CN102696194B

CN102696194B - Restructurable optical add-drop multiplexer and wavelength cross connect

Info

Publication number: CN102696194B
Application number: CN201180001349.1A
Authority: CN
Inventors: 张光勇; 陈波
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2011-07-22
Filing date: 2011-07-22
Publication date: 2014-12-10
Anticipated expiration: 2031-07-22
Also published as: WO2012159341A1; CN102696194A

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

Reconfigurable optical add/drop multiplexer and wavelength cross-connect

Technical field

The present invention relates to the communications field, particularly a kind of reconfigurable optical add/drop multiplexer and wavelength cross-connect.

Background technology

Along with ROADM (Reconfigurable Optical Add-Drop Multiplexer, reconfigurable optical add/drop multiplexer) developing rapidly of technology, the ROADM (referred to as CDC ROADM) that possesses Colorless (Wavelength-independent) characteristic, Directionless (orientation independent) characteristic and Contentionless (without Wavelength conflict) characteristic is the developing direction of following ROADM framework.Wherein, Colorless refers to arbitrary port and can export any wavelength; Directionless refers to any wavelength can be dispatched to any direction; Contentionless refers to multiple directions need to, when the upper and lower identical wavelength in this locality, can there is not Wavelength conflict simultaneously.

Existing CDC ROADM framework comprises: line side wavelength Switching Module, upper ripple ADD module and lower ripple DROP module.Line side wavelength Switching Module is connected with described lower ripple DROP module with described upper ripple ADD module respectively by optical fiber; Wherein, described line side wavelength Switching Module can consist of a plurality of WSS (wavelength selective switch, wavelength-selective switches), and every two WSS form the wavelength commutator module of a direction; Described ADD module and described DROP module include WSS and optical switch, and described WSS is connected with described optical switch by optical fiber.

In realizing process of the present invention, inventor finds that prior art at least exists following problem: because the device that the WSS in upper and lower mode piece is integrated is more, control complexity, development cost is high, and the cost of ROADM is improved.

WSS of the prior art can export a plurality of wavelength at each port simultaneously, also makes the cost of WSS improve; In practical application, be in most cases unwantedly at each port, to export a plurality of wavelength simultaneously; Adjustable multiplexer in the present embodiment/adjustable demodulation multiplexer is not just to export a plurality of wavelength at each port simultaneously, but exports any one wavelength at arbitrary port, makes adjustable multiplexer/adjustable demodulation multiplexer than WSS cost of the prior art.

Realizing of adjustable multiplexer/adjustable demodulation multiplexer in the present embodiment is fairly simple, and its cost WSS cost of the prior art of comparing is low, has reduced accordingly the cost of ADD module and DROP module, thereby has made the cost of the ROADM in the present embodiment.

Summary of the invention

In order to reduce the cost of ROADM, the embodiment of the present invention provides a kind of reconfigurable optical add/drop multiplexer ROADM and wavelength cross-connect WXC.Described technical scheme is as follows:

A reconfigurable optical add/drop multiplexer ROADM, comprising: line side wavelength Switching Module, upper mode piece and lower mode piece, and described line side wavelength Switching Module is connected with described lower mode piece with described upper mode piece respectively by optical fiber;

Described upper mode piece comprises adjustable multiplexer, the first optical switch and transmitter; Described adjustable multiplexer is connected with described the first optical switch, and described the first optical switch is connected with described transmitter by optical fiber; Described the first optical switch is connected to described adjustable multiplexer for the fiber optic wavelength that described transmitter is sent; Described adjustable multiplexer is multiplexing for the fiber optic wavelength receiving is carried out, and generates wave division multiplexing WDM light signal, exports described wdm optical signal to described line side wavelength Switching Module;

Described lower mode piece comprises adjustable demodulation multiplexer, the second optical switch and receiver; Described adjustable demodulation multiplexer is connected with described the second optical switch, and described the second optical switch is connected with described receiver by optical fiber; Described adjustable demodulation multiplexer is for the wdm optical signal from described line side wavelength Switching Module is carried out exporting described the second optical switch to after demultiplexing, and described the second optical switch is for being connected to described receiver by the fiber optic wavelength after described demultiplexing;

Wherein, described the first optical switch comprises the first input optical fibre array, the first collimation unit and the first crosspoint;

Described adjustable multiplexer comprises the second crosspoint, the second collimation unit, multiplexer and the first output optical fibre array;

Wherein, the fiber optic wavelength that described the first input optical fibre array sends for receiving described transmitter, exports described fiber optic wavelength to the first collimation unit; Described the first collimation unit is used for receiving described fiber optic wavelength, exports described fiber optic wavelength collimation to described the first crosspoint; Described the first crosspoint, for according to control command, regulates the micro-reflector that described fiber optic wavelength is corresponding, exports described fiber optic wavelength to described the second crosspoint; Described the second crosspoint is used for regulating light beam reflection angle, exports described fiber optic wavelength to described the second collimation unit; Described the second collimation unit is for exporting described fiber optic wavelength collimation to described multiplexer; Described multiplexer is multiplexing for described fiber optic wavelength is carried out, and generates and export wavelength division multiplexing wdm optical signal to described the first output optical fibre array; Described the first output optical fibre array is used for exporting described wdm optical signal to described line side wavelength Switching Module;

Described adjustable demodulation multiplexer comprises the second input optical fibre array, demodulation multiplexer, the 3rd collimation unit and the 3rd crosspoint;

Described the second optical switch comprises the 4th crosspoint, the 4th collimation unit and the second output optical fibre array;

Wherein, the wdm optical signal that described the second input optical fibre array sends for receiving described line side wavelength Switching Module, exports described wdm optical signal to demodulation multiplexer; Described demodulation multiplexer is used for receiving described wdm optical signal, and described wdm optical signal is carried out to demultiplexing, and the fiber optic wavelength after described demultiplexing is projected to described the 3rd collimation unit; Described the 3rd collimation unit is for outputing to described the 3rd crosspoint by the fiber optic wavelength collimation after described demultiplexing; Described the 3rd crosspoint, for according to control command, regulates the micro-reflector that described fiber optic wavelength is corresponding, exports described fiber optic wavelength to described the 4th crosspoint; Described the 4th crosspoint is used for regulating light beam reflection angle, exports described fiber optic wavelength to described the 4th collimation unit; Described the 4th collimation unit is for exporting described fiber optic wavelength coupling to described the second output optical fibre array; Described the second output optical fibre array is used for exporting described fiber optic wavelength to described receiver.

