CN104503184B - A kind of line electric light priority encoder of new 4 line 2 based on micro-ring resonator - Google Patents
A kind of line electric light priority encoder of new 4 line 2 based on micro-ring resonator Download PDFInfo
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- CN104503184B CN104503184B CN201410774668.1A CN201410774668A CN104503184B CN 104503184 B CN104503184 B CN 104503184B CN 201410774668 A CN201410774668 A CN 201410774668A CN 104503184 B CN104503184 B CN 104503184B
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
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Abstract
A kind of line electric light priority encoder of new 4 line 2 based on micro-ring resonator, including four micro-ring resonators and three straight wave guides, the first straight wave guide and the second straight wave guide intersect vertically, and form right angle coordinate system, the 3rd straight wave guide is parallel with the first straight wave guide；The silica-based nanowire micro-loop of one micro-ring resonator is located at rectangular coordinate system fourth quadrant, and positioned between the first straight wave guide and the 3rd straight wave guide；The silica-based nanowire micro-loop of second micro-ring resonator is located at the rectangular coordinate system third quadrant, and the silica-based nanowire micro-loop of other two micro-ring resonator is located at the quadrant of rectangular coordinate system second.The priority encoder overcomes speed, power consumption, gate delay and the bottleneck problem such as competition and risk in conventional electrical encoder, realize the information processing of high-speed high capacity, serious forgiveness is good, and small, the low in energy consumption and easy of integration modern integrated circuits premise of device volume is maintained, it can be played a significant role in Photonic Communications and photon information processing system.
Description
Technical field
The invention belongs to technical field of photo communication, it is related to a kind of electric light priority encoder, more particularly to it is a kind of based on micro-loop
The line electric light priority encoder of new 4 line -2 of resonator.
Background technology
Develop with the continuation of semiconductor technology, the integrated level more and more higher of chip or integrated circuit, the chi of integrated component
Very little further diminution, electric leakage and the heat dissipation problem of conventional electrical device can not be solved well, the clock skew and electromagnetism of circuit
Interference is also increasingly severe.The faster processing speed that people require can not rely on the electronics that information carrier is done using electronics
Circuit is obtained, and optic communication and optical computing system are using photon as information carrier, photon neutral, is not present between them
Electromagnetism field interactions.A few beam parallel lights are propagated in free space, intersect propagation, are not disturbed each other, light
The concurrency of signal transmission causes optical system to have information channel more broader than electricity system；Replace wire to interconnect with light network,
Photon hardware replaces electronic hardware, replaces electric computing with optical operation, and integrated optical circuit is constituted by optical fiber and various optical elements, can be with
The ability to data operation, transmission and storage is greatly improved, the low power consuming of photonic device is added, photonic device has been caused more
Carry out the attention of more scientific research personnel.
In computer systems, in order to distinguish a series of things, by each things with a binary system code table
Show, here it is the implication of coding.The logic function of encoder is exactly to produce this binary series code.Encoder be communication and
Essential element in calculating network.Optical encoder is also indispensable for optical information system, but common volume
The fault freedom of code device is poor, when inputting multiple signals simultaneously, will cause confusion or wrong coding.
The content of the invention
Preferentially compiled it is an object of the invention to provide a kind of good line electric light of new 4 line -2 based on micro-ring resonator of serious forgiveness
Code device, in the case of multiple signals are inputted at the same time, can enter according to pre-determined priority to the signal of highest priority
Row coding, is not in chaotic or mistake coding.
To achieve the above object, the technical solution adopted in the present invention is：A kind of new 4 line -2 based on micro-ring resonator
The first straight wave guide in line electric light priority encoder, including four micro-ring resonators and three straight wave guides, three straight wave guides and
Two straight wave guides intersect vertically, and constitute a rectangular coordinate system, the 3rd straight wave guide is parallel with the first straight wave guide, the 3rd straight wave guide and
First straight wave guide is non-intersect；The silica-based nanowire micro-loop of one micro-ring resonator is located in the fourth quadrant of the rectangular coordinate system,
And the silica-based nanowire micro-loop is located between the first straight wave guide and the 3rd straight wave guide；The silica-based nanowire of second micro-ring resonator
Micro-loop is located in the third quadrant of the rectangular coordinate system, and the silica-based nanowire micro-loop of other two micro-ring resonator is along parallel to the
The direction of one straight wave guide is located in the second quadrant of the rectangular coordinate system, and towards the second straight wave guide in two micro-ring resonators
Micro-ring resonator silica-based nanowire micro-loop be located between the first straight wave guide and the 3rd straight wave guide.
Electric light priority encoder of the present invention has the following advantages that：
1st, realize that electro-optical encoder replaces traditional electricity encoder using the natural characteristic of light, there is no conventional electrical device
Galvanomagnetic-effect and dead resistance electric capacity influence, it is possible to achieve the information processing of high-speed high capacity.
