CN101420286B - Configurable OADM apparatus for realizing flexible wavelength scheduling - Google Patents
Configurable OADM apparatus for realizing flexible wavelength scheduling Download PDFInfo
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Abstract
The present invention discloses an ROADM device for realizing flexible wavelength dispatching. The device comprises couplers or WSS with 1 to k line directions for dividing optical signals into n parts and outputting the signals to m down-line units and WSS or couplers with 1 to k line directions; the down-line units for selecting, de-multiplexing and receiving the optical signals from the 1 to k line directions; up-line units for generating optical signals with different wavelengths, multiplexing the optical signals, selecting the multiplexed optical signals, and outputting the selected optical signals to the WSS or couplers with 1 to k line directions; WSS or couplers with 1 to k directions for selecting optical signals which are input into the WSS or couplers, combining the selected optical signals and outputting the combined optical signals.
Description
Technical field
The present invention relates to optical communication field, relate more specifically to a kind of configurable OADM apparatus of realizing flexible wavelength scheduling.
Background technology
At present, dense wave division multipurpose (Dense Wavelength Division Multiplexing is called for short DWDM) equipment has been widely used in backbone network in this locality and metro core network.DWDM equipment network topology also from simple point-to-pointly carry out the transition to looped network, two rings intersect, and are applied to lattice shape net and mesh network the most at last.It is main data service that type of service is carried out the transition to IP by the circuit-switched service that with time division multiplexing (Time-Division Multiplexing is called for short TDM) business is the master.Because business development uncertain and estimate the increase of difficulty early stage; Intellectuality to equipment has proposed requirement; Hope can realize that professional scheduling feature is to adapt to the variation of networking and service distribution by fast and flexible when network topology and service distribution change.
With SDH (Synchronous Digital Hierarchy; Being called for short SDH) the equipment realization is to the VC-4 exchange and dispatch similar; The intelligent requirements DWDM equipment of network provides the configurable functionality based on wavelength; Be the configurable OADM function of wavelength (Reconfigurable Optical Add/Drop Multiplexing is called for short ROADM), realize the add drop multiplex function of wavelength flexibly and can carry out Remote configuration.ROADM can need not realize the connection of arbitrfary point to the arbitrfary point under the situation of artificial allotment, also can realize the road up and down and the straight-through configuration of single wavelength.Utilize the ROADM technology; Can increase wavelength division multiplexing (Wavelength Division Multiplexing; Be called for short WDM) elasticity of network, make the path that operator can Remote Dynamic control wave longer transmission, thereby can reduce the operation and the maintenance cost of operator effectively.Simultaneously, along with the development of network size and the diversity of type of service, that requirement can provide is multi-direction, can realize the intelligent ROADM system of service broadcast function.
The realization of ROADM function has multiple technologies, comprises Micro Electro Mechanical System (Micro Elero-Mechanical system, abbreviation MEMS) conventional art and the present realization technology based on novel optical device based on array of photoswitch.Wherein, novel optical device mainly contains wavelength blocker spare (WB) and wavelength-selective switches device (WSS).
In No. 200610030504.3, the patent application of by name " realizing configurable OADM apparatus single, polydirectional wavelength scheduling ", provided and adopted array of photoswitch to realize the theory diagram of multi-direction ROADM function.As shown in Figure 1, realize about wavelength configurable through adopting the Demux/Switch/Mux technology.The number of wavelengths of supposing each direction is 40; The ROADM node of 4 directions needs 40 8 * 8 optical switches to realize configurable multi-direction the Wavelength dispatching function of co-wavelength that reach up and down; Need 2 160 * 160 optical switches to realize port assignment function, such optical switch scale can't realize at present.In addition, owing to optical switch can't smoothly be expanded, cost is expensive and reason such as less reliable, the scheme of optical switch can't realize commercialization at present.
In No. 200610030504.3, the patent application of by name " realizing configurable OADM apparatus single, polydirectional wavelength scheduling ", give the block diagram that adopts the optical wavelength block device to realize the ROADM function.As shown in Figure 2, the mode that following road adopts broadcasting to choose through coupler and tunable optic filter realizes road and port assignment under the selection of wavelength, blocks the function of setting out on a journey of realization wavelength at straightthrough port through the wavelength that wavelength blocker spare is set out on a journey to needs this locality.Simple in structure flexible, can realize folk prescription road and broadcast capability under the selection of business, but this scheme can only realize unidirectional wavelength block function, can't realize the Wavelength dispatching function of a plurality of directions.
Because light shutter device and WB device are realized the drawback of ROADM function, the general at present WSS of employing device is realized the ROADM function.No. 200610030504.3, the patent application of by name " realizing configurable OADM apparatus single, polydirectional wavelength scheduling " give a kind of method that adopts the WSS device to realize the ROADM function.As shown in Figure 3, all directions utilize coupler that input signal is merotomized, and are sent to respectively that all directions are set out on a journey and this underground road, and this locality signal of setting out on a journey selects wavelength signals to export with all directions signal by wavelength selection unit.The underground road of the basis of this method implementation is: this underground road signal of all directions is selected road signal down through wavelength selection unit, and after distributing to the tunable filtering unit filtering, is received by receiving element (RX).This locality of this method implementation of setting out on a journey is: tunable transmitter (TX) is closed the ripple unit and closed ripple through setting out on a journey after, again through the allocation units of setting out on a journey, distribute to all directions.
