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Restructurable optical add-drop multiplexer and wavelength cross connect

A multiplexer and wavelength switching technology, applied in the field of communication, can solve the problems of ROADM cost increase, high development cost, and complex control, etc., and achieve the effect of low cost, simple implementation, and cost reduction

Active Publication Date: 2012-09-26
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventors found that the prior art has at least the following problems: the cost of ROADM is increased due to the large number of WSS integrated devices in the upper and lower wave modules, complicated control and high development costs

Method used

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  • Restructurable optical add-drop multiplexer and wavelength cross connect
  • Restructurable optical add-drop multiplexer and wavelength cross connect
  • Restructurable optical add-drop multiplexer and wavelength cross connect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] refer to figure 1 , figure 1 It is a schematic structural diagram of an embodiment of a reconfigurable optical add-drop multiplexer ROADM provided in Embodiment 1 of the present invention;

[0042] The ROADM includes: a line-side wavelength switching module 11, a wave adding module 22, and a wave dropping module 33, and the line side wavelength switching module 11 is respectively connected to the wave adding module 22 and the wave dropping module 33 through optical fibers;

[0043] The wave adding module 22 includes an adjustable multiplexer 221, a first optical switch 222, and a transmitter 223; the adjustable multiplexer 221 is connected to the first optical switch 222, and the first optical switch 222 passes through The optical fiber is connected to the transmitter 223; the first optical switch 222 is used to connect the optical fiber wavelength sent by the transmitter 223 to the adjustable multiplexer 221; the adjustable multiplexer 221 is used to Multiplexing the...

Embodiment 2

[0048] refer to figure 2 , figure 2 It is a schematic structural diagram of an embodiment of a reconfigurable optical add-drop multiplexer ROADM provided in Embodiment 2 of the present invention.

[0049] For the M-dimensional ROADM, the ROADM includes: a line-side wavelength switching module 11, an ADD module 22 and a DROP module 33, and the line-side wavelength switching module 11 is connected to the ADD module 22 and the DROP module 33 respectively through an optical fiber; Wherein, the dimension of the ROADM refers to the number of directions connected to the ROADM, and the M is a positive integer.

[0050] The line-side wavelength switching module 11 includes 2M WSSs, each two WSSs form a wavelength switching sub-module in one direction (not shown in the figure), and the 2M WSSs respectively form wavelength switching sub-modules in M ​​directions. The wavelength switching sub-module in each direction is composed of 1 WSS with 1×N structure and 1 WSS with N×1 structure, ...

Embodiment 3

[0070] refer to image 3 , image 3 is a schematic structural diagram of an embodiment of a reconfigurable optical add-drop multiplexer ROADM provided in Embodiment 3 of the present invention; wherein, image 3 Take the 3D ROADM as an example for illustration. The dimension of ROADM mentioned above refers to the number of directions connected by ROADM, such as image 3 As shown, a 3D ROADM connects east, north and west directions.

[0071] The ROADM includes: a line-side wavelength switching module 11 , an ADD module 22 and a DROP module 33 , and the line-side wavelength switching module 11 is respectively connected to the ADD module 22 and the DROP module 33 through optical fibers.

[0072] The line-side wavelength switching module 11 includes 6 WSSs, and every two WSSs form a wavelength switching sub-module in one direction, and the 6 WSSs form east, north and west wavelength switching sub-modules respectively. The wavelength switching sub-module in each direction is sim...

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Abstract

An embodiment of the invention provides a restructurable ROADM (optical add-drop multiplexer) and WXC (wavelength cross connect), and relatest to the field of communications, the ROADM comprises a line side wavelength switching module, an upper wave module, and a lower wave module; the upper wave module comprises a tunable multiplexer, a first optical switch and a transmitter; the first optical switch is used for connecting the fiber optical wavelength transmitted by the transmitter to the tunable multiplexer; the tunable multiplexer is used for multiplexing the received fiber optical wavelength, generating a WDM optical signal for wavelength division multiplexing, and outputting the WDM optical signal to the line side wavelength switching module; the lower wave module comprises a tunable demultiplexer, a second optical switch and a receiver, the tunable demultiplexer is used for demultiplexing the WDM optical signal from the line side wavelength switching module and outputting the signal through demultiplexing to the second optical switch, and the second optical switch is used for connecting the fiber optical wavelength through demultiplexing to the receiver. The embodiment of the invention reduces cost of ROADM.

Description

technical field [0001] The invention relates to the communication field, in particular to a reconfigurable optical add / drop multiplexer and a wavelength cross connector. Background technique [0002] With the rapid development of ROADM (Reconfigurable Optical Add-Drop Multiplexer, reconfigurable optical add-drop multiplexer) technology, with Colorless (wavelength-independent) characteristics, Directionless (direction-independent) characteristics and Contentionless (no wavelength conflict) characteristics ROADM (abbreviated as CDC ROADM) is the development direction of the future ROADM architecture. Among them, Colorless means that any port can output any wavelength; Directionless means that any wavelength can be scheduled to any direction; Contentionless means that when the same wavelength needs to be added or dropped locally in multiple directions at the same time, no wavelength conflict will occur. [0003] The existing CDC ROADM architecture includes: line-side wavelengt...

Claims

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Application Information

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IPC IPC(8): H04J14/02G02B6/293
CPCG02B6/293H04J14/0217H04J14/0212H04J14/02H04J14/02122
Inventor 张光勇陈波
Owner HUAWEI TECH CO LTD
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