CN104238233A - Reconfigurable guiding logic device based on multiple-wavelength single-waveguide multiple-ring cascade structure - Google Patents
Reconfigurable guiding logic device based on multiple-wavelength single-waveguide multiple-ring cascade structure Download PDFInfo
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- CN104238233A CN104238233A CN201410474060.7A CN201410474060A CN104238233A CN 104238233 A CN104238233 A CN 104238233A CN 201410474060 A CN201410474060 A CN 201410474060A CN 104238233 A CN104238233 A CN 104238233A
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Abstract
The invention discloses a reconfigurable guiding logic device based on a multiple-wavelength single-waveguide multiple-ring cascade structure, which is particularly applicable to the future optical information processing field. The reconfigurable guiding logic device based on the multiple-wavelength single-waveguide multiple-ring cascade structure is formed by n logic device arithmetic elements and a straight waveguide, wherein each logic arithmetic element is formed by N micro-ring MRRs (Multiple Response Resolvers); each micro-ring MRR is coupled with a wire waveguide. According to the device provided by the invention, the natural characteristic of light is utilized, so that a large amount of information can be processed at high speed; meanwhile, the mature process technology is utilized, so that the device is high in integration level, small in size, low in power consumption, good in expansibility, and convenient to integrate with electric components, so as to be expected to play an important role in optical information processing.
Description
Technical field
The present invention relates to a kind of optical information processing device, particularly a kind of restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure, this device is specially adapted to optical information processing field in the future.
Background technology
Along with the fast development of semiconductor technology, the integrated level of chip or integrated circuit is more and more higher, CPU can obtain the work dominant frequency of GHZ level, but the power consumption that the most serious problems that high primary frequency is brought are unit area circuit sharply rises, meanwhile because the size of integrated component reduces further, electric leakage and heat dissipation problem also cannot well solve, and Moore's Law mythology is constantly challenged.There is some evidence, adopt electronics to do information carrier and can not meet the requirement of people to processing speed faster, and optical communication and optical computing system are using photon as information carrier, wire interconnects, photon hardware is replaced to replace electronic hardware, replace electric computing with optical operation with light network, integrated optical circuit is formed by optical fiber and various optical element, thus the ability that can greatly improve data operation, transmission and storage, cause the attention of increasing scientific research personnel.Restructural oriented logical device is the important component part in optical information processing.A common feature of common logical device is the logical organization proposed for certain logic function, and these structures do not have universality.In order to realize other more complicated logical operations more easily, need a kind of device realizing any one logical function operation.A kind of restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure that the present invention proposes be easy to realize large-scale integrated, power consumption compared with low, volume is little, time delay is little, speed is fast, may play an important role in the high-performance treatments unit in photonic computer in the near future.Up to the present the report that home and abroad has similar functions device is not also seen.
Summary of the invention
The invention provides a kind of restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure, this restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure of the present invention can realize the computing of any one logical function, brings great convenience to the logical operation realizing various complexity.
Restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure of the present invention is made up of n logical device arithmetic element and straight wave guide, and each arithmetic logic unit is wherein made up of N number of micro-ring MRR, and each micro-ring MRR and straight wave guide are coupled.
In restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure of the present invention, each micro-ring MRR silica-based nanowire waveguide fabrication, straight wave guide is Nanowire Waveguides.
In restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure of the present invention, between two adjacent micro-ring resonator MRR, there are interval or the insulant that two micro-interannulars can be stoped to produce hot crosstalk.
The restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure in embodiments of the invention, in micro-ring resonator MRR be the hot modulating mechanism of band or the micro-ring resonator of electrical modulation mechanism.
Device of the present invention adopts the preparation of isolate supports SOI material.
Device of the present invention, the electric signal of computing and the continuous light signal of a multi-wavelength are treated in its input, export be to electric signal logical operation after light signal, wherein the elementary cell of each micro-ring resonator MRR is the micro-ring resonator MRR photoswitch of the hot modulating mechanism of band or electrical modulation mechanism, the process of its computing is: at the continuous laser of an optical port input multi-wavelength of device, treat that the electric signal of computing is carried on MRR according to the state of 1 and 0 with the form of low and high level respectively, the logic operation result corresponding with the electric signal of input is exported with the form of light logic at signal output port, thus complete the computing of any one logical function.
