CN105468332B - A kind of instant true random signal generator of data processing postposition type - Google Patents
A kind of instant true random signal generator of data processing postposition type Download PDFInfo
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Abstract
The invention discloses a kind of instant true random signal generator of data processing postposition type, including light source, beam splitter, single-photon detector, electric beam splitter, pulse-modulator, random signal drive device, data acquisition device and data processing module.Transmitted by detecting photon or reflected to generate random signal after beam splitter, and the signal is inputted to the device for needing random signal to regulate and control after modulated, finally selection after the output data progress of the device is handled, the output result under true random signal regulation and control can be obtained.The present invention is based on light quantum effect, and caused random signal can pass through TesRabbit standard testings in tU01, there is the characteristics of cost is low, output signal is ageing high, driven nature is strong, available for application fields such as information encryption, checking quantum nonlocalities.
Description
Technical field
The present invention relates to random signal generation technology, more particularly, to a kind of truly random telecommunications with high-timeliness
Number generating means and system of selection after the data of output is driven to random signal accordingly.
Background technology
Randomizer all has extensive use in many modern science fields --- such as statistical analysis, Numerical-Mode
Plan, algorithm design and information encryption etc..Random generator can be divided into three classes：Pseudorandom number generator, quasi random number generator with
Real random number generator.Wherein pseudo random number is generated with quasi random number by all kinds of random number algorithms, and the former has higher statistics
Randomness, the latter have higher statistics uniformity.Both random numbers, which have, is not required to external hardware support, and formation speed is higher
The advantages of, but because the random sequence of generation is determined by algorithm and initial value, the formation sequence of this two classes random number in principle can be with
Prediction, is not substantially completely random.In terms of information security and information encryption, if two class random numbers pair more than using
Information is encrypted, and attacker can find mathematical law therein in principle, is decoded so as to implement analysis to ciphertext.No
Pseudo random number and quasi random number are same as, the generation of true random number sequence is based on various quantum random processes, such as circuit noise, original
Sub- decay, cosmic ray etc..According to quantum-mechanical related conclusions, when system is in the quantum superposition state of a certain mechanical quantity,
Measurement to the mechanical quantity can make system be collapsed at random in a certain eigenstate of the mechanical quantity, therefore to the mechanical measurement
Result is completely random.So true random number has the advantages of unpredictable.In addition, preferably true random number should also have not
The features such as repeatable, unbiased.
Common real random number generator has following several：
1. based on optical beam-splitter randomizer [T.Jennewein, et al, Rev.Sci.Intrum.71,
1675(2000)].Its general principle is when photon is by 50: 50 beam splitter, and the probability of reflection and transmission is 1/2.By this
Two kinds of events are calculated as 0 and 1 respectively, it is possible to obtain one group of random bit sequence；
2. based on photon arrival time randomizer [M.Wahl et al, Appl.Phys.Lett.98,
171105(2011)].Its general principle be when the adjacent time interval detected twice be much larger than light source coherence time when, it is adjacent
It is completely random to detect the time interval between photon twice.After measured time interval normalization, it can obtain
(0,1] on random number；
3. randomizer [H.Guo the et al, Phys.Rev.E 81,051137 based on laser random phase noise
(2010)].Its general principle is that the phase difference between it can when the time interval between shoot laser is much larger than coherence time
To be considered completely random, therefore make laser (time delay between two-arm is much larger than by the M-Z interferometers of a unequal arm
The laser coherence time) after, exit path completely random of the laser after interference.It is hereby achieved that one group of random bit sequence.
It there is now a variety of commercialized real random number generators to put goods on the market, as the QUANTIS products of IDQ companies (are based on
Optical beam-splitter), the PQRNG150 products (being based on photon arrival time) of PicoQuant companies etc..It is all kinds of random more than
Number generator scheme, after initial random Number Sequence is obtained, for abatement device actual techniques index and theory and technology index not
Symbol etc. influence of the factor to gained information randomness, it is also necessary to the sequence carry out mathematics last handling process so that generation with
Machine sequence obtains preferable statistical property.
