CN110518446A - Multi-photon entangled light source - Google Patents
Multi-photon entangled light source Download PDFInfo
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- CN110518446A CN110518446A CN201910830814.0A CN201910830814A CN110518446A CN 110518446 A CN110518446 A CN 110518446A CN 201910830814 A CN201910830814 A CN 201910830814A CN 110518446 A CN110518446 A CN 110518446A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/0007—Applications not otherwise provided for
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
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Abstract
The application provides a kind of multi-photon entangled light source, including laser, the operation material of laser has parity, laser includes optical resonator, optical resonator is parallel plane standing-wave cavity, optical resonator includes laser output and the total reflection end opposite with laser output, operation material generates the laser of two photon entanglement states in the intracavitary stimulated radiation of optical resonance, the laser of two photon entanglement states tangles laser in the intracavitary amplification generation multi-photon of propagating back and forth of optical resonance, total reflection end is tangled laser to multi-photon incident thereon and is totally reflected, so that the multi-photon of the single Entangled State of macro-scale tangles laser and is emitted from laser output.Multi-photon entangled light source provided by the present application enables to the multi-photon exported from laser output to tangle laser with single Entangled State, it is therefore not necessary to quantum calculation can be used for by correspondingly handling, in the application such as quantum detection and quantum communications.
Description
Technical field
This application involves optical fields, in particular to a kind of multi-photon entangled light source.
Background technique
Quantum information science is that quantum mechanics and the product that information science combines have attract crowd since the appearance of last century end
The sight of more physicists.In quantum information science, quantum entanglement is that it is different from one of important feature of classical information, In
Basic quantum physics research field has extremely important status, in quantum cryptography, quantum communications, in the application such as quantum calculation
Play the role of vital.Light quantum information processing method is a kind of quantum information processing method, and photon entanglement state is quantum
The research hotspot of optical field.
Currently, Chinese Scientists Pan Jianwei team has realized the photon entanglement state of ten orders of magnitude, this is current public reporting
International highest level.Ten photon entanglement state of Pan Jianwei team is by being joined using ultraviolet pulse laser pumped nonlinear crystal
The lower conversion of amount generates 5 pairs of independent two-photon entanglement states, then is interfered by multi-photon and obtain ten photon entanglement states.However, Pan Jianwei
The photon entanglement scheme of team is difficult to extend the quantity of the photon in Entangled State.And in quantum calculation, quantum detection and quantum are logical
It needs to be promoted the quantity of entangled photons in the application such as letter, when weakens quantum decoherence effect to improve quantum detection noise.
The prior art discloses a kind of multi-photon entangled light source, can generate macro-scale (quantity of entangled photons up to trillion,
10000000000000 orders of magnitude) multi-photon tangle laser.However, the multi-photon entangled light source can only realize bidirectional output macro-scale
The multi-photon of various dimensions tangles laser, and the multi-photon that cannot achieve unidirectional output macro-scale tangles laser, also can not directly produce
The multi-photon of raw single Entangled State tangles laser.And in specific application (for example, quantum calculation, quantum illumination, quantum radar
Deng) in, unidirectional output light source is mostly used, and mostly use the light that tangles of single Entangled State, therefore, mostly light in the prior art
There is inconvenience in specific application in sub- entangled light source.
Summary of the invention
The one kind that is designed to provide of the embodiment of the present application is able to ascend entangled photons quantity, realizes unidirectional output multi-photon
Laser is tangled, and convenient for the multi-photon entangled light source of application.
A kind of multi-photon entangled light source, including laser, the operation material of the laser are the substance with parity, institute
Stating laser includes optical resonator, and the optical resonator is parallel plane standing-wave cavity, and the optical resonator includes laser
Output end and the total reflection end opposite with the laser output, the operation material is in the intracavitary stimulated radiation of the optical resonance
Two photon entanglement laser are generated, the two photon entanglements laser amplifies the macroscopical ruler of generation in intracavitary propagate back and forth of the optical resonance
The multi-photon of degree tangles laser, and the total reflection end is tangled laser to multi-photon incident thereon and is totally reflected, so that macro
The multi-photon for seeing the single Entangled State of scale tangles laser and is emitted from the laser output.
