CN108306678A - A kind of single-photon source single photon output system and control method - Google Patents
A kind of single-photon source single photon output system and control method Download PDFInfo
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- CN108306678A CN108306678A CN201711464014.9A CN201711464014A CN108306678A CN 108306678 A CN108306678 A CN 108306678A CN 201711464014 A CN201711464014 A CN 201711464014A CN 108306678 A CN108306678 A CN 108306678A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
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- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/112—Line-of-sight transmission over an extended range
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- H04B10/503—Laser transmitters
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- H04B10/5053—Laser transmitters using external modulation using a parallel, i.e. shunt, combination of modulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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Abstract
The present invention relates to a kind of single-photon source single photon output system and control methods, the system comprises sequentially connected serial/parallel conversion unit, single photon set of source, the photoswitches of N × 1, and the controller being bi-directionally connected with the serial/parallel conversion unit, single photon set of source and the photoswitches of N × 1；Input terminal high speed serialization electric impulse signal is converted to the parallel electric impulse signal in the roads N of low rate by serial/parallel conversion unit by technical scheme of the present invention, N number of parallel optical signal is respectively converted by the single-photon source unit of N number of same performance, using the photoswitches of N × 1, realize the parallel/serial transformation of optical signal, export high-speed single photon signal, to solve the restricted problem of single-photon source device generation single photon rate, shorten the minimum time interval between single photon, single photon output speed is improved, the restricted problem of the technology and economy of high-speed single photon source device is overcome.
Description
Technical field
The present invention relates to quantum physics application fields, especially quantum information technology engineer application field, and in particular to one
Kind single-photon source single photon output system and control method.
Background technology
Single-photon source technology has irreplaceable work in fields such as quantum information technology, physics, chemistry, biology and astronomy
With；It is especially measured in quantum information field, such as quantum communications, quantum calculation, quantum, single-photon source technology has become the neck
Indispensable one of core key technology is developed in domain；Since quantum information technology utilizes single elementary particle such as photon etc. to letter
Breath is encoded and is manipulated, therefore extremely harsh performance requirement is proposed to single-photon source, such as single photon output speed, monochromatic light
Minimum time interval etc. between the maximum output frequency of subpulse, single photon, far beyond the performance achieved by existing device
Index；In order to meet these growing application demands, this field researcher is constantly improving traditional single-photon source；
The function of single-photon source device is the conversion for completing electric signal to optical signal, is believed as triggering by the electric signal stream of pulses received
Number, and generate single photon pulses stream；The output single photon pulses flow velocity rate of single-photon source device, by formation efficiency etc. it is a variety of because
The restriction of element；Not only price is high but also is limited by the block of abroad high-tech for the single-photon source of height output rate, in order to solve
The restricted problem of single-photon source device generation single photon rate.
Therefore, it is urgent to provide a kind of single-photon source single photon output systems that can effectively improve raising single photon output speed
And control method.
Invention content
A kind of single-photon source single photon output system of present invention offer and control method, the purpose is to use N number of phase same sex
The single-photon source unit concurrent working of energy converts electrical signals to N number of parallel optical signal, and the photoswitches of N × 1 is utilized to realize that light is believed
Number parallel serial conversion, the single photon output speed of single-photon source is effectively improved under the premise of the efficiency for not reducing each single-photon source
Rate.
The purpose of the present invention is what is realized using following technical proposals：
A kind of single-photon source single photon output system, it is improved in that the system comprises：Serial/parallel conversion unit
(1), single photon set of source (2), the photoswitches of N × 1 (3) and controller (4)；
The serial/parallel conversion unit (1), single photon set of source (2), the photoswitches of N × 1 (3) are sequentially connected；
The controller (4) respectively with serial/parallel conversion unit (1), single photon set of source (2) and the photoswitches of N × 1 (3)
It is bi-directionally connected；
The same type electricity that serial/parallel conversion unit (1) passes through N root same performance equal lengths with single photon set of source (2)
Cable connects, and single photon set of source (2) is connected with the photoswitches of N × 1 (3) by the same type optical fiber of N root same performance equal lengths
It connects.
Preferably, the serial/parallel conversion unit (1), for 1 road high speed serialization electric signal of input terminal to be converted to low bit rate
The parallel electric signal in the roads N of rate；
The serial/parallel conversion unit (1) includes the serial/parallel conversion unit of 1 × N electric switches or first in first out；
1 × N electric switches are revolving MEMS (MEMS, Micro-Electro-Mechanical
System) 1 × N electric switches.
Preferably, the single photon set of source (2), for by the single-photon source unit of N number of same performance by the roads N simultaneously
Capable electric signal is converted to the parallel optical signal in the roads N；
The single photon set of source (2) is made of the single-photon source unit parallel arranged of N number of same performance, and N takes just whole
Number；
The single-photon source unit is independent single-photon source or single-photon source array device；
The single-photon source includes parametric down conversion single-photon source, quantum dot single-photon source, nano-antenna single-photon source；
The single-photon source array includes parametric down conversion single-photon source array device, quantum dot single-photon source array device
Part, nano-antenna single-photon source array device；
Single-photon source array device is formed and is packaged together by identical single-photon source unit parallel arranged.
Preferably, the photoswitches of the N × 1 (3), for the parallel optical signal in the roads N to be converted to the serial optical signal in 1 road,
And it is exported in output end；
The photoswitches of the N × 1 (3) include mechanical optical switch, waveguide optical switch and MEMS (MEMS, Micro-
Electro-Mechanical System) photoswitch.
Preferably, the controller (4), for control the serial/parallel conversion unit (1), single photon set of source (2) and
The working frequency of the photoswitches of N × 1 (3) is synchronous, the working time is synchronous synchronous with working condition；The controller (4) is serial/parallel turn
It changes unit (1), single photon set of source (2) and the photoswitches of N × 1 (3) and clock signal and control signal is provided, and monitor its alarm
Information；
The controller (4) includes onboard clock and external interface；
The clock source of the onboard clock includes constant-temperature crystal oscillator, rubidium atomic clock, cesium-beam atomic clock；
The external interface includes IRIG-B DC codes interface clock signal, trigger pulse input/output interface, RS232 pipes
Manage interface, USB interface；
Controller (4) extraction enters the frequency and phase in the input electrical signal of serial/parallel conversion unit (1) input terminal
Bit synchronization information.
The control method of single-photon source single photon output system as described in any one of the above embodiments, it is improved in that institute
The method of stating includes：
1 road high speed serialization electric signal is inputted, serial/parallel conversion unit (1) is converted to 1 road high speed serialization electric signal of input
The parallel electric signal in the roads N of low bit rate rate；
Single photon set of source (2) is parallel by the roads N respectively by the single-photon source unit concurrent working of N number of same performance
Electric signal is converted to the parallel optical signal in the roads N；
The parallel optical signal in the roads N is converted into the serial optical signal in 1 road using the photoswitches of N × 1 (3), and defeated in output end
Go out；
Wherein, the input terminal of single-photon source unit x is electric by the xth road of cable connection serial/parallel conversion unit (1) output end
Signal, the output end of single-photon source unit x by the optical fiber connection photoswitches of N × 1 (3) input terminal xth road optical signal, 1≤x≤
N。
Preferably, 1 road high speed serialization electric signal of input is converted to the N of low bit rate rate by the serial/parallel conversion unit (1)
The parallel electric signal in road, including：
The serial/parallel conversion unit (1) is controlled the serial/parallel conversion for completing input electrical signal by controller (4), and 1 tunnel is gone here and there
Capable electric signal, is converted to the parallel electric signal in the roads N, and N takes positive integer；
The serial/parallel conversion unit (1) is controlled by controller (4), and periodically arriving N with 1, polling mode works at equal intervals,
Each cycle corresponds to N number of serial electric pulse in serial electric signal；
The serial/parallel conversion unit (1) is controlled by controller (4), and turn-on time is between the time by 1 electric pulse
Every each electric pulse passes through serial/parallel conversion unit (1) at midpoint of its conduction period or so；
Corresponding N × 1 photoswitch (3) input terminal of xth road electric signal association of serial/parallel conversion unit (1) output end
Xth road optical signal, and in each work period, the input terminal of the single-photon source unit x in single photon set of source (2),
Output end corresponds to the xth road of the xth road electric signal of serial/parallel conversion unit (1) output end, the photoswitches of N × 1 (3) input terminal respectively
Optical signal, wherein 1≤x≤N.