In quantum-key distribution [Kyo Inoue, IEEE Journal of Selected Topics in Quantum
Electronics 12-4,888 (2006)], checking quantum nonlocality [SimonEt al, Nature
446,871 (2007)] etc. needs be introduced into real time in the experiment of randomness measurement or modulation, it usually needs truly random electric signal is adjusted
Control laboratory apparatus.Random signal is such as generated using above real random number generator, it is meant that need first to obtain one group initially with
Machine sequence, the random sequence is then inputted into computer etc. and post-processed, gained true random number sequence is converted into electric arteries and veins afterwards
Rush signal output.Because last handling process needs certain time, therefore generation the ageing of random signal can substantially reduce.At this
In, it is ageing low to refer to that (i.e. quantum, which is collapsed, occurs the moment, corresponding three kinds of true random numbers generation described previously from random information generation
Device, the moment, atomic transition outgoing photon moment and laser emitting moment for passing through beam splitter equivalent to photon) arrive random telecommunications
Number output between time interval it is longer.On the one hand, it is ageing caused by random signal in association areas such as quantum-key distributions
It is higher, it is meant that the risk of random information leakage is lower；On the other hand, in experiments such as checking quantum mechanics non-localities
In, when random signal ageing is less than a certain threshold value, so-called non-local leak can be produced, influences the credible of experimental result
Degree.Briefly, verifying the experiment of quantum mechanics non-locality needs by being carried out respectively to two spatially remote particles
Some random measurements.For make to need in experiment without information transmission (meeting locality condition) between two particle to ensure from
Machine information be generated to particle be measured between time interval be less than the random information with needed for light velocity propagation to another particle
Time, it is high ageing that this requires that random signal will have.Such as when two particle is at a distance of 20m, it is desirable between the above-mentioned time
Every less than 67 nanoseconds, and the finishing time of above real random number generator is much larger than the time frame.Except ageing low
Problem, random number is converted into random electric signal output and also needs to Additional signal generator, this not only adds cost, also reduces
Device integrated level.
The content of the invention
(1) to solve the problems, such as
The technical problem to be solved in the present invention is to be produced using existing real random number generator with dynamoelectric signal, it is necessary to volume
Outer Additional signal generator, device integration be not high.And it is generated to the time between random electric signal output from random information
Interval is longer, and random signal generates ageing relatively low.
(2) technical scheme
In order to solve the above technical problems, the present invention proposes that a kind of instant true random signal of data processing postposition type occurs
Device, including a light source, a beam splitter, two single-photon detectors, two electric beam splitters, two signal modulators, one
Individual random signal drive device, a data acquisition device and a data processing module；The light source is used to send photon；Institute
State beam splitter and be used for the photon that sends the light source randomly transmission or reflection；Described two single-photon detectors distinguish position
In on the transmitted light path and reflected light path of the beam splitter, be respectively used to detection from the beam splitter transmit and reflect light
Son, and an electric impulse signal is produced when detecting photon；Described two electric beam splitters are respectively used to two single photon detections
After the electric impulse signal of device output carries out electric beam splitting, the data acquisition device of input all the way after beam splitting, another way is led to respectively
The random signal drive device is inputted after one crossed in two signal modulators；Described two signal modulators are respectively used to
Amplitude modulation(PAM) is carried out to the electric impulse signal of input, to match voltage needed for the random signal drive device；The random letter
Number drive device is used to export operation result and synchronous electric impulse signal under the regulation and control of the electric impulse signal, and by the synchronization
Electric impulse signal inputs the data acquisition device；The data acquisition device is used to related data input data handling mould
Block；The data processing module is used to data are carried out to meet processing so that the random signal good statistics of acquisition of generation with
Machine characteristic.
According to the embodiment of the present invention, the light source is by LED lamp bead, single-mode fiber, fiber coupler and adjustable
Optical attenuator is formed.
According to the embodiment of the present invention, the electric beam splitter exports the equal two-way electricity of short rise time, amplitude
Signal, when single-photon detector exports high level signal, the signal after beam splitting is still logic high.
4th, the instant true random signal generator of data processing postposition type according to claim 1, it is characterised in that
Corresponded between the operation output result and output synchronizing signal of random signal drive device.
5th, the instant true random signal generator of data processing postposition type according to claim 1, it is characterised in that
Data acquisition device is used for the input time for marking each high level signal of each input port.
