Submarine optical cable line fault detection system and method

Abstract

The invention discloses a submarine optical cable line fault detection system and method, and relates to the field of ocean light transmission, the system comprises a C-OTDR, a circulator and a wave combiner arranged at each end point, and the C-OTDR comprises a sending end and a receiving end; the circulator is used for receiving detection light emitted by the C-OTDR sending end, emitting the detection light through the first submarine optical cable, receiving back Rayleigh scattering light returned by the first submarine optical cable and emitting the back Rayleigh scattering light; and thewave combiner is used for receiving the backward Rayleigh scattering light returned by the circulator and the second submarine optical cable and sending the backward Rayleigh scattering light to the receiving end of the C-OTDR for detection. According to the invention, comprehensiveness and accuracy of submarine optical cable fault diagnosis can be effectively ensured.

Description

technical field [0001] The invention relates to the field of ocean optical transmission, in particular to a submarine optical cable line fault detection system and method. Background technique [0002] Submarine optical cable is one of the most important communication media in the world at present. It has a history of more than 100 years and is an important link for the close interconnection of the world. [0003] Since the submarine optical cable system is an optical communication system applied in a special physical environment, compared with the terrestrial optical cable system, the system design of the submarine optical cable is more complicated and faces more technical difficulties. Submarine optical cables need to be suitable for laying (burying), recovery and offshore maintenance operations. Usually, they should be able to be correctly laid to the seabed under the specified standards, and can withstand the sea surface and seabed static pressure, temperature, wear, cor...

AI Technical Summary

Problems solved by technology

However, due to the existence of the shore amplifier and the isolator in the submarine repeater, the back Rayleigh scattered light generated by the probe light emitted by the C-OTDR in the submarine cable cannot directly return to the C-OTDR along the same submarine cable, marine communication The back Rayleigh scattered light of the first section of the submarine cable of the system will return to the C-OTDR along the same submarine cable, and the back Rayleigh scattered light of the remaining sections of the submarine cable will return to the C-OTDR through another submarine cable in the marine communication system. C-OTDR, because the back Rayleigh scattered light will return along different submarine optical cables, the existing detection method cannot detect the back Rayleigh scattered light returned from different submarine optical cables at the same time, so that the submarine optical cable Troubleshooting failure analysis

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