Tool of the present invention has the following advantages:
1, the restructural oriented logical device of silicon-based integrated multi-wavelength list waveguide many rings cascade structure provided by the invention, the natural characteristic that make use of light can realize the information processing of high-speed high capacity; Make use of ripe technology, such that the integrated level of device is high, volume is little, low in energy consumption, favorable expandability, is convenient to electricity component integrated, plays an important role to be desirably in optical information processing.
In the restructural oriented logical device architecture of 2, silicon-based integrated multi-wavelength list waveguide many rings cascade structure provided by the invention, each photoswitch based on micro-ring resonator is independently, and all switches are all concurrent workings simultaneously, this just means that the time delay of each switch can't accumulate, and the result of terminal check exports at optics output terminal with the form of light beam, therefore the processing speed of whole device is relative and electricity device wants fast a lot, therefore have good application prospect in optical information processing.
accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure of the present invention, and port Input is the continuous light signal of multi-wavelength, and be the output terminal of light signal, pending electric signal is carried on micro-ring respectively.
Accompanying drawing 2 is structural representations of arithmetic logic unit, and N number of MRR and Nanowire Waveguides are coupled.Micro-ring of dotted line represents that, when micro-ring loads high level, micro-ring is at operating wave strong point resonance, and when loading low level level, micro-ring is at operating wave strong point not resonance; The micro-ring of solid line represents that, when micro-ring loads high level, micro-ring is at operating wave strong point not resonance, and when loading low level, micro-ring is at operating wave strong point resonance.
Accompanying drawing 3 is the electrode structure schematic diagram of the micro-ring resonator MRR of the hot modulating mechanism of band or electrical modulation mechanism, electrode applies voltage, change the group index of disc waveguide thus the resonance wavelength of change MRR by the carrier concentration produced in heat or change material, realize dynamic filter.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in more detail.
Restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure of the present invention, be made up of n × N number of disc waveguide and a true waveguide, see accompanying drawing 1, its basic structure is the photoswitch based on MRR, only be made up of a kind of MRR of structure, adopt silica-based nanowire waveguide fabrication, make by with the semiconductor material on insulator, each micro-ring resonator MRR and Nanowire Waveguides are coupled.The interval or insulation that can stop and produce hot crosstalk is between the two had between two adjacent micro-ring resonator MRR.In the present invention when N is greater than 1, for the volume reducing device by the multiple straight wave guide of employing and the coupling of MRR phase, and can be coupled to each other with another waveguide of smooth curved between each straight wave guide, form structure as shown in Figure 1.
The MRR structure of the hot modulating mechanism of the band in the embodiment of the present invention or electrical modulation mechanism is shown in Fig. 3.
The input of device of the present invention is the continuous light signal at pending electrical signal sequence and a multi-wavelength place, export be to electric signal computing after light signal, wherein the elementary cell of each micro-ring resonator MRR is the micro-ring resonator MRR photoswitch of the hot modulating mechanism of band or electrical modulation mechanism, the process of its process is: at the continuous laser of an optical port input multi-wavelength of device, treat that the N position binary electrical signal of computing acts on n × N number of MRR, in Fig. 1, micro-ring of dotted line represents when micro-ring loads high level, micro-ring is at operating wave strong point resonance, when loading low level level, micro-ring is at operating wave strong point not resonance, the micro-ring of solid line represents when micro-ring loads high level, micro-ring is at operating wave strong point not resonance, when loading low level, micro-ring is at operating wave strong point resonance, just export the logic operation result of the electric signal inputted with N position at signal output port with the form of light logic, thus realize the computing of any one logical function.
Have N number of treat computing electric signal input and the continuous light of a multi-wavelength input, output is the light signal that can transmit the information processing directly entering next stage in a fiber after carrying out computing to N number of electrical signal sequence.Micro-ring of dotted line represents that, when micro-ring loads high level, micro-ring is at operating wave strong point resonance, and when loading low level level, micro-ring is at operating wave strong point not resonance; The micro-ring of solid line represents that, when micro-ring loads high level, micro-ring is at operating wave strong point not resonance, and when loading low level, micro-ring is at operating wave strong point resonance.The operation result of any one logical function can be obtained at the output terminal of light signal.