A wavelength cross-connect WXC, comprising:

The first input optical fibre array, the first collimation unit, the first crosspoint, the second crosspoint, the second collimation unit, multiplexer and the first output optical fibre array;

Described the first input optical fibre array, the first collimation unit, the first crosspoint, the second crosspoint, the second collimation unit, multiplexer and the first output optical fibre array are integrated in described WXC;

Described the first input optical fibre array is used for receiving fiber optic wavelength, exports described fiber optic wavelength to the first collimation unit;

Described the first collimation unit is used for receiving described fiber optic wavelength, exports described fiber optic wavelength collimation to described the first crosspoint;

Described the first crosspoint, for according to control command, regulates the micro-reflector that described fiber optic wavelength is corresponding, exports described fiber optic wavelength to described the second crosspoint;

Described the second crosspoint is used for regulating light beam reflection angle, exports described fiber optic wavelength to described the second collimation unit;

Described the second collimation unit is for exporting described fiber optic wavelength collimation to described multiplexer;

Described multiplexer is multiplexing for described fiber optic wavelength is carried out, and generates and export wavelength division multiplexing wdm optical signal to described the first output optical fibre array;

Described the first output optical fibre array is used for exporting described wdm optical signal.

A wavelength cross-connect WXC, comprising:

The second input optical fibre array, demodulation multiplexer, the 3rd collimation unit, the 3rd crosspoint, the 4th crosspoint, the 4th collimation unit and the second output optical fibre array;

Described the second input optical fibre array, demodulation multiplexer, the 3rd collimation unit, the 3rd crosspoint, the 4th crosspoint, the 4th collimation unit and the second output optical fibre array are integrated in described WXC;

Described the second input optical fibre array is used for receiving wdm optical signal, exports described wdm optical signal to demodulation multiplexer;

Described demodulation multiplexer is used for receiving described wdm optical signal, and described wdm optical signal is carried out to demultiplexing, and the fiber optic wavelength after described demultiplexing is projected to described the 3rd collimation unit;

Described the 3rd collimation unit is for being collimated to described the 3rd crosspoint by the fiber optic wavelength after described demultiplexing;

Described the 3rd crosspoint, for according to control command, regulates the micro-reflector that described fiber optic wavelength is corresponding, exports described fiber optic wavelength to described the 4th crosspoint;

Described the 4th crosspoint is used for regulating light beam reflection angle, exports described fiber optic wavelength to described the 4th collimation unit;

Described the 4th collimation unit is for exporting described fiber optic wavelength coupling to described the second output optical fibre array;

Described the second output optical fibre array is used for exporting described fiber optic wavelength.

The beneficial effect of the technical scheme that the embodiment of the present invention provides is: in the present embodiment the upper mode piece of ROADM and the adjustable multiplexer/adjustable demodulation multiplexer in lower mode piece realize fairly simple, its cost WSS cost of the prior art of comparing is low, reduce accordingly the cost of ADD module and DROP module, thereby made the cost of the ROADM in the present embodiment.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of reconfigurable optical add/drop multiplexer ROADM embodiment that provides of the embodiment of the present invention 1;

Fig. 2 is the structural representation of a kind of reconfigurable optical add/drop multiplexer ROADM embodiment that provides of the embodiment of the present invention 2;

Fig. 3 is the structural representation of a kind of reconfigurable optical add/drop multiplexer ROADM embodiment that provides of the embodiment of the present invention 3;

Fig. 4 is the structural representation of a kind of reconfigurable optical add/drop multiplexer ROADM embodiment that provides of the embodiment of the present invention 4;

Fig. 5 is the structural representation of a kind of wavelength cross-connect WXC embodiment of providing of the embodiment of the present invention 5;

Fig. 6 is the structural representation of a kind of wavelength cross-connect WXC embodiment of providing of the embodiment of the present invention 6;

Fig. 7 is the first structural representation of a kind of wavelength cross-connect WXC embodiment of providing of the embodiment of the present invention 7;

Fig. 8 is the second structural representation of a kind of wavelength cross-connect WXC embodiment of providing of the embodiment of the present invention 7.

Embodiment

The embodiment of the present invention provides a kind of reconfigurable optical add/drop multiplexer ROADM and wavelength cross-connect WXC.

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.

Embodiment 1

With reference to figure 1, Fig. 1 is the structural representation of a kind of reconfigurable optical add/drop multiplexer ROADM embodiment that provides of the embodiment of the present invention 1;

Described ROADM comprises: line side wavelength Switching Module 11, upper mode piece 22 and lower mode piece 33, and described line side wavelength Switching Module 11 is connected with described lower mode piece 33 with described upper mode piece 22 respectively by optical fiber;

Described upper mode piece 22 comprises adjustable multiplexer 221, the first optical switch 222 and transmitter 223; Described adjustable multiplexer 221 is connected with described the first optical switch 222, and described the first optical switch 222 is connected with described transmitter 223 by optical fiber; Described the first optical switch 222 is connected to described adjustable multiplexer 221 for the fiber optic wavelength that described transmitter 223 is sent; Described adjustable multiplexer 221 is multiplexing for the fiber optic wavelength receiving is carried out, and generates wave division multiplexing WDM light signal, exports described wdm optical signal to described line side wavelength Switching Module 11;

Described lower mode piece 33 comprises adjustable demodulation multiplexer 331, the second optical switch 332 and receiver 333; Described adjustable demodulation multiplexer 331 is connected with described the second optical switch 332, and described the second optical switch 332 is connected with described receiver 333 by optical fiber; Described adjustable demodulation multiplexer 331 exports described the second optical switch 332 for the wdm optical signal from described line side wavelength Switching Module 11 is carried out to after demultiplexing, and described the second optical switch 332 is for being connected to the fiber optic wavelength after described demultiplexing described receiver 333.

In the present embodiment the upper mode piece of ROADM and the adjustable multiplexer/adjustable demodulation multiplexer in lower mode piece realize fairly simple, its cost WSS cost of the prior art of comparing is low, reduce accordingly the cost of ADD module and DROP module, thereby made the cost of the ROADM in the present embodiment.

To facilitate understanding of the present embodiment of the invention, the M dimension ROADM that possesses CDC characteristic of take below described in the embodiment of the present invention is example, is described further.

Embodiment 2

With reference to figure 2, Fig. 2 is the structural representation of a kind of reconfigurable optical add/drop multiplexer ROADM embodiment that provides of the embodiment of the present invention 2.