2nd, using the silicon materials SOI in dielectric substrate, i.e., in SiO2One layer is grown on insulating barrier has certain thickness list
Polycrystal silicon film, the silicon waveguide being made using SOI materials, its sandwich layer is Si（Refractive index is 3.45）, covering is SiO2（Refractive index is
1.44）, the refractive index of covering and sandwich layer is very big, so the waveguide is very strong to the limitation capability of light field so that it bends half
Footpath can be with very little, beneficial to large-scale integrated.
3rd, this line electric light priority encoder of 4 line -2 is only made up of micro-ring resonator and three straight wave guides, only one of which
Intersect, the loss in addition to micro-loop and one are intersected can be ignored, therefore integral device loss very little.
4th, electric light priority encoder of the present invention is made of existing CMOS technology, and device volume is small, low in energy consumption, autgmentability
It is good, it is easy to integrate with other elements.
Brief description of the drawings
Fig. 1 is the structural representation of electric light priority encoder of the present invention.
Fig. 2 is the structural representation of the first micro-ring resonator in electric light priority encoder of the present invention.
Fig. 3 is the structural representation of the second micro-ring resonator in electric light priority encoder of the present invention.
Fig. 4 is the structural representation of the 3rd micro-ring resonator in electric light priority encoder of the present invention.
Fig. 5 is the structural representation of the 4th micro-ring resonator in electric light priority encoder of the present invention.
Fig. 6 is the knot of the electrode of the micro-ring resonator MRR with silicon substrate Thermo-optical modulator in electric light priority encoder of the present invention
Structure schematic diagram.
Fig. 7 is the knot of the electrode of the micro-ring resonator MRR with silicon-based electro-optical modulator in electric light priority encoder of the present invention
Structure schematic diagram.
In figure：1. the first micro-ring resonator, 2. second micro-ring resonators, 3. the 3rd micro-ring resonators, 4. the 4th micro-loops are humorous
Shake device, 5.Si substrates, 6.SiO2Layer, 7. heating electrodes, 8. silicon waveguides；
11. the first input waveguide, 12. first straight-through fiber waveguides, 21. second input waveguides, 22. the 3rd input light waves
Lead, 23. second straight-through fiber waveguides, 24. first download fiber waveguides, 31. the 4th input waveguides, 32. the 5th input waveguides,
Fiber waveguides are downloaded 33. the 3rd straight-through fiber waveguide, 34. second, 41. the 6th input waveguides, 42. the 3rd download fiber waveguides, and 43. the
Four straight-through fiber waveguides, 44. the 4th download fiber waveguide.
Embodiment
The present invention is elaborated with reference to the accompanying drawings and detailed description.
As shown in figure 1, electric light priority encoder of the present invention, including：
Structure the first micro-ring resonator 1 as shown in Figure 2, the first micro-ring resonator 1 includes the first silica-based nanowire micro-loopl 1, the first input waveguide 11 and the first straight-through fiber waveguide 12；First micro-ring resonator 1 carries silicon-based electro-optical modulator or silicon substrate
Thermo-optical modulator；
Structure the second micro-ring resonator 2 as shown in Figure 3, the second micro-ring resonator 2 includes the second silica-based nanowire micro-loopl 2, the second input waveguide 21, the 3rd input waveguide 22, second lead directly to fiber waveguide 23 and first download fiber waveguide 24；Second
Input waveguide 21 is connected with the first straight-through fiber waveguide 12；Second micro-ring resonator 2 carries silicon-based electro-optical modulator or the hot light of silicon substrate
Modulator；
Structure the 3rd micro-ring resonator 3 as shown in Figure 4, the 3rd micro-ring resonator 3 includes the 3rd base nano-wire micro-loopl 3、
4th input waveguide 31, the 5th input waveguide the 32, the 3rd lead directly to fiber waveguide 33 and second and download fiber waveguide 34；4th input
Waveguide 31 is connected with the second straight-through fiber waveguide 23 in the second micro-ring resonator 2；3rd micro-ring resonator 3 is adjusted with silicon-based electro-optic
Device processed or silicon substrate Thermo-optical modulator；
Structure the 4th micro-ring resonator 4 as shown in Figure 5, the 4th micro-ring resonator 4 includes the 4th silica-based nanowire micro-loopl 4, the 6th input waveguide the 41, the 4th lead directly to fiber waveguide the 43, the 3rd download fiber waveguide 42 and the 4th download fiber waveguide 44；6th
Input waveguide 41 is connected with the 3rd straight-through fiber waveguide 33 in the 3rd micro-ring resonator 3；3rd downloads fiber waveguide 42 and second
The 3rd input waveguide 22 in micro-ring resonator 2 is connected；4th downloads the 5th in the micro-ring resonator 3 of fiber waveguide 44 and the 3rd