MRR structure of the present invention, can adopt SOI, SIN, the material realization of III-V race.The scheme of optimization of the present invention realizes based on SOI material, and its outstanding advantage is; The CMOS technology technology that technology utilization is ready-made, makes device volume little, low in energy consumption, and favorable expandability, is convenient to electricity component integrated.
The structural relation of feature performance benefit of the present invention and its material properties of adopting and device is close.
In material: what the present invention adopted is silicon (Silicon-On-Insulator, SOI) material in dielectric substrate.SOI refers at SiO
2insulation course grows one deck and have certain thickness monocrystalline silicon thin film, the CMOS technology of its technique and present microelectronic widespread use is compatible.Utilize the silicon waveguide that SOI material is made, its sandwich layer is Si(refractive index is 3.45), covering is SiO
2(refractive index is 1.44), the refringence of such covering and sandwich layer is very large, so this waveguide is forced its bending radius can be very little to the limitation capability of light field very much.
In configuration aspects: elementary cell of the present invention is the micro-ring resonator based on silica-based nanowire waveguide, it is a kind of diverse in function, superior performance, the integrated optical element be widely studied in recent years.Radius due to disc waveguide can be as small as 1.5 microns, thus makes the area of device very little, can produce multiple device on one chip.Conventional waveguide device is (as LiNbO
3) bending radius generally at millimeter even centimetres, chip occupying area is comparatively large, and chip piece can only put next device usually.Device architecture of the present invention closely, can realize device High Density Integration, reduces loss during discrete device coupling, reduces the packaging cost of device simultaneously.
Below by the transmitting procedure of analysis light signal in the MRR shown in Fig. 2, its principle of work of brief description:
The form that the expression formula of any one logical operation can turn to, wherein represents ' with ' computing (such as :) of n operand respectively.The principle of design device architecture realizes first respectively, then realizes thus just achieve the computing of any logical function.
λ
1, λ
2represent the resonance wavelength position of MRR1 and MRR2 respectively.Operation wavelength is selected in λ
1place, illustrates its principle of work with the electrooptical modulation scheme of plasma dispersion effect.Wavelength is operation wavelength λ
1monochromatic continuous laser is input to the input end of Fig. 2.When MRR2 when adding high level its resonance wavelength from λ
2move on to λ
1(add high level, carrier injection waveguide section, the refractive index of waveguide diminishes, resonance wavelength is from long wave to short wave mobile), by this definition, for MRR1, electric signal is 0 optical signal is 0, electric signal is 1 optical signal is 1, for MRR2, electric signal is 0 optical signal is 1, electric signal is 1 optical signal is 0. so can obtain logical operation at straight-through end (Through):, represent and be carried in MRR1, number to be operated on MRR2, the micro-ring resonator of dotted line represents when being carried in the voltage on micro-ring and being high level (number to be operated is 1), micro-ring resonator in operation wavelength everywhere in resonant condition, the micro-ring resonator of solid line represents when being carried in the voltage on micro-ring and being low level (number to be operated is 0), micro-ring resonator in operation wavelength everywhere in resonant condition.According to similar definition, the straight-through end of Fig. 2 can obtain logical operation, wherein represents respectively and is carried in MRR1, MRR2, MRR3 ... MRRn treats the operand of computing.
Figure 3 shows that the hot modulating mechanism of MRR, power up the heating of rear metal electrode, thermal field conducts to waveguide, the temperature of waveguide is changed, the group index N of disc waveguide
gchange, the resonance wavelength of MRR changes thereupon.
Fig. 1 is the structural representation of the restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure.Inputting at optical signal input Input is multi-wavelength continuous light signal (CW), and micro-ring of dotted line represents that, when micro-ring loads high level, micro-ring is at operating wave strong point resonance, and when loading low level level, micro-ring is at operating wave strong point not resonance; The micro-ring of solid line represents that, when micro-ring loads high level, micro-ring is at operating wave strong point not resonance, and when loading low level, micro-ring is at operating wave strong point resonance.This structure is made up of a Luciola substriata and n arithmetic logic unit, and each arithmetic element is made up of N number of micro-ring, and such total is total micro-ring always.Principle of work: the light signal of multi-wavelength is input to input end, treats that the electric signal of computing is carried on corresponding micro-ring respectively, as figure can obtain y at the straight-through end position of arithmetic element #1
1, can y be obtained at the straight-through end position of arithmetic element #2
1+ y
2, cascade like this is gone down, and can obtain at the straight-through end Y of arithmetic element #n, namely this structure can complete the computing of any one logical function.
