CN101977336B - Bragg diffraction principle-based optical packet switching system and method - Google Patents
Bragg diffraction principle-based optical packet switching system and method Download PDFInfo
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Abstract
The invention relates to a Bragg diffraction principle-based optical packet switching system and a Bragg diffraction principle-based optical packet switching method. The system comprises an optical packet generating module, an optical payload and optical label separation module, a label processing module and an optical switching module, wherein an optical packet generated by the optical packet generating module enters the optical payload and optical label separation module after passing through a fiber and then is separated into two paths of optical payload and one path of optical label, a routing control signal is output to the optical switching module after the optical label and one path of optical payload enter the label processing module, and the other path of optical payload directly enters the optical switching module and is output according to the routing control signal. The system and the method have the advantage of high transmission efficiency.
Description
Technical field
The invention belongs to technical field of optical fiber communication, relate in particular to the optical packet switching technique field.
Background technology
The continuous increase of network packet traffic carrying capacity has higher requirement for the exchange capacity of network node.For this reason, people have proposed light packet switching (Optical Packet Switching, OPS) technology, are considered to the direction of development of optical network of future generation, and are subject to extensive concern.The smallest particles of light packet switching is the light grouping, and it is comprised of light payload and optical label two parts, the data that the light payload namely need transmit, and it is all the time at the transmission of light territory, the data message that is equivalent to transmit in the optical transfer network; Optical label then carries the information of routing and swiching, can carry out opto-electronic conversion at node, is used for the control optical switch matrix, is equivalent to the control information in the ASON.
In optical packet switch network, the identifying processing of optical label is very crucial.Present existing optical label identifying processing scheme comprises: bit serial (Bit-serial) optical label processing scheme, quadrature modulation (Orthogonal Modulation) optical label processing scheme, subcarrier (Subcarrier Multiplex:SCM) optical label processing scheme and multi-wavelength (Wavelength Division Multiplex:WDM) optical label processing scheme etc.In the SCM tag processes scheme, light payload and optical label are transmitted by Same Wavelength, and they adopt respectively base band and subcarrier dot modulation technique to obtain; This scheme can realize separating of light payload and optical label very easily, but the intervention of subcarrier can reduce the transmission quality of channel.WDM tag processes scheme is carried optical label with specific wavelength, thereby is easy to realize optical label identification, but optical label has taken extra wavelength channel, has reduced the utilance of channel.
Separate WDM tag processes scheme and the SCM tag processes scheme of transmitting at frequency domain for optical label and light payload, utilize filter just can realize the extraction of label at the network node place, for example utilize Fiber Bragg Grating FBG (the Fiber Bragg Grating of an arrowband, FBG) filter, with Prague (Bragg) wavelength alignment light label or light payload, thereby make transmission of a reflection of optical label and light payload realize both separation, the FBG filter is the light sensitivity with fiber optic materials, in fibre core, form periodic Refractive index modulation distribution, thereby the frequency of phase matched in the incident light wave is produced coherent reflection.The advantage of this scheme is simple in structure, be easy to realize, just fixing unadjustable after but the transmission characteristic of existing FBG filter completes, can only process a light grouping that channel is corresponding, each channel needs a FBG filter to carry out separating of optical label and light payload like this.Because an optical fiber often comprises tens wavelength channels simultaneously, existing processing scheme just must arrange the FBG filter of respective amount, has increased the complexity of optical packet switching system, has also reduced flexibility and the efficiency of transmission of system simultaneously.
Summary of the invention
The objective of the invention is to have proposed optical packet switching system and method based on the Bragg diffraction principle in order to overcome the low deficiency of efficiency of transmission in the existing optical label identifying processing scheme.