Preferably, the single photon set of source (2) is distinguished by the single-photon source unit concurrent working of N number of same performance
The parallel electric signal in the roads N is converted into the parallel optical signal in the roads N, including：
The single photon set of source (2) is controlled by controller (4), ensures N number of monochromatic light in single photon set of source (2)
Working frequency synchronization between component unit, working time are synchronous synchronous with working condition holding.
Preferably, described that the parallel optical signal in the roads N is converted into the serial optical signal in 1 road using the photoswitches of N × 1 (3), it wraps
It includes：
The photoswitches of the N × 1 (3) control (4) by controller, periodically with 1 to N polling mode work at equal intervals, often
Period corresponds to N number of serial light pulse in serial optical signal；
The photoswitches of the N × 1 (3) by controller control (4), keep its working time, working frequency and working condition with
The working time of the serial/parallel conversion unit (1), working frequency are synchronous with working condition, by the parallel input optical signal in the roads N,
The serial optical signal in 1 road is converted to, N takes positive integer；
The 1st in the single photon set of source (2) exports the roads N parallel light letter to n-th single-photon source unit is total
Number, the roads optical signal Zhong Mei that the roads N are parallel in each cycle correspond to 1 light pulse, and each light pulse is between photoswitch turn-on time
Every midpoint or so by the photoswitches of N × 1 (3), it is serial that the parallel optical signal in the roads N by the photoswitches of N × 1 (3) is converted to 1 road
Optical signal output.
Preferably, controller (4) the control serial/parallel conversion unit (1), single photon set of source (2) and the light of N × 1 are opened
The function of closing (3) executes；
The controller (4) is that serial/parallel conversion unit (1), single photon set of source (2) and the photoswitches of N × 1 (3) provide
Clock signal and control signal, and monitor its warning information；
The controller (4) ensures that work and photoswitch (3) periods of N × 1 is periodically polled in serial/parallel conversion unit (1)
Property poll work it is interrelated, realize one-to-one relationship, the xth road electric signal association of serial/parallel conversion unit (1) output end
The xth road optical signal of corresponding N × 1 photoswitch (3) input terminal, and in each work period, in single photon set of source (2)
Single-photon source unit x input, output end correspond to respectively the xth road electric signal of serial/parallel conversion unit (1) output end, N ×
The xth road optical signal of 1 photoswitch (3) input terminal, wherein 1≤x≤N；
Wherein, clock sync signal includes that working frequency synchronizing signal, operating phase synchronizing signal are synchronous with the working time
Signal, warning information are fault warning information.
The present invention also has the advantages that compared with prior art：
1. the technical solution adopted by the present invention is converted input terminal high speed serialization electric impulse signal by serial/parallel conversion unit
For the parallel electric impulse signal in the roads N of low bit rate rate, converted respectively by the single-photon source unit of N number of same model, same performance
The parallel/serial transformation of optical signal is realized using the photoswitches of N × 1, export high-speed single photon light pulse for N number of parallel optical signal
Signal；In the case where formation efficiency does not reduce, it can normally export the light pulse that N times of single single-photon source device allows and believe
The single photon of number flow velocity rate has achieved the effect that the output bit rate for improving single-photon source system.
2. the technical solution adopted by the present invention does not reduce each list by the single-photon source concurrent working of N number of same performance
The efficiency of photon source, come shorten whole system single photon minimum time interval, and minimum time interval do not ensure for 0 it is single
The minimum time interval of photon, the output single photon of whole system is N/mono- of single single-photon source, and it is single to increase output
The closeness of photon；Integrated innovation optimizes system performance index.
3. the technical solution adopted by the present invention does not reduce each list by the single-photon source concurrent working of N number of same performance
The maximum output frequency of the efficiency of photon source, the single photon pulses of whole system has been increased to N times of single single-photon source.
4. the technical solution adopted by the present invention replaces the costliness of 1 high speed single by the cheap single-photon source of N number of low rate
Photon source, solving the single-photon source of height output rate, not only price is high but also by the restricted problem that abroad high-tech is blocked,
With excellent economy and practicability.
5. the technical solution adopted by the present invention is worked by the single-photon source device parallel of N number of same performance, whole to improve
The output speed of the single photon of a system improves the technical indicator of single-photon source, is multi-channel single photon source device and monochromatic light
Component array provides a kind of application scenarios, and then from the angle of application, promotes the development of integreted phontonics technology, promotes photon collection
At the engineer application of circuit (Photonic Integrated Circuit, PIC).
6. the technical solution adopted by the present invention is worked by the single-photon source device parallel of N number of same performance, whole to improve
The output speed of the single photon of a system improves the technical indicator of single-photon source, promotes Technique on Quantum Communication level, and then meet
The growing demand of quantum communications.Because three core technologies in quantum communications are single-photon source technology, quantum volume respectively
Code and transmission technology and singl e photon detection technology.
7. the technical solution adopted by the present invention improves the output speed of single photon, the technology for improving single-photon source refers to
Mark can promote the speed and precision for promoting Quantum logic gates, in quantum calculation (quantum computation) and quantum meter
The field calculation machine (quantum computer) has positive facilitation.
8. the technical solution adopted by the present invention improves the output speed of single photon, the technology for improving single-photon source refers to
Mark, improves the technical merit of photon source system, realizes the solution of high-speed single photon source system, in high-resolution light
Spectrometry, non-destructive species analysis, the detection of high speed phenomenon, rigorous analysis, air survey dirt, bioluminescence, radioactivity prospecting, height
The fields such as energy physics, astronomical survey light, laser ranging, laser radar, are with a wide range of applications.
Description of the drawings
Fig. 1 is the structural schematic diagram of single-photon source single photon output system of the present invention；
Fig. 2 is that the serial/parallel conversion unit electric signal sequential of the single-photon source single photon output system of the embodiment of the present invention is closed
System's figure；
Fig. 3 is the photoswitch control logic figures of N × 1 of the single-photon source single photon output system of the embodiment of the present invention；
Fig. 4 is the photoswitch working method schematic diagrames of N × 1 of the single-photon source single photon output system of the embodiment of the present invention；
Fig. 5 is the photoswitch signal sequence relational graphs of N × 1 of the single-photon source single photon output system of the embodiment of the present invention；
Fig. 6 is the single-photon source single photon output system that 1 single photon output speed of the embodiment of the present invention rises to four times
Structural schematic diagram；
Fig. 7 is the 1 of the single-photon source single photon output system that 1 single photon output speed of the embodiment of the present invention rises to four times
× 4 electric switch schematic diagrames；
Fig. 8 is the single-photon source single photon output system that 2 single photon output speed of the embodiment of the present invention rises to 16 times
Structural schematic diagram；
Fig. 9 is the single-photon source single photon output system that 3 single photon output speed of the embodiment of the present invention rises to 64 times
The structural schematic diagram of system.
Specific implementation mode
It elaborates below in conjunction with the accompanying drawings to the specific implementation mode of the present invention.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The all other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The present invention provides a kind of single-photon source single photon output system and control methods, are illustrated below.