Input waveguide 32 is connected；4th micro-ring resonator 4 carries silicon-based electro-optical modulator or silicon substrate Thermo-optical modulator；
First input waveguide 11, first lead directly to fiber waveguide 12, the second input waveguide 21, second lead directly to fiber waveguide 23,
4th input waveguide the 31, the 3rd leads directly to fiber waveguide 33, the 6th input waveguide 41 and the 4th straight-through fiber waveguide 43 and is sequentially located at
On first straight wave guide；Second download fiber waveguide 34, the 5th input waveguide 32 and the 4th download fiber waveguide 44 are sequentially located at second
On straight wave guide, second straight wave guide intersects vertically with first straight wave guide, and the 5th input waveguide 32 and the 4th downloads light wave
Lead 44 both sides for being located at the first straight wave guide respectively；First straight wave guide and the second straight wave guide constitute a rectangular coordinate system, the first silicon
Base nano-wire micro-loopl 1With the second silica-based nanowire micro-loopl 2Positioned at the third quadrant of the rectangular coordinate system, and the first silicon-based nano
Line micro-loopl 1Ordinate away from the rectangular coordinate system, the 3rd silica-based nanowire micro-loopl 3Positioned at the rectangular coordinate system second as
Limit, the 4th silica-based nanowire micro-loopl 4Positioned at the fourth quadrant of the rectangular coordinate system；First downloads fiber waveguide 24, the 3rd input light
Waveguide 22 and the 3rd is downloaded fiber waveguide 42 and is sequentially located on the 3rd straight wave guide, and the 3rd straight wave guide is parallel with the first straight wave guide,
3rd straight wave guide and the second straight wave guide are non-intersect, the second silica-based nanowire micro-loopl 2With the 4th silica-based nanowire micro-loopl 4Positioned at
In the region that one straight wave guide and the 3rd straight wave guide are surrounded.First straight wave guide, the second straight wave guide and the 3rd straight wave guide are nano wire
Waveguide.
The electrode of micro-ring resonator MRR with silicon substrate Thermo-optical modulator, as shown in fig. 6, growth has SiO on Si substrates 52Layer
6, SiO2The silicon waveguide 8, SiO that layer 6 is made provided with SOI materials2Heating electrode 7, heating electrode 7 and SiO are additionally provided with layer 62Layer
A cavity is formed between 6, silicon waveguide 8 is located in the cavity；Apply voltage on the lead of heating electrode 7, have electric current and lead to
Cross heating electrode 7 so that heating electrode 7 produces heat, changes the temperature of silicon substrate fiber waveguide by way of heat radiation, so as to change
Become effective group index N of disc waveguideg, then change MRR resonance wavelength, realize dynamic filter.
The electrode of micro-ring resonator MRR with silicon-based electro-optical modulator, as shown in fig. 7, the light wave under such a modulating mechanism
It is p-i-n structure to lead, and the p areas and n areas adulterated at two ends connect high speed electrode, once apply voltage on contact conductor, it will
An electric field by positive pole to negative pole is produced in fiber waveguide, the electric field can cause the drift motion of carrier, silicon substrate is changed with this
Carrier concentration in fiber waveguide, so as to change effective group index N of disc waveguideg, then change MRR resonance wavelength,
Realize dynamic filter.
It can be seen that, the modulation principle of silicon substrate Thermo-optical modulator and silicon-based electro-optical modulator is differed, and silicon substrate Thermo-optical modulator is
Change effective group index of waveguide by the temperature of silicon substrate fiber waveguide is changed.Silicon-based electro-optical modulator is by change track
Carrier concentration in fiber waveguide changes the refractive index of waveguide.Because the time used in heat radiation is far longer than non-equilibrium current-carrying
The life-span of son.So the speed of Electro-optical Modulation is significantly faster than the speed of thermo-optic modulation, but because the reason for being adulterated to waveguide, electric light
The structure of modulator is more more complicated than the structure of Thermo-optical modulator, and manufacturing process is also more complicated.Therefore typically needing the feelings of high speed
Modulated under shape using silicon-based electro-optic, and silicon substrate thermo-optic modulation is being used to the not high occasion of response device rate request.
First silica-based nanowire micro-loopl 1, the second silica-based nanowire micro-loopl 2, the 3rd silica-based nanowire micro-loopl 3With the 4th silicon
Base nano-wire micro-loopl 4Structural parameters it is identical, when unmodulated, four silica-based nanowire micro-loops are all at Same Wavelength
Resonance, the wavelength is the wavelength of input optical signal.
