CN104967824B - Image delivery system based on quantum ghost image and single-mode fiber - Google Patents
Image delivery system based on quantum ghost image and single-mode fiber Download PDFInfo
- Publication number
- CN104967824B CN104967824B CN201510375081.8A CN201510375081A CN104967824B CN 104967824 B CN104967824 B CN 104967824B CN 201510375081 A CN201510375081 A CN 201510375081A CN 104967824 B CN104967824 B CN 104967824B
- Authority
- CN
- China
- Prior art keywords
- photon
- image
- photon detector
- light source
- quantum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of image delivery system based on quantum ghost image and single-mode fiber, the present invention disturbs the characteristics of small using fiber channel to photon frequency, long range distribution is carried out to the two-photon of frequency association in fiber channel, and realizes that the image for utilizing fiber channel transmits over long distances by associating free degree conversion.The problem of solving quantum ghost image of the tradition based on photon space momentum or locus association photon to be difficult to transmit in the single-mode fiber for only supporting single spatial model, thus the transmission of long range image can not be realized using single-mode fiber channel.Further, since make use of quantum state, thus the security of quantum image can be ensured using quantum mechanics physical principle.
Description
Technical field
The invention belongs to quantum information field, is more particularly to a kind of based on the transmission of the image of quantum ghost image and single-mode fiber
System.
Background technology
Quantum information science technology utilizes quantum-mechanical general principle, can realize what conventional information technology was difficult to
Function.Quantum ghost image utilizes the Quantum Correlation between photon to realize the imaging to object, is that one kind has in quantum information field
The technology of abundant physical principle and application potential.
In quantum ghost image, being produced first with quantum light source, there is space to tangle or two photons of associate feature.
One of photon irradiation object, and detected by single point detector.What another photon was sent to that one and object separate has one
Determine the single-photon detector array of spatial resolving power.Because the space quantum between two photons tangles/associate feature, irradiation
The photon of object reaches the position of object and the position of another photon arrival detector and is associated together, thus passes through symbol
Total number measures, and can meet result of detection in single point detector and single-photon detector array with spatial resolving power
In recover the picture of object.The novel part of quantum ghost image is that the detector of record irradiation object photon is single point detector
Without spatial discrimination, and do not shone by the photon of the single-photon detector array detection with certain space resolution capability
Object is penetrated, but can take the photograph object side not irradiating, the picture of object is obtained using both coincidence counting measurements.If by specific image
As object to be imaged, the principle of quantum ghost image can be used to the transmission of image.
Currently, Networks of Fiber Communications is widely laid and utilized, by means of the optical communication technology of Networks of Fiber Communications
Art has also developed highly developed.However, although the principle of quantum ghost image has the potentiality for being used for the transmission of quantum image, due to
The tangling for space momentum/position that traditional quantum ghost image scheme is relied on can not keep in single-mode fiber, this quantum ghost
As principle can not be by means of the realization for the single-mode fiber circuit long range laid extensively, which has limited quantum ghost image principle to exist
Application on long range image tranmission techniques.
The content of the invention
(1) technical problems to be solved
The technical problem to be solved in the present invention is how to realize the transmission of the long range image based on quantum ghost image principle.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides the image based on quantum ghost image and single-mode fiber to transmit system
System, it is characterised in that the system includes：
Quantum light source, for producing the first photon and the second photon of frequency association；
Image sending module, it is connected by single-mode fiber with the quantum light source, receives the institute of the quantum light source transmitting
State the first photon；Described image sending module includes the first spatial dispersion element and the first single-photon detector, first light
Son is handled by the first spatial dispersion element, and different directions is transmitted into according to the difference of frequency, object is irradiated；
First photon that the first single-photon detector detection is reflected or transmitted by object, obtains the first detection time；
Image-receptive processing module, it is connected by single-mode fiber with the quantum light source, passes through communication channel and the figure
As sending module connection, the institute that second photon and described image sending module of the quantum light source transmitting are sent is received
State the first detection time；Described image receiving processing module include second space dispersion element, single-photon detector array and
Processor；Second photon is handled by the second space dispersion element, and different sides is transmitted into according to the difference of frequency
To, and detected by a single-photon detector of corresponding position in the single-photon detector array, when obtaining the second detection
Between；Multiple first detection times, multiple second detection times and the measurement that the processor obtains according to coincidence measurement
Corresponding multiple single photon detections in the single-photon detector single-photon detector array of the multiple second detection time
The positional information of device, the picture of object is calculated by meeting.