By quantum-mechanical theory it is found that single photon is the not subdivisible quantum limit of light, the least unit of light energy
It is a photon, therefore, a kind of limit of light source ability is to realize the controllable output of single photon.
The output single photon pulses flow velocity rate of single-photon source device, is restricted by many factors such as formation efficiencies.It is high defeated
Going out the single-photon source of rate, not only price is high but also is limited by the block of abroad high-tech, in order to solve the life of single-photon source device
At the restricted problem of single photon rate.The present invention relates to a kind of single-photon source improve single photon output speed system and method,
Including sequentially connected serial/parallel conversion unit, single photon set of source, the photoswitches of N × 1, and the control that is bi-directionally connected with it
Device.Shorten the minimum time interval between single photon, improves single photon output speed, solve high-speed single photon source device
The restricted problem of technology and economy.
If Fig. 1 shows the structural schematic diagram of single-photon source single photon output system of the present invention, as shown in Figure 1, the system
May include：
Serial/parallel conversion unit 1, single photon set of source 2, the photoswitches of N × 13 and controller 4；
The serial/parallel conversion unit 1, single photon set of source 2, the photoswitches of N × 13 are sequentially connected；
The controller 4 is bi-directionally connected with serial/parallel conversion unit 1, single photon set of source 2 and the photoswitches of N × 13 respectively；
Serial/parallel conversion unit 1 is connected with single photon set of source 2 by the same type cable of N root same performance equal lengths
It connects, single photon set of source 2 is connect with the photoswitches of N × 13 by the same type optical fiber of N root same performance equal lengths.
Wherein, the serial/parallel conversion unit 1, for 1 road high speed serialization electric signal of input terminal to be converted to low bit rate rate
The parallel electric signal in the roads N；
The serial/parallel conversion unit 1 may include the serial/parallel conversion unit of 1 × N electric switches or first in first out；
1 × N electric switches are revolving MEMS (MEMS, Micro-Electro-Mechanical
System) 1 × N electric switches.
The single photon set of source 2, for by the single-photon source unit of N number of same performance by the parallel telecommunications in the roads N
Number be converted to the parallel optical signal in the roads N；
The single photon set of source 2 is made of the single-photon source unit parallel arranged of N number of same performance, and N takes positive integer；
The single-photon source unit is independent single-photon source or single-photon source array device；
The single-photon source may include parametric down conversion single-photon source, quantum dot single-photon source, nano-antenna single photon
Source；
The single-photon source array may include parametric down conversion single-photon source array device, quantum dot single-photon source array
Device, nano-antenna single-photon source array device；
Single-photon source array device is formed and is packaged together by identical single-photon source unit parallel arranged.
Specifically, the photoswitches of the N × 13, for the parallel optical signal in the roads N to be converted to the serial optical signal in 1 road, and
It is exported in output end；
The photoswitches of the N × 13 may include mechanical optical switch, waveguide optical switch and MEMS (MEMS,
Micro-Electro-Mechanical System) photoswitch.
The controller 4, for controlling the serial/parallel conversion unit 1, single photon set of source 2 and the photoswitches of N × 13
Working frequency is synchronous, the working time is synchronous synchronous with working condition；The controller 4 is serial/parallel conversion unit 1, single-photon source
Unit group 2 and the photoswitches of N × 13 provide clock signal and control signal, and monitor its warning information；
The controller 4 may include onboard clock and external interface；
The clock source of the onboard clock may include constant-temperature crystal oscillator, rubidium atomic clock, cesium-beam atomic clock；
The external interface may include IRIG-B DC codes interface clock signal, trigger pulse input/output interface,
RS232 management interfaces, USB interface；
The controller 4, which extracts, enters frequency in the input electrical signal of 1 input terminal of serial/parallel conversion unit and phase is same
Walk information.
A kind of control method of single-photon source single photon output system, the method may include：
1 road high speed serialization electric signal is inputted, serial/parallel conversion unit 1 is converted to 1 road high speed serialization electric signal of input low
The parallel electric signal in the roads N of bit rate；
Single photon set of source 2 is by the single-photon source unit concurrent working of N number of same performance respectively by the parallel electricity in the roads N
Signal is converted to the parallel optical signal in the roads N；
The parallel optical signal in the roads N is converted into the serial optical signal in 1 road using the photoswitches of N × 13, and is exported in output end；
Wherein, the input terminal of single-photon source unit x passes through the xth road telecommunications of 1 output end of cable connection serial/parallel conversion unit
Number, the output end of single-photon source unit x is by the xth road optical signal of 3 input terminal of optical fiber connection N × 1 photoswitches, 1≤x≤N.
Fig. 2 shows when the serial/parallel conversion unit electric signal of the single-photon source single photon output system of the embodiment of the present invention
Order relation figure；As shown in Fig. 2, 1 road high speed serialization electric signal of input is converted to low bit rate rate by the serial/parallel conversion unit 1
The parallel electric signal in the roads N, may include：
The serial/parallel conversion unit 1 is controlled the serial/parallel conversion for completing input electrical signal by controller 4,1 tunnel is serial
Electric signal, is converted to the parallel electric signal in the roads N, and N takes positive integer；
The serial/parallel conversion unit 1 is controlled by controller 4, periodically with 1 to N polling mode work at equal intervals, weekly
Phase corresponds to N number of serial electric pulse in serial electric signal；
The serial/parallel conversion unit 1 is controlled by controller 4, and turn-on time is the time interval by 1 electric pulse,
Each electric pulse passes through serial/parallel conversion unit 1 at midpoint of its conduction period or so；
The xth road of corresponding 3 input terminal of the photoswitches of N × 1 of xth road electric signal association of 1 output end of the serial/parallel conversion unit
Optical signal, and in each work period, the input, output end point of the single-photon source unit x in single photon set of source 2
The xth road electric signal of 1 output end of serial/parallel conversion unit, the xth road optical signal of 3 input terminal of the photoswitches of N × 1 are not corresponded to, wherein 1
≤x≤N。
The single photon set of source 2 is parallel by the roads N respectively by the single-photon source unit concurrent working of N number of same performance
Electric signal be converted to the parallel optical signal in the roads N, may include：
The single photon set of source 2 is controlled by controller 4, ensures N number of single-photon source list in single photon set of source 2
Working frequency synchronization between member, working time are synchronous synchronous with working condition holding.
Wherein, described that the parallel optical signal in the roads N is converted into the serial optical signal in 1 road using the photoswitches of N × 13, it can wrap
It includes：
Fig. 3 shows the photoswitches of N × 1 control of the single-photon source single photon output system control method of the embodiment of the present invention
Logic chart periodically arrives N polling modes at equal intervals as shown in figure 3, the photoswitches of the N × 13 control (4) by controller with 1
Work, each cycle correspond to N number of serial light pulse in serial optical signal；
Fig. 4 shows the photoswitch schematic diagrames of N × 1 of the single-photon source single photon output system of the embodiment of the present invention, such as Fig. 4
It is shown, the photoswitches of the N × 13 by controller control (4), keep its working time, working frequency and working condition with it is described
The working time of serial/parallel conversion unit 1, working frequency are synchronous with working condition, by the parallel input optical signal in the roads N, are converted to 1
The serial optical signal in road, N take positive integer；
Fig. 5 shows the photoswitch signal sequence relationships of N × 1 of the single-photon source single photon output system of the embodiment of the present invention
Figure, as shown in figure 5, the 1st in the single photon set of source 2 exports the roads N parallel light to n-th single-photon source unit is total
Signal, the parallel roads optical signal Zhong Mei in the roads N correspond to 1 light pulse in each cycle, and each light pulse is in photoswitch turn-on time
By the photoswitches of N × 13, it is serial that the parallel optical signal in the roads N by the photoswitches of N × 13 is converted to 1 road at the midpoint at interval or so
Optical signal exports.