6th, the instant true random signal generator of data processing postposition type according to claim 1, it is characterised in that
It is T0 to be reflected from photon by beam splitter or be transmitted to reflex circuit or transmit road signal to enter data acquisition device institute through the time,
The corresponding synchronizing signal that photon is exported by the beam splitter to random signal drive device is passed through into data acquisition device
Time is T1, and the random signal corresponding to synchronizing signal is delay, the i.e. random signal at T0-T1 moment.
According to the embodiment of the present invention, the processing that meets of the data processing module includes：To reflex circuit signal
Selection processing is done with transmission road signal, i.e., time interval between reflex circuit signal and transmission road signal two paths of signals is first less than symbol
The signal for closing window width all abandons, then retrieves time interval in signal of going the same way and be less than the signal for meeting the dead time, and abandons
Other signals in addition to caused signal at first, finally obtain true random signal.
According to the present invention embodiment, the data processing module meet processing only retain with selection processing after
Drive device synchronizing signal corresponding to remaining true random signal.
According to the embodiment of the present invention, the beam splitter is made up of polarizer and polarization beam apparatus, and light passes through
When respectively with 50% probability transmission or reflection.
(5) beneficial effect
Of the invention compared with existing real random number generator has the following advantages that：
(1) present invention is modulated signals into after circuit is integrated in randomizer, can directly output pulse amplitude it is adjustable and
Pulse rise time is shorter with dynamoelectric signal, without Additional signal generator.While stronger driven nature is ensured, improve
Device integrated level.
(2) after data processing module is placed in random signal drive device by the present invention, it ensure that signal randomness
Random information generation and random signal are substantially reduced simultaneously by the time delay between use.
(3) laser is substituted as light source using business LED lamp bead, reduces installation cost.
Brief description of the drawings
Fig. 1 is the principle frame of the instant true random signal generator of data processing postposition type provided in an embodiment of the present invention
Figure；
Fig. 2 is the pin access way of the NB3N551 chips under beam splitting pattern in the embodiment of the present invention；
Fig. 3 is the pin access way of the NB3N551 chips under modulating mode in the embodiment of the present invention；
Fig. 4 is the supply voltage and output voltage graph of a relation of NB3N551 chips under modulating mode in the embodiment of the present invention, round
Point is measurement data, and oblique line is the result after linear fit；
Fig. 5 is the specific embodiment line map of the embodiment of the present invention.
Embodiment
To solve the above problems, the present invention proposes a kind of instant true random signal hair with data processing post-modifier
Raw device.The occupation mode of the random signal generator of the present invention is after random signal generation, random signal is inputted a certain
Need in the device (i.e. random signal drive device) using random signal, device output operation knot under random signal driving
Fruit, operation result is screened finally by processing is met, to obtain the plant running result under random signal driving.
The structure of the random signal generator of the present invention is as shown in figure 1, signal generator includes a light source, a light point
Beam device, two single-photon detectors, two electric beam splitters, two signal modulators, a random signal drive device, a number
According to harvester and a data processing module；Light source is used to send photon；Beam splitter is used for the light for sending the light source
Sub randomly transmission or reflection；Two single-photon detectors are stated on the transmitted light path and reflected light path of beam splitter position respectively, point
The photon for transmiting and reflecting from the beam splitter Yong Yu not be detected, and an electric impulse signal is produced when detecting photon；Two
Individual electric beam splitter is respectively used to after carrying out electric beam splitting to the electric impulse signal of two single-photon detector outputs, after beam splitting all the way
The data acquisition device is inputted, another way is driven by inputting the random signal after one in two signal modulators respectively
Dynamic device；Two signal modulators are respectively used to carry out amplitude modulation(PAM) to the electric impulse signal of input, to match the random letter
Number voltage needed for drive device；Random signal drive device is used to export operation result and synchronization under the regulation and control of electric impulse signal
Electric impulse signal, and the synchronous electric impulse signal is inputted into the data acquisition device；Data acquisition device is used for dependency number
According to input data processing module；Data processing module is used to data are carried out to meet processing, so that the random signal of generation obtains
Good statistics stochastic behaviour.
