CN104956260B - A kind of all-optical logic gate - Google Patents
A kind of all-optical logic gate Download PDFInfo
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- CN104956260B CN104956260B CN201380004328.4A CN201380004328A CN104956260B CN 104956260 B CN104956260 B CN 104956260B CN 201380004328 A CN201380004328 A CN 201380004328A CN 104956260 B CN104956260 B CN 104956260B
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- G—PHYSICS
- G02—OPTICS
- 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 all-optical logic gate, logical operation is realized using the principle of interference of the superposability of the bundling device of light, beam splitter, optically controlled optical switch and light, light, and the phase of light wave is adjusted using the length for adjusting optical waveguide, to meet the requirement of computer, provide a variety of all-optical logic gates, it is integrated that these all-optical logic gates can be conducive to silicon substrate, and realizes simple.All-optical logic gate includes: NAND gate or door, nor gate, same or door and door, NOT gate；Optical logic gate is more advantageous than electric logic gate on power consumption, speed and area, and can directly build various computing function modules using these all-optical logic gates.
Description
Technical field
This application involves technical field of integrated circuits, in particular to a kind of all-optical logic gate.
Background technique
In digital circuit, logic gate is composed structure most basic in digital circuit, has various logic door can
Realize the calculating of various complexity.In general, logic gate includes a variety of with door or door, NOT gate, NAND gate, nor gate etc..
Logic gate in tradition is calculated with electricity to realize, transmitting is electric signal.But with semiconductor technology
Horizontal raising, the directions such as integrated circuit is high towards integrated level, low in energy consumption and speed is fast are developed, so far, integrated circuit
Still follow the rule of Moore's Law.But no matter how integrated circuit develops, the speed that electricity calculates can not infinitely develop
Go down, and the bandwidth that electricity calculates at present is still unable to satisfy the requirement in some fields, the integrated level of integrated circuit can be not yet
Long future reaches capacity.Accordingly, it is desirable to provide a kind of new calculation, to support further mentioning for calculating speed and bandwidth
It is high.
Since light is all advantageous in speed and width, optical oomputing can substitute electricity and calculate to adapt to the need in epoch
It wants.
Current certain scholars, which propose, makes logic gate with optics oriented logical, but its most of scheme is all not all by light
Signal is come what is realized, and substantially electric signal inputs, the form of optical signal output.This structure is needed in the cascade of logic gate
It to be inserted into level-one photoelectric conversion in centre, so that the optical signal of upper level output is converted to electric signal, the input as next stage.
It is more complicated on this spline structure, and be also not and all realized by optical signal.
Therefore, those skilled in the art need to provide a kind of optical logic gate to replace electric logic gate in the prior art and mention
The speed and bandwidth that height calculates.
Summary of the invention
In order to solve the above-mentioned technical problem, the embodiment of the present application provides a kind of all-optical logic gate, to improve the speed calculated
Degree and bandwidth.
In a first aspect, providing a kind of all-optical logic gate, which is NAND gate, including four inputs light sources, three
A beam splitter, five bundling devices and an optically controlled optical switch；The optically controlled optical switch is Gao Youxiao；
Four inputs light source is respectively equal the of the first variables A, the second variable B, light intensity light intensity corresponding with logic 1
1/2 the second equal optical signal of one optical signal and light intensity light intensity corresponding with logic 1；First optical signal and the second optical signal
Initial phase it is identical；The wavelength of four inputs light source is equal；
When the A and B have light intensity, corresponding light intensity is I, I counterlogic 1；When A and B is without light intensity, corresponding light intensity is 0,
Counterlogic 0；
The A inputs the input terminal of the first beam splitter, and the first output end connection described first of first beam splitter is closed
The first input end of beam device；The distance of the first input end of the first output end and the first bundling device of first beam splitter is described defeated
Enter the integral multiple of optical source wavelength；
First optical signal inputs the input terminal of the second beam splitter, and the first output end of second beam splitter connects institute
State the second input terminal of the first bundling device, the distance of the second input terminal of the first output end and the first bundling device of the second beam splitter
For the integral multiple of the input optical source wavelength；
The first input end of second output terminal the second bundling device of connection of second beam splitter, the second of the second beam splitter