Preferably, described image sending module also includes optical circulator, optical fiber collimator and condenser lens；
First photon injects the optical fiber collimator by the optical circulator, and described first is injected after collimation processing
Spatial dispersion element, the first photon projected by the first spatial dispersion element are irradiated to object after the condenser lens
On；By object reflection first photon successively by the condenser lens, the first spatial dispersion element, optical fiber collimator with
And optical circulator, and first single-photon detector is injected by the optical circulator.
Preferably, described image sending module also includes optical fiber collimator, condenser lens and optical fiber collecting device；
First photon injects the optical fiber collimator, and the first spatial dispersion element is injected after collimation processing, by
The first photon that the first spatial dispersion element projects is irradiated on object after the condenser lens；The institute of object transmission
State after the first photon is collected by the optical fiber collecting device and inject first single-photon detector.
Preferably, described image receiving processing module also includes optical fiber collimator, and second photon passes through the optical fiber
After collimating device collimation processing, the second space dispersion compensation module is injected.
Preferably, the quantum light source includes pump light source and is encouraged by the pump light source and produce first light
The nonlinear optical element of son and the second photon.
Preferably, the nonlinear optical element is spontaneous to produce the crystal of transition effects or three ranks of generation under two-stage parametric
The non-linear optical waveguide of four-wave mixing effect.
Preferably, the crystal for producing transition effects under two-stage parametric is the non-thread of various non-centrosymmetry lattice structures
Property optical crystal, periodically poled lithium niobate crystal, periodically poled lithium niobate waveguide, GaAs and indium phosphide etc. have it is non-central right
Claim the semi-conducting material of lattice structure.
It is described produce the spontaneous four-wave mixing effect of three ranks non-linear optical waveguide for silica fibre, chalcogenide glass optical fiber,
Silicon waveguide or gallium nitride waveguide；
The pump light source is pulse pump light source or continuous pump light source.
Preferably, the second space dispersion element is diffraction grating, balzed grating, prism or spatial light modulator；
First single-photon detector is single-photon detector or based superconductive nano wire based on avalanche diode
Single-photon detector；
The single-photon detector array is silicon single-photon detector array, indium phosphorus/InGaAsP single-photon detector battle array
Row, electron multiplying charge coupler or superconducting nano-wire single-photon detector array.
Preferably, described image receiving processing module is replaced with image-receptive delay process module；
Described image reception delay processing module is connected by single-mode fiber with the quantum light source, by communication channel with
Described image sending module connects, and receives second photon and described image the sending module hair of the quantum light source transmitting
First detection time sent；Described image reception delay processing module includes time dispersive element, the second single photon detection
Device and processor；Second photon is handled by the time dispersive element, and different according to frequency carry out different time
Delay after inject second single-photon detector, and detected by second single-photon detector to obtain second detection
Time；For the first detection time each described, the processor determines the second corresponding detection time；The processing
Device is determined by the time dispersive element according to multiple first detection times and corresponding multiple second detection times
Caused multiple delayed datas, using the multiple delayed data, cross the picture for meeting and object being calculated.
Preferably, the single-photon detector is single-photon detector or based superconductive nano wire based on avalanche diode
Single-photon detector；
The time dispersive element is the single-mode fiber with group velocity dispersion, long-period gratings or diffraction grating pair.
(3) beneficial effect
The invention provides a kind of image delivery system based on quantum ghost image and single-mode fiber, the present invention is believed using optical fiber
The characteristics of road is small to photon frequency disturbance, carries out long range distribution, and pass through in fiber channel to the two-photon of frequency association
Associate free degree conversion and realize that the image for utilizing fiber channel transmits over long distances.Solve tradition and be based on photon space momentum or sky
Between position tangle/associate the quantum ghost image of photon and be difficult to transmit in the single-mode fiber for only supporting single spatial model, thus nothing
The problem of method realizes the transmission of long range image using single-mode fiber channel.Further, since make use of quantum state, thus can utilize
Quantum mechanics physical principle ensures the security of quantum image.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the image delivery system based on quantum ghost image and single-mode fiber of the present invention；
Fig. 2 is the structural representation of the image sending module of a preferred embodiment in the present invention；
Fig. 3 is the structural representation of the image sending module of another preferred embodiment in the present invention；
Fig. 4 is the structural representation of the image-receptive processing module of a preferred embodiment in the present invention；
Fig. 5 is the structural representation of the image-receptive delay process module of another preferred embodiment in the present invention；
Fig. 6 a are the image for the original objects that quantum ghost image transmission is carried out using the system of the present invention；
Fig. 6 b are the middle measurement result schematic diagram that quantum ghost image transmission is carried out using the system of the present invention；
Fig. 6 c are to recover obtained image using the system progress quantum ghost image transmission coincidence measurement of the present invention.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.Following examples are used to illustrate this hair
It is bright, but can not be used for limiting the scope of the present invention.