Below by the transmitting procedure of analysis optical signal light in the micro-ring resonator shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 5, letter
Illustrate the operation principle of electric light priority encoder of the present invention：
For the first micro-ring resonator 1 shown in Fig. 2, it is assumed that the first input waveguide of optical signals 11 is inputted, when light letter
Number by coupled zone（First input waveguide 11, first leads directly to the silica-based nanowire micro-loop of fiber waveguide 12 and firstl 1It is closest
A scope）When, optical signal enters the first silica-based nanowire micro-loop by evanscent field couplingl 1In, the first silicon-based nano
Line micro-loopl 1In optical signal can be also coupled into by evanscent field coupling in the first straight-through fiber waveguide 12.It is humorous for meeting
Shake condition（m×l=NgN in × 2p × R, formulagRepresent group index）Optical signal, be coupled to the first straight-through light wave from micro-loop
When leading 12, due to destructive interference caused by the phase difference of two ways of optical signals, can occur delustring in the first straight-through fiber waveguide 12 and show
As；And the light of the condition of resonance is unsatisfactory for because phase difference can not meet destructive interference condition, therefore optical signal is considered as having no
What is influenceed is exported by coupled zone from the first straight-through fiber waveguide 12；
For the second micro-ring resonator 2 shown in Fig. 3, it is assumed that the second input waveguide of optical signals 21 is inputted, when light letter
Number by coupled zone（Second input waveguide 21, second leads directly to the silica-based nanowire micro-loop of fiber waveguide 23 and secondl 2It is closest
A scope）When, optical signal enters the second silica-based nanowire micro-loop by evanscent field couplingl 2In, the second silicon-based nano
Line micro-loopl 2In optical signal the second straight-through fiber waveguide 23 and first can be also coupled into by evanscent field coupling downloads light
In waveguide 24.For meeting condition of resonance（m×l=Ng×2p×R）Optical signal, be coupled to the second straight-through light wave from micro-loop
When leading 23, due to the phase difference of two ways of optical signals, it is not coupled into optical signal and the second input waveguide 21 into the second silicon substrate
Nano wire micro-loopl 2Part cancellation, so can't detect the light wave of resonance wave strong point, correspondence in the second straight-through fiber waveguide 23
The light wave of wavelength can be downloaded in the first download fiber waveguide 24 and export；And the light for being unsatisfactory for condition of resonance is considered as having no shadow
Loud is exported by coupled zone from the second straight-through fiber waveguide 23.When optical signal is inputted from the 3rd input waveguide 22, optical signal
Second silica-based nanowire micro-loop is entered by evanscent field couplingl 2In, the second silica-based nanowire micro-loopl 2In optical signal
The second straight-through fiber waveguide 23 and first can be coupled into by evanscent field coupling to download in fiber waveguide 24.For meeting resonance
Condition（m×l=Ng×2p×R）Optical signal, when being coupled to the first download fiber waveguide 24 from micro-loop, due to two ways of optical signals
Phase difference, be not coupled into the second silica-based nanowire micro-loop in optical signal and the 3rd input waveguide 22l 2Part phase
Disappear, so can't detect the light wave of resonance wave strong point in the first download fiber waveguide 24, the light wave of corresponding wavelength can be downloaded to
Exported in second straight-through fiber waveguide 23；And the light for being unsatisfactory for condition of resonance be considered as having no effect by coupled zone from first
Fiber waveguide 24 is downloaded to export；
For the 3rd micro-ring resonator 3 shown in Fig. 4, it is assumed that the input waveguide 31 of optical signals the 4th is inputted, when light letter
Number by coupled zone（4th input waveguide the 31, the 3rd leads directly to the silica-based nanowire micro-loop of fiber waveguide 33 and the 3rdl 3It is closest
A scope）When, optical signal enters the 3rd silica-based nanowire micro-loop by evanscent field couplingl 3In, the 3rd silicon-based nano
Line micro-loopl 3In optical signal the 3rd straight-through fiber waveguide 33 and second can be also coupled into by evanscent field coupling downloads light
In waveguide 34.For meeting condition of resonance（m×l=Ng×2p×R）Optical signal, be coupled to the 3rd straight-through light wave from micro-loop
When leading 33, due to the phase difference of two ways of optical signals, it is not coupled into optical signal and the 4th input waveguide 31 into the 3rd silicon substrate
Nano wire micro-loopl 3Part cancellation, so can't detect the light wave of resonance wave strong point, correspondence in the 3rd straight-through fiber waveguide 33
The light wave of wavelength can be downloaded in the second download fiber waveguide 34 and export；And the light for being unsatisfactory for condition of resonance is considered as having no shadow
Loud is exported by coupled zone from the 3rd straight-through fiber waveguide 33.And when optical signal is inputted from the 5th input waveguide 32, light letter
Number by evanscent field coupling enter the 3rd silica-based nanowire micro-loopl 3In, the 3rd silica-based nanowire micro-loopl 3In optical signal
Also the 3rd straight-through fiber waveguide 33 and second can be coupled into by evanscent field coupling to download in fiber waveguide 34.It is humorous for meeting
Shake condition（m×l=Ng×2p×R）Optical signal, when being coupled to the second download fiber waveguide 34 from micro-loop, due to two-way light letter
Number phase difference, be not coupled into the 3rd silica-based nanowire micro-loop in optical signal and the 5th input waveguide 32l 3Part phase
Disappear, so can't detect the light wave of resonance wave strong point in the second download fiber waveguide 34, the light wave of corresponding wavelength can be downloaded to
Exported in 3rd straight-through fiber waveguide 33；And the light for being unsatisfactory for condition of resonance be considered as having no effect by coupled zone from second
Fiber waveguide 34 is downloaded to export.