For M dimension ROADM, ROADM comprises: line side wavelength Switching Module 11, ADD module 22 and DROP module 33, and described line side wavelength Switching Module 11 is connected with described DROP module 33 with described ADD module 22 respectively by optical fiber; Wherein, the dimension of described ROADM refers to the direction number that ROADM connects, and described M is positive integer.

Described line side wavelength Switching Module 11 comprises 2M WSS, and every two WSS form the wavelength commutator module (not shown) of a direction, and 2M WSS forms respectively the wavelength commutator module of M direction.The wavelength commutator module of each direction is comprised of the WSS of 11 * N structure and the WSS of 1 N * 1 structure, wherein, the WSS of 1 * N can be by any fiber optic wavelength array output in the wdm optical signal of input port to any output port, and the WSS of N * 1 can select the wdm optical signal of any one input port any fiber optic wavelength combination and the fiber optic wavelength combination of other input ports to merge rear output.The output port of the WSS of 1 * N of each direction is connected with any one input port of WSS and any one input port fiber of DROP module of N * 1 of other directions respectively, also can retain (needn't limit concrete number) the output port free time need not, using its as protection port; Described protection port is the backup port after ADD/DROP module lost efficacy.Any one input port of the WSS of N * 1 of each direction is connected with any one output port optical fiber of ADD module, also can retain an input port as protection port, after losing efficacy in ADD/DROP module, provides backup port.Described line side Switching Module similarly to the prior art, can, with reference to associated description in prior art, not repeat them here for its Function and operation.

Described ADD module 22, comprises the adjustable multiplexer 221a of M 1 * N and the first optical switch 222a and N the transmitter 223 (TX, transmitter) of N 1 * M.

Wherein, described in each, first input port of adjustable multiplexer 221a is connected with the first optical switch 222a described in first by optical fiber, by that analogy, described in each, n the input port of adjustable multiplexer 221a is connected with n described the first optical switch 222a by optical fiber; Wherein, described n is less than or equal to N; Described in each, the first optical switch 222a connects a described TX 223 by optical fiber.

For described ADD module 22, the first optical switch 222a of described 1 * M is connected to any input port of the adjustable multiplexer 221a of 1 * N for the fiber optic wavelength that TX 223 is sent; The adjustable multiplexer 221a of described 1 * N, for the fiber optic wavelength receiving is carried out to multiplexing rear generation wdm optical signal, exports described wdm optical signal to line side wavelength Switching Module 11 from any output port.

Described DROP module 33, comprises the adjustable demodulation multiplexer 331a of M 1 * N and the second optical switch 332a and N the receiver 333 (RX, receiver) of N 1 * M.

Wherein, described in each, first output port of adjustable demodulation multiplexer 331a is connected with the second optical switch 332a described in first by optical fiber, by that analogy, described in each, n the input port of adjustable demodulation multiplexer 331a is connected with n described the second optical switch 332a optical fiber; Wherein, described n is less than or equal to N; Described in each, the second optical switch connects a described RX 333 by optical fiber.

For described DROP module, the adjustable demodulation multiplexer 331a of described 1 * N, for by the wdm optical signal demultiplexing from M dimension, is connected to the second optical switch 332a of 1 * M from any output port output; The second optical switch 332a of described 1 * M is for being connected to RX 333 by the fiber optic wavelength after described demultiplexing.

In the present embodiment, between described adjustable multiplexer 221a and described the first optical switch 222a, can not adopt optical fiber to connect, but described adjustable multiplexer 221a and described the first optical switch 222a are integrated into the first wavelength cross-connect WXC, accordingly, a described WXC is connected with described transmitter 223 optical fiber;

Between described adjustable demodulation multiplexer 331a and described the second optical switch 332a, also can not adopt optical fiber to connect, but described adjustable demodulation multiplexer 331a and described the second optical switch 332a are integrated into the 2nd WXC, accordingly, described the 2nd WXC is connected with described receiver 333 optical fiber.

It can be mechanical optical switch, microelectron-mechanical optical switch (MEMS (Micro-Electro-MechanicalSystems that described light opens the light, MEMS (micro electro mechanical system))), waveguide type optical switch and liquid crystal optical switch etc., also can be other forms of optical switch, the optical switch in the embodiment of the present invention be not limited to this;

Adjustable multiplexer 221a and adjustable demodulation multiplexer 331a in the present embodiment can export any one wavelength at arbitrary port.

Particularly, described adjustable multiplexer 221a and adjustable demodulation multiplexer 331a include AWG (Arrayed Waveguide Grating, array waveguide grating) and OXC (Optical Cross-Connect, optical cross connect); Described AWG and described OXC are integrated in one, and wherein, AWG substitutes the input optical fibre array of OXC; OXC adopts two-dimension plane structure, and interior lights element adopts space optics to realize interconnected.

Or described adjustable multiplexer 221a and adjustable demodulation multiplexer 331a include AWG and optical cross connect OXC; Described AWG is connected with described OXC by optical fiber.

Or described adjustable multiplexer 221a and adjustable demodulation multiplexer 331a include grating, fourier lense and OXC; Described grating, fourier lense and OXC are integrated in one, and wherein, grating and fourier lense substitute the input optical fibre array of OXC; OXC adopts two-dimension plane structure, and interior lights element adopts space optics to realize interconnected.

Or, described adjustable multiplexer 221a and adjustable demodulation multiplexer 331a adopt the principle based on micro-ring resonator to realize, the operation principle of wherein said micro-ring resonator is by controlling the refractive index of micro-ring waveguide, can realize the resonance of different wave length, thereby realizes output different wave length.

Or described adjustable multiplexer 221a and adjustable demodulation multiplexer 331a adopt the correlation technique of similar large port WSS to realize.

ROADM in the present embodiment possesses CDC characteristic, and ROADM possesses colorless characteristic, directionless characteristic and contentionless characteristic.Due to the colorless characteristic of adjustable multiplexer, adjustable demodulation multiplexer, optical switch (comprising the first optical switch and the second optical switch), so downloading the wavelength of (or ADD module is uploaded), DROP module there is colorless characteristic; Because DROP module can be downloaded the wavelength from any one direction in M direction, or ADD module can export any one direction in M direction to by uploading wavelength, needs the wavelength of downloading (or uploading) to have directionless characteristic; If have identical wavelength need to download in this locality (or uploading) in the 1st and M direction, can allocate by the control of optical switch, two identical wavelength are downloaded respectively to (or uploading) to different RX (or TX), i.e. contentionless characteristic.

