Wave divided multiplexing line dural fibre optical multiplexing section protecting apparatus

Abstract

The present invention discloses a two-fibre optical multiplexing section protection equipment for wavlength division multiplexed circuit. It includes a pair of optical transmitting and receiving ports, a pair of working optical-fibre ports, optical branching device, optical coupler, optical monitoring unit, optical switch which can select optical signal of different input ports according to the output of optical monitoring unit to make output, input port of said optical switch is connected with optical received working signal and optical received protection signal in said device and its output port is connected with optical receiving port of said device and a pair of optical interface units connected with working optical fibre, said optical interface unit can be optical circulator, optical interlacing device or waveband separator.

Description

(1) Technical field [0001] The invention relates to an optical multiplexing section protection (OMSP) device in a wavelength division multiplexing system, in particular to a two-fiber optical multiplexing section protection device for the wavelength division multiplexing system. (2) Background technology [0002] With the development of technology and the sharp increase of communication capacity demand, wavelength division multiplexing (WDM) transmission technology has become an important and commonly used solution from long-distance backbone network to metropolitan area network. The WDM network bears a large amount of business. For example, the capacity of an 80Gb / s system is equivalent to 1 million telephone lines, and the Tb / s level system is increased to tens of millions of lines. Therefore, the security of the WDM network is particularly important. Importantly, people strive to build various protection systems for the safe and stable operation of the network. [0003] ...

AI Technical Summary

Problems solved by technology

[0005] The advantage of the optical fiber redundancy method lies in its simplicity. It does not require any protocol and any unit not directly related to any fault in the system does not need to participate in protection switching. However, the disadvantage of this protection method is that it requires redundant optical fiber transmission protection channels. For dual Fiber bidirectional transmission system, this protection method requires four optical fibers, and the additional two optical fibers are used to transmit protection signals

[0006] This shortcoming is particularly obvious when this protection method is used in long-distance transmission systems, mainly because the cost of laying optical fibers in long-distance transmission systems is very expensive; very very expensive

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