For the 4th micro-ring resonator 4 shown in Fig. 5, it is assumed that the input waveguide 41 of optical signals the 6th is inputted, when light letter
Number by coupled zone（6th input waveguide the 41, the 4th leads directly to the silica-based nanowire micro-loop of fiber waveguide 43 and the 4thl 4It is closest
A scope）When, optical signal enters the 4th silica-based nanowire micro-loop by evanscent field couplingl 4In, the 4th silicon-based nano
Line micro-loopl 4In optical signal can be also coupled into by evanscent field coupling the 3rd download fiber waveguide 42 and the 4th download light
In waveguide 44.Likewise, can completely be downloaded by micro-loop for the light wave for meeting resonance wavelength, due to the 3rd download fiber waveguide 42,
4th downloads fiber waveguide 44 relative to the 4th silica-based nanowire micro-loopl 4It is of equal value, so the 4th silica-based nanowire micro-loopl 4Meeting
The luminous power of input optical signal is divided into two parts and downloads the download straight wave guide of fiber waveguide 44 of fiber waveguide 42 and the 4th from the 3rd respectively
Output；And will have no effect for being unsatisfactory for the light of condition of resonance and exported by coupled zone from the 4th straight-through fiber waveguide 43.
What is be analyzed above is static micro-ring resonator working characteristics, and for summary, what micro-ring resonator can be fixed is certain
A little wavelength（Meet the wavelength of condition of resonance）Signal be downloaded, the signals of some wavelength is led directly to（It is unsatisfactory for the ripple of condition of resonance
It is long）；When this device works, in addition it is also necessary to which the resonance wavelength of micro-ring resonator is dynamically adjustable.By condition of resonance（m×l=N g ×2p× R）Find out, change silica-based nanowire micro-loop radius R and effective group indexN g The resonance wave of silica-based nanowire micro-loop will all be changed
It is long.Here by effective group index of regulation micro-loop waveguideN g To change the resonance wavelength of silica-based nanowire micro-loop.Effective group
Refractive index is relevant with the refractive index for manufacturing silica-based nanowire micro-loop material, and the refractive index for changing the material has two methods：One
It is that material is heated, changes the temperature of material, Refractive Index of Material, i.e., above-mentioned silicon substrate thermo-optic modulation is changed using thermo-optic effect
Device；Two be to inject the refractive index for changing material by carrier using electrooptic effect, i.e., above-mentioned silicon-based electro-optical modulator.Due to
The influence of hot modulating speed thermal convection speed, and electrical modulation speed depends on carrier lifetime, therefore electrical modulation speed, in height
Electrical modulation is used in speed system.
Illustrate the course of work of electric light priority encoder of the present invention by taking hot modulating mechanism as an example：
In continuous-stable optical signal of the first input waveguide 11 input in operation wavelength of the first micro-ring resonator 1.
Then electric signal to be encoded is loaded in the hot modulating mechanism of each micro-ring resonator, when the electric signal is encoded to low level,
I.e. logical zero when, there is no electric current to pass through on the electrode of Thermo-optical modulator, do not produce fuel factor, the refractive index of fiber waveguide is not by shadow
Ring；When the electric signal is encoded to high level, i.e. logical one, under electric field action, there is electric current to lead on the electrode of Thermo-optical modulator
Cross, produce fuel factor, serve the effect of heating to fiber waveguide by heat radiation, then the refractive index of fiber waveguide is become
Change, so as to change the resonance wavelength of micro-ring resonator.