Fig. 4 realizes the detailed diagram of multi-direction ROADM for Fig. 3.Visible by Fig. 4; The device that provides in No. 200610030504.3, the patent application of by name " realizing configurable OADM apparatus single, polydirectional wavelength scheduling " can be realized multidirectional wavelength road configuration and scheduling feature up and down, supports broadcast capability, the wavelength loop fuction of wavelength bearer service, the route protection function of wavelength.But this method is owing to there being 1 following road wavelength to select and allocation units, so different directions can not descend the light signal of the identical wavelength in road; And this method only has one to set out on a journey to close and involve allocation units, so the light signal of identical wavelength can not be set out on a journey from node.Because this shortcoming, make this method can not be practical in real network.
Summary of the invention
One or more problems in view of the above the invention provides a kind of configurable OADM apparatus of new realization flexible wavelength scheduling.
Configurable OADM apparatus according to realization flexible wavelength scheduling of the present invention comprises: the line direction coupler or the wavelength selection unit of first direction to the k direction; (the individual part of n＞k) exports the line direction wavelength selection unit or the coupler of m Xia Lu unit and first direction to the k direction respectively to be used for that light signal is divided into n; The Xia Lu unit, be used for to the light signal from the line direction of said first direction to the k direction select, demultiplexing and receiving; The unit of setting out on a journey; Be used to generate the light signal of various wavelength; Light signal to said various wavelength carries out multiplexing; Light signal to the multiplexing various wavelength of process is selected, and exports selected light signal the line direction wavelength selection unit or the coupler of said first direction to the k direction to respectively; The line direction wavelength selection unit or the coupler of first direction to the k direction are used for the light signal of importing it is selected, and export after selected light signal is closed ripple.
Wherein, the Xia Lu unit comprises: wavelength selection unit or coupler are used for ripple is selected and closed to the light signal of exporting from the following road of said first direction to the k direction; Demultiplexing unit is used for select and close the light signal demultiplexing behind the ripple from wavelength selection unit or coupler; Receiving element is used for the single wave optical signal from demultiplexing unit output is received.
Wherein, the unit of setting out on a journey comprises: the transmitter of setting out on a journey is used to generate the light signal of various wavelength; Multiplexing Unit is used for the light signal of the transmitter output of setting out on a journey is closed ripple; The wavelength selection unit of setting out on a journey or coupler are used for the light signal of importing it is selected, and export selected light signal to respective direction line direction wavelength selection unit or coupler.
Wherein, the line direction coupler or the wavelength selection unit of the input and output of first direction to the k direction can be one of following combination: be input as coupler, be output as wavelength selection unit; Be input as wavelength selection unit, be output as wavelength selection unit, be input as wavelength selection unit, be output as coupler.
Wherein, wavelength selection unit or coupler that the wavelength selection unit of each line direction or coupler all go out a following road port and Xia Lu unit at least link to each other, and with this a plurality of light signals of road direction are down combined.
Wherein, the wavelength selection unit of each line direction or coupler all have at least a wavelength selection unit or a coupler of going up the road port and the unit of setting out on a journey to link to each other, and are sent to a plurality of line directions with this signal of will setting out on a journey.
Wherein, the Xia Lu unit and the unit of setting out on a journey can have a plurality of, and wavelength selection unit or coupler on each Xia Lu unit and set out on a journey unit and the circuit couple together, with road about the wavelength of supporting more orientation independent property.
Wherein, but the setting out on a journey and wavelength selection unit or coupler that following road port cascade the is new of wavelength selection unit of line direction or coupler, to save the port number of line direction.
Wherein, k is the integer more than or equal to 2, and n is the integer greater than 2, and m is the integer more than or equal to 0.
Wherein, the demultiplexing unit of Xia Lu unit can be wavelength selection unit, accomplishes road under the Wavelength-independent property; The demultiplexing unit of Xia Lu unit also can be the demultiplexing device of wavelength sensitive type, accomplishes road under the fixed wave length.
Wherein, the transmitter of the unit of setting out on a journey can be the tunable wave length transmitter, and Multiplexing Unit can be the insensitive coupling type of wavelength wave multiplexer spare, accomplishes Wavelength-independent property and sets out on a journey; The transmitter of unit of setting out on a journey can be the wavelength stationary transmitter, and Multiplexing Unit can be wavelength sensitive type wave multiplexer spare, accomplishes fixed wave length and sets out on a journey.