Fig. 1 be the present invention the image delivery system based on quantum ghost image and single-mode fiber structural representation, the system
System includes：
Quantum light source, for producing the first photon and the second photon of frequency association；
Image sending module, it is connected by single-mode fiber with the quantum light source, receives the institute of the quantum light source transmitting
State the first photon；Described image sending module includes the first spatial dispersion element and the first single-photon detector, first light
Son is handled by the first spatial dispersion element, and different directions is transmitted into according to the difference of frequency, object is irradiated；
First photon that the first single-photon detector detection is reflected or transmitted by object, obtains the first detection time；
Image-receptive processing module, it is connected by single-mode fiber with the quantum light source, passes through communication channel and the figure
As sending module connection, the institute that second photon and described image sending module of the quantum light source transmitting are sent is received
State the first detection time；Described image receiving processing module include second space dispersion element, single-photon detector array and
Processor；Second photon is handled by the second space dispersion element, and different sides is transmitted into according to the difference of frequency
To, and detected by a single-photon detector of corresponding position in the single-photon detector array, when obtaining the second detection
Between；The processor is visited according to multiple first detection times, multiple second detection times and measurement the multiple second
Survey the positional information of corresponding multiple single-photon detectors in the single-photon detector single-photon detector array of time, warp
Cross and meet the picture that object is calculated.The processor is according to corresponding to determining first detection time during second detection
Between, according to positional information corresponding to second detection time, the frequency of the second photon is determined, so as to obtain the first photon
Frequency, so that it is determined that the position on the first photon irradiation to object.
Further, described image sending module also includes optical circulator, optical fiber collimator and condenser lens；
First photon injects the optical fiber collimator by the optical circulator, and described first is injected after collimation processing
Spatial dispersion element, the first photon projected by the first spatial dispersion element are irradiated to object after the condenser lens
On；By object reflection first photon successively by the condenser lens, the first spatial dispersion element, optical fiber collimator with
And optical circulator, and first single-photon detector is injected by the optical circulator.
Further, described image sending module also includes optical fiber collimator, condenser lens and optical fiber collecting device；
First photon injects the optical fiber collimator, and the first spatial dispersion element is injected after collimation processing, by
The first photon that the first spatial dispersion element projects is irradiated on object after the condenser lens；The institute of object transmission
State after the first photon is collected by the optical fiber collecting device and inject first single-photon detector.
Further, described image receiving processing module also includes optical fiber collimator, and second photon passes through the light
After fine collimating device collimation processing, the second space dispersion compensation module is injected.
Further, the quantum light source includes pump light source and is encouraged by the pump light source and produce described first
The nonlinear optical element of photon and the second photon.
Further, the nonlinear optical element is to produce the crystal of transition effects under two-stage parametric or produce three ranks certainly
Send out the non-linear optical waveguide of four-wave mixing effect.
Further, the crystal for producing transition effects under two-stage parametric is the non-of various non-centrosymmetry lattice structures
Linear optical crystal, periodically poled lithium niobate crystal, periodically poled lithium niobate waveguide, GaAs and indium phosphide etc. have non-central
The semi-conducting material of symmetric crystal lattice structure.
It is described produce the spontaneous four-wave mixing effect of three ranks non-linear optical waveguide for silica fibre, chalcogenide glass optical fiber,
Silicon waveguide or gallium nitride waveguide；
The pump light source is pulse pump light source or continuous pump light source.
Further, the second space dispersion element is diffraction grating, balzed grating, prism or spatial light modulator；
First single-photon detector is single-photon detector or based superconductive nano wire based on avalanche diode
Single-photon detector；
The single-photon detector array is silicon single-photon detector array, indium phosphorus/InGaAsP single-photon detector battle array
Row, electron multiplying charge coupler or superconducting nano-wire single-photon detector array.
Further, described image receiving processing module is replaced with image-receptive delay process module；
Described image reception delay processing module is connected by single-mode fiber with the quantum light source, by communication channel with
Described image sending module connects, and receives second photon and described image the sending module hair of the quantum light source transmitting
First detection time sent；Described image reception delay processing module includes time dispersive element, the second single photon detection
Device and processor；Second photon is handled by the time dispersive element, and different according to frequency carry out different time
Delay after inject second single-photon detector, and detected by second single-photon detector to obtain second detection
Time；For the first detection time each described, the processor determines the second corresponding detection time；The processing
Device is determined by the time dispersive element according to multiple first detection times and corresponding multiple second detection times
Caused multiple delayed datas, using the multiple delayed data, cross the picture for meeting and object being calculated.