To achieve these goals, technical scheme of the present invention is: based on the optical packet switching system of Bragg diffraction principle, comprise light grouping generation module, light payload and optical label separation module, label processing module and optical switch module, it is characterized in that, the light grouping that light grouping generation module produces is separated into two-way light payload and one road optical label by entering light payload and optical label separation module behind the optical fiber, output route control signal was to optical switch module after optical label and one road light payload entered label processing module, and another road light payload directly enters optical switch module and exports according to the route control signal;
Described light grouping generation module comprises laser, light intensity modulator, data message terminal and microwave magneto optical modulator, and wherein laser is introduced the microwave magneto optical modulator with light behind light intensity modulator; The data message terminal has two ports, links to each other respectively the data that output will transmit and corresponding routing iinformation with the microwave magneto optical modulator with light intensity modulator;
The Bragg diffraction effect of described microwave magneto optical modulator produces the light grouping, and light signal is divided into not diffraction light and diffraction light under the Bragg of microwave magneto optical modulator diffraction, and both wavelength are different, and they correspond respectively to light payload and optical label; The routing iinformation of label represents with the relative power ratio of light payload with optical label, and the Bragg diffraction efficiency of it and microwave magneto optical modulator has one to one relation, can be by transferring the drive current change of microwave magneto optical modulator;
Described label processing module comprises the first photodetector and the second photodetector and luminous power comparator, the first photodetector and the second photodetector are converted into the signal of telecommunication with the optical label of input and the luminous power of light payload respectively, and the output of the first photodetector and the second photodetector links to each other with the luminous power comparator; The luminous power comparator calculates the luminous power ratio of optical label and light payload by computing circuit, and this luminous power ratio can represent routing iinformation, and the output of luminous power comparator links to each other with route control unit; The light payload is divided into two-way by beam splitter, and one the tunnel enters label processing module and optical label carries out power ratio, extracts exchanging routing information and also sends into route control unit and produce the route control signal; Another road is by forming new light grouping behind the optical switch matrix with by the new optical label that produces of label generation module.
To achieve these goals, the invention allows for the light grouping exchange method based on the Bragg diffraction principle, comprise step:
(1) at light grouping generation module, the data communication device that need to transmit is crossed light intensity modulator and is loaded into the light territory, and routing iinformation then is loaded into the light territory by the microwave magneto optical modulator, thereby forms the light grouping;
(2) at light payload and optical label separation module, magneto-optic grating-enamel amber (MOG-FP) filter makes optical label and light payload respectively transmission and reflection, realizes that the optical label of light grouping separates with the light payload;
(3) in label processing module, optical label and light payload are carried out power ratio, obtain luminous power than the routing iinformation of value representation, route control unit in the optical switch module produces the route control signal according to this routing iinformation, and optical switch matrix carried out correct configuration, make the light payload exchange to output port corresponding with routing iinformation in the optical switch matrix, the optical switch matrix of optical switch module makes the light payload from correct port output by routing iinformation;
(4) at optical switch module, the routing iinformation of next node is loaded into the light territory by the optical label generation unit, and then the light grouping new with the light payload composition of optical switch matrix output export from optical switch module;
Be cycled to repeat above-mentioned steps, just constantly form new light grouping and continue to transmit to next node.
The invention has the beneficial effects as follows: the present invention utilizes the Bragg diffraction effect of microwave magneto optical modulator to produce the light grouping, label information represents with the luminous power relative size of payload and label, the Microwave Magnetostatic Waves that proportion is lower carries out the diffraction modulation to the payload light signal, optical label separates transmission from the light payload with slightly different frequencies in same wavelength channel, can have magnetic adjustable MOG-FP filter transmission and reflection by one, both are separated, basically can not affect the signal quality of payload, the also outer wavelength channel of occupying volume not is so the present invention has the characteristics of very high efficiency of transmission.Further, the present invention also have following a bit: (1) the present invention utilizes microwave magneto optical modulator light to produce optical label, have simple in structure, be easy to integrated characteristics.(2) the present invention utilizes relative luminous power (being luminous power ratio) expression routing iinformation, is easy to process in electric territory.(3) the present invention adopts the MOG-FP filter to carry out optical label to separate with the light payload, have the magnetic tunable characteristic, can be used for the processing to the multichannel wavelength signals, and as passive device, fast response time.(4) the optical label method of the present invention's employing can with other optical label scheme combination, such as bit serial optical label and quadrature modulating optical label, thereby increase the label capacity.(5) the present invention utilizes Microwave Magnetostatic Waves to cause the Bragg diffraction, the diffraction light of output the and wavelength difference of diffraction light is unsuitable, the both unlikely too large width that surpasses single wavelength channel, the again unlikely too little difficulty that causes separation.