The present invention has overcome existing ROADM can not be from the light signal of the identical wavelength in road under all directions, can not the set out on a journey shortcoming of light signal of a plurality of identical wavelength of node.The present invention has realized can the set out on a journey light signal of a plurality of identical wavelength of node, and different directions can descend the identical wavelength in road, and all are road port ROADM device of the polydirectional wavelength scheduling flexibly of the practicality of the wavelength signals of any direction up and down all up and down.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the block diagram that the array of photoswitch technical scheme realizes multi-direction ROADM node;
Fig. 2 is that wavelength interrupter technique scheme realizes the block diagram of folk prescription to the ROADM node;
Fig. 3 is that optical wavelength selects technical scheme to realize the block diagram of ROADM node;
Fig. 4 is that optical wavelength selects technical scheme to realize the block diagram of multi-direction ROADM node;
Fig. 5 is the block diagram according to the ROADM device of the realization flexible wavelength scheduling of the embodiment of the invention;
Fig. 6 is the block diagram according to the ROADM device of realization eight light directions of the embodiment of the invention;
Fig. 7 is the block diagram () according to the ROADM device of realization four light directions of the embodiment of the invention;
Fig. 8 is the realization block diagram () according to the Xia Lu unit of the ROADM device of realization four light directions of the embodiment of the invention;
Fig. 9 is the realization block diagram () according to the unit of setting out on a journey of the ROADM device of realization four light directions of the embodiment of the invention;
Figure 10 is the block diagram (two) according to the ROADM device of realization four light directions of the embodiment of the invention;
Figure 11 is the realization block diagram (two) according to the Xia Lu unit of the ROADM device of realization four light directions of the embodiment of the invention;
Figure 12 is the realization block diagram (two) according to the unit of setting out on a journey of the ROADM device of realization four light directions of the embodiment of the invention;
Figure 13 is the block diagram (three) according to the ROADM device of realization four light directions of the embodiment of the invention;
Figure 14 is the realization block diagram (three) according to the Xia Lu unit of the ROADM device of realization four light directions of the embodiment of the invention;
Figure 15 is the realization block diagram (three) according to the unit of setting out on a journey of the ROADM device of realization four light directions of the embodiment of the invention.
Embodiment
With reference to accompanying drawing, specify embodiment of the present invention below.
Fig. 1 is the block diagram that the array of photoswitch technical scheme realizes multi-direction ROADM node.This scheme is by wavelength demultiplexer (DMUX), with ripple scheduling array of photoswitch, wavelength multiplexer (MUX), fixed laser array (Fixed laser array), tunable laser array (Tunable laser array), the assignment optical switch of setting out on a journey, assignment optical switch in road is formed down.
In Fig. 1, the optical signals DMUX that imports from each line direction separates each wavelength, and the light signal of each wavelength gets into ripple scheduling array of photoswitch.The signal of setting out on a journey from this node inserts through the tunable laser array, goes up the road port assignment through the assignment optical switch of setting out on a journey, and carries out the variation of light signal again through the fixed laser array, exports to ripple scheduling array of photoswitch.With ripple scheduling array of photoswitch the wavelength signals of all directions input, the wavelength signals that this node is set out on a journey are dispatched to certain direction output or road under this node.The MUX and other wavelength signals that are dispatched to the signal entering respective direction of certain direction are closed ripple output.The wavelength signals that is dispatched to road under this node gets into down, and assignment optical switch in road descends the road port assignment.The required optical switch of this scheme is larger, can't realize at present.In addition, owing to optical switch can't smoothly be expanded, cost is expensive and reason such as less reliable, present this scheme can't realize commercialization.
Fig. 2 is that wavelength interrupter technique scheme realizes the block diagram of folk prescription to the ROADM node.This scheme by coupling type channel-splitting filter 1 minute 2, wavelength blocker spare (WB), coupling type wave multiplexer 2 close 1, coupling type channel-splitting filter 1 minute 2 or 1 minutes 4 (upgrading with), coupling type channel-splitting filter 1 minute 8 or 1 minutes 16 etc. (following road with), coupling type wave multiplexer 2 close and 1 or 4 close 1 (upgrade with), the type wave multiplexer 8 that is coupled and close 1 or 16 and close (usefulness of setting out on a journey), tunable laser array, tunable filter array (Tunable filter array) such as 1 and form.
In Fig. 2, by 1 minute 2 device separated into two parts of optical signals coupling type channel-splitting filter of circuit input, a part is to WB, and a part is given coupling type channel-splitting filter 1 minute 2 or 1 minutes 4 (upgrading is used).Input to the light signal of 1 minute 2 or 1 minutes 4 (upgrading is used) devices of coupling type channel-splitting filter; Be divided into 2 parts or 4 parts through coupling type channel-splitting filter 1 minute 2 or 1 minutes 4 (upgrading with) device; A part inputs to coupling type channel-splitting filter 1 minute 8 or 1 minutes 16 etc. (following road with); Be divided into 8 or 16 parts etc. by coupling type channel-splitting filter 1 minute 8 or 1 minutes 16 etc. (following road with) device, carry out selective reception by the tunable filter array; Other part can be reserved as usefulness to be upgraded.The optical signals tunable laser array received of setting out on a journey in this locality; After carrying out wavelength tuning; Exporting to coupling type wave multiplexer 8 closes 1 or 16 and closes (usefulness of setting out on a journey) device such as 1; Close 1 or 16 by coupling type wave multiplexer 8 and close (usefulness of setting out on a journey) device such as 1 and close ripple, after closing signal behind the ripple and the signal with port to be upgraded and being closed and 1 or 4 close 1 (upgrading with) device and closed ripple by coupling type wave multiplexer 2, the output light signal after WB blocks some wavelength closes 1 device by the type wave multiplexer 2 that is coupled and closes ripple and export.This method is simple in structure can realize folk prescription road and broadcast capability under the selection of business, but this scheme only to realize unidirectional wavelength block function flexibly, can't realize the Wavelength dispatching function of a plurality of directions.