Specifically, the controller 4 controls the work(of serial/parallel conversion unit 1, single photon set of source 2 and the photoswitches of N × 13
It can execute；
The controller 4 is that serial/parallel conversion unit 1, single photon set of source 2 and the photoswitches of N × 13 provide clock signal
With control signal, and its warning information is monitored；
The controller 4 ensures that work and the periodical land wheel of the photoswitches of N × 13 is periodically polled in serial/parallel conversion unit 1
It is interrelated to ask work, realizes one-to-one relationship, corresponding N × 1 of xth road electric signal association of 1 output end of serial/parallel conversion unit
The xth road optical signal of 3 input terminal of photoswitch, and in each work period, the single-photon source list in single photon set of source 2
The input, output end of first x corresponds to the xth road electric signal of 1 output end of serial/parallel conversion unit, 3 input terminal of the photoswitches of N × 1 respectively
Xth road optical signal, wherein 1≤x≤N；
Wherein, clock sync signal may include working frequency synchronizing signal, operating phase synchronizing signal and working time
Synchronizing signal, warning information are fault warning information.
Embodiment 1
Fig. 6 shows that 1 single photon output speed of the embodiment of the present invention rises to four times of single-photon source single photon output system
The structural schematic diagram of system, as shown in fig. 6, the system may include：
Serial/parallel conversion unit, single photon set of source, 4 × 1 photoswitches and controller；
The serial/parallel conversion unit, single photon set of source, 4 × 1 photoswitches are sequentially connected；
The controller is bi-directionally connected with serial/parallel conversion unit, single photon set of source and 4 × 1 photoswitches respectively；
Serial/parallel conversion unit and single photon set of source by the same type cable connections of 4 same performance equal lengths,
Single photon set of source is connect with 4 × 1 photoswitches by the same type optical fiber of 4 same performance equal lengths.
Wherein, the serial/parallel conversion unit, for 1 road high speed serialization electric signal of input terminal to be converted to the 4 of low bit rate rate
The parallel electric signal in road；
The serial/parallel conversion unit may include the serial/parallel conversion unit of 1 × 4 electric switch or first in first out；
1 × 4 electric switch is 1 × 4 electric switch of revolving MEMS.
Fig. 7 shows that 1 single photon output speed of the embodiment of the present invention rises to four times of single-photon source single photon output system
1 × 4 electric switch working method schematic diagram of system；
The single photon set of source, for by the single-photon source units of 4 same performances by the parallel electric signal in 4 tunnels
Be converted to the parallel optical signal in 4 tunnels；
The single photon set of source is made of the single-photon source unit parallel arranged of 4 same performances, takes N=4；
The single-photon source unit is independent single-photon source or single-photon source array device；
The single-photon source includes parametric down conversion single-photon source, quantum dot single-photon source, nano-antenna single-photon source；
The single-photon source array includes parametric down conversion single-photon source array device, quantum dot single-photon source array device
Part, nano-antenna single-photon source array device；
Single-photon source array device is formed and is packaged together by identical single-photon source unit parallel arranged.
4 × 1 photoswitch, for the parallel optical signal in 4 tunnels to be converted to the serial optical signal in 1 road, and in output end
Output；
4 × 1 photoswitch includes mechanical optical switch, waveguide optical switch and MEMS optical switch.
The controller, the work for controlling the serial/parallel conversion unit, single photon set of source and 4 × 1 photoswitches
Frequency Synchronization, working time are synchronous synchronous with working condition；The controller is serial/parallel conversion unit, single photon set of source
Clock signal and control signal are provided with 4 × 1 photoswitches, and monitors its warning information；
The controller includes onboard clock and external interface；
The clock source of the onboard clock includes constant-temperature crystal oscillator, rubidium atomic clock, cesium-beam atomic clock；
The external interface includes IRIG-B DC codes interface clock signal, trigger pulse input/output interface, RS232 pipes
Manage interface, USB interface；
The controller extraction enters the frequency and Phase synchronization in the input electrical signal of serial/parallel conversion unit input terminal
Information.
A kind of control method of single-photon source single photon output system, the method may include：
1 road high speed serialization electric signal is inputted, serial/parallel conversion unit is converted to 1 road high speed serialization electric signal of input low
The parallel electric signal in 4 tunnels of bit rate；
Single photon set of source is by the single-photon source unit concurrent working of 4 same performances respectively by the parallel electricity in 4 tunnels
Signal is converted to the parallel optical signal in 4 tunnels；
The parallel optical signal in 4 tunnels is converted into the serial optical signal in 1 road using 4 × 1 photoswitches, and is exported in output end；
Wherein, the input terminal of single-photon source unit x passes through the xth road telecommunications of cable connection serial/parallel conversion unit output end
Number, the output end of single-photon source unit x connects the xth road optical signal of 4 × 1 photoswitch input terminals, 1≤x≤4 by optical fiber.
1 road high speed serialization electric signal of input is converted to the parallel electricity in 4 tunnels of low bit rate rate by the serial/parallel conversion unit
Signal, including：
The serial/parallel conversion unit is controlled the serial/parallel conversion for completing input electrical signal by controller, by the electricity that 1 road is serial
Signal is converted to the parallel electric signal in 4 tunnels, and 4 take positive integer；
The serial/parallel conversion unit is controlled by controller, periodically with 1 to 4 polling mode work at equal intervals, each cycle
4 serial electric pulses in corresponding serial electric signal；
The serial/parallel conversion unit is controlled by controller, and turn-on time is the time interval by 1 electric pulse, often
A electric pulse passes through serial/parallel conversion unit at midpoint of its conduction period or so；
The xth road light of corresponding 4 × 1 photoswitch input terminals of xth road electric signal association of the serial/parallel conversion unit output end
Signal, and in each work period, the input, output end of the single-photon source unit x in single photon set of source is distinguished
The xth road electric signal of corresponding serial/parallel conversion unit output end, the xth road optical signal of 4 × 1 photoswitch input terminals, wherein 1≤x≤
4。
The single photon set of source is parallel by 4 tunnels respectively by the single-photon source unit concurrent working of 4 same performances
Electric signal be converted to the parallel optical signal in 4 tunnels, including：
The single photon set of source is controlled by controller, ensures 4 single-photon source units in single photon set of source
Between working frequency is synchronous, the working time is synchronous synchronous with working condition holding.
It is described that the parallel optical signal in 4 tunnels is converted into the serial optical signal in 1 road using 4 × 1 photoswitches, including：
4 × 1 photoswitch is controlled by controller, periodically with 1 to 4 polling mode work at equal intervals, each cycle pair
Answer 4 serial light pulses in serial optical signal；
4 × 1 photoswitch is controlled by controller, keep its working time, working frequency and working condition with it is described string/
And the working time of converting unit, working frequency are synchronous with working condition, by the parallel input optical signal in 4 tunnels, are converted to 1 road string
Capable optical signal；
The total output parallel optical signal in 4 tunnels of the 1st to the 4th single-photon source unit in the single photon set of source,
The parallel roads optical signal Zhong Mei in 4 tunnel of this in each cycle correspond to 1 light pulse, and each light pulse is in photoswitch conduction period
By 4 × 1 photoswitches, it is defeated that the parallel optical signal in 4 tunnel by 4 × 1 photoswitches is converted to the serial optical signal in 1 road at midpoint or so
Go out.