The distance of the first input end of output end and the second bundling device is the integral multiple of the input optical source wavelength；
The first output end connection described second of the input terminal of the B input third beam splitter, the third beam splitter is closed
Second input terminal of beam device, the distance of the second input terminal of the first output end and the second bundling device of third beam splitter are described defeated
Enter the integral multiple of optical source wavelength；
The first input end of the second output terminal connection third bundling device of the third beam splitter, the second of third beam splitter
The distance of the first input end of output end and third bundling device is the integral multiple of the input optical source wavelength；
Second input terminal of the second output terminal connection third bundling device of first beam splitter, the second of the first beam splitter
The distance of second input terminal of output end and third bundling device is the odd-multiple of input 1/2 wavelength of light source；
The output end of first bundling device and the output end of the second bundling device be separately connected the 4th bundling device two are defeated
Enter to hold, the distance of the input terminal of the output end of the first bundling device and the 4th bundling device is the integral multiple of the input optical source wavelength；
The distance of the input terminal of the output end of second bundling device and the 4th bundling device is the integral multiple of the input optical source wavelength；
The output end of the third bundling device connects the control terminal of the optically controlled optical switch, the input of the optically controlled optical switch
End connects second optical signal, and the output end of the 4th bundling device connects pentahapto with the output end of the optically controlled optical switch
Two input terminals of beam device, the distance of the input terminal of the output end and the 5th bundling device of the 4th bundling device are the input light source wave
Long integral multiple；The distance of the input terminal of the output end of the optically controlled optical switch and the 5th bundling device is the input optical source wavelength
Integral multiple；Output end of the output end of 5th bundling device as the NAND gate.
The possible implementation of with reference to first aspect the first, the input light source are the sending of Single wavelength single-mode laser
Light beam.
Second aspect provides a kind of all-optical logic gate, which is or door, comprising: two input light sources, one
Bundling device and an optically controlled optical switch；
The optically controlled optical switch is low effective；
Described two input light sources are respectively the first variables A and the second variable B；When the A and B have light intensity, corresponding light
It is by force I, I counterlogic 1；When the A and B is without light intensity, corresponding light intensity is 0, counterlogic 0；
The input terminal of the optically controlled optical switch connects the A；The output end of the optically controlled optical switch connects the bundling device
First input end；
The control terminal of the optically controlled optical switch connects the B；
Second input terminal of the bundling device connects the B；
The output end of the bundling device is as the output end of this or door.
The third aspect provides a kind of all-optical logic gate, which is nor gate, comprising: three inputs light sources, one
A bundling device and an optically controlled optical switch；
The optically controlled optical switch is low effective；
Three inputs light source is respectively that the first variables A, the second variable B and light intensity light intensity corresponding with logic 1 are equal
First optical signal；
When the A and B have light intensity, corresponding light intensity is I, I counterlogic 1；When the A and B is without light intensity, corresponding light intensity
It is 0, counterlogic 0；
The first input end of the bundling device connects the A, and the second input terminal of the bundling device connects first light
Signal；The initial phase of the A and first optical signal is opposite；
The output end of the bundling device connects the input terminal of the optically controlled optical switch；
The control terminal of the optically controlled optical switch connects the B；
Output end of the output end of the optically controlled optical switch as the nor gate.
The third aspect provides a kind of all-optical logic gate, which is same or door, comprising: three inputs light sources, one
A bundling device and an optically controlled optical switch；
The optically controlled optical switch is low effective；
Three light sources be respectively the first variables A, the second variable B and light intensity light intensity corresponding with logic 1 it is equal first
Optical signal；
When the A and B have light intensity, corresponding light intensity is I, I counterlogic 1；When the A and B is without light intensity, corresponding light intensity
It is 0, counterlogic 0；
The initial phase of the A and B is opposite；
Two input terminals of the bundling device are separately connected A and B；
The output end of the bundling device connects the control terminal of the optically controlled optical switch；
The output end of the optically controlled optical switch is as same or door the output end.