Description of drawings
Fig. 1 is the integrally-built theory diagram of the present invention.
Fig. 2 is the integrally-built concrete theory diagram of the present invention that launches on Fig. 1 basis.
Fig. 3 is the frequency domain figure of the light signal of laser generation.
Fig. 4 is the time-domain diagram of the light signal of laser generation.
Fig. 5 represents the light grouping frequency domain figure of microwave magneto optical modulator output.
Fig. 6 represents MOG-FP filter 22 isolated optical label frequency domain figures.
Fig. 7 represents MOG-FP filter 22 isolated smooth payload frequency domain figures.
Fig. 8 represents MOG-FP filter 22 isolated smooth payload time-domain diagrams.
Description of reference numerals: light grouping generation module 1, laser 11, light intensity modulator 12, data message terminal 13, microwave magneto optical modulator 14, light payload and optical label separation module 2, optical circulator 21, MOG-FP filter 22, beam splitter 23, label processing module 3, the first photodetector 31, the second photodetector 31, luminous power comparator 33, optical switch module 4, optical switch matrix 41, route control unit 42, optical label generation unit 43.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
As shown in Figure 1, optical packet switching system based on the Bragg diffraction principle, comprise light grouping generation module 1, light payload and optical label separation module 2, label processing module 3 and optical switch module 4, the light grouping that light grouping generation module 1 produces is separated into two-way light payload and one road optical label by entering light payload and optical label separation module 2 behind the optical fiber, optical label and one road light payload enter label processing module 3 rear output route control signals to optical switch module 4, and another road light payload directly enters optical switch module 4 and exports according to the route control signal.
As shown in Figure 2, the below is described further the concrete structure that forms optical packet switching system of the present invention.
Light grouping generation module 1 comprises laser 11, light intensity modulator 12, data message terminal 13 and microwave magneto optical modulator 14, and wherein laser 11 is introduced microwave magneto optical modulator 14 with light behind light intensity modulator 12.Data message terminal 13 has two ports, links to each other respectively the data that output will transmit and corresponding routing iinformation with microwave magneto optical modulator 14 with light intensity modulator 12.
Operation principle and the acousto-optic modulator of microwave magneto optical modulator 14 are similar, and it is comprised of optical coupling input, optical coupling output, magneto-optic thin film waveguide and externally-applied magnetic field unit.Under the effect that adds magnetic field H 0, be the microstrip transducer (Microstrip Transducer) of L by length, microwave current can excite magnetostatic wave in thickness is the magneto-optic thin film of d, magnetostatic wave causes that the cycle of waveguide material refractive index changes, form mobile grating, thereby the Bragg(Prague that causes the incident guided wave) diffraction, its diffraction efficiency power ratio of incident light (diffraction light with) is relevant with the phase mismatch of the microwave current intensity that excites magnetostatic wave and guided wave.Because diffraction efficiency is difficult to reach 100%, so the output guided wave can comprise diffraction light and diffraction light two parts not usually, the frequency displacement of diffraction light equals the magnetostatic wave frequency f
s, about 0.5-30GHz or higher frequency range.And according to the phase-matching condition in the Bragg diffraction, the multifrequency magnetostatic wave can be inputted light to multichannel and modulate.In addition, studies show that, when guided wave pulse duration during greater than 1.1ps (near the data transfer rate of 1Tb/s), substantially close to the continuous situation of guided wave incident, and the output optical pulse shape remains unchanged magnetostatic wave substantially to the peak value diffraction efficiency of light pulse continuously.That is to say that under normal conditions, magnetostatic wave can be by the continuous light approximate processing to the diffraction of guided wave pulse.When other condition was constant, diffraction efficiency was only relevant with the drive current of microstrip transducer.