Further, the single-photon detector is single-photon detector or based superconductive nanometer based on avalanche diode
The single-photon detector of line；
The time dispersive element is the single-mode fiber with group velocity dispersion, long-period gratings or diffraction grating pair.
According to delayed data, the frequency of second photon is obtained, the first light is obtained according to the frequency of second photon
The frequency of son, is obtained by first photon irradiation to the position of object according to the frequency of first photon, so as to product
The picture of body.
The core concept of the present invention is：Using the frequency free degree information of photon grown in telecommunication optical fiber channel away from
The characteristics of from can effectively be kept after transmission, using fiber channel to distribution of the photon of frequency association to progress long range, divide
Two photons after hair at two remote away can be kept well in the associate feature of the frequency free degree.The two of distribution
Locate, the photon of different frequency is projected into the difference for irradiating object in different spatial directions by spatial dispersion element at one
Position, collect the single photon of reflection or transmission and detected using single-point single-photon detector, when recording the arrival of single photon
Carve information.Another place can by the photon of different frequency by spatial dispersion element project different spatial directions and then
Information is reached using the single-photon detector An arrayed recording photon with certain space resolution capability, can also be by different frequency
The temporal information that single-point single-photon detector record photon reaches is sent into after photon passage time dispersion element.So by two light
The frequency association characteristic of son is transformed into space-space correlation or space-time association.Pass through the symbol to monochromatic light subevent at two
Total number measures, you can recovers the information of object.The detector of record irradiation object photon is single-point detection in this course
Device does not have spatial discrimination.And do not had by the photon of the single-photon detector array detection with certain space resolution capability
Irradiate object.The recovery of object information must be obtained by both coincidence counting measurements.It is achieved that the work(of quantum ghost image
Energy.Two photons can be sent at remote two by the present invention using optical fiber, be realized the imagery exploitation quantum ghost at one
As principle by fiber channel is sent to the function at another place over long distances.
Embodiment：
As shown in figure 1, the image delivery system based on quantum ghost image and single-mode fiber of the present embodiment specifically include it is as follows
Part：The quantum light source 1 of the generation frequency association two-photon (the first photon and the second photon) of wide range；To frequency in fiber channel
The single-mode fiber 4,5 that two photons of rate association are distributed；The sender 2 (image sending module) of image and the reception of image
3 (image-receptive processing modules) of side.Wherein, the sender 2 of image holds object to be imaged, and passes through single-mode fiber channel 4
Receive a photon of distribution.The single photon of different frequency is irradiated to object by the utilization space dispersion element of sender 2 of image
Different locus, collects the photon of detection reflection or transmission, and the temporal information of the monochromatic light subevent received is led to
Cross the recipient 3 that overt channel (communication channel of the recipient of the sender of image to image) 6 is sent to image.Image connects
Debit 3 receives another photon of distribution photon centering by the single-mode fiber channel 5 of long range, and passes through spatial dispersion element
The photon of arrival is projected into different directions according to the difference of frequency, and by the single-photon detector battle array with spatial resolving power
Row detect and record the corresponding positional information of single photon.The recipient 3 of image can also pass through the single-mode fiber channel 5 of long range
Another photon of distribution is received, and passage time dispersion element introduces the delay of a frequency dependence, profit for the photon of arrival
With the temporal information of single-point single-photon detector (the second single-photon detector) detection record photo-event.The recipient of image
The spatial information or temporal information and the single photon thing of the image sender 2 received of the 3 monochromatic light subevents detected according to oneself
The temporal information of part realizes coincidence measurement, and the result of coincidence measurement reflects the image-forming information of object, so as to the recipient 3 of image
It can realize that the image based on quantum ghost image principle transmits over long distances in spatial domain or time domain to image objects.
Wherein, producing the quantum light source 1 of frequency association photon pair can be realized by nonlinear optics parametric process.Can be with
Non-linear element for realizing this quantum light source includes that the crystal of transition effects under two-stage parametric can be produced and can produced
The non-linear optical waveguide of the spontaneous four-wave mixing effect of raw three ranks.The crystal of transition effects under two-stage parametric can be realized including various
Nonlinear optical crystal, periodically poled lithium niobate crystal, periodically poled lithium niobate waveguide, GaAs and indium phosphide etc. have it is non-in
The semi-conducting material of heart symmetric crystal lattice structure.The non-linear optical waveguide of the spontaneous four-wave mixing effect of three ranks, which can be realized, includes quartz
Optical fiber, chalcogenide glass optical fiber, silicon waveguide, gallium nitride waveguide etc..The pump light for encouraging non-linear process can be pulse pump
Light can also be continuous pump light.