Embodiment 3:

With reference to figure 3, Fig. 3 is the structural representation of a kind of reconfigurable optical add/drop multiplexer ROADM embodiment that provides of the embodiment of the present invention 3; Wherein, Fig. 3 be take 3 dimension ROADM and is described as example.The dimension of the above-mentioned ROADM mentioning refers to the direction number that ROADM connects, and as shown in Figure 3, one 3 dimension ROADM connects east, north, three, west direction.

Described ROADM comprises: line side wavelength Switching Module 11, ADD module 22 and DROP module 33, described line side wavelength Switching Module 11 is connected with described DROP module 33 with described ADD module 22 respectively by optical fiber.

Described line side wavelength Switching Module 11 comprises 6 WSS, and every two WSS form the wavelength commutator module of a direction, 6 WSS form respectively east orientation, north orientation and west to wavelength commutator module.The wavelength commutator module of each direction and the wavelength commutator module class in embodiment 2 seemingly, specifically can, with reference to associated description in embodiment 2, not repeat them here.

Described ADD module 22 comprises that the adjustable multiplexer 221b of 31 * 23 and the first optical switch 222b and 23 TX 223 of 23 1 * 3 form.

Wherein, described in each, first input port of adjustable multiplexer 221b is connected with the first optical switch 222b described in first by optical fiber, by that analogy, described in each, the 3rd of adjustable multiplexer 221b the input port is connected with the 3rd described the first optical switch 222b by optical fiber; Described in each, the first optical switch 222b connects a described TX 223 by optical fiber.

The function of described 1 * 23 adjustable multiplexer 221b and the first optical switch 222b of 1 * 3 and the function class of the described adjustable multiplexer 221a in embodiment 2 and the first optical switch 222a seemingly, specifically can reference example 2 in associated description, do not repeat them here.

Described DROP module 33 comprises that the adjustable demodulation multiplexer 331b of 31 * 23 and the second optical switch 332b and 23 RX 333 of 23 1 * 3 form.

Wherein, described in each, first output port of adjustable demodulation multiplexer 331b is connected with the second optical switch 332b optical fiber described in first, by that analogy, described in each, the 3rd of adjustable demodulation multiplexer 331b the output port is connected with the 3rd described the second optical switch 332b optical fiber; Described in each, the second optical switch 332b connects a described RX 333 by optical fiber.

The function class of adjustable demodulation multiplexer 331a and the second optical switch 332a described in the function of described 1 * 23 adjustable demodulation multiplexer 331b and the second optical switch 332b of 1 * 3 and embodiment 2 seemingly, specifically can, referring to associated description in embodiment 2, not repeat them here.

In the present embodiment, between described 1 * 23 adjustable multiplexer 221b and the first optical switch 222b of described 1 * 3, can not adopt optical fiber to connect, but described adjustable multiplexer 221b and described the first optical switch 222b are integrated into the first wavelength cross-connect WXC, accordingly, a described WXC is connected with described transmitter 223 optical fiber;

Between described 1 * 23 adjustable demodulation multiplexer 331b and the second optical switch 332b of described 1 * 3, also can not adopt optical fiber to connect, but described adjustable demodulation multiplexer 331b and described the second optical switch 332b are integrated into the 2nd WXC, accordingly, described the 2nd WXC is connected with described receiver 333 optical fiber.

Adjustable multiplexer 221b and adjustable demodulation multiplexer 331b in the present embodiment can export any one wavelength at arbitrary port.

Particularly, described adjustable multiplexer 221b and adjustable demodulation multiplexer 331b include array waveguide grating AWG and optical cross connect OXC; Described AWG and described OXC are integrated in one, and wherein, AWG substitutes the input optical fibre array of OXC; OXC adopts two-dimension plane structure, and interior lights element adopts space optics to realize interconnected.

Or described adjustable multiplexer 221b and adjustable demodulation multiplexer 331b include AWG and optical cross connect OXC; Described AWG is connected with described OXC by optical fiber.

Or described adjustable multiplexer 221b and adjustable demodulation multiplexer 331b include grating, fourier lense and OXC; Described grating, fourier lense and OXC are integrated in one, and wherein, grating and fourier lense substitute the input optical fibre array of OXC; OXC adopts two-dimension plane structure, and interior lights element adopts space optics to realize interconnected.

Or, described adjustable multiplexer 221b and adjustable demodulation multiplexer 331b adopt the principle based on micro-ring resonator to realize, the operation principle of wherein said micro-ring resonator is by controlling the refractive index of micro-ring waveguide, can realize the resonance of different wave length, thereby realizes output different wave length.

Or described adjustable multiplexer 221b and adjustable demodulation multiplexer 331b adopt the correlation technique of similar large port WSS to realize.

In the present embodiment, no matter adjustable multiplexer/adjustable demodulation multiplexer and optical switch are to be connected or integrated by optical fiber, can realize 3 * 23 wavelength cross-connect WXC by the adjustable multiplexers of 31 * 23/adjustable demodulation multiplexer in conjunction with the optical switch of 23 1 * 3.

ROADM in the present embodiment possesses CDC characteristic, and ROADM possesses colorless characteristic, directionless characteristic and contentionless characteristic; Illustrate Wavelength dispatching and the CDC characteristic of ROADM in the present embodiment below.

Wavelength dispatching: the wavelength of supposition north orientation need to be dispatched to west to, particularly, the WSS in north orientation wavelength commutator module by the wavelength configuration of required scheduling to output port, described output port be north orientation with western to the output port being connected; Described wavelength is input to the WSS of west in to, configuration west to wavelength commutator module from north orientation, and described wavelength is exported to output port from west.

Colorless characteristic: the wavelength of supposition north orientation need to carry out this locality and download, particularly, WSS in north orientation wavelength commutator module arrives output port by the wavelength configuration of required scheduling, described output port is the output port that north orientation is connected with the WXC of 1 * 23 in local Drop (or ADD) module, described wavelength is input to the WXC of 1 * 23 in local Drop module, and 1 * 23 WXC can export described wavelength configuration to any one output port on it; In like manner, if in the time of required wavelength this locality need to being uploaded to north orientation, also can, by configuration, from any one output port of WXC, export north orientation to.

Directionless characteristic: supposition Add module is uploaded a wavelength, can be by any one input port input of 1 * 23 WXC, after configuration, can export the either direction in following direction to by any one output port of 1 * 23 WXC: east orientation, north orientation and western to; In like manner, suppose a wavelength of DROP module download, any one input port input that can be by 1 * 23 WXC from 3 directions (as east orientation, north orientation, west to) in the wavelength of any one direction, after configuration, can be by described wavelength by any one output port output of 1 * 23 WXC.