The present invention utilizes the Bragg diffraction effect of microwave magneto optical modulator to produce the light grouping, light signal is under the Bragg of microwave magneto optical modulator 14 diffraction, be divided into not diffraction light and diffraction light, both wavelength are slightly different, and they correspond respectively to light payload and optical label.The routing iinformation of label represents with the relative power ratio of light payload with optical label, and the Bragg diffraction efficiency of it and microwave magneto optical modulator 14 has one to one relation, can be by transferring the drive current change of microwave magneto optical modulator 14.Because optical label is different with the wavelength of light payload, can by transmission and the reflection of following MOG-FP filter 22, both be separated.
Light payload and optical label separation module 2 comprise that optical circulator 21, magneto-optic grating-enamel amber (MOG-FP) filter 22, beam splitter 23 form, a part of transmission part of dividing into groups the light that MOG-FP filter 22 will be inputted reflects, thereby realizes separating of optical label and light payload; Optical circulator 21 will be outputed to beam splitter 23 to port 3 by the optical signals port 2 of MOG-FP filter 22 reflections after its port one receives the light grouping, the light signal of transmission directly is input to the MOG-FP filter from its port 2; Beam splitter 23 will be inputted light and be divided into two bundles, and wherein the decay of the port one of beam splitter 23 is same with the decling phase that passes through MOG-FP filter 22, and port 2 links to each other with optical switch matrix 41 and exports the light payload.
The MOG-FP filter of indication of the present invention is Fabry-Perot (Fabry-P é rot, the FP) chamber that is formed by two magneto-optic gratings (magneto-opticalGrating, MOG).The MOG-FP filter is a kind of optical grating construction with magneto optical effect, can pass through at traditional F BG(Fiber Bragg Grating, Fiber Bragg Grating FBG) mixes in that the elements such as cerium, bismuth strengthen magneto-optical property or write the method such as grating at the yttrium iron garnet optical fiber that draws and obtain, also can adopt the alternate manners such as magneto-optic multilayer film or One-Dimension Magnetic photon crystal structure to realize.The MOG-FP filter is arranged in solenoid, and the field controller that is connected with solenoid changes the magnetic field that solenoid produces by the size of control inputs electric current, thereby realizes the adjustable filtering of magnetic of MOG-FP filter.
Can show single-pass or comb filtering characteristic in the reflection bandwidth of the transmission spectrum of MOG-FP filter according to the long MOG that do not coexist in FP chamber, therefore it can be used for extracting as band pass filter the optical label of single channel, can be used for separating of multichannel optical label and light payload as comb filter again.The principle of MOG-FP filter separated light label and light payload and FBG(Fiber Bragg Grating, Fiber Bragg Grating FBG) similar, optical label or light payload are aimed at the transmission peaks of MOG-FP filter, thereby can see through the MOG-FP filter, and another is then reflected by the MOG-FP filter.And under the effect of magneto optical effect, the variation of externally-applied magnetic field can make the transmission spectrum of the left-right rotary circularly polarized light of propagating among the MOG-FP be moved.Utilize this special construction of MOG-FP filter and intrinsic characteristic, can realize the function of the adjustable filtering of magnetic, so the MOG-FP filter is applicable to wavelength division multiplexed network.
Label processing module comprises two the first photodetectors 31 and the second photodetector 31 and luminous power comparator 33, the first photodetector 31 and the second photodetector 31 are converted into the signal of telecommunication with the optical label of input and the luminous power of light payload respectively, and the output of the first photodetector 31 and the second photodetector 31 links to each other with luminous power comparator 33; Luminous power comparator 33 calculates the luminous power ratio of optical label and light payload by computing circuit, and this luminous power ratio can represent routing iinformation, and the output of luminous power comparator 33 links to each other with route control unit 42.The light payload is divided into two-way by beam splitter 23, and one the tunnel enters following label processing module 3 carries out power ratio with optical label, extracts exchanging routing information and send into route control unit 42 to produce the route control signal; Another road by behind the following optical switch matrix 41 with forms new light by the label generation module 43 new optical labels that produce (by luminous power than value representation) and divides into groups.