It should be noted that: in device operation, N number of electrical signal to be verified in time must precise synchronization.In High Speed System, need to reach synchronous requirement by special electrode design, special placement-and-routing and EMC analysis.
Above-described specific embodiment; it is only the further description to object of the present invention, technical scheme and beneficial effect; institute it should be noted and the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all; any amendment of making, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
The silicon-based integrated restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure of the present invention, treats that the logical value of the electric signal of computing wants Accurate align in time, each logical value precise synchronization in time.
The MRR of the hot modulating mechanism of band of the present invention or electrical modulation mechanism, can adopt heat modulation in signal transmission rate (below million magnitudes) less demanding situation, needs to adopt electrical modulation in high speed (lucky magnitude) transmission system.
In such scheme, should realize electric signal based on restructural oriented logical device of multi-wavelength list waveguide many rings cascade structure to the calculating process of light signal is: the continuous laser of a port input multi-wavelength of device, treats that the electric signal of computing is carried on micro-ring of correspondence respectively.As Fig. 1 can obtain y at the straight-through end position of arithmetic element #1
1, can y be obtained at the straight-through end position of arithmetic element #2
1+ y
2, cascade like this is gone down, and can obtain y at the straight-through end Y of arithmetic element #n
1+ y
2+ ... + y
n, namely this structure can complete the computing of any one logical function, and this is also purpose of the present invention.
In the present invention, treat that the electrical signal sequence (being added in the electric signal on micro-ring) of computing needs Accurate align in time, i.e. precise synchronization in time.Under high-speed operation mode, need analyses and simulations electrode being carried out to special design and electromagnetic compatibility aspect.
In the present invention, described light signal can transmit in a fiber and directly enter next stage and process.
Claims (5)
1. based on the restructural oriented logical device of multi-wavelength list waveguide many rings cascade structure, it is characterized in that being made up of n logical device arithmetic element and a straight wave guide, each arithmetic logic unit is wherein made up of N number of micro-ring MRR, and each micro-ring MRR and straight wave guide are coupled.
2. the restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure according to claim 1, it is characterized in that micro-ring MRR silica-based nanowire waveguide fabrication, straight wave guide is Nanowire Waveguides.
3. the restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure according to claim 2, is characterized in that having interval or the insulant that two micro-interannulars can be stoped to produce hot crosstalk between two adjacent micro-ring resonator MRR.
4., according to the arbitrary restructural oriented logical device based on multi-wavelength list waveguide many rings cascade structure described in claims 1 to 3, it is characterized in that micro-ring resonator MRR is the micro-ring resonator of the hot modulating mechanism of band or electrical modulation mechanism.
5. the preparation method of the device described in Claims 1-4, is characterized in that adopting the preparation of isolate supports SOI material.
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Cited By (6)
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| CN109491175A (en) * | 2019-01-15 | 2019-03-19 | 兰州大学 | A kind of restructural oriented logical device based on mode multiplexing |
| CN110749956A (en) * | 2019-11-04 | 2020-02-04 | 兰州大学 | Reconfigurable optical mode converter compatible with wavelength division multiplexing |
| CN113904726A (en) * | 2021-11-15 | 2022-01-07 | 东南大学 | Large time delay difference dispersion waveguide structure |
| CN114019611A (en) * | 2021-11-16 | 2022-02-08 | 北京邮电大学 | Wavelength selectivity optical delay line based on micro-ring resonator |
| US11294131B2 (en) | 2020-03-11 | 2022-04-05 | Hewlett Packard Enterprise Development Lp | Waveguide shuffle blocks for optical system connectivity |
| CN114815331A (en) * | 2022-04-22 | 2022-07-29 | 中国电子科技集团公司第五十四研究所 | Optical full adder guide logic device applied to microwave photons |
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Cited By (6)
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| CN114019611A (en) * | 2021-11-16 | 2022-02-08 | 北京邮电大学 | Wavelength selectivity optical delay line based on micro-ring resonator |
| CN114815331A (en) * | 2022-04-22 | 2022-07-29 | 中国电子科技集团公司第五十四研究所 | Optical full adder guide logic device applied to microwave photons |
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Application publication date: 20141224 |