Contentionless characteristic: supposition north orientation and west are to there being an identical wavelength X to download in this locality, north orientation WSS is input to described wavelength X any one input port of 1 * 23 WXC, and west is input to described wavelength X to WSS another input port of 1 * 23 WXC; The configuration of WXC by 1 * 23, can receive the identical wavelength X from both direction respectively, and can not cause this locality to receive due to the identical wavelength from different directions at two RX, improved the flexibility of network, reduces network Wavelength conflict.

In the present embodiment, by the adjustable multiplexers of 31 * 23/adjustable demodulation multiplexer, in conjunction with the optical switch of 23 1 * 3, realize 3 * 23 WXC; If 4 dimension ROADM, 4 * 23 WXC just can adopt the adjustable multiplexer/adjustable demodulation multiplexer of 41 * 23 to realize in conjunction with the optical switch of 23 1 * 4, thereby meets the demand of 4 dimension ROADM; If 8 dimension ROADM, 8 * 23 WXC just can adopt the adjustable multiplexer/adjustable demodulation multiplexer of 81 * 23 to realize in conjunction with the optical switch of 23 1 * 8, thereby meets the demand of 8 dimension ROADM.The embodiment of the present invention can realize by increasing the number of adjustable multiplexer/adjustable demodulation multiplexer the expansion of dimension, thereby the dimension scalability of ROADM is improved.

Realizing of adjustable multiplexer/adjustable demodulation multiplexer in the present embodiment is fairly simple, and its cost WSS cost of the prior art of comparing is low, has reduced accordingly the cost of ADD module and DROP module, thereby has made the cost of the ROADM in the present embodiment.On the other hand, also improved the integrated level of module, integrated level has significantly and improves compared with prior art.

Embodiment 4

With reference to figure 4, Fig. 4 is the structural representation of a kind of reconfigurable optical add/drop multiplexer ROADM embodiment that provides of the embodiment of the present invention 4.

Described line side wavelength Switching Module 11 comprises 2M WSS, and every two WSS form the wavelength commutator module of a direction, and 2M WSS forms respectively the wavelength commutator module of M direction.The wavelength commutator module of each direction and the wavelength commutator module class in embodiment 2 seemingly, specifically can, with reference to associated description in embodiment 2, not repeat them here.

Described upper mode piece 22 comprises the first optical switch 222a and N the transmitter 223 of adjustable multiplexer 221a, N 1 * M of M 1 * N, the adjustable multiplexer 221a of described 1 * N is connected with the first optical switch 222a of described 1 * M, and the first optical switch 222a of described 1 * M is connected with described transmitter 223 by optical fiber; Wherein said the first optical switch 222a comprises the first input optical fibre array 2201a, the first collimation unit 2202a, the first crosspoint 2203a; Described adjustable multiplexer 221a comprises the second crosspoint 2204a, the second collimation unit 2205a, multiplexer 2206a and the first output optical fibre array 2207a.

The annexation of the adjustable multiplexer 221a of described 1 * N and the first optical switch 222a of described 1 * M can for following any:

(1) described adjustable multiplexer 221a is connected with described the first optical switch 222a by optical fiber;

(2) described adjustable multiplexer 221a and described the first optical switch 222a are integrated into a WXC (Wavelength Cross Connection, wavelength cross-connect);

Accordingly, a described WXC is connected with described transmitter 223 optical fiber.

The fiber optic wavelength that described the first input optical fibre array 2201a sends for receiving transmitter 223, exports described fiber optic wavelength to the first collimation unit 2202a.

In practical application, transmitter 223 sends fiber optic wavelength to the first input optical fibre array 2201a by optical fiber, and described the first input optical fibre array 2201a is positioned at the input port place of described the first optical switch 222a.

Described the first collimation unit 2202a is used for receiving described fiber optic wavelength, exports described fiber optic wavelength collimation to described first order crosspoint 2203a.

In practical application, described the first collimation unit 2202a is collimator array.

Described the first crosspoint 2203a, for according to control command, regulates the micro-reflector that described fiber optic wavelength is corresponding, exports described fiber optic wavelength to described the second crosspoint 2204a.

In practical application, the content of described control command is the object output port that fiber optic wavelength is corresponding, the first crosspoint receives after described fiber optic wavelength, according to control command, regulate the micro-reflector that described fiber optic wavelength is corresponding, from described object output port, export described fiber optic wavelength to described the second crosspoint 2204a.

Described the second crosspoint 2204a is used for regulating light beam reflection angle, exports described fiber optic wavelength to described the second collimation unit 2205a.

When described the first crosspoint 2203a is input MEMS array, described the second crosspoint 2204a is output MEMS array or output Lcos (Liquid Crystal on Silicon, liquid crystal on silicon) array; Or when described the first crosspoint 2203a is input Lcos array, described the second crosspoint 2204a can be output Lcos array, can be also output MEMS array.

Described output MEMS array or output Lcos array can be two-dimensional array.

Wherein, the corresponding MEMS picture point of each fiber optic wavelength (hot spot) or Lcos picture point; The MEMS picture point number of described input MEMS array depends on wavelength number in input optical fibre number and every optical fiber, and MEMS picture point number equals input optical fibre number and is multiplied by wavelength number in every optical fiber; The MEMS picture point number of described output MEMS array depends on the wavelength number of wish output.

Described the second collimation unit 2205a is for exporting described fiber optic wavelength collimation to described multiplexer 2206a.

In practical application, described the second collimation unit 2205a can be fourier lense, can be also microlens array.

Described multiplexer 2206a is multiplexing for described fiber optic wavelength is carried out, and generates and export wdm optical signal to described the first output optical fibre array 2207a.

Wherein, described multiplexer 2206a can be grating; For example, or described multiplexer 2206a is planar optical waveguide device, AWG; Or described multiplexer 2206a is micro-ring array.

Described the first output optical fibre array 2207a is used for exporting described wdm optical signal to described line side wavelength Switching Module 11.

In practical application, described wdm optical signal is transmitted through the fiber to described line side wavelength Switching Module 11; Described the first output optical fibre array 2207a is positioned at the output port side of described adjustable multiplexer 221a.

If described adjustable multiplexer 221a and described the first optical switch 222a are integrated into a WXC, corresponding, described the first input optical fibre array 2201a is positioned at the input port side of a described WXC; Described the first output optical fibre array 2207a is positioned at the output port side of a described WXC.