The two-way electric impulse signal of random signal drive device is inputted after two signal modulators, randomness is embodied in
When having electric pulse input, the input path of the electric pulse is random, therefore the electric impulse signal is random signal.
The method of operation of the random signal drive device is：, should when the electric impulse signal input as random signal
Random signal drive device selects a kind of mode operation according to the input path of random signal from two kinds of operational modes, and
The operation result of the random signal drive device and the synchronous electricity synchronous in time with the operation result are exported after a period of time
Pulse signal, the mark that synchronous electric impulse signal exports as the operation result.
It should be noted that the present invention does not want to the concrete function of random signal drive device and carrying out practically step etc.
Ask, therefore operation result here refers to random signal drive device after random signal input, it is postrun through a period of time
Output signal.Basis can determine whether the signal retains after meeting processing afterwards.
Meeting before processing, can exist two-way of following two situations caused by the light field statistical property of LED light source with
The generation moment of mechanical-electronic pulse signal is separated by extremely short so that being difficult to differentiate in time；2. imitated by the afterpulse of single-photon detector
After certain has electric impulse signal generation all the way caused by answering, multiple signals are had within the short period afterwards in generation of going the same way.This two
The pulse signal generated in the case of kind can reduce the randomness of the signal of random signal generator output.By to 6,7 tunnel telecommunications
Number and the synchronous electric impulse signal of random signal drive device carry out meeting processing, the operation in the case of both the above can be removed
As a result.The specific steps for meeting processing will be described hereinafter, and briefly, i.e., 1. have abandoned reflex circuit with transmiting road while detecting
Corresponding pulse signal during photon, 2. after a random signal is obtained, and certain time is interior in generation of going the same way after abandoning it
All signals.The higher random signal of randomness is can obtain after meeting processing.
By random transmission or reflection when the photon that light source is sent passes through beam splitter, then detected in single-photon detector
When transmission road or reflex circuit have photon outgoing a high level pulse signal is exported in corresponding output end.Electric signal is through electric beam splitter point
Shu Hou, all the way input data harvester, the driving that another way needs random signal to regulate and control by being inputted after signal modulator fill
Put.Drive device exports operation result and synchronous electric impulse signal under random signal regulation and control, and the synchronous electric signal is inputted
Data acquisition device.Data acquisition device enters data into data processing module and data is carried out to meet processing.It is last only to retain
With the operation result of the corresponding random signal drive device of remaining synchronization pulse after meeting processing, so as to obtain very with
Operation result under machine signals-modulating.
In Fig. 1,1 corresponding space optical path of line；Line 2,3 corresponding space optical paths, fiber coupler, single-mode fiber, wherein
Single-mode fiber one terminates fiber coupler with reception space light, single-mode fiber other end order photon detector；4 to 13 pairs of line
Induction signal line or signal butt joint.
Wherein, the line 2 is identical with light path corresponding to 3, signal wire corresponding to line 4 and 5,6 and 7,8 and 9,10 and 11
Length is identical.
Wherein, the light source is made up of LED lamp bead, fiber coupler, single-mode fiber and adjustable optical attenuator.LED pair
Quasi-monomode fiber port, a part of optical coupling is made to enter single-mode fiber.The single-mode fiber other end inserts fiber coupler, by emergent light
It is modulated to directional light.Directional light its light intensity after adjustable optical attenuator is attenuated to suitable size；
Wherein, the beam splitter is made up of polarizer and polarization beam apparatus, and wherein polarizer only makes particular polarization
Linearly polarized light transmission, it is inclined for the mutually orthogonal line in polarization direction by the transmission-polarizing light and polarization by reflection light of polarization beam apparatus
Shake light.Regulation polarizer angle makes the transmission of transmission light polarization direction and polarization beam apparatus and reflection direction angle be 45
Degree, light by when can be respectively with 50% probability transmission or reflection；
Wherein, the single-photon detector is two model identical avalanche silicon diode type single-photon detectors, respectively
For detecting transmission road photon and reflex circuit photon, when there is photon to be detected, a standard TTL high level signals are exported；
Wherein, the NB3N551 chips that the signal beam splitter produces for On Semiconductor companies, pin access side
Formula is shown in Fig. 2.Its effect is that input signal is divided into the equal signal of two-way amplitude, while ensures that signal elevating time is shorter.