Fourth aspect provides a kind of all-optical logic gate, which is same or door, comprising: four inputs light sources, two
A bundling device and an optically controlled optical switch；
The optically controlled optical switch is Gao Youxiao；
Four inputs light source is respectively equal the of the first variables A, the second variable B, light intensity light intensity corresponding with logic 1
One optical signal and the second optical signal；
When the A and B have light intensity, corresponding light intensity is I, I counterlogic 1；When the A and B is without light intensity, corresponding light intensity
It is 0, counterlogic 0；
The initial phase of the A and B is identical, and the initial phase of first optical signal and the initial phase of A are opposite；
First optical signal and A are separately connected two input terminals of the first bundling device；
The output end of first bundling device connects the first input end of the second bundling device, and the of the second bundling device of the B connection
Two input terminals；
The output end of second bundling device connects the control terminal of the optically controlled optical switch；
The input terminal of the optically controlled optical switch connects second optical signal, and the output end of the optically controlled optical switch is used as should
Same or door output end.
5th aspect, provides a kind of all-optical logic gate, which is and door, comprising: two input light sources and one
A optically controlled optical switch；
The optically controlled optical switch is Gao Youxiao；
Described two input light sources are respectively as follows: the first variables A and the second variable B；
When the A and B have light intensity, corresponding light intensity is I, I counterlogic 1；When the A and B is without light intensity, corresponding light intensity
It is 0, counterlogic 0；
The A connects the input terminal of the optically controlled optical switch；
The B connects the control terminal of the optically controlled optical switch；
The output end of the optically controlled optical switch is as the output end with door.
6th aspect, provides a kind of all-optical logic gate, which is NOT gate, comprising: two input light sources and one
A optically controlled optical switch；
The optically controlled optical switch is low effective；
Described two input light source one are the first variables A, another is equal first of light intensity light intensity corresponding with logic 1
Optical signal；
When the A has light intensity, corresponding light intensity is I, I counterlogic 1；When the A is without light intensity, corresponding light intensity is 0, right
Answer logical zero；
The A connects the control terminal of the optically controlled optical switch；
First optical signal connects the input terminal of the optically controlled optical switch；
The output end of the optically controlled optical switch is the output end of the NOT gate.
As can be seen from the above-described embodiment, compared with prior art, the application has the advantages that
It is patrolled using the principle of interference of the superposability of the bundling device of light, beam splitter, optically controlled optical switch and light, light to realize
Operation is collected, and adjusts the phase of light wave using the length (i.e. distance) for adjusting optical waveguide, to meet the requirement of calculating, is mentioned
A variety of all-optical logic gates are supplied, it is integrated that these all-optical logic gates can be conducive to silicon substrate, and realizes simple.It is provided by the present application
All-optical logic gate includes: NAND gate or door, nor gate, same or door and door, NOT gate；Optical logic gate is in power consumption, speed and area
It is upper more advantageous than electric logic gate, and various computing function modules can be directly built using these all-optical logic gates, such as
Small has adder, and big has CPU etc..
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, for those of ordinary skill in the art, is not paying
Under the premise of creative labor, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is beam splitter schematic diagram provided by the present application；
Fig. 2 is the schematic diagram of bundling device provided by the present application；
Fig. 3 a is a kind of schematic diagram of optically controlled optical switch provided by the present application；
Fig. 3 b is the schematic diagram of another optically controlled optical switch provided by the present application；
Fig. 4 be all-optical logic gate provided by the present application be NAND gate when schematic diagram
Fig. 5 a is in Fig. 4 when A is the corresponding diagram that 0, B is 0；
Fig. 5 b is in Fig. 4 when A is the corresponding diagram that 0, B is 1；
Fig. 5 c is in Fig. 4 when A is the corresponding diagram that 1, B is 0；
Fig. 5 d is in Fig. 4 when A is the corresponding diagram that 1, B is 1；
Fig. 6 is that all-optical logic gate provided by the present application is or schematic diagram when door；
Fig. 7 is the schematic diagram that all-optical logic gate provided by the present application is nor gate；
Fig. 8 a is that all-optical logic gate provided by the present application is same or Men Shiyi embodiment schematic diagram；
Fig. 8 b is that all-optical logic gate provided by the present application is same or door another embodiment schematic diagram；
Fig. 9 is that all-optical logic gate provided by the present application is and schematic diagram when door；
Figure 10 be all-optical logic gate provided by the present application be NOT gate when schematic diagram；
Figure 11 is the schematic diagram of optically controlled optical switch provided by the present application.