Fig. 3 is that optical wavelength selects technical scheme to realize the block diagram of ROADM node.This scheme by light preamplifier (OPA), coupler, wavelength selection unit, power amplifier (OBA), down road wavelength selection and allocation units, tunable filtering and receiving element (RX), tunable setting out on a journey (TX), set out on a journey to close and involve allocation units and form.
In Fig. 3, the input optical signal of circuit is exported to coupler after being amplified by light preamplifier, is merotomized by the form of coupler with broadcasting, exports to down the wavelength selection unit of road wavelength selection and allocation units, all directions or the mouth etc. of upgrading respectively.From the coupler output of all directions, get into the light signal of road wavelength selection down and allocation units, following road wavelength is selected, and it is assigned to a plurality of tunable filterings and receiving element RX, carries out the wavelength selective reception.The tunable TX of setting out on a journey of optical signals that is set out on a journey by this node carries out tunable output, and getting into sets out on a journey to close involves allocation units, the light signal of a plurality of wavelength is closed ripple after, be assigned to the wavelength selection unit of all directions.The wavelength selection unit of all directions is closed from setting out on a journey and is involved allocation units output signal, all directions coupler output signal, exports to power amplifier after selecting wavelength and closing ripple, carries out power amplification by power amplifier, so that transmit.This method can realize multidirectional wavelength road configuration and scheduling feature up and down, the route protection function of the broadcast capability of support wavelength bearer service, wavelength loop fuction, wavelength.But this method is owing to there is 1 following road wavelength to select and allocation units, and different directions can not descend the light signal of the identical wavelength in road; And this method only has one to set out on a journey to close and involve allocation units, and the light signal difference of identical wavelength is set out on a journey from node.Because this shortcoming, make this method can not be practical in real network.
Fig. 4 is that optical wavelength selects technical scheme to realize the detailed diagram of multi-direction ROADM node.By A～X to light preamplifier, A～X to coupler, A～X to wavelength selection unit, A～X to power amplifier, down road wavelength selection and allocation units, tunable filtering and receiving element RX, the tunable TX of setting out on a journey, set out on a journey to close and involve allocation units and form.
In Fig. 4; A～X is after the circuit input optical signal of all directions is amplified by this direction light preamplifier; Export to coupler, merotomize by the form of coupler with broadcasting, export to down respectively road wavelength selection and allocation units, A～X to wavelength selection unit.From A～X to coupler output, get into that road wavelength is down selected and the light signal of allocation units, the wavelength selective reception is carried out in following road wavelength selection, and it is assigned to a plurality of tunable filterings and receiving element RX.The tunable TX of setting out on a journey of optical signals that is set out on a journey by this node carries out tunable output, and getting into sets out on a journey to close involves allocation units, the light signal of a plurality of wavelength is closed ripple after, be assigned to A～X to wavelength selection unit.A～X closes from setting out on a journey to the wavelength selection unit of all directions and involves allocation units output signal, A～X to coupler output signal, exports to power amplifier after selecting wavelength and closing ripple, carries out power amplification, so that transmit.
Fig. 5 is the block diagram according to the ROADM device of the realization flexible wavelength scheduling of the embodiment of the invention.ROADM device according to the embodiment of the invention adopts the optical wavelength selector to realize the ROADM device.As shown in Figure 5, comprise according to the configurable OADM apparatus of the embodiment of the invention: A to～X to line direction coupler or wavelength selection unit, Xia Lu unit, the unit of setting out on a journey, A to～X to line direction wavelength selection unit or coupler.
Wherein, as can be seen from Figure 5, the Xia Lu unit comprises: wavelength selection unit or coupler, demultiplexing unit and receiving element (RX).The unit of setting out on a journey comprises: the transmitter of setting out on a journey (TX), Multiplexing Unit and set out on a journey wavelength selection unit or coupler.
Wherein, A to～X to light signal input to the line direction coupler or the wavelength selection unit of this direction; Line direction coupler or wavelength selection unit by this direction are divided into the n part, export to respectively each Xia Lu unit, A to～X to line direction wavelength selection unit or coupler.Adopt coupler in input, when wavelength selection unit is adopted in output, can realize wavelength broadcasting, the loop fuction of line direction.A to～X to wavelength selection unit or coupler set out on a journey from each respectively the unit this direction the signal of setting out on a journey, A to～X to the signal of line direction coupler or wavelength selection unit output select the signal of specific wavelength; Export respectively after closing ripple, realize the length flexible scheduling feature.