The function of the controller control serial/parallel conversion unit, single photon set of source and 4 × 1 photoswitches executes；
The controller is serial/parallel conversion unit, single photon set of source and 4 × 1 photoswitches provide clock signal and control
Signal processed, and monitor its warning information；
The controller ensures that serial/parallel conversion unit is periodically polled work and work is periodically polled with 4 × 1 photoswitches
Make interrelated, realization one-to-one relationship, corresponding 4 × 1 light of xth road electric signal association of serial/parallel conversion unit output end are opened
The xth road optical signal of input terminal is closed, and in each work period, the single-photon source unit x's in single photon set of source
Input, output end corresponds to the xth road of the xth road electric signal of serial/parallel conversion unit output end, 4 × 1 photoswitch input terminals respectively
Optical signal, wherein 1≤x≤4；
Wherein, clock sync signal includes that working frequency synchronizing signal, operating phase synchronizing signal are synchronous with the working time
Signal, warning information are fault warning information.
For example, specifically in certain implementation project, it is four times to solve the problems, such as to improve single photon output speed, takes N=
4, the single-photon source system of four times of single photon output speed is risen to, serial/parallel conversion unit is revolving MEMS
1 × 4 electric switch of (MEMS, Micro-Electro-Mechanical System).Single photon set of source is same model
The parametric down conversion single-photon source unit of 4 same performances, the single photon of each parametric down conversion single-photon source unit output it
Between minimum time interval Δ τ be 2ns, the maximum output frequencies of single photon pulses is 500MHz.4 × 1 photoswitches are mobile anti-
Penetrate mirror mechanical optical switch.Controller onboard clock is constant-temperature crystal oscillator, and practical constant-temperature crystal oscillator precision is chosen for not being inferior to ± 5ppb,
1ppb=10-9, controller external interface may include：IRIG-B DC code clock signals output interface, 10MHz Low phase noises are direct
Output interface, 1 road 1PPS synchronize input interface, RS232 management interfaces, USB interface and (are not less than USB 2.0, are used for system tune
Examination, data storage and printing).
The technical solution of the present embodiment can improve the rate of the generation single photon of single-photon source system, the monochromatic light of whole system
Sub- output speed is 4 times of single single-photon source device, and the maximum output frequency of single photon pulses is single single-photon source device
4 times, while ensureing not reducing the efficiency of each single-photon source.The single photon of each parametric down conversion single-photon source unit output
Between minimum time interval Δ τ be 2ns, the maximum output frequencies of single photon pulses is 500MHz；Then ensure not reducing each
In the case of single-photon source efficiency, the method for the invention is formed by the minimum between the single photon of single-photon source system output
Interval time isThe maximum output frequency of single photon pulses is 4 × 500=2GHz.Moreover, in each single-photon source
Efficiency do not reduce in the case of, can normally export the light pulse signal flow velocity rate that 4 times of single single-photon source devices allow
Single photon, play improve single-photon source system output bit rate effect of optimization.Integrated innovation, to single-photon source system
System performance indicator produces optimization effect.
The present embodiment can be used in the speed and precision that promote Quantum logic gates as the single photon signal source of high-speed,
In quantum calculation (quantum computation) and the field quantum computer (quantum computer), have extensive
Application prospect.Meanwhile in terms of parametric down conversion single-photon source device, the development of integreted phontonics technology can be promoted, is promoted
The engineer application of photonic integrated circuits (Photonic Integrated Circuit, PIC).
Embodiment 2
Fig. 8 shows that 2 single photon output speed of the embodiment of the present invention rises to 16 times of single-photon source single photon output
The structural schematic diagram of system, as shown in figure 8, the system may include：
Serial/parallel conversion unit, single photon set of source, 16 × 1 photoswitches and controller；
The serial/parallel conversion unit, single photon set of source, 16 × 1 photoswitches are sequentially connected；
The controller is bi-directionally connected with serial/parallel conversion unit, single photon set of source and 16 × 1 photoswitches respectively；
Serial/parallel conversion unit is connected with single photon set of source by the same type cable of 16 same performance equal lengths
It connects, single photon set of source is connect with 16 × 1 photoswitches by the same type optical fiber of 16 same performance equal lengths.
Wherein, the serial/parallel conversion unit, for 1 road high speed serialization electric signal of input terminal to be converted to low bit rate rate
The parallel electric signal in 16 tunnels；
The serial/parallel conversion unit may include the serial/parallel conversion unit of 1 × 16 electric switch or first in first out；
1 × 16 electric switch is 1 × 16 electric switch of revolving MEMS.
The single photon set of source, for by the single-photon source units of 16 same performances by the parallel telecommunications in 16 tunnels
Number be converted to the parallel optical signal in 16 tunnels；
The single photon set of source is made of the single-photon source unit parallel arranged of 16 same performances；
The single-photon source unit is independent single-photon source or single-photon source array device；
The single-photon source includes parametric down conversion single-photon source, quantum dot single-photon source, nano-antenna single-photon source；
The single-photon source array includes parametric down conversion single-photon source array device, quantum dot single-photon source array device
Part, nano-antenna single-photon source array device；
Single-photon source array device is formed and is packaged together by identical single-photon source unit parallel arranged.
16 × 1 photoswitch for the parallel optical signal in 16 tunnels to be converted to the serial optical signal in 1 road, and is exporting
End output；
16 × 1 photoswitch includes mechanical optical switch, waveguide optical switch and MEMS optical switch.
The controller, the work for controlling the serial/parallel conversion unit, single photon set of source and 16 × 1 photoswitches
Working frequency is synchronous, the working time is synchronous synchronous with working condition；The controller is serial/parallel conversion unit, single-photon source unit
Group and 16 × 1 photoswitches provide clock signal and control signal, and monitor its warning information；
The controller includes onboard clock and external interface；
The clock source of the onboard clock includes constant-temperature crystal oscillator, rubidium atomic clock, cesium-beam atomic clock；
The external interface includes IRIG-B DC codes interface clock signal, trigger pulse input/output interface, RS232 pipes
Manage interface, USB interface；
The controller extraction enters the frequency and Phase synchronization in the input electrical signal of serial/parallel conversion unit input terminal
Information.
A kind of control method of single-photon source single photon output system, the method may include：
1 road high speed serialization electric signal is inputted, serial/parallel conversion unit is converted to 1 road high speed serialization electric signal of input low
The parallel electric signal in 16 tunnels of bit rate；
Single photon set of source is parallel by 16 tunnels respectively by the single-photon source unit concurrent workings of 16 same performances
Electric signal is converted to the parallel optical signal in 16 tunnels；
The parallel optical signal in 16 tunnels is converted into the serial optical signal in 1 road using 16 × 1 photoswitches, and defeated in output end
Go out；
Wherein, the input terminal of single-photon source unit x passes through the xth road telecommunications of cable connection serial/parallel conversion unit output end
Number, the output end of single-photon source unit x connects the xth road optical signal of 16 × 1 photoswitch input terminals, 1≤x≤16 by optical fiber.
1 road high speed serialization electric signal of input is converted to the parallel electricity in the roads N of low bit rate rate by the serial/parallel conversion unit
Signal, including：
The serial/parallel conversion unit is controlled the serial/parallel conversion for completing input electrical signal by controller, by the electricity that 1 road is serial
Signal is converted to the parallel electric signal in 16 tunnels；
The serial/parallel conversion unit is controlled by controller, periodically with 1 to 16 polling mode work at equal intervals, weekly
Phase corresponds to 16 serial electric pulses in serial electric signal；
The serial/parallel conversion unit is controlled by controller, and turn-on time is the time interval by 1 electric pulse, often
A electric pulse passes through serial/parallel conversion unit at midpoint of its conduction period or so；
The xth road of corresponding 16 × 1 photoswitch input terminals of xth road electric signal association of the serial/parallel conversion unit output end
Optical signal, and in each work period, the input, output end point of the single-photon source unit x in single photon set of source
The xth road electric signal of serial/parallel conversion unit output end, the xth road optical signal of 16 × 1 photoswitch input terminals are not corresponded to, wherein 1≤
x≤16。
The single photon set of source by the single-photon source unit concurrent workings of 16 same performances respectively by 16 tunnels simultaneously
Capable electric signal is converted to the parallel optical signal in 16 tunnels, including：
The single photon set of source is controlled by controller, ensures 16 single-photon source units in single photon set of source
Between working frequency is synchronous, the working time is synchronous synchronous with working condition holding.
