According to HMN Tech, the world’s first 16-fibre-pair repeatered submarine cable system, Hainan to Hong Kong Express (H2HE) cable system has successfully completed system commissioning and testing and is now ready for service as of September 3, 2021.

H2HE connects Hong Kong SAR with Hainan Province and Guangdong Province in Mainland China, with a total length of 675 kilometers. H2HE cable system facilitates a direct connection between Hainan and Hong Kong, underpinning Hainan as an emerging interconnection hub in the Asia-Pacific region.

H2HE Cable Route
H2HE Cable Route, Image Credit: HMN Tech


The 16 fibre pair network design incorporates HMN Tech’s next generation space-division multiplexing (SDM) technology to achieve a system capacity of over 300 Tbps, sufficient to transmit 57,000 high-definition movies every second.

This is a milestone in technological innovation, as constraints associated with submersible plant have historically limited systems to eight or twelve fibre pairs. HMN Tech’s R&D team has achieved this significant breakthrough by improving circuit conversion efficiency, optimising submersible plant structures and system integration techniques.

Overcoming a multitude of challenges throughout the entire turnkey delivery process, from design to product manufacturing, system integration to marine installation is critical to bring the concept of a repeatered 16 fibre pair solution to reality. This success further strengthens HMN Tech’s position to achieve greater technological advances in the near future.

16 Fiber Pair Submarine Repeater
16 Fiber Pair Submarine Repeater, Image Credit: HMN Tech


"We are delighted to partner with forward-thinking customers such as China Mobile, to successfully deliver the first 16 fibre pair submarine cable system that is a milestone in the industry," stated Ma Yanfeng, Executive Vice President. "HMN Tech remains committed to developing reliable innovative technology that not only enhances our value proposition but also promotes industry evolution and accelerates the world’s digital transformation.”