Wherein, The annexation of each Xia Lu unit is following: each of all directions road output down given a wavelength selection unit or coupler; Select the wavelength any inequality of any direction respectively and close ripple output by wavelength selection unit or coupler; By demultiplexing unit (DEMUX) light signal is separated again, give receiver RX and receive, realize configurable road function down.Every group of Xia Lu unit all can descend the wavelength signals of any direction, organizes the Xia Lu unit more and can realize down the identical function of wavelength in road.
Wherein, The annexation of each unit of setting out on a journey is following: the wavelength emission of setting out on a journey machine TX accomplishes service access; Accomplish the ripple that closes of the signal of setting out on a journey again through Multiplexing Unit MUX; Again through signal through wavelength selection unit or coupler, selected light signal is closed ripple exports respective direction line direction wavelength selection unit or coupler to.Realize that wavelength is configurable and set out on a journey.Select coupler for use in the unit of setting out on a journey, wavelength selection unit is selected in line direction output for use, and the wavelength of setting out on a journey has broadcast capability.A plurality of unit of setting out on a journey, the identical wavelength signals of any direction of can setting out on a journey.
Fig. 6 is the block diagram according to the ROADM device of realization eight light directions of the embodiment of the invention.As shown in Figure 6, this ROADM device is by forming with the lower part: the WSS/ coupler of the WSS/ coupler of the line direction of direction 1～8, the line direction of direction 1～8, down WSS/ coupler, preamplifier PA, WSS/ coupler, demultiplexing unit DEMUX, the multiplexer MUX that sets out on a journey, the coupler/WSS that sets out on a journey, power amplifier BA, the WSS/ coupler of setting out on a journey on road down on road.
In Fig. 6, the optical signals WSS/ coupler of every direction input sends to the WSS/ coupler of Xia Lu unit, all directions with light signal, realizes the length flexible scheduling feature.Adopt coupler in input, when wavelength selection unit is adopted in output, can realize wavelength broadcasting, the loop fuction of line direction.
In Fig. 6; The WSS/ coupler on road is selected wavelength under every group from the signal of the circuit WSS/ coupler of all directions output, exports to preamplifier PA after closing ripple, is merotomized by the WSS/ coupler again; Every part is divided into single ripple with many ripples signal and is received by receiver through demultiplexing unit DEMUX.Every group of Xia Lu unit all can descend any wavelength signals of any direction, organizes the Xia Lu unit more and can realize down the identical function of wavelength in road.
In Fig. 6; Every group of multiplexer MUX that sets out on a journey closes ripple with the wavelength signals of transmitter output; Coupler/WSS selects wavelength from a plurality of closing the ripple signal through MUX, exports to power amplifier BA after closing ripple, selects wavelength to export to the WSS/ coupler of line direction by the WSS/ coupler again.Any wavelength signals of any direction all can be gone up in the every group of unit of setting out on a journey, and the identical function of wavelength of setting out on a journey can be realized in the unit of setting out on a journey of organizing more.
Fig. 7 is the block diagram according to the ROADM device of realization four light directions of the embodiment of the invention.As shown in Figure 7, this ROADM device is by forming with the lower part: A to～D to light preamplifier (OPA), A to～D to line direction 1 * 8 coupler, A to～D to line direction 8 * 1 WSS, A to～D to power amplifier (OBA), Xia Lu unit, the unit of setting out on a journey.
In Fig. 7, the light signal of every direction input is sent to 8 * 1 wavelength selection unit of Xia Lu unit, all directions with the form of broadcasting by insensitive 1 * 8 coupler of wavelength after amplifying through light preamplifier.Realized the wavelength broadcast capability.When the dotted line that links to each other with 8 * 1 wavelength selection unit when 1 * 8 coupler among Fig. 7 exists, can realize the wavelength loop fuction.
In Fig. 7,8 * 1 wavelength selection unit are selected wavelength from the signal of 1 * 8 coupler of the unit of setting out on a journey, all directions output, export to power amplifier after closing ripple, realize the length flexible scheduling feature.
Fig. 8 is a kind of realization block diagram of the Xia Lu unit among Fig. 7, forms by four groups altogether, and from left to right the 1st group and the 2nd group are made up of 4 * 1 wavelength-selective switches devices, image intensifer (OA), wavelength-selective switches device (WSS), receiver (RX); The 3rd group and the 4th group are made up of 4 * 1 wavelength-selective switches devices, image intensifer (OA), array waveguide grating (AWG), receiver (RX).
In Fig. 8; The 1st group and the 2nd group of Xia Lu unit; Each group selects any different wavelength of any direction to close ripple again by 14 * 1 wavelength-selective switches device;, OA is input to the wavelength-selective switches device after amplifying; Each output port of wavelength-selective switches device can select a wavelength signals to be received by receiver (RX) or each output port of wavelength-selective switches device is selected one group of wavelength signals, is selected to be received by receiver (RX) after the wavelength signals by each output port of a wavelength-selective switches device again.Realize the configurable road down of any wavelength signals of any direction.