It is described that the parallel optical signal in 16 tunnels is converted into the serial optical signal in 1 road using 16 × 1 photoswitches, including：
16 × 1 photoswitch is controlled by controller, periodically with 1 to 16 polling mode work at equal intervals, each cycle
16 serial light pulses in corresponding serial optical signal；
16 × 1 photoswitch is controlled by controller, keep its working time, working frequency and working condition with it is described
The working time of serial/parallel conversion unit, working frequency are synchronous with working condition, by the parallel input optical signal in 16 tunnels, are converted to 1
The serial optical signal in road；
The total 16 road parallel light letter of output of the 1st to the 16th single-photon source unit in the single photon set of source
Number, the parallel roads optical signal Zhong Mei in 16 tunnels each cycle Zhong Gai correspond to 1 light pulse, and each light pulse is between photoswitch turn-on time
Every midpoint or so by 16 × 1 photoswitches, it is serial that the parallel optical signal in 16 tunnel by 16 × 1 photoswitches is converted to 1 road
Optical signal exports.
The function of the controller control serial/parallel conversion unit, single photon set of source and 16 × 1 photoswitches executes；
The controller is serial/parallel conversion unit, single photon set of source and 16 × 1 photoswitches provide clock signal and control
Signal processed, and monitor its warning information；
The controller ensures that serial/parallel conversion unit is periodically polled work and is periodically polled with 16 × 1 photoswitches
It works interrelated, realizes one-to-one relationship, corresponding 16 × 1 light of xth road electric signal association of serial/parallel conversion unit output end
The xth road optical signal of switch input terminal, and in each work period, the single-photon source unit x in single photon set of source
Input, output end correspond to respectively the xth road electric signal of serial/parallel conversion unit output end, 16 × 1 photoswitch input terminals
The roads x optical signal, wherein 1≤x≤16；
Wherein, clock sync signal includes that working frequency synchronizing signal, operating phase synchronizing signal are synchronous with the working time
Signal, warning information are fault warning information.
For example, specifically in certain implementation project, it is 16 times to solve the problems, such as to improve single photon output speed, takes N
=16, rise to the single-photon source system of 16 times of single photon output speed；Serial/parallel conversion unit may include being sequentially connected
Serial/parallel converter and first in first out caching, the serial/parallel converter completes 1 tunnel and is in series to turning for the parallel electric signal in the roads N
Change, the caching of the first in first out, the roads output end N=16 parallel electric signal per road caching depth be 2 × N × Δ τ=2 ×
16 × 4ns=128ns.For example, if each single-photon source unit output bit rate is 250Mbit/s, the caching depth on the roads Ze Mei
For 250Mbit/s × 128ns=32bits.Single photon set of source is the nano-antenna list of 16 same performances of same model
Photon source unit, the minimum time interval Δ τ between the single photon of each nano-antenna single-photon source unit output is 4ns, single
The maximum output frequency of photon pulse is 250MHz.16 × 1 photoswitches are waveguide type electrooptic effect photoswitch.When built in controller
Clock is rubidium atomic clock, and practical rubidium atomic clock precision is chosen for not being inferior to ± 0.01ppb, and controller external interface may include：
IRIG-B DC code clock signals output interface, the direct output interface of 10MHz Low phase noises, 1 road 1PPS synchronize input interface, RS232
Management interface, USB interface (being not less than USB 3.0, for system debug, data storage and printing).
The technical solution of the present embodiment can improve the rate of the generation single photon of single-photon source system, the monochromatic light of whole system
Sub- output speed is 16 times of single single-photon source device, and the maximum output frequency of single photon pulses is single single-photon source device
16 times of part, while ensureing not reducing the efficiency of each single-photon source.The monochromatic light of each nano-antenna single-photon source unit output
Minimum time interval Δ τ between son is 4ns, and the maximum output frequency of single photon pulses is 250MHz；Then ensure not reducing every
In the case of a single-photon source efficiency, the method for the invention is formed by between the single photon of single-photon source system output most
The closely-spaced time isThe maximum output frequency of single photon pulses is 16 × 250=4GHz.Moreover, in each monochromatic light
In the case that the efficiency of component does not reduce, the light pulse signal stream that 16 times of single single-photon source devices allow can be normally exported
The single photon of rate plays the effect of optimization for the output bit rate for improving single-photon source system.Integrated innovation, to single-photon source
System performance index produce optimization effect.
The present embodiment can be used in single photon signal source, high-resolution spectral measurement, non-destructive species analysis,
The detection of high speed phenomenon, rigorous analysis, air survey dirt, bioluminescence, radioactivity prospecting, high-energy physics, astronomical survey light, Laser Measuring
Away from fields such as, laser radars, it is with a wide range of applications.Meanwhile it in terms of nano-antenna single-photon source device, can promote
The development of integreted phontonics technology, the engineering for promoting photonic integrated circuits (Photonic Integrated Circuit, PIC) are answered
With.
Embodiment 3
Fig. 9 show 3 single photon output speed of the embodiment of the present invention rise to 64 times single-photon source single photon it is defeated
Go out the structural schematic diagram of system, as shown in figure 9, the system may include：
Serial/parallel conversion unit, single photon set of source, 64 × 1 photoswitches and controller；
The serial/parallel conversion unit, single photon set of source, 64 × 1 photoswitches are sequentially connected；
The controller is bi-directionally connected with serial/parallel conversion unit, single photon set of source and 64 × 1 photoswitches respectively；
Serial/parallel conversion unit is connected with single photon set of source by the same type cable of 64 same performance equal lengths
It connects, single photon set of source is connect with 64 × 1 photoswitches by the same type optical fiber of 64 same performance equal lengths.
Wherein, the serial/parallel conversion unit, for 1 road high speed serialization electric signal of input terminal to be converted to low bit rate rate
The parallel electric signal in 64 tunnels；
The serial/parallel conversion unit may include the serial/parallel conversion unit of 1 × 64 electric switch or first in first out；
1 × 64 electric switch is 1 × 64 electric switch of revolving MEMS.
The single photon set of source, for by the single-photon source units of 64 same performances by the parallel telecommunications in 64 tunnels
Number be converted to the parallel optical signal in 64 tunnels；
The single photon set of source is made of the single-photon source unit parallel arranged of 64 same performances；
The single-photon source unit is independent single-photon source or single-photon source array device；
The single-photon source includes parametric down conversion single-photon source, quantum dot single-photon source, nano-antenna single-photon source；
The single-photon source array includes parametric down conversion single-photon source array device, quantum dot single-photon source array device
Part, nano-antenna single-photon source array device；
Single-photon source array device is formed and is packaged together by identical single-photon source unit parallel arranged.
64 × 1 photoswitch for the parallel optical signal in 64 tunnels to be converted to the serial optical signal in 1 road, and is exporting
End output；
64 × 1 photoswitch includes mechanical optical switch, waveguide optical switch and MEMS optical switch.
The controller, the work for controlling the serial/parallel conversion unit, single photon set of source and 64 × 1 photoswitches
Working frequency is synchronous, the working time is synchronous synchronous with working condition；The controller is serial/parallel conversion unit, single-photon source unit
Group and 64 × 1 photoswitches provide clock signal and control signal, and monitor its warning information；
The controller includes onboard clock and external interface；
The clock source of the onboard clock includes constant-temperature crystal oscillator, rubidium atomic clock, cesium-beam atomic clock；
The external interface includes IRIG-B DC codes interface clock signal, trigger pulse input/output interface, RS232 pipes
Manage interface, USB interface；
The controller extraction enters the frequency and Phase synchronization in the input electrical signal of serial/parallel conversion unit input terminal
Information.
