In this trial, leveraging the expertise of KDDI Research, a trial environment was established for an optical submarine cable system incorporating an optical circuit that enables remote monitoring with multicore optical fibre. Within this trial environment, Anritsu's optical pulse tester "Coherent OTDR (Coherent Optical Time Domain Reflectometer)  MW90010B”  was used to confirm the ability to measure optical path characteristics such as fault location and fiber loss profile, which is essential for the operation and maintenance of submarine cables.

The companies say this achievement makes it possible to remotely visualise the quality and faults of multicore optical fibre, which had previously been difficult, greatly enhancing the reliability and operational efficiency of optical submarine cables.

 Both companies will unveil these achievements at “The 51st European Conference on Optical Communication (ECOC 2025)”, one of the world's largest international conferences on optical communications, to be held in Denmark from September 28 to October 2, 2025.