The sender 2 of image, can be using Fig. 2 structure or Fig. 3 according to the needs for collecting reflected light or transmitted light
Structure be irradiated to the diverse location of object come the frequency for realizing according to photon and collect the function of detection.
Fig. 2 structure includes optical fiber collimator 7, spatial dispersion element 8, condenser lens 9, image 10 to be sent, the ring of light
Shape device 11, single-point single-photon detector 12 (the first single-photon detector).Single photon (the first photon) passes through circulator 11 and light
Fine collimater 7 is sent in space, and after spatial dispersion element 8, the light of different frequency is propagated in different spaces direction, through saturating
Focused on after mirror 9 on the diverse location of object 10 to be sent；Object 10 to be sent has the light of spatial distribution in this configuration
Reflection, the photon after reflection pass through backtracking, by being emitted after circulator 11 in one port, are sent into single-point single-photon detecting
Survey in device 12 and record.
Fig. 3 structure includes, optical fiber collimator 7, spatial dispersion element 8, image 10 to be sent, optical fiber collecting device 13
And condenser lens 9, single-point single-photon detector 12 (the first single-photon detector).Single photon (the first photon) is accurate by optical fiber
Space optical path is transmitted into after straight device 7, after spatial dispersion element 8, the light of different frequency is propagated in different spaces direction, through poly-
Focus lens 9 are focused on the diverse location of object 10 to be sent；Object 10 to be sent has spatial distribution in this configuration
Light transmission, the photon after transmission are collected into single-point single-photon detector 12 by an optical fiber collecting device 13 and recorded.
The light path design of the recipient 3 of image in Fig. 1 can have two kinds to realize structure, respectively as shown in Fig. 4 and Fig. 5.
In Fig. 4 structure, including optical fiber collimator 14, spatial dispersion element 15 and the single photon with spatial resolving power
Detector array 16.The different frequency photon of the recipient 3 of image is distributed to through optical fiber, is transmitted into after optical fiber collimator 14
Space optical path, after spatial dispersion element 15, the photon of different frequency will be propagated in different direction in spaces.Using with
The single-photon detector array 16 of spatial resolving power detects and recorded the position that single photon reaches detector.
Fig. 5 structure includes time dispersive element 17 and single-point single-photon detector 18 (the second single-photon detector).
It is distributed to the different frequency photon of the recipient 3 of image through optical fiber, after elapsed time dispersion element 17, obtains different delays.
Detected using with the single-point single-photon detector 18 compared with high time resolution characteristic, and the time letter of record photo-event
Breath.
Wherein, optical fiber collimator can utilize lens combination, either concave mirror or lenslike medium (including gradient folding
Penetrate rate material) etc. the optocoupler propagated in optical fiber synthesized into quasi-parallel light propagated in space.
Wherein, the spatial dispersion element 8,15 that the photon of different frequency is launched to different directions is included into diffraction grating,
The dispersion elements such as balzed grating, prism, spatial light modulator.
Wherein, the photon for changing different frequency reaches the time dispersive element 17 of single-point single-photon detector 18 including various
Single-mode fiber with group velocity dispersion, long-period gratings, diffraction grating equity.
The single-point single-photon detector 12,18 of use includes the single-photon detector based on avalanche diode technology and is based on
Superconducting nano-wire single-photon detector.
The single-photon detector with spatial resolving power this row 16 used can be silicon single-photon detector array, indium
Phosphorus/InGaAsP single-photon detector array, electron multiplying charge coupled apparatus (EMCCD), superconducting nano-wire single photon detection
Device array etc..The work(that spatial discrimination single photon detection can also be realized by carrying out space movement to single-point single-photon detector
Energy.