In described ADD module, when described collimator array is one-dimensional array, described input MEMS array is one-dimensional array; Described output MEMS array can be one-dimensional array, can be also two-dimensional array; Preferably, described output MEMS array is two-dimensional array.

Or preferred, when described collimator array is two-dimensional array, corresponding, described input MEMS array and output MEMS array are two-dimensional array;

Or when described collimator array is two-dimensional array, corresponding, described input MEMS array is two-dimensional array; Described output MEMS array is two-dimensional array, and corresponding, described microlens array is two-dimensional array.

Described DROP module 33, comprise the adjustable demodulation multiplexer 331a of M 1 * N and the second optical switch 332a and N the receiver 333 of N 1 * M, the adjustable multiplexer 331a of described 1 * N is connected with the second optical switch 332a of described 1 * M, and the second optical switch 332a of described 1 * M is connected with described transmitter 333 by optical fiber; Wherein said adjustable demodulation multiplexer 331a comprises the second input optical fibre array 3301a, demodulation multiplexer 3302a, the 3rd collimation unit 3303a, the 3rd crosspoint 3304a; Described the second optical switch 332a comprises the 4th crosspoint 3305a, the 4th collimation unit 3306a and the second output optical fibre array 3307a.

The annexation of the adjustable demodulation multiplexer 331a of described 1 * N and the second optical switch 332a of described 1 * M can for following any:

(1) described adjustable demodulation multiplexer 331a is connected with described the second optical switch 332a by optical fiber;

(2) described adjustable demodulation multiplexer 331a and described the second optical switch 332a are integrated into the 2nd WXC;

Accordingly, described the 2nd WXC is connected with described receiver 333 optical fiber.

The wdm optical signal that described the second input optical fibre array 3301a sends for receiving described line side wavelength Switching Module 11, exports described wdm optical signal to demodulation multiplexer 3302a.

In practical application, described line side wavelength Switching Module 11 passes through Optical Fiber Transmission wdm optical signal to described the second input optical fibre array 3301a; Described the second input optical fibre array 3301a is positioned at the input port side of described adjustable demodulation multiplexer 331a.

Described demodulation multiplexer 3302a is used for receiving described wdm optical signal, and described wdm optical signal is carried out to demultiplexing, and the fiber optic wavelength after described demultiplexing is projected to described the 3rd collimation unit 3303a.

Wherein, described demodulation multiplexer 3302a can be grating; For example, or described demodulation multiplexer 3302a is planar optical waveguide device, AWG; Or described demodulation multiplexer 3302a is micro-ring array.

Described the 3rd collimation unit 3303a is for being collimated to described the 3rd crosspoint 3304a by the fiber optic wavelength after described demultiplexing.

In practical application, described the 3rd collimation unit 3303a can be fourier lense, can be also microlens array.

Described the 3rd crosspoint 3304a, for according to control command, regulates the micro-reflector that described fiber optic wavelength is corresponding, exports described fiber optic wavelength to described the 4th crosspoint 3305a.

In practical application, the content of described control command is the object output port that fiber optic wavelength is corresponding, the 3rd crosspoint 3304a receives after described fiber optic wavelength, according to control command, regulate the micro-reflector that described fiber optic wavelength is corresponding, from described object output port, export described fiber optic wavelength to described the 4th crosspoint 3305a.

Described the 4th crosspoint 3305a is used for regulating light beam reflection angle, exports described fiber optic wavelength to described the 4th collimation unit 3306a.

When described the 3rd crosspoint 3304a is input MEMS array, described the 4th crosspoint 3305a is output MEMS array or output Lcos array; Or when described the 3rd crosspoint 3304a is input Lcos array, described the 4th crosspoint 3305a can be output Lcos array, can be also output MEMS array.

Described output MEMS array or output Lcos array can be two-dimensional array.

Wherein, the corresponding MEMS picture point of each fiber optic wavelength (hot spot) or Lcos picture point; The MEMS picture point number of described input MEMS array depends on wavelength number in input optical fibre number and every optical fiber, and MEMS picture point number equals input optical fibre number and is multiplied by wavelength number in every optical fiber, for example: 4 dimension * 80 ripples/dimensions; The MEMS picture point number of described output MEMS array depends on the wavelength number of wish output, for example: 4 road input optical fibres, 10 ripples are on average exported on every road, i.e. the maximum output of whole WXC 40 ripples, the MEMS picture point number of exporting MEMS array is 40.

Described the 4th collimation unit 3306a is for exporting described fiber optic wavelength coupling to described the second output optical fibre array 3307a.

In practical application, described the 4th collimation unit is collimator array.

Described the second output optical fibre array 3307a is used for exporting described fiber optic wavelength to receiver 333.

Wherein, described wavelength of light exports receiver 333 to by optical fiber; Described the second output optical fibre array 3307a is positioned at the output port side of described the second optical switch 332a.

If described adjustable demodulation multiplexer 331a and described the second optical switch 332a are integrated into the 2nd WXC, corresponding, described the second input optical fibre array 3301a is positioned at the input port side of described the 2nd WXC; Described the second output optical fibre array 3307a is positioned at the output port side of described the 2nd WXC.

In described DROP module, when described input MEMS array is one-dimensional array with output MEMS array, corresponding, described collimator array is one-dimensional array;

Or preferred, when described input MEMS array is two-dimensional array with output MEMS array, corresponding, described collimator array is two-dimensional array;

Or when described microlens array is one-dimensional array, corresponding, described input MEMS array is one-dimensional array; Described output MEMS array is two-dimensional array, and corresponding, described collimator array is two-dimensional array.

Due to the invertibity of light path, the WXC in the present embodiment in ADD module and the 2nd WXC in DROP module can realize with same equipment, and the part of the part of the WXC in ADD module and the 2nd WXC in DROP module is consistent; Particularly, can be by the WXC in ADD module conversely with just realizing the function of the 2nd WXC in DROP module, be about to the input of the WXC in ADD module as output, using the output of the WXC in ADD module as input, just can realize the function of the 2nd WXC in DROP module.

According to foregoing description, described the first input optical fibre array 2201a and described the second output optical fibre array 3307a can realize by same module; Described the first collimation unit 2202a and described the 4th collimation unit 3306a can realize by same module; Described the first crosspoint 2203a and described the 4th crosspoint 3305a can realize by same module; Described the second crosspoint 2204a and described the 3rd crosspoint 3304a can realize by same module; Described the second collimation unit 2205a and described the 3rd collimation unit 3303a can realize by same module; Described multiplexer 2206a and described demodulation multiplexer 3302a can realize by same module; Described the first output optical fibre array 2207a and described the second input optical fibre array 3301a can realize by same module.