In Fig. 8; The 3rd group and the 4th group of Xia Lu unit; Each group selects any different wavelength of any direction to close ripple again by 14 * 1 wavelength-selective switches device; After OA amplifies, be input to array waveguide grating (AWG), each output port of array waveguide grating (AWG) is exported a fixed wave length signal and is received by receiver (RX).Realize the following road of any wavelength signals of any direction, the port of following road wavelength is fixed.
The identical wavelength of four direction can be through not descending the road on the same group.
Fig. 9 is a kind of realization block diagram of the unit of setting out on a journey among Fig. 7, forms by four groups altogether, and from left to right the 1st group and the 2nd group is made up of tunable TX, coupler, image intensifer (OA), 1 * 4 coupler; The 3rd group and the 4th group are made up of fixed wave length TX, array waveguide grating (AWG), image intensifer (OA), 1 * 4 coupler.
In Fig. 9, the 1st group and the 2nd group of the unit of setting out on a journey, each organizes the tunable wave length that tunable TX accomplishes business access signal; After closing ripple by the optical signals coupler of tunable TX emission; Amplify through OA, be divided into four parts by 1 * 4 coupler again, deliver to 8 * 1 WSS of four direction.Realize configurable the setting out on a journey of any wavelength signals of any direction.
In Fig. 9, the 3rd group and the 4th group of the unit of setting out on a journey, each group TX accomplishes the wavelength Conversion function of business access signal; After closing ripple by the optical signals array waveguide grating (AWG) of TX emission; Amplify through OA, be divided into four parts by 1 * 4 coupler again, deliver to 8 * 1 WSS of four direction.Realize setting out on a journey of any wavelength signals of any direction, the port of the wavelength of setting out on a journey is fixed.
The identical wavelength of four direction can be through not setting out on a journey on the same group.
Figure 10 is the block diagram according to the ROADM device of realization four light directions of the embodiment of the invention.Shown in figure 10, this ROADM device is by forming with the lower part: A to～D to light preamplifier (OPA), A to～D to line direction 1 * 8WSS, A to～D to line direction 8 * 1 couplers, A to～D to power amplifier (OBA), Xia Lu unit, the unit of setting out on a journey.
In Figure 10, the light signal of every direction input selects wavelength to send to 8 * 1 couplers of Xia Lu unit, all directions by 1 * 8WSS after amplifying through light preamplifier, realizes the length flexible scheduling feature.When the dotted line that links to each other with 8 * 1 couplers when 1 * 8 wavelength selection unit among Figure 10 exists, can realize the wavelength loop fuction.
In Figure 10,8 * 1 couplers close the set out on a journey signal of 1 * 8 wavelength selection unit output of unit, all directions of ripple, export to power amplifier after closing ripple.
Figure 11 is a kind of realization block diagram of the Xia Lu unit among Figure 10, forms by four groups altogether, and from left to right the 1st group and the 2nd group are made up of 4 * 1 couplers, image intensifer (OA), wavelength-selective switches device (WSS), receiver (RX); The 3rd group and the 4th group are made up of 4 * 1 couplers, image intensifer (OA), array waveguide grating (AWG), receiver (RX).
In Figure 11; The 1st group and the 2nd group of Xia Lu unit; Each group is closed any different wavelength of ripple any direction by 14 * 1 coupler;, OA is input to the wavelength-selective switches device after amplifying; Each output port of wavelength-selective switches device can select a wavelength signals to be received by receiver (RX) or each output port of wavelength-selective switches device is selected one group of wavelength signals, is selected to be received by receiver (RX) after the wavelength signals by each output port of a wavelength-selective switches device again.Realize the configurable road down of any wavelength signals of any direction.
In Figure 11; The 3rd group and the 4th group of Xia Lu unit; Each group is closed any different wavelength of ripple any direction by 14 * 1 coupler; After OA amplifies, be input to array waveguide grating (AWG), each output port of array waveguide grating (AWG) is exported a fixed wave length signal and is received by receiver (RX).Realize the following road of any wavelength signals of any direction, the port of following road wavelength is fixed.
The identical wavelength of four direction can be through not descending the road on the same group.
Figure 12 is a kind of realization block diagram of the unit of setting out on a journey among Figure 10, forms by four groups altogether, and from left to right the 1st group and the 2nd group is made up of tunable TX, coupler, image intensifer (OA), 1 * 4 wavelength selection unit; The 3rd group and the 4th group are made up of fixed wave length TX, array waveguide grating (AWG), image intensifer (OA), 1 * 4 wavelength selection unit.
In Figure 12; Set out on a journey the 1st group and the 2nd group of unit; Each organizes the tunable wave length that tunable TX accomplishes business access signal, close ripple by the optical signals coupler of tunable TX emission after, amplify through OA; Select all directions signal of setting out on a journey by 1 * 4 wavelength selection unit again, deliver to 8 * 1 WSS of four direction.Realize configurable the setting out on a journey of any wavelength signals of any direction.