A kind of control method of single-photon source single photon output system, the method may include：
1 road high speed serialization electric signal is inputted, serial/parallel conversion unit is converted to 1 road high speed serialization electric signal of input low
The parallel electric signal in 64 tunnels of bit rate；
Single photon set of source is parallel by 64 tunnels respectively by the single-photon source unit concurrent workings of 64 same performances
Electric signal is converted to the parallel optical signal in 64 tunnels；
The parallel optical signal in 64 tunnels is converted into the serial optical signal in 1 road using 64 × 1 photoswitches, and defeated in output end
Go out；
Wherein, the input terminal of single-photon source unit x passes through the xth road telecommunications of cable connection serial/parallel conversion unit output end
Number, the output end of single-photon source unit x connects the xth road optical signal of 64 × 1 photoswitch input terminals, 1≤x≤64 by optical fiber.
It is parallel that 1 road high speed serialization electric signal of input is converted to 64 tunnels low bit rate Shuai by the serial/parallel conversion unit
Electric signal, including：
The serial/parallel conversion unit is controlled the serial/parallel conversion for completing input electrical signal by controller, by the electricity that 1 road is serial
Signal is converted to the parallel electric signal in 64 tunnels；
The serial/parallel conversion unit is controlled by controller, periodically with 1 to 64 polling mode work at equal intervals, weekly
Phase corresponds to 64 serial electric pulses in serial electric signal；
The serial/parallel conversion unit is controlled by controller, and turn-on time is the time interval by 1 electric pulse, often
A electric pulse passes through serial/parallel conversion unit at midpoint of its conduction period or so；
The xth road of corresponding 64 × 1 photoswitch input terminals of xth road electric signal association of the serial/parallel conversion unit output end
Optical signal, and in each work period, the input, output end point of the single-photon source unit x in single photon set of source
The xth road electric signal of serial/parallel conversion unit output end, the xth road optical signal of 64 × 1 photoswitch input terminals are not corresponded to, wherein 1≤
x≤64。
The single photon set of source by the single-photon source unit concurrent workings of 64 same performances respectively by 64 tunnels simultaneously
Capable electric signal is converted to the parallel optical signal in 64 tunnels, including：
The single photon set of source is controlled by controller, ensures 64 single-photon source units in single photon set of source
Between working frequency is synchronous, the working time is synchronous synchronous with working condition holding.
It is described that the parallel optical signal in 64 tunnels is converted into the serial optical signal in 1 road using 64 × 1 photoswitches, including：
64 × 1 photoswitch is controlled by controller, periodically with 1 to 64 polling mode work at equal intervals, each cycle
64 serial light pulses in corresponding serial optical signal；
64 × 1 photoswitch is controlled by controller, keep its working time, working frequency and working condition with it is described
The working time of serial/parallel conversion unit, working frequency are synchronous with working condition, by the parallel input optical signal in 64 tunnels, are converted to 1
The serial optical signal in road；
The total 64 road parallel light letter of output of the 1st to the 64th single-photon source unit in the single photon set of source
Number, the parallel roads optical signal Zhong Mei in 64 tunnels each cycle Zhong Gai correspond to 1 light pulse, and each light pulse is between photoswitch turn-on time
Every midpoint or so by 64 × 1 photoswitches, it is serial that the parallel optical signal in 64 tunnel by 64 × 1 photoswitches is converted to 1 road
Optical signal exports.
The function of the controller control serial/parallel conversion unit, single photon set of source and 64 × 1 photoswitches executes；
The controller is serial/parallel conversion unit, single photon set of source and 64 × 1 photoswitches provide clock signal and control
Signal processed, and monitor its warning information；
The controller ensures that serial/parallel conversion unit is periodically polled work and is periodically polled with 64 × 1 photoswitches
It works interrelated, realizes one-to-one relationship, corresponding 64 × 1 light of xth road electric signal association of serial/parallel conversion unit output end
The xth road optical signal of switch input terminal, and in each work period, the single-photon source unit x in single photon set of source
Input, output end correspond to respectively the xth road electric signal of serial/parallel conversion unit output end, 64 × 1 photoswitch input terminals
The roads x optical signal, wherein 1≤x≤64；
Wherein, clock sync signal includes that working frequency synchronizing signal, operating phase synchronizing signal are synchronous with the working time
Signal, warning information are fault warning information.
For example, specifically in certain implementation project, it is 64 times to solve the problems, such as to improve single photon output speed, takes
N=64 rises to the single-photon source system of 64 times of single photon output speed；
Serial/parallel conversion unit may include sequentially connected serial/parallel converter and the caching of first in first out, described serial/parallel
Converter completes the conversion that 1 tunnel is in series to the parallel electric signal in the roads N, and the caching of the first in first out, the roads output end N=64 are simultaneously
Caching depth of the horizontal electrical signal per road is 2 × N × Δ τ=2 × 64 × 10ns=1280ns.If for example, each single-photon source list
Member output bit rate is 100Mbit/s, and the caching depth on the roads Ze Mei is 100Mbit/s × 1280ns=128bits.Single-photon source
Unit group is the quantum dot single-photon source in 16 channels of 4 groups of same performances of same model, the quantum dot list in each single channel
Minimum time interval Δ τ between the single photon of photon source output is 10ns, and the maximum output frequency of single photon pulses is
100MHz.64 × 1 photoswitches are MEMS (MEMS, the Micro-Electro- of electrostatic drive micro-reflector rotation
Mechanical System) photoswitch.Controller onboard clock is cesium-beam atomic clock, and practical cesium-beam atomic clock precision is chosen for not bad
In ± 0.001ppb, controller external interface may include：IRIG-B DC code clock signals output interface, 10MHz Low phase noises are straight
Connect output interface, 1 road 1PPS synchronizes input interface, RS232 management interfaces, USB interface (are not less than USB 3.0, are used for system tune
Examination, data storage and printing).
The technical solution of the present embodiment can improve the rate of the generation single photon of single-photon source system, the monochromatic light of whole system
Sub- output speed is 64 times of single single-photon source device, and the maximum output frequency of single photon pulses is single single-photon source
64 times of device, while ensureing not reducing the efficiency of each single-photon source.The quantum dot single-photon source output in each single channel
Single photon between minimum time interval Δ τ be 10ns, the maximum output frequencies of single photon pulses is 100MHz；Then ensure not
In the case of reducing each single-photon source efficiency, the method for the invention be formed by single-photon source system output single photon it
Between minimum time interval beThe maximum output frequency of single photon pulses is 64 × 100=6400MHz.And
And in the case where the efficiency of each single-photon source does not reduce, can normally export 64 times of single single-photon source devices allows
Light pulse signal flow velocity rate single photon, play improve single-photon source system output bit rate effect of optimization.It is integrated
Innovation, optimization effect is produced to the system performance index of single-photon source.
The present embodiment can be used in building high speed, the quantum communications reception system of long range, especially structure high speed, length
Quantum key distribution (QKD) system of distance.Meanwhile in terms of quantum dot single-photon source, integreted phontonics technology can be promoted
The engineer application of photonic integrated circuits (Photonic Integrated Circuit, PIC) is promoted in development.
It should be understood by those skilled in the art that, embodiments herein can be provided as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, the application can be used in one or more wherein include computer usable program code computer
The computer program production implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The application is with reference to method, the flow of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Invention is explained in detail with reference to above-described embodiment for pipe, those of ordinary skills in the art should understand that：Still
The specific implementation mode of the present invention can be modified or replaced equivalently, and without departing from any of spirit and scope of the invention
Modification or equivalent replacement should all cover within the claims of the present invention.