V during useDDPin access voltage is fixed.It can also use other that there is the high speed electricity beam splitter of similar functions；
Wherein, the NB3N551 chips that the signal modulator produces for On Semiconductor companies, pin access side
Formula is shown in Fig. 3.Its effect is modulated signal amplitude, and specific modulation amplitude size depends on random signal drive device demand.Also may be used
To have the high speed signal modulator of similar functions using other；
Wherein, the amplitude output signal of the NB3N551 chips can be by changing VDDPin accesses voltage swing to adjust,
NB3N551 chips output voltage and V under modulating modeDDPin access supply voltage relation is shown in Fig. 5；
Wherein, the NB3N551 chips input and output voltage graph of a relation is tested under conditions of the load of 50 Ohmic resistances；
Wherein, the random signal drive device is the device for needing random signal to regulate and control, defeated for different random signal
Enter the input signal at end, the device should carry out different processing responses, and corresponding operation result is being exported after certain time-delay；
Wherein, the data acquisition device is that can record the input time that each input port each inputs high point ordinary mail number
Instrument, the ID800 type coincidence counting instrument of IDQ companies production can be used, or other have the data collecting card of similar functions；
Wherein, for the data processing module to meet processing routine, it is to random signal and random signal driving that it, which is acted on,
The synchronizing signal of device carries out meeting processing, remaining random signal is had good statistics randomness, remaining synchronizing signal
Corresponding drive device output is the operation result under true random signal modulation；
Wherein, the single-mode fiber, fiber coupler, beam splitter, single-photon detector operation wavelength should be with LED
The emission wavelength of pearl is corresponding.
, directly will be modulated from technical scheme as can be seen that the present invention is after original random signal is obtained
Random signal input afterwards needs the device that random signal regulates and controls, and is based on again after the output signal of random drive device is obtained
Meet the result of processing and Screening Treatment is carried out to its operation result, while ensure that true random signal good stochastic behaviour,
Random information generation (photon is transmitted or reflected through beam splitter) is shortened to be employed (to input with dynamoelectric signal to random information
Drive device) time.In addition by additional high-speed signal modulator, the present invention can through shorter delay output pulse amplitude
The random signal of tune, therefore all kinds of devices with different driving voltage can be driven.Laser is finally substituted using LED lamp bead
The cost of the invention can be reduced as light source.
With reference to specific embodiment, the present invention is described in further detail.
The principle of the present invention is based on quantum-mechanical measurement theorem.When polarised light passes through polarization beam apparatus, when the polarization of light
When the cross-polarization base angle of direction and polarization beam apparatus is 45 degree, photon can be with 50% probability transmission or reflection, the result
It can not be predicted completely before photon is by polarization beam apparatus.If photon is transmitted and reflected and uses " 0 " and one token respectively, surveying
After multiple photons are measured by the exit path after polarization beam apparatus, one group of unforeseen random bit sequence in advance can be obtained
Row.
Preferably embodiment of the invention is：
LED lamp bead power used is 1W, and spectral centroid wavelength is 940nm, and halfwidth is 50nm or so.
Because LED lamp bead is thermal light source, its light field statistical property sent meets hot optical field distribution, has bunching effect,
Therefore should be by light intensity attenuation to sufficiently small, so that the time interval between most of photon is more than the most I of single-photon detector
Resolving time.Decay is strong and weak to be judged by the counting rate of follow-up two single-photon detectors, and proper attenuation degree is
The counting rate of single-photon detector respectively for it is per second a few to tens of ten thousand, reduce attenuation degree can improve random signal generating rate.
Detection efficient of the single-photon detector used near 940nm is 30% or so, dead time 20ns, and minimum is differentiated
Time is 350ps, and maximum dark counting is 50 per second.After photon incidence single-photon detector, single-photon detector is with one
Determine the random output electric pulse signal of probability, therefore the detection efficient of detector does not have no effect on the random of random signal for 100%
Property.