Multi-photon entangled light source provided by the present application, the operation material of laser have the optical resonance of parity and laser
Chamber is parallel plane standing-wave cavity, and the stimulated radiation in parallel plane standing-wave cavity of the operation material with parity generates two photon entanglements
Laser, two photon entanglement laser carry out back propagation amplification in parallel plane standing-wave cavity can generate macro-scale (entangled photons number
Measure up to trillion orders of magnitude) multi-photon tangle laser, and the total reflection end of parallel plane standing-wave cavity is to being incident on the total reflection end
On multi-photon tangle laser and be totally reflected, enabling to the multi-photon exported from laser output to tangle laser is single entangle
The multi-photon for twining state tangles laser, therefore, can be realized the multi-photon Entangled State laser of unidirectional output macro-scale, and exported
Laser be that the multi-photon of single Entangled State tangles laser, quantum calculation can be used for by needing not move through correspondingly processing, and quantum is visited
In the application such as survey and quantum communications.
Optionally, the laser is gas laser, solid state laser or semiconductor laser.
Optionally, the gas laser is He-Ne laser argon ion laser, carbon dioxide laser or nitrogen point
Sub- laser.
Optionally, the total reflection end includes the first end mirror, and first end mirror is total reflection mirror.
Optionally, the laser output includes the second end mirror, and the multi-photon of the single Entangled State tangles laser from institute
State the outgoing of the second end mirror.
Optionally, the operation material is atom, and ion has the molecule of symmetrical centre or has the crystal of inversion symmetry.
Optionally, the multi-photon entangled light source further includes adjustment component, and the adjustment component setting is defeated in the laser
Side of the outlet far from the total reflection end, and be located in the light optical path out of the laser, the adjustment component is used for institute
State the beam area adjustment to less than its coherent area of laser.
By in the exit direction of laser be arranged adjustment component with by the beam area of laser adjustment to less than its be concerned with
Area, can obtain multi-photon entangled light source and export the pure state multi-photon of single Entangled State tangling.
Optionally, the adjustment component includes the first lens, the second lens, aperture along laser emitting direction setting
Diaphragm and interferometric filter, first lens have the first focal length value, and second lens have the second focal length value, and institute
The first focal length value is stated less than second focal length value, the spacing between first lens and the filters center is second burnt
Away from value；Spacing between first lens and second lens be the first focal length value and the second focal length value and；The hole
Spacing between diameter diaphragm and second lens is the second focal length value.
By enabling adjustment component to have what above structure obtained pure state to tangle light.
Optionally, the single Entangled State is polarization state Entangled State.
Optionally, the multi-photon entangled light source further includes semi-transparent semi-reflecting lens, and the semi-transparent semi-reflecting lens setting swashs described
Light device goes out in light optical path, and is located at the adjustment side of the component far from the laser.
Optionally, the multi-photon entangled light source further includes polarizing film, and going out for the laser is arranged in the polarizing film
In light optical path, and between the adjustment component and the semi-transparent semi-reflecting lens.
Optionally, the single Entangled State is translational state Entangled State.
Optionally, the multi-photon entangled light source further includes electro-magnetic shielding cover, and the electro-magnetic shielding cover is located at described sharp
On the outside of light device.
The one or more embodiments of the detail of the application propose in following attached drawing and description.Other spies of the application
Sign, objects and advantages will become obvious from specification, attached drawing and claims.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application will make below to required in the embodiment of the present application
Attached drawing is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore should not be seen
Work is the restriction to range, for those of ordinary skill in the art, without creative efforts, can be with
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram for the multi-photon entangled light source that the application first embodiment provides；
Fig. 2 is the structural schematic diagram for the multi-photon entangled light source that the application second embodiment provides；
Fig. 3 is the multi-photon entangled light source that one-way laser provided by the present application can export that various dimensions multi-photon tangles
Structural schematic diagram；
Fig. 4 is the structural schematic diagram for the multi-photon entangled light source that the application 3rd embodiment provides.
