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The Benefits of Remotely Operated OTDRs for Submarine Cable Deployment, Fiber Monitoring and Restoration

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The Benefits of Remotely Operated OTDRs for Submarine Cable Deployment, Fiber Monitoring and Restoration

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  • Author: Olivier Plomteux
This article discusses application and use of classical OTDRs for remote control of submarine cable installation and fault managementrelated activities. It presents an out-of-the-box monitoring and remote test solution that can be installed at the terminal stations of unrepeated links of up to 400 km. For links equipped with repeaters, the solution tests up to the first repeater, or up to 250 km if a fiber is passively dedicated to OTDR-testing purposes. An attenuation decrease of a few tenths of a decibel can be detected and localized and tracked down, and cuts can be localized with meter-level accuracy in terms of cable/fiber sheath length. Extra loss incurred to a section can also be detected and reported in seconds following the event.

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