The wide range frequency association photon of the present embodiment using femtosecond pulse pumped nonlinear silicon nanowire waveguide to being swashed
Encourage spontaneous four-wave mixing effect to produce, the size of the silicon nanowire waveguide cross-section used is 450x220nm, and length is about
11mm.Using widely used CWDM device (CWDM) in optic communication to the non-linear silicon nanowire of pulse pump optical pumping
Caused broad fluorescence Spectra forms spectrum width about 16nm signal photon (1531 ± 8nm) and idler photon after being filtered
(1570 ± 8nm), and the frequency of signal photon and idler photon (the first photon and the second photon) is associated together.Frequently
Signal photon (the first photon) in two photons of rate association is sent to image sender after one section of short fiber transmits, profit
Spatial light emission is converted into optical fiber collimator, conversion of line frequency of the going forward side by side free degree to spatial degrees of freedom, structure such as Fig. 2 institutes
Show.The spatial dispersion element wherein used is a balzed grating, and figure body to be imaged is as shown in Figure 6 a.It is to be imaged shown in Fig. 6 a
Object has the reflectivity of spatial distribution, and black portions represent that reflectivity is high, and white portion represents that reflectivity is low.Object to be imaged
Size be 160 μm x160 μm.Photon after the overfrequency free degree is changed to spatial degrees of freedom will pass in different spaces direction
Broadcast and irradiate the diverse location of object.The one-dimensional grating that is used due to the present embodiment carries out spatial dispersion, thus signal photon
The hot spot of irradiation object forms a line segment, about 200 μm of span, is laterally covering the scope of object to be imaged.
Idler photon (the second photon) is distributed to the recipient of image using 50km standard traffic single-mode fiber.In this reality
Apply in example, make use of the GVD of standard traffic single-mode fiber to carry out the single photon frequency free degree to the time free degree
Conversion.The GVD coefficient of standard traffic single-mode fiber is about 17ps/nm/km, is estimated according to the spectrum width of idler photon
Wave-packet duration after broadening is 14ns.
Detection in the present embodiment to single photon is using indium phosphorus/InGaAsP single-photon detector, to single photon thing
The time of part records the Single Photon Counting module using resolving accuracy about 164.6ps.The recipient of image is led to
The single photon event time information realization crossed the temporal information of the monochromatic light subevent of the sender of analysis image and oneself detected
Time domain coincidence measurement.Time domain coincidence measurement result reflects the reflectivity point of the object to be imaged in signal photon range of exposures
Cloth.Fig. 6 b are a typical coincidence counting results, reflect the reflectivity of the object to be imaged in signal photon range of exposures
Distribution.
Because sender, the different photon of frequency scatter simultaneously through reflection-type balzed grating, in a direction in space in image
Irradiate a linear regions of object.What measurement obtained is the information of one linear regions internal reflection of object every time.By by thing
Body is arranged in space bit moving stage, and mobile object scans object to be imaged and duplicate measurements using the linear regions of photon irradiation,
The transmission of two dimensional image can be realized to object.Fig. 6 c are the objects to be sent transmitted by way of scanning object to be imaged
The result of two dimensional image.Object to be imaged is 10 μm in the moving step length perpendicular to signal photon illuminated line type region direction.This
The result of embodiment illustrates that the two system of the present invention can be realized and image is realized in fiber channel based on quantum ghost image principle
Long range transmission.
Embodiment of above is merely to illustrate the present invention, rather than limitation of the present invention.Although with reference to embodiment to this hair
It is bright to be described in detail, it will be understood by those within the art that, to technical scheme carry out it is various combination,
Modification or equivalent substitution, without departure from the spirit and scope of technical solution of the present invention, the right that all should cover in the present invention is wanted
Ask among scope.
Claims (10)
1. the image delivery system based on quantum ghost image and single-mode fiber, it is characterised in that the system includes：
Quantum light source, for producing the first photon and the second photon of frequency association；
Image sending module, it is connected by single-mode fiber with the quantum light source, receives described the of quantum light source transmitting
One photon；Described image sending module includes the first spatial dispersion element and the first single-photon detector, the first photon warp
The first spatial dispersion element processing is crossed, different directions is transmitted into according to the difference of frequency, object is irradiated；It is described
First photon that the detection of first single-photon detector is reflected or transmitted by object, obtains the first detection time；
Image-receptive processing module, it is connected with the quantum light source by single-mode fiber, is sent out by communication channel and described image
Module is sent to connect, receive that second photon and described image sending module of quantum light source transmitting send described the
One detection time；Described image receiving processing module includes second space dispersion element, single-photon detector array and processing
Device；Second photon is handled by the second space dispersion element, and different directions is transmitted into according to the difference of frequency, and
Detected by a single-photon detector of corresponding position in the single-photon detector array, obtain the second detection time；Institute
Processor is stated according to multiple first detection times, multiple second detection times and the multiple second detection time of measurement
The single-photon detector array in corresponding multiple single-photon detectors positional information, object is calculated by meeting
Picture.