Specific embodiment
In order to make those skilled in the art can better understand that being introduced first below with technical solution of the present invention is implemented
Several basic conceptions of this field.
Referring to Fig. 1, which is beam splitter schematic diagram.
The optical signal of the input terminal of beam splitter is A, then output end is divided into two optical signals, respectively A1 and A2, A1 and A2
Light intensity be respectively A 1/2, A1 and A2 phase it is identical as A.
Referring to fig. 2, which is bundling device schematic diagram.
As its name suggests, bundling device and beam splitter shown in FIG. 1 are the exactly the opposite device of effect, the optical signal of two inputs
Respectively B1 and B2, then it is two optical signal coherent superpositions of B1 and B2 that the signal of output end, which synthesizes signal a B, B,.
Referring to Fig. 3 a and 3b, which is optically controlled optical switch schematic diagram.
Optically controlled optical switch is the control switch device in optic path, including three ends, respectively input terminal, output end and
Control terminal, when the signal of control terminal is useful signal, the optical signal of input terminal is transmitted to output end output；When the letter of control terminal
Number be invalid signals when, the optical signal of input terminal is not communicated to output end.
The control terminal of optically controlled optical switch be divided into it is high effectively and it is low be effectively Gao Youxiao shown in Fig. 3 a, i.e. the letter of control terminal
Number be 1 when, the optical signal of input terminal is output to output end, on the contrary ground effectively, when the signal for referring to control terminal is 0, input
The optical signal at end is output to output end, this as shown in Figure 3b.
Principle applied by the present invention is described below.
First: the light beam issued using Single wavelength single-mode laser has light intensity to indicate signal 1, unglazed strong representation signal 0.
Second: assuming that the initial phase of the optical signal of input with arrow upwards ↑ indicate, due to the fluctuation transmission characteristic of light,
The phase of the optical signal of input is in a forward direction using wavelength as mechanical periodicity, when the integral multiple that the distance of advance is a wavelength
When, phase remains unchanged, when the distance of advance be half wavelength odd-multiple when, phase become on the contrary, with arrow downwards ↓ table
Show.Herein on the contrary refer to differ 180 degree with initial phase, it is to be appreciated that be also possible to difference 180 degree odd-multiple.
Third: if the amplitude of two-beam is identical, and opposite in phase, since its fluctuation interferes cancellation, superimposed light
Strong is 0；If the amplitude of two-beam is identical, when the distance of two-beam difference is the integral multiple of wavelength, then there is relevant enhancing,
Amplitude is strong 2 times of single beam.
In the embodiment of the present application using the superposability of the bundling device of light, beam splitter, optically controlled optical switch and light, light it is dry
Principle is related to realize logical operation, and adjusts the phase of light wave using the length (i.e. distance) for adjusting optical waveguide, thus full
The requirement calculated enough provides a variety of all-optical logic gates, and it is integrated that these all-optical logic gates can be conducive to silicon substrate, and realizes letter
It is single.It is more advantageous than electric logic gate on power consumption, speed and area, and can directly be built respectively using these all-optical logic gates
Kind of computing function module, for example, it is small have adder, big has CPU etc..
With reference to the accompanying drawings and embodiments, the embodiment of the present application is described in detail.It should be appreciated that described herein
Specific embodiment only to explain the application, is not used to limit the application.
Various all-optical logic gates provided by the embodiments of the present application are introduced one by one with reference to the accompanying drawing.It needs to illustrate
It is that the input light source of each optical logic gate in following embodiment is the light beam that Single wavelength single-mode laser issues.
NAND gate embodiment one:
Referring to fig. 4, the schematic diagram which is all-optical logic gate provided by the present application when being NAND gate.
All-optical logic gate provided in this embodiment is NAND gate, including four input light sources, three beam splitters, five conjunction beams
Device and an optically controlled optical switch；The optically controlled optical switch is Gao Youxiao；
Four inputs light source is respectively equal the of the first variables A, the second variable B, light intensity light intensity corresponding with logic 1
1/2 the second equal optical signal of one optical signal and light intensity light intensity corresponding with logic 1；First optical signal and the second optical signal
Initial phase it is identical；The wavelength of four inputs light source is equal；
As shown, the first optical signal with 1 ↓ indicate, the second optical signal with 1/2 ↓ indicate；First optical signal and second
The arrow of optical signal indicates downwards identical initial phase.