If state of certain micro-ring resonator when modulation signal is low level is logic ' 0 ', now micro-ring resonator
Resonance.State when modulation signal is high level is logic ' 1 ', now micro-ring resonator not resonance；It is assumed that output port has
Represented, represented during signal output that output port is unglazed with logic ' 0 ' with logic ' 1 ' when optical signal is exported；So each micro-loop is humorous
The device that shakes has ' 0 ' and ' 1 ' two states, and for the various states combined, light wave is downloaded in three output ports, i.e., first
Leading the 24, second straight-through fiber waveguide 43 of download fiber waveguide 34 and the 4th has corresponding optical signal output state to correspond to therewith.Note adds
The electric signal logical value being loaded in the hot modulating mechanism of the first micro-ring resonator 1 isI 1 , remember that being carried in the heat of the second micro-ring resonator 2 adjusts
Electric signal logical value in mechanism processed isI 2 , remember the electric signal logical value being carried in the hot modulating mechanism of the 3rd micro-ring resonator 3
ForI 3 , remember that the electric signal logical value being carried in the hot modulating mechanism of the 4th micro-ring resonator 4 isI 4 , the download fiber waveguide 24 of note first
Output optical signal be designated asY 1 , remember that the second output optical signal for downloading fiber waveguide 34 is designated asY 2 , remember the defeated of the 4th straight-through fiber waveguide 43
Optical signals are designated asA。
This priority encoder loading electric signal beI 1 ,I 2 ,I 3 ,I 4 .It is correspondingI 1 It is carried in silica-based nanowire micro-loopl 1 's
On silicon substrate Thermo-optical modulator, I 2 It is carried in silica-based nanowire micro-loopl 2 Silicon substrate Thermo-optical modulator on,I 3 It is carried in silicon-based nano
Line micro-loopl 3 On silicon substrate Thermo-optical modulator,I 4 It is carried in silica-based nanowire micro-loopl 4 Silicon substrate Thermo-optical modulator on.Priority it is suitable
Sequence is determined that the sequence of positions determines that optical signal reaches the sequencing of each micro-loop, and this is suitable by the sequence of positions of each micro-loop
Sequence is more forward, and priority is higher；So as to reach the purpose of according to priority priority encoding.Therefore this priority encoder is corresponding preferential
Level beI 1 >I 2 > I 3 > I 4 。
WhenI 1 During for low level（I 1 =0）, the first micro-ring resonator 1 of correspondence resonance at input optical wavelength, by Fig. 2's
Analysis understands that the wavelength light wave is ' 0 ' in the optical signal that coupled zone can be led directly in fiber waveguide 12 by delustring, i.e., first, and second is micro-
Optical signal power is ' 1 ' in the second input waveguide 21 in ring resonator 2, so no matterI 2 、I 3 、I 4 For which kind of state, output
PortY 1 、Y 2 It can't detect light wave output（Y 1 =Y 2 =0）；
WhenI 1 During for high level（I 1 =1）, correspondingly the first micro-ring resonator 1 is modulated, and its resonance wavelength deviates light wave ripple
It is long, therefore the light wave of input continues to propagate forward, optical signal power is ' 1 ', the second micro-ring resonator 2 in the first straight-through fiber waveguide 12
In the second input waveguide 21 in optical signal power be ' 1 ', whenI 2 During for low level（I 2 =0）, the second micro-ring resonator 2 of correspondence
The resonance at input optical wavelength, from the analysis to accompanying drawing 3, luminous power is ' 0 ' in the second straight-through fiber waveguide 23, and first
It is ' 1 ' to download optical signal power in fiber waveguide 24.Therefore no matterI 3 、I 4 In which kind of state, input light wave all will be completely by second
Micro-ring resonator 2 is downloaded, and byY 1 Port is exported（Y 1 =1,Y 2 =0）.
WhenI 1 、I 2 During for high level（I 1 =1,I 2 =1）, correspondence the first micro-ring resonator 1 and the second micro-ring resonator 2 by
To modulation, micro-ring resonant wavelength departure optical wavelength, therefore the light wave of input continues to propagate forward, the of the 3rd micro-ring resonator 3
Optical signal power is ' 1 ' in four input waveguides 31.WhenI 3 During for low level（I 3 =0）, the 3rd micro-ring resonator 3 of correspondence is in input
Resonance at optical wavelength, from the analysis to accompanying drawing 4, under the power of optical signal is ' 0 ', second in the 3rd straight-through fiber waveguide 33
The power for carrying optical signal in fiber waveguide 34 is ' 1 '.No matterI 4 In which kind of state, input light wave all will be completely humorous by the 3rd micro-loop
The device 3 that shakes download completely, byY 2 Port is exported（Y 1 =0,Y 2 =1）.
WhenI 1 、I 2 、I 3 During for high level（I 1 =1,I 2 =1,I 3 =1）, the first micro-ring resonator 1 of correspondence, the second micro-ring resonator
2 and the 3rd micro-ring resonator 3 it is modulated, the resonance wavelength of three micro-ring resonators deviates optical wavelength, therefore the light of input
Ripple continues to propagate forward, and optical signal power is ' 1 ' in the 6th input waveguide 41 of the 4th micro-ring resonator 4.WhenI 4 For low electricity
Usually（I 4 =0）, the 4th micro-ring resonator 4 of correspondence resonance at input optical wavelength, from the analysis to Fig. 5, input light wave
It will be downloaded by micro-loop, and be divided into two parts and exported simultaneously by the 3rd download download of fiber waveguide 42 and the 4th fiber waveguide 44, under the 3rd
It is ' 1 ' to carry fiber waveguide the 42, the 4th and download the power of optical signal in fiber waveguide 44.Due to the second micro-ring resonator 2 now and
Three micro-ring resonators 3 not resonance, the optical signal inputted from the 3rd input waveguide 22 and the 5th input waveguide 32 will be straight-through
And by first download fiber waveguide 24 and second download fiber waveguide 34 export, finally fromY 1 、Y 2 Port is exported（Y 1 =Y 2 =1）.
IfI 1 、I 2 、I 3 、I 4 When being high level（I 1 =1,I 2 =1,I 3 =1,I 4 =1）, corresponding first micro-ring resonator 1,
Two micro-ring resonators 2, the 3rd micro-ring resonator 3 and the 4th micro-ring resonator 4 are modulated, and input light wave will be directly from straight-through
Fiber waveguide export, finally byAPort is exported（A=1,Y 1 =Y 2 =0）.Now, electric light priority encoder of the present invention does not work.
