Google's new Dunant transatlantic submarine cable system has been declared ready for service.
Dunant is the first long-haul subsea cable to feature a 12 fiber pair space-division multiplexing (SDM) design, which will enable it to deliver record-breaking capacity of 250 terabits per second (Tbps) across the Atlantic Ocean. Subcom was the prime contractor for the project.
SubCom is the first to market using SDM technology to increase cable capacity in a cost-effective manner with additional fiber pairs (twelve, rather than six or eight in past generations of subsea cables) and power-optimized repeater designs. While previous subsea cable technologies relied on a dedicated set of pump lasers to amplify each fiber pair, the SDM technology used in Dunant allows pump lasers and associated optical components to be shared among multiple fiber pairs. This ‘pump sharing’ technology enables more fibers within the cable while also providing higher system availability.
“Google is dedicated to meeting the exploding demand for cloud services and online content that continues unabated,” said Mark Sokol, senior director of Infrastructure, Google Cloud. “With record-breaking capacity and transmission speeds, Dunant will help users access content wherever they may be and supplement one of the busiest routes on the internet to support the growth of Google Cloud. Dunant is a remarkable achievement that would not have been possible without the dedication of both SubCom and Google’s employees, partners, and suppliers, who overcame multiple challenges this year to make this system a reality.”
“Our congratulations to Google on the completion of the Dunant submarine cable system,” said David Coughlan, CEO of SubCom. “It is a privilege to partner once again with Google to achieve a technology milestone that, not so long ago, was out of reach. Our companies not only delivered another well-provisioned, high-bandwidth, low-latency, and highly secure connection between the U.S. and Europe, but we did so during a global pandemic that required unprecedented levels of cooperation, flexibility, and dedication.”
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