The output signal of detector is after the NB3N551 chip beam splitting under beam splitting pattern, and output access ID800 types accord with all the way
Total number instrument, the NB3N551 chip inputs that another way output is accessed under modulating mode.The wherein NB3N551 cores of beam splitting pattern
Piece VDDThe access voltage of pin is+5V, it is ensured that during single-photon detector output high level signal, the output signal after beam splitting
Still it is TTL high level；The NB3N551 chips V of modulating modeDDThe access voltage of pin needs depending on random signal drive device
Ask, its amplitude output signal and VDDThe relation of the access voltage swing of pin is shown in Fig. 5.Input signal is driven after random signal is modulated
Dynamic device.Drive device exports operation result and synchronization pulse, wherein synchronization pulse input symbol after certain time-delay
Total number instrument, operation result retain selection processing after wait.The result and synchronization pulse of drive device should be same
Moment exports, or ensures mutually correspond therebetween.
Due to the hot light field property of LED light source, no matter therefore its attenuation degree it is how strong, multi-photon always be present in very short time
The situation of interior while incident beam splitter is spaced, if a part of photon transmits, another part reflection, two-way single-photon detector exists
Understand output signal simultaneously after detecting photon.On the one hand, it is to lead that two paths of signals inputs random signal drive device simultaneously
Cause its operation result inaccurate；On the other hand, it can not judge which kind of bit sequence should be exported when two-way detector responds simultaneously
Row.In addition when multi-photon is simultaneously incident in a short time, may have stronger coherence, therefore these light between these photons
There is certain association in the exit path between son, this can influence the randomness for generating signal.
There is afterpulse effect additionally, due to avalanche diode type single-photon detector, when photon incidence detector and visited
After measuring, it is possible to corresponding signal is just exported after compared with long delay.This can influence the randomness for generating signal, can especially strengthen it
Relevance in time.
To solve the problems, such as two above, it can use to meet to handle and data are screened.It is to meet the basic of processing below
Method：
Meet processing be by analyze sometime in window multichannel input signal situation, with determine retain or lose
Abandon the signal and its corresponding data.Line 2,3 in Fig. 1 is made to correspond to transmission road and reflex circuit, signal wire corresponding to line 6,7 respectively
It is respectively connected to the port 1 and port 2 of coincidence counting instrument.If there is a high level signal port 1, input is event a, and port 2 has one high
Level signal input is event b.It is as shown in the table, when event a or event b occurs, one is opened immediately and meets window, in the window
Intraoral (including window opens the moment) has three kinds of situations.Data processing method shown in following table is taken respectively to these three situations,
And the input signal after close is met in certain time (meeting the dead time) and corresponding data are all abandoned.Wherein accord with
It is 3ns to close window width recommended value, and it is 500ns to meet dead time recommended value.
| Sequence number | 1 | 2 | 3 |
| Event a | Occur | Do not occur | Occur |
| Event b | Occur | Occur | Do not occur |
| Processing mode | Abandon | Retain | Retain |
The simultaneously incident influence of multi-photon can be eliminated using the processing mode of upper table, and by set meet the dead time can be with
The influence that elimination single-photon detector afterpulse effect and multi-photon are concerned with.
If reaching beam splitter from photon, detected afterwards by detector, final output signal inputs into compliance with calculating instrument
Port elapsed time is T0；Beam splitter is reached from photon, is detected afterwards by detector, output signal enters random signal
Drive device, last random signal drive device output synchronizing signal are into compliance with calculating instrument input port elapsed time
T1.The corresponding delay of each random signal is the drive device synchronizing signal of (T1-T0) so in processing is met.Only retain with meeting
The corresponding drive device synchronizing signal of remaining random signal after processing, while abandon corresponding with unreserved synchronizing signal
Drive device operation result, you can obtain the drive device operation result under true random signal regulation and control.Will be after meeting processing
Random signal be converted to random bit, and after being sequentially arranged, the random bit sequence is carried out in TestU01
Rabbit standard testings, it can be detected by every in the standard detection, show that the random signal after meeting processing has
Good statistics stochastic behaviour.