In Figure 12; Set out on a journey the 3rd group and the 4th group of unit; Each group TX accomplishes the wavelength Conversion function of business access signal, close ripple by the optical signals array waveguide grating (AWG) of TX emission after, amplify through OA; Select all directions signal of setting out on a journey by 1 * 4 wavelength selection unit again, deliver to 8 * 1 WSS of four direction.Realize setting out on a journey of any wavelength signals of any direction, the port of the wavelength of setting out on a journey is fixed.
The identical wavelength of four direction can be through not setting out on a journey on the same group.
Figure 13 is the block diagram according to the ROADM device of realization four light directions of the embodiment of the invention.Shown in figure 13, this ROADM device is by forming with the lower part: A to～D to light preamplifier (OPA), A to～D to line direction 1 * 5 coupler, A to～D to line direction 5 * 1 wavelength selection unit (WSS), A to～D to power amplifier (OBA), Xia Lu unit, the unit of setting out on a journey.
In Figure 13, the light signal of every direction input is sent to 5 * 1 wavelength selection unit of Xia Lu unit, all directions with the form of broadcasting by insensitive 1 * 5 coupler of wavelength after amplifying through light preamplifier.Wavelength broadcast capability, wavelength loop fuction have been realized.
In Figure 13,5 * 1 wavelength selection unit are selected wavelength from the signal of 1 * 5 coupler of the unit of setting out on a journey, all directions output, export to power amplifier after closing ripple, realize the length flexible scheduling feature.
Figure 14 is a kind of realization block diagram of the Xia Lu unit among Figure 13, can descend road 40 ripples, is made up of 1 * 5 coupler, 4 * 1 wavelength-selective switches devices, image intensifer (OA), 1 * 8 wavelength-selective switches device (WSS), receiver (RX).
In Figure 14; A～D to light signal be divided into five parts by 1 * 5 coupler respectively; Wherein each part has 14 * 1 wavelength-selective switches device to select any different wavelength of any direction to close ripple again; After OA amplifies, be input to 1 * 8 wavelength-selective switches device, each output port selects a wavelength signals to be received by receiver (RX).The identical wavelength of four direction can be through road under 1 * 8 different WSS.
Figure 15 is a kind of realization block diagram of the unit of setting out on a journey among Figure 13, and 40 ripples of can setting out on a journey are made up of tunable TX, 8 * 1 couplers, image intensifer (OA), 1 * 4 coupler, 5 * 1 wavelength-selective switches devices (WSS).
In Figure 15, tunable TX accomplishes the tunable wave length of business access signal, close ripple by 58 * 1 couplers of optical signals of tunable TX emission after; Amplify through OA; Be divided into four parts by 1 * 4 coupler again, deliver to 5 * 1 WSS of four direction, ripple is selected and closed to the wavelength of setting out on a journey.The identical wavelength of four direction can close ripple through 8 * 1 different couplers and set out on a journey.
In sum; The present invention is with the He Xialu that sets out on a journey of the ROADM device realization of merotomizing; Can solve the problem that existing ROADM device exists; When keeping existing ROADM device that the route protection function of broadcast capability, wavelength loop fuction, wavelength of flexible wavelength scheduling, wavelength configurable function, wavelength bearer service up and down is provided; Can the set out on a journey light signal of a plurality of identical wavelength, and can be, and all road port wavelength signals of any direction up and down all up and down at the light signal of the identical wavelength in road under the different directions.
The above is merely embodiments of the invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (10)
1. a configurable OADM apparatus of realizing flexible wavelength scheduling is characterized in that, comprising:
The line direction coupler or the wavelength selection unit of first direction to the k direction are used for light signal is divided into n part, export the line direction wavelength selection unit or the coupler of m Xia Lu unit and first direction to the k direction respectively to, and wherein n is greater than k;
Said Xia Lu unit, be used for to the light signal from the line direction of said first direction to the k direction select, demultiplexing and receiving;
The unit of setting out on a journey; Be used to generate the light signal of various wavelength; Light signal to said various wavelength carries out multiplexing; Light signal to the multiplexing various wavelength of process is selected, and exports selected light signal the line direction wavelength selection unit or the coupler of said first direction to the k direction to respectively;
The line direction wavelength selection unit or the coupler of said first direction to the k direction are used for the light signal of importing it is selected, and export after selected light signal is closed ripple;
Wherein, said Xia Lu unit comprises:
Wavelength selection unit or coupler are used for ripple is selected and closed to the light signal of exporting from the following road of said first direction to the k direction;
Demultiplexing unit is used for select and close the light signal demultiplexing behind the ripple from wavelength selection unit or coupler;
Receiving element is used for the single wave optical signal from demultiplexing unit output is received.
2. configurable OADM apparatus according to claim 1 is characterized in that, the said unit of setting out on a journey comprises:
The transmitter of setting out on a journey is used to generate the light signal of various wavelength;
Multiplexing Unit is used for the light signal of the transmitter output of setting out on a journey is closed ripple;
The wavelength selection unit of setting out on a journey or coupler are used for the light signal of importing it is selected, and export selected light signal to respective direction line direction wavelength selection unit or coupler.