The present invention utilizes the Bragg diffraction effect of microwave magneto optical modulator to produce the light grouping, and the routing iinformation of optical label represents with the luminous power relative size (being the relative power ratio) of light payload and optical label.The light payload is under the Bragg of magneto optical modulator diffraction, be divided into not diffraction light and diffraction light, both wavelength are slightly different, they correspond respectively to light payload and optical label, it with the Bragg diffraction efficiency of aforesaid microwave magneto optical modulator 14 have corresponding one by one, can be by adjusting the drive current change of magneto optical modulator.
Optical switch module comprises optical switch matrix 41, route control unit 42, optical label generation unit 43, route control unit 42 port ones link to each other with optical switch matrix 41, and route control unit 42 obtains the route control signal with the output of 41 pairs of light payloads of control optical switch matrix by luminous power comparator 33; One input of optical label generation unit 43 links to each other with the output of optical switch matrix 41, and another input links to each other with the port 2 of route control unit 42, to obtain the routing iinformation of next node, forms new light grouping.
Corresponding to above-mentioned optical packet switching system based on the Bragg diffraction principle, the present invention also provides the light grouping exchange method based on the Bragg diffraction principle, and its step is as follows:
(1) at light grouping generation module 1, the data communication device that need to transmit is crossed light intensity modulator 12 and is loaded into the light territory, and routing iinformation then is loaded into the light territory by microwave magneto optical modulator 14, thereby forms the light grouping;
In this step, the continuous light that sends from laser 11 can be modulated to the flashlight that is loaded with the transmission of data through behind the light intensity modulator 12.Routing iinformation changes diffraction efficiency, thereby is loaded into the light territory, and produce the light grouping by the drive current input microwave magneto optical modulator 14 of microstrip transducer.
(2) at light payload and optical label separation module 2, MOG-FP filter 22 makes optical label and light payload respectively transmission and reflection, realizes that the optical label of light grouping separates with the light payload;
In this step, can make the transmission peaks of MOG-FP filter 22 become very thin by the MOG reflectivity that improves, be convenient to accurately separated light grouping.Optical label in the grouping of the transmission peaks of MOG-FP filter 22 and light or the wavelength of light payload are aimed at, and it is adjusted to pass through externally-applied magnetic field in case of necessity, makes the effect of separation reach best.
(3) in label processing module 3, optical label and light payload are carried out power ratio, obtain luminous power than the routing iinformation of value representation, route control unit 42 in the following optical switch module 4 produces the route control signal according to this routing iinformation optical switch matrix 41 is carried out correct configuration, make the light payload exchange to output port corresponding with routing iinformation in the optical switch matrix 41, this is because optical switch matrix has a plurality of inputs, output port, can controllably be connected to arbitrary output port to the fiber-optic signal of arbitrary input port, thereby realize the Route Selection of light payload; In this step, light signal becomes the signal of telecommunication through opto-electronic conversion, then draws its power ratio, i.e. routing iinformation by computing circuit.The optical switch matrix 41 of optical switch module 4 makes the light payload from correct port output by routing iinformation.
(4) at optical switch module 4, the routing iinformation of next node is loaded into the light territory by optical label generation unit 43, and the light grouping new with the light payload composition of optical switch matrix 41 outputs is then from optical switch module 4 outputs.
Be cycled to repeat above-mentioned steps, just constantly form new light grouping and continue to transmit to next node.
The present invention is described further below in conjunction with specific embodiment.