In the present embodiment, further, for described ADD module, can also between input MEMS array and output MEMS array, increase by the first fourier lense, described the first fourier lense carries out shaping for the light beam that wavelength of light is formed.Accordingly, for described DROP module, can between input MEMS array and output MEMS array, increase by the second fourier lense, the function class of the function of described the second fourier lense and described the first fourier lense seemingly, does not repeat them here yet.

ROADM in the present embodiment possesses CDC characteristic, and ROADM possesses colorless characteristic, directionless characteristic and contentionless characteristic.Because WXC possesses colorless characteristic, so downloading the wavelength of (or ADD module is uploaded), DROP module there is colorless characteristic; Because WXC can download the wavelength from any one direction in M direction, or WXC can export any one direction in M direction to by uploading wavelength, needs the wavelength of downloading (or uploading) to have directionless characteristic; If have identical wavelength need to download in this locality (or uploading) in the 1st and M direction, can allocate by the control of optical switch, two identical wavelength are downloaded respectively to (or uploading) to different RX (or TX), i.e. contentionless characteristic.

In the present embodiment, the upper mode piece of ROADM and the WXC in lower mode piece adopt integrated mode to realize, relatively simple for structure, its cost WSS cost of the prior art of comparing is low, reduce accordingly the cost of upper ripple ADD module and lower ripple DROP module, thereby made the cost of the ROADM in the present embodiment.

Embodiment 5

With reference to figure 5, Fig. 5 is the structural representation of a kind of wavelength cross-connect WXC embodiment of providing of the embodiment of the present invention 5.

Described WXC comprises:

The first input optical fibre array 2201, the first collimation unit 2202, the first crosspoint 2203, the second crosspoint 2204, the second collimation unit 2205, multiplexer 2206 and the first output optical fibre array 2207;

Described the first input optical fibre array 2201, the first collimation unit 2202, the first crosspoint 2203, the second crosspoint 2204, the second collimation unit 2205, multiplexer 2206 and the first output optical fibre array 2207 are integrated in described WXC;

Described the first input optical fibre array 2201, for receiving fiber optic wavelength, is exported described wdm optical signal to the first collimation unit 2202;

Described the first collimation unit 2202, for receiving described fiber optic wavelength, exports described fiber optic wavelength collimation to described first order crosspoint 2203;

Described the first crosspoint 2203, for according to control command, regulates the micro-reflector that described fiber optic wavelength is corresponding, exports described fiber optic wavelength to described the second crosspoint 2204;

Described the second crosspoint 2204, for regulating light beam reflection angle, exports described fiber optic wavelength to described the second collimation unit 2205;

Described the second collimation unit 2205 is for exporting described fiber optic wavelength collimation to described multiplexer 2206;

Described multiplexer 2206 is multiplexing for described fiber optic wavelength is carried out, and generates and export wavelength division multiplexing wdm optical signal to described the first output optical fibre array 2207;

Described the first output optical fibre array 2207 is for exporting described wdm optical signal.

Further, described multiplexer is grating or array waveguide grating AWG or micro-ring array.

Further, described the second collimation unit is fourier lense or microlens array; Accordingly, described the first collimation unit is collimator array.

Further, described the first crosspoint is for input MEMS array, corresponding, and described the second crosspoint is output MEMS array or output Lcos array; Or described the first crosspoint is for input liquid crystal on silicon Lcos array, corresponding, described the second crosspoint is output Lcos array or output MEMS array.

Further, described output MEMS array or output Lcos array are two-dimensional array.

WXC in the present embodiment adopts integrated mode to realize, relatively simple for structure, and its cost WSS cost of the prior art of comparing is low, can reduce accordingly the cost of upper ripple ADD module and lower ripple DROP module, thereby make the cost of ROADM.

Embodiment 6

With reference to figure 6, Fig. 6 is the structural representation of a kind of wavelength cross-connect WXC embodiment of providing of the embodiment of the present invention 6.

Described WXC comprises:

The second input optical fibre array 3301, demodulation multiplexer 3302, the 3rd collimation unit 3303, the 3rd crosspoint 3304, the 4th crosspoint 3305, the 4th collimation unit 3306 and the second output optical fibre array 3307;

Described the second input optical fibre array 3301, demodulation multiplexer 3302, the 3rd collimation unit 3303, the 3rd crosspoint 3304, the 4th crosspoint 3305, the 4th collimation unit 3306 and the second output optical fibre array 3307 are integrated in described WXC;

Described the second input optical fibre array 3301, for receiving wdm optical signal, is exported described wdm optical signal to demodulation multiplexer 3302;

Described demodulation multiplexer 3302, for receiving described wdm optical signal, carries out demultiplexing to described wdm optical signal, and the fiber optic wavelength after described demultiplexing is projected to described the 3rd collimation unit 3303;

Described the 3rd collimation unit 3303 is for being collimated to the fiber optic wavelength after described demultiplexing described the 3rd crosspoint 3304;

Described the 3rd crosspoint 3304, for according to control command, regulates the micro-reflector that described fiber optic wavelength is corresponding, exports described fiber optic wavelength to described the 4th crosspoint 3305;

Described the 4th crosspoint 3305, for regulating light beam reflection angle, exports described fiber optic wavelength to described the 4th collimation unit 3306;

Described the 4th collimation unit 3306 is for exporting described fiber optic wavelength coupling to described the second output optical fibre array 3307;

Described the second output optical fibre array 3307 is for exporting described fiber optic wavelength.

Further, described demodulation multiplexer is grating or array waveguide grating AWG or micro-ring array.

Further, described the 3rd collimation unit is fourier lense or microlens array; Accordingly, described the 4th collimation unit is collimator array.

Embodiment 7

With reference to figure 7, Fig. 7 is the first structural representation of a kind of wavelength cross-connect WXC embodiment of providing of the embodiment of the present invention 7.

Described WXC comprises:

Input optical fibre array 701 (not shown)s, grating 702, fourier lense 703, input MEMS array 704, output MEMS array 705, collimator array 706 and output optical fibre array 707 (not shown)s; Described input optical fibre array 701, grating 702, fourier lense 703, input MEMS array 704, output MEMS array 705, collimator array 706 and output optical fibre array 707 are integrated in described WXC.

Described input optical fibre array 701 is for receiving wdm optical signal.

Described grating 702, for receiving the wdm optical signal of described input optical fibre array 701 transmission, carries out demultiplexing to described wdm optical signal, and the fiber optic wavelength after described demultiplexing is projected to described fourier lense 703.