3. configurable OADM apparatus according to claim 1; It is characterized in that; The line direction coupler or the wavelength selection unit of the input and output of said first direction to the k direction can be one of following combination: be input as coupler, be output as wavelength selection unit; Be input as wavelength selection unit, be output as wavelength selection unit, be input as wavelength selection unit, be output as coupler.
4. configurable OADM apparatus according to claim 1; It is characterized in that; Wavelength selection unit or coupler that the wavelength selection unit of each line direction or coupler all go out a following road port and Xia Lu unit at least link to each other, and with this a plurality of light signals of road direction are down combined.
5. configurable OADM apparatus according to claim 1; It is characterized in that; The wavelength selection unit of each line direction or coupler all have at least a wavelength selection unit or a coupler of going up the road port and the unit of setting out on a journey to link to each other, and are sent to a plurality of line directions with this signal of will setting out on a journey.
6. configurable OADM apparatus according to claim 1; It is characterized in that; Can have a plurality of Xia Lu unit and set out on a journey the unit, wavelength selection unit or coupler on each Xia Lu unit and set out on a journey unit and the circuit couple together, with road about the wavelength of supporting more orientation independent property.
7. configurable OADM apparatus according to claim 1 is characterized in that, but the setting out on a journey and wavelength selection unit or coupler that following road port cascade the is new of wavelength selection unit of line direction or coupler, to save the port number of line direction.
8. configurable OADM apparatus according to claim 1 is characterized in that, k is the integer more than or equal to 2, and n is the integer greater than 2, and m is the integer more than or equal to 0.
9. configurable OADM apparatus according to claim 1 is characterized in that the demultiplexing unit of Xia Lu unit can be wavelength selection unit, accomplishes road under the Wavelength-independent property; The demultiplexing unit of Xia Lu unit also can be the demultiplexing device of wavelength sensitive type, accomplishes road under the fixed wave length.
10. configurable OADM apparatus according to claim 1 is characterized in that the transmitter of the unit of setting out on a journey can be the tunable wave length transmitter, and Multiplexing Unit can be the insensitive coupling type of wavelength wave multiplexer spare, accomplishes Wavelength-independent property and sets out on a journey; The transmitter of unit of setting out on a journey can be the wavelength stationary transmitter, and Multiplexing Unit can be wavelength sensitive type wave multiplexer spare, accomplishes fixed wave length and sets out on a journey.
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| CN101610129B (en) * | 2009-07-09 | 2012-10-10 | 中兴通讯股份有限公司 | Reconfigurable Optical Add and Drop Multiplexing device for realizing completely undamped wavelength independence |
| CN102696194B (en) * | 2011-07-22 | 2014-12-10 | 华为技术有限公司 | Restructurable optical add-drop multiplexer and wavelength cross connect |
| CN103023599A (en) * | 2011-09-20 | 2013-04-03 | 武汉邮电科学研究院 | Reconfigurable optical add-drop multiplexer and reconfigurable optical add-drop multiplexing method |
| CN104104463A (en) * | 2013-04-09 | 2014-10-15 | 中兴通讯股份有限公司 | Optical-signal uplink multiplexing method and device, and reconfigurable optical add drop multiplexing system |
| CN104104464B (en) * | 2013-04-12 | 2018-03-13 | 中兴通讯股份有限公司 | The output intent of restructural add-drop multiplexer and ripple |
| US9215028B2 (en) * | 2013-09-09 | 2015-12-15 | Huawei Technologies Co., Ltd. | Photonic switch chip for scalable reconfigurable optical add/drop multiplexer |
| EP3076574B1 (en) | 2013-12-31 | 2017-09-27 | Huawei Marine Networks Co., Ltd. | Optical add-drop multiplexer and branching unit |
| CN104345391B (en) * | 2014-10-16 | 2018-05-29 | 浙江大学 | The All-optical routing device of modular extendable |
| CN107949994B (en) | 2015-09-08 | 2019-07-19 | 华为技术有限公司 | OADM node and method in a kind of wdm system |
| CN106788864B (en) * | 2016-11-28 | 2018-06-19 | 广西大学 | A kind of integrated reconfigurable optical add-drop multiplexer |
| CN108260031B (en) * | 2016-12-29 | 2022-04-15 | 中兴通讯股份有限公司 | Optical switching device and control method |
| WO2019006758A1 (en) * | 2017-07-07 | 2019-01-10 | 华为技术有限公司 | Optical add-drop multiplexer and optical communication apparatus |
| CN107342821B (en) * | 2017-07-18 | 2021-10-15 | 华为技术有限公司 | Optical module, network equipment, optical system and communication system |
| CN109802744B (en) * | 2019-03-20 | 2020-09-04 | 深圳市腾讯计算机系统有限公司 | Reconfigurable optical add-drop multiplexer, optical network and optical signal processing method |
| WO2022040880A1 (en) * | 2020-08-24 | 2022-03-03 | Alibaba Group Holding Limited | Heterogeneous optical network |
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