Automatic optical fiber switching device for intensive wavelength division multiplexing system

Abstract

The invention relates to a switching device for an intensive wavelength division multiplexing system, in particular to an automatic optical fiber switching device used in an intensive wavelength division multiplexing system. According to the structural key point, the automatic optical fiber switching device comprises a spare optical fiber, a first optical branching device, a first optical power monitoring module, an automatic protection module for an optical path and a first optical switch module, wherein the first optical branching device and the first optical switch module are connected in a main optical fiber line in series in sequence; the optical signal output end of the first optical branching device is connected with the automatic protection module for an optical path by the first optical power monitoring module; and the spare optical fiber is connected to the switching end of the first optical switch module. The switching device has the advantages that the optical path is quickly switched, stable and safe communication is guaranteed, the potential safety hazard of node failure can be eliminated, the self-healing system of a loop network can be prevented from collapsing, a smooth traffic channel is ensured, influence on users can be reduced, and data guarantee is provided for electric power safety production.

Description

technical field [0001] The invention relates to a switching device for a dense wavelength division multiplexing system, in particular to an optical fiber automatic switching device in a dense wavelength division multiplexing system. Background technique [0002] The transmission network is the most important basic network in the communication network. The focus of the transmission network is to develop the optical fiber communication network, and the construction of the optical cable is the foundation of the optical fiber communication network. At present, in the construction of the provincial network and the regional backbone optical cable circuit, the main construction has The overhead ground wire composite optical cable (OPGW) or metal-free self-supporting optical cable (ADSS) featured in the power system forms the backbone DWDM+SDH optical fiber ring network communication network of Fujian Electric Power. [0003] Among them, the construction of OPGW and ADSS is limited ...

AI Technical Summary

Problems solved by technology

[0005] 1. The DWDM+SDH optical fiber ring network communication network of the provincial network is affected by the technical characteristics of the WDM optical link itself that can only use 2-core optical cables and the long length of the optical cable, making it concentrated on the weakness of resisting N-2 faults. This weak problem is mainly manifested in: A. The backup communication systems (mainly 2M channels provided by 34M PDH digital microwave and 155M regional optical network interconnection) cannot fully provide sufficient bandwidth; B. The current network cannot resist two points of interruption, There is a potential safety hazard of WDM node failure. Once the WDM node fails, the important business (power production and management business) information of these sites will not be delivered to the provincial company, which will bring serious consequences.

[0006] 2. Due to the development needs of the power network, these OPGWs are often interrupted due to power line maintenance, and sometimes need to be added or reconnected to a new substation with the power line being disconnected, which will inevitably cause a certain wavelength division link (a multiplex section, namely OTM segment (or Link, Span) is interrupted, causing the self-healing system of the SDH ring network carried by it to collapse and become a chain structure

[0007] 3. Due to the current period of rapid urban development, overhead optical cables often need to be changed to buried methods, and the optical cables are also temporarily cut. At the same time, unexpected optical cable interruptions (such as being hung up by super-high vehicles, being stolen, cables explosion, etc.)

[0008] 4. In the case of WDM ring network optical cable interruption, the interruption of OPGW is planned, while urban optical cable interruption is mostly uncertain. Once there are two interruptions in the ring network optical cable, there will inevitably be two interruption points far away from the province. The company's communication node lost contact with the provincial company, causing a large number of business channels to be interrupted, affecting power safety production and enterprise management

[0009] The reason for the above problems is that there are two directions for the urban optical cables from the dense wavelength division system to the various ground adjustments, and only ordinary optical cables in these two directions can be used. 2-core pigtail

In addition, ordinary optical cables entering the city have the characteristics of multi-directional and multi-routing, but they cannot be used effectively by the WDM system at the same time.

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