2. system according to claim 1, it is characterised in that described image sending module also includes optical circulator, optical fiber
Collimater and condenser lens；
First photon injects the optical fiber collimator by the optical circulator, and first space is injected after collimation processing
Dispersion element, the first photon projected by the first spatial dispersion element are irradiated on object after the condenser lens；
By object reflection first photon successively by the condenser lens, the first spatial dispersion element, optical fiber collimator and
Optical circulator, and first single-photon detector is injected by the optical circulator.
3. system according to claim 1, it is characterised in that described image sending module also includes optical fiber collimator, gathered
Focus lens and optical fiber collecting device；
First photon injects the optical fiber collimator, the first spatial dispersion element is injected after collimation processing, by described
The first photon that first spatial dispersion element projects is irradiated on object after the condenser lens；Described the of object transmission
One photon injects first single-photon detector after being collected by the optical fiber collecting device.
4. system according to claim 1, it is characterised in that described image receiving processing module also includes fiber optic collimator
Device, second photon inject the second space dispersion compensation module after optical fiber collimator collimation processing.
5. system according to claim 1, it is characterised in that the quantum light source includes pump light source and by the pump
Pu light source excitation and the nonlinear optical element for producing first photon and the second photon.
6. system according to claim 5, it is characterised in that the nonlinear optical element is lower turn of two-stage parametric of generation
Change the crystal of effect or produce the non-linear optical waveguide of the spontaneous four-wave mixing effect of three ranks.
7. system according to claim 6, it is characterised in that the crystal for producing transition effects under two-stage parametric is non-
The nonlinear optical crystal of Central Symmetry lattice structure and the semi-conducting material with non-centrosymmetry lattice structure；
The non-linear optical waveguide for producing the spontaneous four-wave mixing effect of three ranks is silica fibre, chalcogenide glass optical fiber, silicon ripple
Lead or gallium nitride waveguide；
The pump light source is pulse pump light source or continuous pump light source.
8. system according to claim 1, it is characterised in that the second space dispersion element is diffraction grating, glittering
Grating, prism or spatial light modulator；
First single-photon detector is single-photon detector or the monochromatic light of based superconductive nano wire based on avalanche diode
Sub- detector；
The single-photon detector array is silicon single-photon detector array, indium phosphorus/InGaAsP single-photon detector array, electricity
Sub- multiplying charge coupler or superconducting nano-wire single-photon detector array.
9. according to the system described in any one of claim 1 to 8, it is characterised in that described image receiving processing module image
Reception delay processing module is replaced；
Described image reception delay processing module is connected by single-mode fiber with the quantum light source, by communication channel with it is described
Image sending module connects, and receives second photon and described image the sending module transmission of the quantum light source transmitting
First detection time；Described image reception delay processing module include time dispersive element, the second single-photon detector with
And processor；Second photon is handled by the time dispersive element, and different according to frequency carry out prolonging for different time
When after inject second single-photon detector, and detect to obtain the second detection time by second single-photon detector；It is right
In each first detection time, the processor determines the second corresponding detection time；The processor according to
Multiple first detection times and corresponding multiple second detection times are determined as caused by the time dispersive element
Multiple delayed datas, using the multiple delayed data, cross the picture for meeting and object being calculated.
10. system according to claim 9, it is characterised in that second single-photon detector is based on the pole of snowslide two
The single-photon detector of pipe or the single-photon detector of based superconductive nano wire；
The time dispersive element is the single-mode fiber with group velocity dispersion, long-period gratings or diffraction grating pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510375081.8A CN104967824B (en) | 2015-06-30 | 2015-06-30 | Image delivery system based on quantum ghost image and single-mode fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510375081.8A CN104967824B (en) | 2015-06-30 | 2015-06-30 | Image delivery system based on quantum ghost image and single-mode fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104967824A CN104967824A (en) | 2015-10-07 |
| CN104967824B true CN104967824B (en) | 2018-02-09 |
Family