Described according to working condition above, make the logic true value of the line electric light priority encoder of 4 line of sheet -2 shown in table 1
Table.
The logic true value table of the line electric light priority encoder of 14 line of table -2
As it can be seen from table 1 working asAWhen the logical value of output is 1, electric light priority encoder not in working condition, only whenA
Logical output values be 0 when, fromY 1 、Y 2 The light logic value detected could as Part Number result.Table 1 intuitively illustrates
：Electric light priority encoder of the present invention can realize the priority encoding computing of the line of 4 line -2.The present invention is according to priorityI 1 >I 2 > I 3 > I 4
Rule, by output result byY 1 、Y 2 The light logic value detected is represented.
First input waveguide 11 of the first micro-ring resonator 1 inputs continuous constant in electric light priority encoder of the present invention
The optical signal of fixed wave length；It is humorous higher than the second micro-loop by the first micro-ring resonator 1 according to putting in order for four micro-ring resonators
The device 2 that shakes loads low and high level electricity to be encoded higher than the 3rd micro-ring resonator 3 higher than the priority orders of the 4th micro-ring resonator 4
Signal, electric signal to be encoded acts on each correspondence micro-loop by modulating mechanism；When voltage signal is high level, each micro-loop is humorous
Shake device off resonance at input optical wavelength, optical signal is led directly to；When voltage signal is low level, each micro-ring resonator is in input light wave
Strong point resonance, the optical signal of corresponding wavelength is downloaded by micro-loop.Thus electric light priority encoder of the present invention allows while inputting multiple
Signal, priority encoder is only encoded to a signal of wherein highest priority, so allows for the serious forgiveness of encoder
Greatly improve, job stability is more preferable.Under in download fiber waveguide and the 3rd micro-ring resonator 3 in second micro-ring resonator 2
The optical signal that load fiber waveguide is exported collectively constitutes the final coding result of electric light priority encoder, and the coding result of the output can
Directly input next stage computing or be passed through photodetector and read coding result.
The line electric light priority encoder of 4 line -2 of the invention, by 4 micro-ring resonants being made of the semi-conducting material on insulator
Device MRR and 3 Nanowire Waveguides are realized.Input is that four low and high level electric signals to be encoded and one are in operating wave strong point
Continuous laser signal, the optical signal after to be two-way encode to electric signal of output.Each micro-ring resonator MRR elementary cell is
Micro-ring resonator MRR photoswitches with hot modulating mechanism or electrical modulation mechanism, 4 electric signals to be encoded are to respective MRR's
The mode of action is as follows：When the modulation signal being added in micro-loop is high level, MRR resonant frequency shifts, in input
Off resonance at the wavelength of laser；When the modulation signal being added in micro-loop is low level, MRR is humorous at the wavelength of input laser
Shake, optical signal is downloaded.The process of coding is：The continuous laser of particular job wavelength is inputted in an optical port of device,
4 low and high level electric signals to be encoded act on 4 MRR by the order of priority of determination respectively, in two signal output ports
Just the output coding result corresponding with the electric signal of 4 inputs in the form of light logic, is preferentially compiled so as to complete the line of 4 line -2
Code function.The encoder has specific priority, while when there is multiple input signals, only being carried out to the signal of highest priority
Coding.
This electric light priority encoder overcomes speed in conventional electrical encoder, power consumption, gate delay and competed with emitting
The bottleneck problems such as danger, and small, the low in energy consumption and easy of integration modern integrated circuits premise of device volume is maintained, can be in Photonic Communications
Played a significant role with photon information processing system.
Above-described instantiation, is only to the further detailed of the purpose of the present invention, technical scheme and beneficial effect
Illustrate, it should be noted that the foregoing is only the present invention specific embodiment, be not intended to limit the invention, it is all this
Within the spirit and principle of invention, any modification, equivalent substitution and improvements done etc. should be included in the protection model of the present invention
Within enclosing.