When the A and B have light intensity, corresponding light intensity is I, I counterlogic 1；When the A and B is without light intensity, corresponding light intensity
It is 0, counterlogic 0；
It should be noted that specific intensity can be arranged in light intensity I according to specific needs, in each implementation of the application
It is not specifically limited in example.
The A inputs the input terminal of the first beam splitter, and the first output end connection described first of first beam splitter is closed
The first input end of beam device；The distance of the first input end of the first output end and the first bundling device of first beam splitter is described defeated
Enter the integral multiple of optical source wavelength；
It should be noted that light source will not be changed when the distance of optical waveguide is the integral multiple of the input optical source wavelength
Phase, i.e. phase remains unchanged.
First optical signal inputs the input terminal of the second beam splitter, and the first output end of second beam splitter connects institute
State the second input terminal of the first bundling device, the distance of the second input terminal of the first output end and the first bundling device of the second beam splitter
For the integral multiple of the input optical source wavelength；
The first input end of second output terminal the second bundling device of connection of second beam splitter, the second of the second beam splitter
The distance of the first input end of output end and the second bundling device is the integral multiple of the input optical source wavelength；
The first output end connection described second of the input terminal of the B input third beam splitter, the third beam splitter is closed
Second input terminal of beam device, the distance of the second input terminal of the first output end and the second bundling device of third beam splitter are described defeated
Enter the integral multiple of optical source wavelength；
The first input end of the second output terminal connection third bundling device of the third beam splitter, the second of third beam splitter
The distance of the first input end of output end and third bundling device is the integral multiple of the input optical source wavelength；
Second input terminal of the second output terminal connection third bundling device of first beam splitter, the second of the first beam splitter
The distance of second input terminal of output end and third bundling device is the odd-multiple of input 1/2 wavelength of light source；
When the distance of optical waveguide is the odd-multiple of input 1/2 wavelength of light source, phase will be changed, phase becomes complete
On the contrary, differing 180 degree.
The output end of first bundling device and the output end of the second bundling device be separately connected the 4th bundling device two are defeated
Enter to hold, the distance of the input terminal of the output end of the first bundling device and the 4th bundling device is the integral multiple of the input optical source wavelength；
The distance of the input terminal of the output end of second bundling device and the 4th bundling device is the integral multiple of the input optical source wavelength；
The output end of the third bundling device connects the control terminal of the optically controlled optical switch, the input of the optically controlled optical switch
End connects second optical signal, and the output end of the 4th bundling device connects pentahapto with the output end of the optically controlled optical switch
Two input terminals of beam device, the distance of the input terminal of the output end and the 5th bundling device of the 4th bundling device are the input light source wave
Long integral multiple；The distance of the input terminal of the output end of the optically controlled optical switch and the 5th bundling device is the input optical source wavelength
Integral multiple；Output end of the output end of 5th bundling device as the NAND gate.
Carry out the working principle of analysis chart 4 below with reference to truth table 1.
Table 1
Referring to Fig. 5 a, which is in Fig. 4 when A is the corresponding diagram that 0, B is 0.
It can be seen from Fig. 5a that the path of light is closed first when it is also 0 that the corresponding logic of A, which is the corresponding logic of 0, B,
On beam device, the second beam splitter, the 4th bundling device and the 5th bundling device, the logic of final output is 1.
Referring to Fig. 5 b, which is in Fig. 4 when A is the corresponding diagram that 0, B is 1.
It can be seen from figure 5b that beam is closed first in the path of light when it is 1 that the corresponding logic of A, which is the corresponding logic of 0, B,
Device, the second beam splitter, the second bundling device, third beam splitter, third bundling device, the 4th bundling device, optically controlled optical switch and pentahapto
On beam device, final output is logic 1.
Referring to Fig. 5 c, which is in Fig. 4 when A is the corresponding diagram that 1, B is 0.
From Fig. 5 c as can be seen that when to be the corresponding logic of 1, B be 0 to the corresponding logic of A, the path of light is not in addition to the
Outside propagating on three beam splitters, there is propagation on other devices, the result of final output is logic 1.
Referring to Fig. 5 d, which is in Fig. 4 when A is the corresponding diagram that 1, B is 1.
It can be seen from figure 5d that the path of light is in the first beam splitting when it is 1 that the corresponding logic of A, which is the corresponding logic of 1, B,
Device, the first bundling device, the second beam splitter, the second bundling device, third beam splitter, on third bundling device, the result of final output is
Logical zero.
Above embodiments are NAND gate embodiment provided by the present application, from the above analysis, the NAND gate in the application
It is entirely realized by optical signal, the function of the NAND gate in current electric system can be completed in this way.
Or door embodiment one:
Referring to Fig. 6, which is that all-optical logic gate provided by the present application is or schematic diagram when door.
All-optical logic gate provided in this embodiment is or door；Include: two input light sources, a bundling device and one it is light-operated
Photoswitch；
The optically controlled optical switch is low effective；When i.e. the control terminal of optically controlled optical switch is 0, the input signal of optically controlled optical switch
It is output to output end；
Described two input light sources are respectively the first variables A and the second variable B；First variables A and the second variable B have
When light intensity, corresponding light intensity is I, I counterlogic 1；When first variables A and the second variable B are without light intensity, corresponding light intensity is 0, right
Answer logical zero；
The input terminal of the optically controlled optical switch connects the A；The output end of the optically controlled optical switch connects the bundling device
First input end；
The control terminal of the optically controlled optical switch connects the B；
Second input terminal of the bundling device connects the B；
The output end of the bundling device is as the output end of this or door.
Referring to table 2, table 2 is or the truth table of door.
Table 2
The information for not indicating phase in Fig. 6 is that illustrate can be real to all phases in this way without any arrow
Existing or door function.
Analyze one kind below with reference to Fig. 6, such as A is 0, B when being 1, due to optically controlled optical switch be it is low effectively, B 1
When, which does not turn on, i.e. the output end of optically controlled optical switch does not have a signal, B be 1 be input to one of bundling device it is defeated
Enter end, the output end output of bundling device is 1, to realize or the function of door.
Nor gate embodiment one:
Referring to Fig. 7, which is the schematic diagram that all-optical logic gate provided by the present application is nor gate.
All-optical logic gate provided in this embodiment is nor gate, comprising: three input light sources, a bundling device and a light
Control photoswitch；
The optically controlled optical switch is low effective；
Three inputs light source is respectively that the first variables A, the second variable B and light intensity light intensity corresponding with logic 1 are equal
First optical signal；
When the A and B have light intensity, corresponding light intensity is I, I counterlogic 1；When the A and B is without light intensity, corresponding light intensity
It is 0, counterlogic 0；
The first input end of the bundling device connects the A, and the second input terminal of the bundling device connects first light
Signal；The initial phase of the A and first optical signal is opposite；
The output end of the bundling device connects the input terminal of the optically controlled optical switch；
The control terminal of the optically controlled optical switch connects the B；
Output end of the output end of the optically controlled optical switch as the nor gate.
Referring to table 3, table 3 is the truth table of nor gate.
Table 3
Below with working principle that A is for 1, B is 0 to illustrate nor gate shown in Fig. 7.
Since an input signal A of bundling device is 1, another input signal is also 1, and the phase of two input signals
On the contrary, offseting each other in this way, the signal of bundling device output is 0 for position.When B is 0, optically controlled optical switch conducting, optically controlled optical switch
Input signal 0 is output to output end, therefore the result of final output is logical zero.
Same or door embodiment one:
Referring to Fig. 8 a, which is that all-optical logic gate provided by the present application is same or Men Shiyi embodiment schematic diagram.
All-optical logic gate provided in this embodiment is same or door, comprising: three input light sources, a bundling device and a light
Control photoswitch；
The optically controlled optical switch is low effective；
Three light sources be respectively the first variables A, the second variable B and light intensity light intensity corresponding with logic 1 it is equal first
Optical signal；
When the A and B have light intensity, corresponding light intensity is I, I counterlogic 1；When the A and B is without light intensity, corresponding light intensity
It is 0, counterlogic 0；
The initial phase of the A and B is opposite；
Two input terminals of the bundling device are separately connected A and B；
The output end of the bundling device connects the control terminal of the optically controlled optical switch；
The output end of the optically controlled optical switch is as same or door the output end.