ID=54221758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510375081.8A Active CN104967824B (en) | 2015-06-30 | 2015-06-30 | Image delivery system based on quantum ghost image and single-mode fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104967824B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108650081B (en) * | 2018-03-30 | 2020-08-04 | 清华大学 | Information transmission method, device and system based on quantum entanglement |
| CN109361833B (en) * | 2018-10-08 | 2020-08-11 | 南昌大学 | Transmission method of single photon compression video transmission device |
| CN109901283B (en) * | 2019-02-01 | 2020-06-26 | 中国科学院西安光学精密机械研究所 | Single-mode single-optical-fiber scanning-free endoscopic imaging system and method |
| CN113009688B (en) * | 2021-03-04 | 2022-05-03 | 清华大学 | Quantum imaging method and quantum imaging system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6217847B1 (en) * | 1994-07-01 | 2001-04-17 | The Board Of Trustees Of The Leland Stanford Junior University | Non-invasive localization of a light-emitting conjugate in a mammal |
| CN1780145A (en) * | 2004-11-24 | 2006-05-31 | 中国科学院物理研究所 | Method and device for producing true random numbers |
| CN101495907A (en) * | 2006-07-27 | 2009-07-29 | 惠普开发有限公司 | Compact systems for generating polarization-entangled photons |
| CN101846745A (en) * | 2010-05-07 | 2010-09-29 | 浙江大学 | Laser radar based on highly-correlated quantum imaging principle |
| CN102130418A (en) * | 2011-01-26 | 2011-07-20 | 清华大学 | Polarization-entangled quantum light source |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2579777B1 (en) * | 2010-06-11 | 2019-07-31 | The Florida International University Board of Trustees | Second generation hand-held optical imager |
-
2015
- 2015-06-30 CN CN201510375081.8A patent/CN104967824B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6217847B1 (en) * | 1994-07-01 | 2001-04-17 | The Board Of Trustees Of The Leland Stanford Junior University | Non-invasive localization of a light-emitting conjugate in a mammal |
| CN1780145A (en) * | 2004-11-24 | 2006-05-31 | 中国科学院物理研究所 | Method and device for producing true random numbers |
| CN101495907A (en) * | 2006-07-27 | 2009-07-29 | 惠普开发有限公司 | Compact systems for generating polarization-entangled photons |
| CN101846745A (en) * | 2010-05-07 | 2010-09-29 | 浙江大学 | Laser radar based on highly-correlated quantum imaging principle |
| CN102130418A (en) * | 2011-01-26 | 2011-07-20 | 清华大学 | Polarization-entangled quantum light source |
Non-Patent Citations (2)
| Title |
|---|
| A heralded single-photon source for quantum;Silva;《Microwave and Optoelectronics Conference (IMOC)》;20100311;全文 * |
| Two-photon "ghost" imaging with thermal light;A. Valencia;《Quantum Electronics and Laser Science Conference》;20051205;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104967824A (en) | 2015-10-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104967824B (en) | Image delivery system based on quantum ghost image and single-mode fiber | |
| Bergman et al. | Photonic network-on-chip design | |
| Lan et al. | A multiplexed quantum memory | |
| Resch et al. | Distributing entanglement and single photons through an intra-city, free-space quantum channel | |
| Han et al. | Theoretical and experimental research on diversity reception technology in NLOS UV communication system | |
| US20200173844A1 (en) | Method and system for measuring orbital angular momentum modes of photons based on spiral transformation | |
| EP2495611A1 (en) | Optical communication system | |
| CN103471718B (en) | Hyperspectral imaging system and method based on sparse aperture compressing calculation correlation | |
| CN104089710B (en) | Far field pulse signal-to-noise ratio measurement method and device based on temporal-spatial resolution | |
| CN103308189A (en) | Entanglement imaging system and method based on dual-compression coincidence measurements | |
| US10145726B2 (en) | Fiber optic acoustic wave detection system | |
| CN102692394A (en) | Two-dimensional imaging method and device based on thermal lens effect | |
| Gao et al. | A quantum key distribution testbed using a plug&play telecom-wavelength single-photon source | |
| CN109324019A (en) | A kind of laser absorption spectrum chromatographic imaging system for the monitoring of axial symmetry combustion field | |
| CN109946710A (en) | A kind of more polarized laser imaging devices of dual wavelength | |
| Johnson et al. | A light-in-flight single-pixel camera for use in the visible and short-wave infrared | |
| CN103763038B (en) | A kind of THz wave communicator based on quantum two-photon entanglement | |
| CN104111463B (en) | Laser frequency shift detecting method and device with dual-cavity F-P interferometer which is formed on the basis of polarization maintaining optical fibers | |
| JP3752538B2 (en) | Optical coupling device | |
| CN106646758A (en) | Self-adaption coupling system for single mode optical fiber based on two-dimensional scanning of optical fiber end surface | |
| Kasap et al. | Cambridge illustrated handbook of optoelectronics and photonics | |
| CN103148895B (en) | The distributing optical fiber sensing method of random code external modulation and device | |
| CN108627984A (en) | Prepare the device of orbital angular momentum maximal entangled state | |
| Rarity et al. | Experimental demonstration of single photon rangefinding using parametric downconversion | |
| Shekel et al. | Shaping single photons through multimode optical fibers using mechanical perturbations |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |