Light waveband exchanging network node structure based on adjusting filter

Abstract

The invention request to protect a light-wave exchange network base on the adjustable filter, involves the photon system field of the optical communication techniques. Using the adjustable wave combiner and the adjustable wave separator, to support the exchange of the light-wave band, the light-wave band exchanging matrix and the wavelength exchanging matrix connect with the adjustable wave separator that comprises by the adjustable filter and the adjustable wave combiner, completes the optical information exchange at different wavelength range dynamically, realize the functions that the wavelength operating combine to the wave band and separate from the wave band, decrease the number of the exchange matrix port, save the network fund.

Description

Node structure of optical band switching network based on tunable filter technical field The invention relates to the field of photonic systems in the optical communication technology, in particular to the node structure of an optical band switching network, which is suitable for multi-granularity wavelength routing optical switching networks supporting band switching. Background technique At present, the switching on the optical fiber cross-connect (OXC) and optical add-drop multiplexing (OADM) is based on the wavelength of optical switching, and the switching on the service is completed by the router at the lower layer. With the continuous increase of service bandwidth requirements, the network node The number of input fibers and the number of wavelengths on each fiber are increasing, so the scale of the switching matrix on the node is also increasing, which causes a series of problems: the use of network equipment increases, and the scale of network nodes expands , the ...

AI Technical Summary

Problems solved by technology

At present, the switching on the optical fiber cross-connect (OXC) and optical add-drop multiplexing (OADM) is based on the wavelength of optical switching, and the switching on the service is completed by the lower-layer router. With the continuous increase of service bandwidth requirements, the network node The number of input fibers and the number of wavelengths on each fiber are increasing, so the scale of the switching matrix on the node is also increasing, which causes a series of problems: the use of network equipment increases, and the scale of network nodes expands , the cost of the network increases; the scale of management and control of network nodes increases, which makes management and control difficult; the reliability of operation decreases after the switch matrix is ​​enlarged, and it is difficult to upgrade and maintain, etc.

However, due to the fixed wavelength range that the optical multiplexer and optical demultiplexer can handle, the capacity and flexibility of the band switching of this node structure are limited. If the capacity of the band switching is to be increased, the network must be increased. The number of node optical multiplexers and optical demultiplexers (that is, increase the number of switching ports), which will inevitably increase the cost of network construction

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