Claims (1)
1. a kind of line electric light priority encoder of new 4 line -2 based on micro-ring resonator, it is characterised in that humorous including the first micro-loop
Shake device（1）, the second micro-ring resonator（2）, the 3rd micro-ring resonator（3）, the 4th micro-ring resonator（4）, the first straight wave guide, second
Straight wave guide and the 3rd straight wave guide, the first straight wave guide and the second straight wave guide intersect vertically, and constitute a rectangular coordinate system, the 3rd straight ripple
Lead parallel with the first straight wave guide, the 3rd straight wave guide and the second straight wave guide are non-intersect；
First micro-ring resonator（1）Including the first silica-based nanowire micro-loop（l 1）, the first input waveguide（11）With the first straight-through light
Waveguide（12）；First silica-based nanowire micro-loop（l 1）Positioned at rectangular coordinate system third quadrant, the first micro-ring resonator（1）With silicon
Base electrooptic modulator or silicon substrate Thermo-optical modulator；First input waveguide（11）With the first straight-through fiber waveguide（12）It is respectively positioned on first
On straight wave guide, and the first input waveguide（11）Away from the second straight wave guide, the first straight-through fiber waveguide（12）With the second micro-ring resonant
Device（2）It is connected；
Second micro-ring resonator（2）Including the second silica-based nanowire micro-loop（l 2）, the second input waveguide（21）, the 3rd input light
Waveguide（22）, the second straight-through fiber waveguide（23）Fiber waveguide is downloaded with first（24）；Second silica-based nanowire micro-loop（l 2）Positioned at straight
Angular coordinate system third quadrant and positioned between the first straight wave guide and the 3rd straight wave guide；Second input waveguide（21）It is straight with second
Thang-kng waveguide（23）It is sequentially located at along towards the direction of the second straight wave guide on the first straight wave guide, the second input waveguide（21）With first
Straight-through fiber waveguide（12）It is connected；First downloads fiber waveguide（24）With the 3rd input waveguide（22）Along the side towards the second straight wave guide
To being sequentially located on the 3rd straight wave guide, second leads directly to fiber waveguide（23）With the 3rd micro-ring resonator（3）It is connected, the 3rd input light wave
Lead（22）With the 4th micro-ring resonator（4）It is connected, the second micro-ring resonator（2）Adjusted with silicon-based electro-optical modulator or the hot light of silicon substrate
Device processed；
3rd micro-ring resonator（3）Including the 3rd silica-based nanowire micro-loop（l 3）, the 4th input waveguide（31）, the 5th input light
Waveguide（32）, the 3rd straight-through fiber waveguide（33）Fiber waveguide is downloaded with second（34）；3rd silica-based nanowire micro-loop（l 3）Positioned at straight
Second quadrant of angular coordinate system, the 4th input waveguide（31）With the 3rd straight-through fiber waveguide（33）Along the side towards the second straight wave guide
To being sequentially located on the first straight wave guide, the 4th input waveguide（31）With the second straight-through fiber waveguide（23）It is connected；5th input light wave
Lead（32）Fiber waveguide is downloaded with second（34）It is sequentially located at along the direction away from the first straight wave guide on the second straight wave guide, the 5th input
Fiber waveguide（32）With the 3rd straight-through fiber waveguide（33）With the 4th micro-ring resonator（4）It is connected, the 3rd micro-ring resonator（3）Carry
Silicon-based electro-optical modulator or silicon substrate Thermo-optical modulator；
4th micro-ring resonator（4）Including the 4th silica-based nanowire micro-loop（l 4）, the 6th input waveguide（41）, the 4th straight-through light
Waveguide（43）, the 3rd download fiber waveguide（42）Fiber waveguide is downloaded with the 4th（44）；4th silica-based nanowire micro-loop（l 4）Positioned at straight
The fourth quadrant of angular coordinate system；6th input waveguide（41）With the 4th straight-through fiber waveguide（43）Along the side away from the second straight wave guide
To being sequentially located on the first straight wave guide；4th downloads fiber waveguide（44）On the second straight wave guide, the 3rd downloads fiber waveguide（42）
On the 3rd straight wave guide；6th input waveguide（41）With the 3rd straight-through fiber waveguide（33）It is connected；3rd downloads fiber waveguide
（42）With the 3rd input waveguide（22）It is connected；4th downloads fiber waveguide（44）With the 5th input waveguide（32）It is connected；4th
Micro-ring resonator（4）With silicon-based electro-optical modulator or silicon substrate Thermo-optical modulator.
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| CN106301381B (en) * | 2015-05-28 | 2019-07-23 | 华为技术有限公司 | Electric light 3-8 decoder |
| CN105071893A (en) * | 2015-07-24 | 2015-11-18 | 天津大学 | Novel large user capacity optical code division multiple access codec |
| CN106291820B (en) * | 2016-10-13 | 2019-01-25 | 兰州大学 | A kind of silicon-based integrated optical mode data exchange unit |
| CN106950646A (en) * | 2017-03-02 | 2017-07-14 | 西安工程大学 | A kind of inside and outside double micro-ring resonator structures |
| CN108519641B (en) * | 2018-05-11 | 2019-07-19 | 兰州大学 | A kind of restructural optical mode conversion device |
| CN109799581B (en) * | 2019-03-11 | 2020-05-08 | 电子科技大学 | Magnetofluid silicon-based micro-ring optical switch |
| CN114609726B (en) * | 2020-12-08 | 2023-12-12 | 军事科学院系统工程研究院网络信息研究所 | Ultra-narrow band filtering method based on harmonic chip integrated cascade filter |
| CN113115136B (en) * | 2021-03-17 | 2024-01-30 | 桂林电子科技大学 | Optical router bridging fault positioning method based on single fault model |
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