Referring to table 4, table 4 is same or door truth table.
Table 4
It is below that same or door working principle shown in Fig. 8 a is introduced for 1, B is 0 with A.
One input signal of bundling device is A, another input signal is B, since B is 0, so the output of bundling device is believed
Number be A, due to A be 1, and optically controlled optical switch be it is low effectively, therefore, optically controlled optical switch is not turned on, final output result be patrol
Collect 0.The phase of A and B are required in Fig. 8 a, it is desirable that the initial phase of the two input variables is opposite.
Same or door embodiment two:
Be described below this application provides another all-optical logic gate realize same or door.
Referring to Fig. 8 b, which is that all-optical logic gate provided by the present application is same or door another embodiment schematic diagram.
All-optical logic gate provided in this embodiment is same or door, comprising: four input light sources, two bundling devices and a light
Control photoswitch；
The optically controlled optical switch is Gao Youxiao；
Four inputs light source is respectively equal the of the first variables A, the second variable B, light intensity light intensity corresponding with logic 1
One optical signal and the second optical signal；
When the A and B have light intensity, corresponding light intensity is I, I counterlogic 1；When the A and B is without light intensity, corresponding light intensity
It is 0, counterlogic 0；
The initial phase of the A and B is identical, and the initial phase of first optical signal and the initial phase of A are opposite；
First optical signal and A are separately connected two input terminals of the first bundling device；
The output end of first bundling device connects the first input end of the second bundling device, and the of the second bundling device of the B connection
Two input terminals；
The output end of second bundling device connects the control terminal of the optically controlled optical switch；
The input terminal of the optically controlled optical switch connects second optical signal, and the output end of the optically controlled optical switch is used as should
Same or door output end.
Truth table see also table 4, below with A be 1, B be shown in 0 explanatory diagram 8b with or door working principle.Due to A
Be 1, thus two input terminals of the first bundling device be 1 ↑ and 1 ↓, two such input signal offsets each other, the first bundling device
Output is 0, i.e. the second bundling device a input is 0, another input signal B is 0, and the output of such second bundling device is 0,
Since optically controlled optical switch is Gao Youxiao, final output result is logical zero, is consistent with the result of truth table.
With door embodiment one:
Referring to Fig. 9, which is that all-optical logic gate provided by the present application is and schematic diagram when door.
All-optical logic gate provided in this embodiment be and door, comprising: two input light sources and an optically controlled optical switch；
The optically controlled optical switch is Gao Youxiao；
Described two input light sources are respectively as follows: the first variables A and the second variable B；
When the A and B have light intensity, corresponding light intensity is I, I counterlogic 1；When the A and B is without light intensity, corresponding light intensity
It is 0, counterlogic 0；
The A connects the input terminal of the optically controlled optical switch；
The B connects the control terminal of the optically controlled optical switch；
The output end of the optically controlled optical switch is as the output end with door.
It is provided in this embodiment very simple with door, it is only necessary to using an optically controlled optical switch it is achieved that and for A
With the B also not requirement of phase.
Referring to table 5, table 5 is the truth table with door.
Table 5
Below with reference to Fig. 9 with A be introduced for 1, B is 1 it is provided by the present application with door working principle.Due to the light-operated light
Switch is Gao Youxiao, and therefore, when B is 1, optically controlled optical switch conducting, i.e. A is output to output end, therefore exporting is 1, and true
It is consistent to be worth table.
NOT gate embodiment one:
Referring to Figure 10, which is all-optical logic gate provided by the present application when being NOT gate schematic diagram.
All-optical logic gate provided in this embodiment is NOT gate, comprising: two input light sources and an optically controlled optical switch；
The optically controlled optical switch is low effective；
Described two input light source one are the first variables A, another is equal first of light intensity light intensity corresponding with logic 1
Optical signal；
When the A has light intensity, corresponding light intensity is I, I counterlogic 1；When the A is without light intensity, corresponding light intensity is 0, right
Answer logical zero；
The A connects the control terminal of the optically controlled optical switch；
First optical signal connects the input terminal of the optically controlled optical switch；
The output end of the optically controlled optical switch is the output end of the NOT gate.
