An optical add-drop multiplexing optical splitter

Abstract

An optical add-drop multiplexing optical splitter, wherein the optical add-drop multiplexing optical splitter includes: a trunk input end, a branch input end, a trunk output end, a branch output end, an optical add-drop multiplexer, a An optical splitter, a first detection circuit, and a control circuit; the optical add-drop multiplexer includes an optical switch. The detection circuit is used to detect whether the main road fails, and in the case of a main road failure, the working mode is switched from the first working mode to the second working mode to realize the automatic disaster recovery of the main road and ensure the normal communication of the branch road. The above solutions realize the disaster recovery function without using the integrated amplifier. No manual intervention is required, the disaster recovery response speed is fast, the disaster recovery effect is improved, and the economic loss caused by the interruption of system business transmission is greatly reduced. The adopted optical switch device is small in size, requires little structural space, and has low structural design complexity, so that the structural complexity is reduced to reduce cost and improve reliability.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to an optical add-drop multiplexing optical splitter. Background technique [0002] Submarine optical branching unit (Branching Unit, BU) is the underwater equipment of the submarine optical transmission system. Its main function is to realize the fiber pair interconnection between the three ports of the BU through the connection configuration of the internal optical fiber of the BU. The cable is connected to the underwater optical amplifier to realize the business transmission between multiple sites in the submarine optical transmission system. The BU is the key equipment that constitutes the complex submarine optical transmission system. [0003] When the trunk and branch service transmission capacity of the submarine optical transmission system is relatively small, and due to the confidentiality requirements of service transmission, it is required that the service t...

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Problems solved by technology

[0007] The disaster recovery scheme of the OADM BU with integrated optical amplifier has the following disadvantages: 1. Although the ASE noise generated by the optical amplifier can compensate for the lost service signal optical power when a fault occurs, the noise optical power and the signal light will cause the service light to The optical signal-to-noise ratio of the signal is reduced, especially for long-distance optical transmission systems. The cost of the OADM BU system of the amplifier is high, the optical path is complicated, and the overall reliability of the product is reduced; 3. The structural space of the OADM BU integrated with the optical amplifier increases, and the structural design is complicated

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