The operation wavelength λ of the laser 11 of light grouping generation module 1=1552.52nm, the pseudo-random data speed of Gauss's pattern is 10Gb/s.Fig. 3, Fig. 4 represent respectively time-domain diagram and the frequency domain figure of the light signal that laser 11 produces.The grouping of diffraction generation light occurs through microwave magneto optical modulator 14 in light signal subsequently, and magnetostatic wave frequency is 10GHz, so the diffraction light wavelength is 1552.44nm.Fig. 5 represents the light grouping spectrogram through 14 outputs of microwave magneto optical modulator, and wherein the strength of carrier of optical label is than the low 5dBm of light payload.The light grouping enters network node and carries out the optical label processing after the 50km Optical Fiber Transmission.
MOG-FP filter 22 centre wavelengths are that 1552.4nm, bandwidth are 10GHz.After MOG-FP filter 22 was incided in light grouping, optical label was with transmissive, and the light payload then reflects, isolated optical label frequency domain figure as shown in Figure 6, isolated smooth payload frequency domain figure is as shown in Figure 7.The light payload that is reflected is divided into two-way by behind the optical circulator 21 by beam splitter 23, appropriately designs splitting ratio and can make the decay of one road light payload signal wherein same through the decling phase of MOG-FP filter 22 with label; This road light payload and optical label are converted into the signal of telecommunication by photodiode 31,32, and the size by more corresponding electric current rules out label routing information and sends into route control unit 42 and produce the route control signals, and then control optical switch matrix 41.After another road light payload was exported through optical switch matrix 41, the light grouping new with new optical label composition continued transmission.Fig. 8 and Fig. 4 comparison shows that, the impact that this scheme can't be very large on waveform generation, so relative and other label form, and this scheme does not need to introduce extra shaping process.
Take the optical switch matrix 41 of three ports as example, the care label processing procedure.When table 1 has provided the drive current I0 that sets respectively three kinds of microwave magneto optical modulators 14, the label value of the diffraction efficiency of their correspondences, transmission and extraction (simulation result), and corresponding optical switch matrix 41 port numberings, wherein " label value " refers to that it is corresponding to the power ratio of light payload and optical label by the result of label processing module measurement.
The corresponding relation of table 1 drive current and label value
Those of ordinary skill in the art will appreciate that embodiment described here is in order to help reader understanding's principle of the present invention, should to be understood to that protection scope of the present invention is not limited to such special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combinations that do not break away from essence of the present invention according to these technology enlightenments disclosed by the invention, and these distortion and combination are still in protection scope of the present invention.
Claims (4)
1. based on the optical packet switching system of Bragg diffraction principle, comprise light grouping generation module, light payload and optical label separation module, label processing module and optical switch module, it is characterized in that, the light grouping that light grouping generation module produces is separated into two-way light payload and one road optical label by entering light payload and optical label separation module behind the optical fiber, output route control signal was to optical switch module after optical label and one road light payload entered label processing module, and another road light payload directly enters optical switch module and exports according to the route control signal;
Described light grouping generation module comprises laser, light intensity modulator, data message terminal and microwave magneto optical modulator, and wherein laser is introduced the microwave magneto optical modulator with light behind light intensity modulator; The data message terminal has two ports, links to each other respectively the data that output will transmit and corresponding routing iinformation with the microwave magneto optical modulator with light intensity modulator;
The Bragg diffraction effect of described microwave magneto optical modulator produces the light grouping, and light signal is divided into not diffraction light and diffraction light under the Bragg of microwave magneto optical modulator diffraction, and both wavelength are different, and they correspond respectively to light payload and optical label; The routing iinformation of label represents with the relative power ratio of light payload with optical label, and the Bragg diffraction efficiency of it and microwave magneto optical modulator has one to one relation, can be by transferring the drive current change of microwave magneto optical modulator;
Described label processing module comprises the first photodetector and the second photodetector and luminous power comparator, the first photodetector and the second photodetector are converted into the signal of telecommunication with the optical label of input and the luminous power of light payload respectively, and the output of the first photodetector and the second photodetector links to each other with the luminous power comparator; The luminous power comparator calculates the luminous power ratio of optical label and light payload by computing circuit, and this luminous power ratio can represent routing iinformation, and the output of luminous power comparator links to each other with route control unit; The light payload is divided into two-way by beam splitter, and one the tunnel enters label processing module and optical label carries out power ratio, extracts exchanging routing information and also sends into route control unit and produce the route control signal; Another road is by forming new light grouping behind the optical switch matrix with by the new optical label that produces of label generation module.