NOT gate provided in this embodiment only uses an optically controlled optical switch it is achieved that and to A and 1 and not no phase
It is required that.
Referring to table 6, table 6 is the truth table of NOT gate provided by the present application.
Table 6
Introduced so that A is 1 as an example below with reference to Figure 10, due in the embodiment optically controlled optical switch be it is low effectively, when
When A is 1, which is not turned on, therefore exporting is 0, realizes the function of NOT gate, consistent with truth table.
The various logic Men Jun provided in above embodiments is all to be realized by optical logic gate, since optical signal is than electricity
Signal is advantageous in calculating speed and bandwidth, also, low in energy consumption, area is small, by patrolling substantially for above embodiments offer
Collecting door may be implemented the various computing functions in digital circuit.
It is to introduce optical logic gate provided by the embodiments of the present application in above embodiments, is described below in optical logic gate and applies
Optically controlled optical switch a kind of implementation.
Referring to Figure 11, which is the schematic diagram of optically controlled optical switch provided by the present application.
The effect of optically controlled optical switch 400 is exactly the on-off for controlling optical path, and the control terminal of optically controlled optical switch 400 and photocontrol are believed
Number phase it is unrelated.
The input terminal of optically controlled optical switch 400 is generally made of two-beam, wherein a branch of condition of resonance for changing microcavity,
Referred to as pumping light 1000；Another light beam is loaded with signal, referred to as detection light 2000.
The output light of optically controlled optical switch 400 is 5000.
The working principle of optically controlled optical switch 400 is similar with electrooptical switching, but unlike, in optically controlled optical switch 400
The injection mode of carrier generates photo-generated carrier when depending on pumping light irradiation silicon waveguide.Carrier concentration variation is led
Refractive Index of Material and the absorption coefficient variation of cause are finally reflected to be changed for microcavity condition of resonance, so that the light to specific wavelength is real
Now switch.
A kind of all-optical logic gate provided by the present invention is described in detail above, specific implementation used herein
Principle and implementation of the present invention are described for example, and it is of the invention that the above embodiments are only used to help understand
Method and its core concept；At the same time, for those skilled in the art, according to the thought of the present invention, in specific embodiment party
There will be changes in formula and application range, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (2)
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| PCT/CN2013/090036 WO2015089812A1 (en) | 2013-12-20 | 2013-12-20 | All-optical logic gate |
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| CN104956260B true CN104956260B (en) | 2019-04-12 |
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| CN1363855A (en) * | 2002-01-30 | 2002-08-14 | 北京大学 | NOT gate and AND gate for optical logic operation |
| CN101063787A (en) * | 2006-01-18 | 2007-10-31 | 邱富春 | Specifically binary luminous signs and implementation of basic logic doors light path thereof |
| CN101836145A (en) * | 2007-04-12 | 2010-09-15 | 盖尔创尼克斯光学有限公司 | Optical switches and logic gates employing same |
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| US7409131B2 (en) * | 2006-02-14 | 2008-08-05 | Coveytech, Llc | All-optical logic gates using nonlinear elements—claim set V |
| CN101866065A (en) * | 2010-05-28 | 2010-10-20 | 浙江大学 | A phase-change material-assisted self-sustaining optically controlled waveguide optical switch |
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| US4262992A (en) * | 1979-04-18 | 1981-04-21 | The United States Of America As Represented By The Director Of The National Security Agency | Variable integrated optical logic element |
| JPH02127623A (en) * | 1988-11-07 | 1990-05-16 | Nec Corp | Optical element |
| CN1363855A (en) * | 2002-01-30 | 2002-08-14 | 北京大学 | NOT gate and AND gate for optical logic operation |
| CN101063787A (en) * | 2006-01-18 | 2007-10-31 | 邱富春 | Specifically binary luminous signs and implementation of basic logic doors light path thereof |
| CN102226862A (en) * | 2006-02-14 | 2011-10-26 | 科维特克有限公司 | All-optical logic gates using nonlinear elements |
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| WO2015089812A1 (en) | 2015-06-25 |
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