Described fourier lense 703 is for being collimated to the fiber optic wavelength after described demultiplexing described input MEMS array 704.

Described input MEMS array 704, for according to control command, regulates the MEMS micro-reflector that described fiber optic wavelength is corresponding, exports described fiber optic wavelength to described output MEMS array 705 from object output port.

Described output MEMS array 705, for regulating light beam reflection angle, exports described fiber optic wavelength to described collimator array 706.

Described collimator array 706 is for exporting described fiber optic wavelength coupling to described output optical fibre array 707.

Described output optical fibre array 707 is for exporting described fiber optic wavelength.

Grating 702 in the present embodiment can replace with AWG 708, accordingly, described fourier lense 703 use microlens arrays 709 replace, and as shown in Figure 8, Fig. 8 is the second structural representation of a kind of wavelength cross-connect WXC embodiment of providing of the embodiment of the present invention 7.

The function class of the function of described AWG 708 and described grating 702 seemingly, specifically can, with reference to associated description in embodiment 7, not repeat them here.The function class of the function of described microlens array 709 and described fourier lense 703 seemingly, specifically can, with reference to associated description in embodiment 7, not repeat them here.

Or described grating 702 also can replace with micro-ring array, the function class of the function of described micro-ring array and described grating 702 seemingly, specifically can, with reference to associated description in embodiment 7, not repeat them here.

Described in the present embodiment, inputting MEMS array 704 also can replace with input Lcos array.

WXC in the present embodiment can be for realizing the corresponding function of WXC in DROP module; Due to the invertibity of light path, also can be using the output of the WXC in the present embodiment as input, corresponding, input is brought in the corresponding function of realizing the WXC in ADD module as output, specifically can be with reference to the associated description of embodiment 4.

WXC in the present embodiment also can, for realizing its function in other device, be not limited to and be applied in ROADM.

It should be noted that, each embodiment in this specification all adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.

It should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.

One of ordinary skill in the art will appreciate that all or part of step that realizes above-described embodiment can complete by hardware, also can come the hardware that instruction is relevant to complete by program, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.

The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims

1. a reconfigurable optical add/drop multiplexer ROADM, is characterized in that, comprising: line side wavelength Switching Module, upper mode piece and lower mode piece, and described line side wavelength Switching Module is connected with described lower mode piece with described upper mode piece respectively by optical fiber;

2. ROADM according to claim 1, is characterized in that, described adjustable multiplexer and described the first optical switch are integrated into the first wavelength cross-connect WXC, and corresponding, a described WXC is connected by optical fiber with described transmitter; Described adjustable demodulation multiplexer and described the second optical switch are integrated into the 2nd WXC, and corresponding, described the 2nd WXC is connected by optical fiber with described receiver.

3. ROADM according to claim 1, is characterized in that, described adjustable multiplexer is connected with described the first optical switch by optical fiber, and described adjustable demodulation multiplexer is connected with described the second optical switch by optical fiber.

4. according to the ROADM described in claim 1-3 any one, it is characterized in that, described adjustable multiplexer and adjustable demodulation multiplexer include array waveguide grating AWG and optical cross connect OXC, and described AWG and described OXC are integrated in one, or described AWG is connected with described OXC by optical fiber;

Or,

Described adjustable multiplexer and adjustable demodulation multiplexer include grating, fourier lense and OXC, and described grating, fourier lense and OXC are integrated in one.

5. ROADM according to claim 1, is characterized in that, described the first crosspoint is for input MEMS array, corresponding, and described the second crosspoint is output MEMS array or output liquid crystal on silicon Lcos array; Described the 3rd crosspoint is for input MEMS array, corresponding, and described the 4th crosspoint is output MEMS array or output Lcos array.

6. ROADM according to claim 5, is characterized in that, described output MEMS array or output Lcos array are two-dimensional array.

7. ROADM according to claim 1, is characterized in that, described multiplexer and demodulation multiplexer are grating;

Or described multiplexer and demodulation multiplexer are planar optical waveguide device;

Or described multiplexer and demodulation multiplexer are micro-ring array.

8. ROADM according to claim 7, is characterized in that, described planar optical waveguide device is AWG.

9. ROADM according to claim 1, is characterized in that, described the second collimation unit and described the 3rd collimation unit are fourier lense; Or described the second collimation unit and described the 3rd collimation unit are microlens array.

10. ROADM according to claim 1, is characterized in that, described the first collimation unit and described the 4th collimation unit are collimator array.

11. according to the ROADM described in claim 1-3 any one or 5-10 any one, it is characterized in that, described the first crosspoint is for input Lcos array, corresponding, and described the second crosspoint is output Lcos array or output MEMS array; Described the 3rd crosspoint is for input Lcos array, corresponding, and described the 4th crosspoint is output Lcos array or output MEMS array.

12. 1 kinds of wavelength cross-connect WXC, is characterized in that, comprising:

13. WXC according to claim 12, is characterized in that, described multiplexer is grating or array waveguide grating AWG or micro-ring array.

14. according to the WXC described in claim 12 or 13, it is characterized in that, described the second collimation unit is fourier lense or microlens array; Accordingly, described the first collimation unit is collimator array.

15. WXC according to claim 14, is characterized in that, described the first crosspoint is for input MEMS array, corresponding, and described the second crosspoint is output MEMS array or output liquid crystal on silicon Lcos array;

Or,

Described the first crosspoint is for input Lcos array, corresponding, and described the second crosspoint is output Lcos array or output MEMS array.

16. WXC according to claim 15, is characterized in that, described output MEMS array or output Lcos array are two-dimensional array.

17. 1 kinds of wavelength cross-connect WXC, is characterized in that, comprising:

18. WXC according to claim 17, is characterized in that, described demodulation multiplexer is grating or array waveguide grating AWG or micro-ring array.

19. according to the WXC described in claim 17 or 18, it is characterized in that, described the 3rd collimation unit is fourier lense or microlens array; Accordingly, described the 4th collimation unit is collimator array.

20. WXC according to claim 19, is characterized in that, described the 3rd crosspoint is for input MEMS array, corresponding, and described the 4th crosspoint is output MEMS array or output liquid crystal on silicon Lcos array;

Or,

Described the 3rd crosspoint is for input Lcos array, corresponding, and described the 4th crosspoint is output Lcos array or output MEMS array.

21. WXC according to claim 20, is characterized in that, described output MEMS array or output MEMS array are two-dimensional array.