Xtera Revamps HUGO Subsea Cable System with Next Gen Repeater

By CIOReview | Monday, June 29, 2015

DALLAS, TX: Xtera Communications, provider of optical networking solutions integrates its next generation repeater into the High capacity Undersea Guernsey Optical-fiber (HUGO) subsea cable system connecting Porthcurno (UK), Guernsey (UK) and Lannion (France). Being its first deployment in a commercial system, the project is also Xtera's opening step for the first Raman-based submarine repeater deployment.

HUGO initially was not based on repeater system which caused it high loss of cable. The new platform eliminating these barriers develops an extended lifetime and high capacity system with minimal disruptions to the service. The repeater is a redeployment of parts of the decommissioned Gemini system.

By replacingerbium-doped fiber amplifiers with Raman amplification in the repeater, Xtera offers a better spectrum with optical noise performance when compared to the former.Raman amplifier, an optical amplifier based on Raman gain, which results from the effect of stimulated Raman scattering (SRS), the phenomena of inelastic scattering of a photon.

"Due to its spectrum flexibility, Raman amplification allows us to fine-tune the repeater performance with respect to the optical characteristics of the line fiber, which was optimized for 20-year-old transmission technologies, thus maximizing the system capacity," assures Stuart Barnes, Senior Vice President and General Manager of Xtera Submarine Business.

Xtera’snew repeater gives added advantage for building new subsea cable systems or upgrading existing wet plant, including repeater replacement or re-lay of decommissioned cable systems.