft decision technology, Huawei Marine's advanced 100G transmission technology addresses the issue of high dependence on the dispersion compensation module and low PMD while reducing the requirement of OSNR. At the same time, the coding gain has been improved which greatly enhances 100G transmission capability while increasing transmission distance.

The laboratory test was performed on a 100G/s channel over an ultra low loss optical fiber by using Huawei Marine's self-developed enhanced Raman amplifier (ERPC) and remote optical pumping amplifier (ROPA). These advanced technologies come with a high efficiency of gain bandwidth and an extremely low noise factor, therefore greatly enhancing the transmission capability of a 100G unrepeatered system.

Over the past eight years, Huawei Marine has established a leading position in unrepeatered submarine cabls system technology. This has included the deployment and commercial operation of numerous systems; of which the longest 10G and 100G unrepeatered transmission distances reached 426km and 380km respectively. This breakthrough, when used commercially, will enable Huawei Marine to provide greater competitive and cost-effective solutions to customers.

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