For make the present invention it is ageing sufficiently high, from photon reach beam splitter to signal input random signal drive device
Elapsed time should be as far as possible short.As a specific embodiment, the distance of beam splitter to single-photon detector is 15cm,
Wherein single-mode optical fiber length is 10cm.Pass through length about 1cm between detector and electric beam splitter, electric beam splitter and signal modulator
Signal converting head be connected, between signal modulator and random signal drive device using 10cmBNC signal wires connect, with glazing
The delay that road and circuit introduce is 1.3ns.In addition the input and output delay of single-photon detector is 20ns, NB3N551 output
Input time delay is picosecond magnitude, be can be neglected.Therefore delay adds up to 21.3ns.It can be seen that the present invention has very high timeliness
Property.In addition, in practical operation, the light path between two-way can not possibly be identical, may there is 1 error for arriving 2cm.The mistake
The delay that difference introduces is 33ps to 67ps, be can be ignored.
Claims (9)
1. a kind of instant true random signal generator of data processing postposition type, including a light source, a beam splitter, two
Single-photon detector, two electric beam splitters, two signal modulators, a random signal drive device, a data acquisition dress
Put and a data processing module；
The light source is used to send photon；
The beam splitter is used for the photon that sends the light source randomly transmission or reflection；
Described two single-photon detectors on the transmitted light path and reflected light path of the beam splitter, are respectively used to visit respectively
The photon for transmiting and reflecting from the beam splitter is surveyed, and an electric impulse signal is produced when detecting photon；
Described two electric beam splitters are respectively used to carry out electric beam splitting, beam splitting to the electric impulse signal of two single-photon detector outputs
The data acquisition device of input all the way afterwards, another way respectively by inputted after one in two signal modulators it is described with
Machine signal drive device；
Described two signal modulators are respectively used to carry out amplitude modulation(PAM) to the electric impulse signal of input, to match the random letter
Number voltage needed for drive device；
The random signal drive device is used to export operation result and synchronous electric pulse under the regulation and control of the electric impulse signal
Signal, and the synchronous electric impulse signal is inputted into the data acquisition device；
The data acquisition device is used for related data input data processing module；
The data processing module is used to data are carried out to meet processing so that the random signal good statistics of acquisition of generation with
Machine characteristic, it is described to meet processing and include：Abandon corresponding pulse signal when reflex circuit detects photon simultaneously with transmission road；
To after a random signal, certain time is interior in caused all signals of going the same way after abandoning it.
2. the instant true random signal generator of data processing postposition type according to claim 1, it is characterised in that described
Light source is made up of LED lamp bead, single-mode fiber, fiber coupler and adjustable optical attenuator.
3. the instant true random signal generator of data processing postposition type according to claim 1, it is characterised in that described
The equal two path signal of electric beam splitter output amplitude, when single-photon detector exports high level signal, the letter after beam splitting
Number still it is logic high.
4. the instant true random signal generator of data processing postposition type according to claim 1, it is characterised in that random
Corresponded between the operation output result and output synchronizing signal of signal drive device.
5. the instant true random signal generator of data processing postposition type according to claim 1, it is characterised in that data
Harvester is used for the input time for marking each high level signal of each input port.
6. the instant true random signal generator of data processing postposition type according to claim 1, it is characterised in that from light
It is T0 through the time that son reflects or be transmitted to reflex circuit or transmission road signal into data acquisition device institute by beam splitter, photon
The corresponding synchronizing signal exported by the beam splitter to random signal drive device enters data acquisition device institute through the time
For T1, synchronizing signal to random signal be delay, the i.e. random signal at T0-T1 moment.
7. the instant true random signal generator of data processing postposition type according to claim 1, it is characterised in that described
The processing that meets of data processing module includes：Selection processing is done to reflex circuit signal and transmission road signal, i.e., first believed reflex circuit
Time interval, which is less than, number between transmission road signal two paths of signals meets the signal of window width and all abandons, then retrieves letter of going the same way
Time interval is less than the signal of certain time in number, and abandons other signals in addition to caused signal at first, finally obtains true
Random signal.
8. the instant true random signal generator of data processing postposition type according to claim 1, it is characterised in that described
The processing that meets of data processing module only retains drive device synchronizing signal corresponding with remaining true random signal after selection processing.
9. the instant true random signal generator of data processing postposition type according to claim 1, it is characterised in that described
Beam splitter is made up of polarizer and polarization beam apparatus, light by when respectively with 50% probability transmission or reflection.
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