Claims (10)
1. a kind of single-photon source single photon output system, which is characterized in that the system comprises：Serial/parallel conversion unit (1), list
Photon set of source (2), the photoswitches of N × 1 (3) and controller (4)；
The serial/parallel conversion unit (1), single photon set of source (2), the photoswitches of N × 1 (3) are sequentially connected；
The controller (4) is two-way with serial/parallel conversion unit (1), single photon set of source (2) and the photoswitches of N × 1 (3) respectively
Connection；
Serial/parallel conversion unit (1) is connected with single photon set of source (2) by the same type cable of N root same performance equal lengths
It connects, single photon set of source (2) is connect with the photoswitches of N × 1 (3) by the same type optical fiber of N root same performance equal lengths.
2. the system as claimed in claim 1, which is characterized in that the serial/parallel conversion unit (1), for 1 tunnel of input terminal is high
Fast serial electric signal is converted to the parallel electric signal in the roads N of low bit rate rate；
The serial/parallel conversion unit (1) includes the serial/parallel conversion unit of 1 × N electric switches or first in first out；
1 × N electric switches are revolving 1 × N of MEMS electric switches.
3. the system as claimed in claim 1, which is characterized in that the single photon set of source (2), for by N number of identical
The parallel electric signal in the roads N is converted to the parallel optical signal in the roads N by the single-photon source unit of performance；
The single photon set of source (2) is made of the single-photon source unit parallel arranged of N number of same performance, and N takes positive integer；
The single-photon source unit is independent single-photon source or single-photon source array device；
The single-photon source includes parametric down conversion single-photon source, quantum dot single-photon source, nano-antenna single-photon source；
The single-photon source array includes parametric down conversion single-photon source array device, quantum dot single-photon source array device, receives
Rice antenna single-photon source array device；
Single-photon source array device is formed and is packaged together by identical single-photon source unit parallel arranged.
4. the system as claimed in claim 1, which is characterized in that the photoswitches of the N × 1 (3), for the parallel light in the roads N to be believed
The serial optical signal in 1 road number is converted to, and is exported in output end；
The photoswitches of the N × 1 (3) include mechanical optical switch, waveguide optical switch and MEMS optical switch.
5. the system as claimed in claim 1, which is characterized in that the controller (4), for controlling the serial/parallel conversion list
First (1), single photon set of source (2) are synchronous with the working frequency of the photoswitches of N × 1 (3), the working time is synchronous and working condition is same
Step；The controller (4) is that serial/parallel conversion unit (1), single photon set of source (2) and the photoswitches of N × 1 (3) provide clock letter
Number and control signal, and monitor its warning information；
The controller (4) includes onboard clock and external interface；
The clock source of the onboard clock includes constant-temperature crystal oscillator, rubidium atomic clock, cesium-beam atomic clock；
The external interface include IRIG-B DC codes interface clock signal, trigger pulse input/output interface, RS232 management connect
Mouth, USB interface；
The controller (4) extraction enters frequency in the input electrical signal of serial/parallel conversion unit (1) input terminal and phase is same
Walk information.
6. such as the control method of Claims 1 to 5 any one of them single-photon source single photon output system, which is characterized in that
The method includes：
1 road high speed serialization electric signal is inputted, 1 road high speed serialization electric signal of input is converted to low code by serial/parallel conversion unit (1)
The parallel electric signal in the roads N of rate；
Single photon set of source (2) is by the single-photon source unit concurrent working of N number of same performance respectively by the parallel telecommunications in the roads N
Number be converted to the parallel optical signal in the roads N；
The parallel optical signal in the roads N is converted into the serial optical signal in 1 road using the photoswitches of N × 1 (3), and is exported in output end；
Wherein, the input terminal of single-photon source unit x passes through the xth road telecommunications of cable connection serial/parallel conversion unit (1) output end
Number, the output end of single-photon source unit x is by the xth road optical signal of the optical fiber connection photoswitches of N × 1 (3) input terminal, 1≤x≤N.
7. method as claimed in claim 6, which is characterized in that the serial/parallel conversion unit (1) goes here and there the 1 tunnel high speed of input
Horizontal electrical signal is converted to the parallel electric signal in the roads N of low bit rate rate, including：
The serial/parallel conversion unit (1) is controlled the serial/parallel conversion for completing input electrical signal by controller (4), 1 tunnel is serial
Electric signal, is converted to the parallel electric signal in the roads N, and N takes positive integer；
The serial/parallel conversion unit (1) is controlled by controller (4), periodically with 1 to N polling mode work at equal intervals, weekly
Phase corresponds to N number of serial electric pulse in serial electric signal；
The serial/parallel conversion unit (1) is controlled by controller (4), and turn-on time is the time interval by 1 electric pulse,
Each electric pulse passes through serial/parallel conversion unit (1) at midpoint of its conduction period or so；
The xth road of corresponding N × 1 photoswitch (3) input terminal of xth road electric signal association of serial/parallel conversion unit (1) output end
Optical signal, and in each work period, the input, output end of the single-photon source unit x in single photon set of source (2)
The xth road electric signal of serial/parallel conversion unit (1) output end, the xth road optical signal of the photoswitches of N × 1 (3) input terminal are corresponded to respectively,
Wherein 1≤x≤N.
8. method as claimed in claim 6, which is characterized in that the single photon set of source (2) passes through N number of same performance
The parallel electric signal in the roads N is converted to the parallel optical signal in the roads N by the concurrent working of single-photon source unit respectively, including：
The single photon set of source (2) is controlled by controller (4), ensures N number of single-photon source in single photon set of source (2)
Working frequency synchronization between unit, working time are synchronous synchronous with working condition holding.
9. method as claimed in claim 6, which is characterized in that described to utilize the photoswitches of N × 1 (3) by the parallel optical signal in the roads N
The serial optical signal in 1 road is converted to, including：
The photoswitches of the N × 1 (3) control (4) by controller, periodically with 1 to N polling mode work at equal intervals, each cycle
N number of serial light pulse in corresponding serial optical signal；
The photoswitches of the N × 1 (3) by controller control (4), keep its working time, working frequency and working condition with it is described
The working time of serial/parallel conversion unit (1), working frequency are synchronous with working condition, by the parallel input optical signal in the roads N, conversion
For the optical signal that 1 road is serial, N takes positive integer；
The 1st in the single photon set of source (2) exports the parallel optical signal in the roads N to n-th single-photon source unit is total, often
The roads optical signal Zhong Mei that the roads N are parallel in period correspond to 1 light pulse, and each light pulse is in photoswitch conduction period
By the photoswitches of N × 1 (3), the parallel optical signal in the roads N is converted to the serial light in 1 road by the photoswitches of N × 1 (3) to be believed point or so
Number output.
10. method as claimed in claim 6, which is characterized in that controller (4) the control serial/parallel conversion unit (1), list
Photon set of source (2) and the function of the photoswitches of N × 1 (3) execute；
The controller (4) is that serial/parallel conversion unit (1), single photon set of source (2) and the photoswitches of N × 1 (3) provide clock
Signal and control signal, and monitor its warning information；
The controller (4) ensures that work and the photoswitches of N × 1 (3) is periodically polled periodically in serial/parallel conversion unit (1)
Poll work is interrelated, realizes that one-to-one relationship, the xth road electric signal association of serial/parallel conversion unit (1) output end correspond to
The xth road optical signal of the photoswitches of N × 1 (3) input terminal, and in each work period, the list in single photon set of source (2)
The input, output end of photon source unit x corresponds to the xth road electric signal of serial/parallel conversion unit (1) output end, the light of N × 1 respectively
The xth road optical signal for switching (3) input terminal, wherein 1≤x≤N；
Wherein, clock sync signal includes working frequency synchronizing signal, operating phase synchronizing signal and working time synchronizing signal,
Warning information is fault warning information.
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