2. the optical packet switching system based on the Bragg diffraction principle according to claim 1, it is characterized in that, light payload and optical label separation module comprise optical circulator, magneto-optic grating-enamel amber (MOG-FP) filter, beam splitter, a part of transmission part of dividing into groups the light that the MOG-FP filter will be inputted reflects, thereby realizes separating of optical label and light payload; Optical circulator will be outputed to beam splitter by optical signals port to the port that the MOG-FP filter reflects after its port receives the light grouping, the light signal of transmission directly is input to the MOG-FP filter from its port; Beam splitter will be inputted light and be divided into two bundles, and wherein the decay of the port of beam splitter is same with the decling phase that passes through the MOG-FP filter, and port links to each other with optical switch matrix and exports the light payload.
3. the optical packet switching system based on the Bragg diffraction principle according to claim 1, it is characterized in that, above-mentioned optical switch module comprises optical switch matrix, route control unit, optical label generation unit, the route control unit port links to each other with optical switch matrix, and route control unit is obtained the route control information with the output of control optical switch matrix to the light payload from the luminous power comparator; One input of optical label generation unit links to each other with the output of optical switch matrix, and another input links to each other with the port of route control unit, to obtain the routing iinformation of next node, forms new light grouping.
4. based on the light grouping exchange method of Bragg diffraction principle, comprise step:
(1) at light grouping generation module, the data communication device that need to transmit is crossed light intensity modulator and is loaded into the light territory, and routing iinformation then is loaded into the light territory by the microwave magneto optical modulator, thereby forms the light grouping;
(2) at light payload and optical label separation module, magneto-optic grating-enamel amber (MOG-FP) filter makes optical label and light payload respectively transmission and reflection, realizes that the optical label of light grouping separates with the light payload;
(3) in label processing module, optical label and light payload are carried out power ratio, obtain luminous power than the routing iinformation of value representation, route control unit in the optical switch module produces the route control signal according to this routing iinformation, and optical switch matrix carried out correct configuration, make the light payload exchange to output port corresponding with routing iinformation in the optical switch matrix, the optical switch matrix of optical switch module makes the light payload from correct port output by routing iinformation;
(4) at optical switch module, the routing iinformation of next node is loaded into the light territory by the optical label generation unit, and then the light grouping new with the light payload composition of optical switch matrix output export from optical switch module;
Be cycled to repeat above-mentioned steps, just constantly form new light grouping and continue to transmit to next node.
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| CN104613987B (en) * | 2015-02-06 | 2016-10-12 | 哈尔滨工业大学 | A kind of sufficient center wavelength accuracy apparatus and method based on FFP-TF |
| CN106500834A (en) * | 2016-10-28 | 2017-03-15 | 何桂崧 | A kind of light power meter test system |
| CN112291016B (en) * | 2020-10-30 | 2021-09-17 | 台州科技职业学院 | Method for realizing label signal modulation by pseudo-orthogonal line coding under non-orthogonal modulation |
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| EP0334054A2 (en) * | 1988-02-29 | 1989-09-27 | CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A. | Node for a fast packet-switching network in optical-electrical technology |
| CN101188534A (en) * | 2007-12-11 | 2008-05-28 | 中兴通讯股份有限公司 | A device and method for realizing signaling communication network and network communication network channel |
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| EP0334054A2 (en) * | 1988-02-29 | 1989-09-27 | CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A. | Node for a fast packet-switching network in optical-electrical technology |
| CN101188534A (en) * | 2007-12-11 | 2008-05-28 | 中兴通讯股份有限公司 | A device and method for realizing signaling communication network and network communication network channel |
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