Icon: multi-photon entangled light source, 10；Laser, 11；Optical resonator, 111；Total reflection end, 112；First end
Mirror, 1121；Laser output, 113；Second end mirror, 1131；Adjustment component, 12；First lens, 121；Second lens, 123；Hole
Diameter diaphragm, 125；Interference filter element, 127；Semi-transparent semi-reflecting lens, 13；Polarizing film, 14.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and
It is not used in restriction the application.
Referring to Fig. 1, the multi-photon entangled light source 10 that the application first embodiment provides is used to export the list of macro-scale
The multi-photon of one Entangled State tangles laser.Herein, macro-scale refers to the quantity of entangled photons up to hundreds of millions orders of magnitude.
Multi-photon entangled light source 10 includes laser 11.Laser 11 can for gas laser, solid state laser and
Semiconductor laser etc..In the present embodiment, laser 11 is gas laser.
Laser 11 includes optical resonator 111.In the present embodiment, optical resonator 111 is parallel plane standing-wave cavity.Light
Learn the laser output 113 that resonant cavity 111 includes total reflection end 112 and is oppositely arranged with total reflection end 112.It is totally reflected end 112
Laser incident thereon can be totally reflected, so that laser is exported from laser output 113.Total reflection end 112 includes
First end mirror 1121.In the present embodiment, the first end mirror 1121 is total reflection mirror.
Operation material in laser 11 is the substance with parity.Substance with parity may, for example, be atom, from
Son, the molecule for having symmetrical centre, the crystal for having inversion symmetry etc..In the present embodiment, operation material is the substance with parity
Corresponding gas laser includes He-Ne laser, argon ion laser, carbon dioxide laser, nitrogen molecular laser etc..
The electronic state and wave function of substance with parity all have parity.The spontaneous radiation process of substance with parity
And stimulated radiation process abides by parity conservation law.The spontaneous radiation in optical resonator 111 of substance with parity generates
Photon state have parity, stimulated radiation generate photon state also there is parity, and have parity photon state be quantum superposition state.
Substance stimulated radiation with parity generates two photon entanglement states.
Two that the substance stimulated radiation with parity generates are enabled to using parallel plane standing-wave cavity as optical resonator
Photon entanglement state is amplified in intracavitary propagate back and forth of optical resonance, and then generates multi-photon Entangled State.In parallel plane standing-wave cavity
Multi-photon Entangled State can indicate are as follows:
When (2.1), when (2.2) occur simultaneously, then:
|Φ2n>OIt is represented by 2n plane polarization Entangled State:
Wherein, | Φ2n> indicating multi-photon Entangled State, lower target is positive and negative positive and negative corresponding with Δ J, when formula (2.1) and formula
(2.2) when Entangled State represented by occurs simultaneously, under be designated as 0；The quantity of 2n expression photon；J is electronic state total angular momentum, | η+>
=| z, KZ>, | η->=|-z ,-KZ> for along the translational state of laser axis (z-axis), KZIt is lost for the wave of photon；|R+> it is right circular polarization state,
The spin angular momentaum m=1 of corresponding photon, | R+>=Ry(π)|R+>, spin angular momentaum m=-1；|L+> it is left state, accordingly
Spin angular momentaum m=-1, | L->=Ry(π)|L+>, spin angular momentaum m=1；Ry(π) is that system for winding measures coordinate y-axis rotation 180
Degree.From the foregoing, it will be observed that two states of the quantum superposition state in parallel plane standing-wave cavity mirror symmetry each other, and mirror symmetry is folded
Add state along two symmetry direction transmittings of laser axis, including translational state Entangled State and polarization state Entangled State, is the multi-photon of various dimensions
Entangled State.
Total reflection end 112 is destroyed parity, and translational state Entangled State disappears, the mostly light exported through laser output 113
The Entangled State that son tangles laser is only left polarization state Entangled State (single Entangled State).The expression formula of the Entangled State may be expressed as:
The corresponding plane polarization Entangled State of the polarization state Entangled State are as follows:
Since total reflection end 112 is destroyed parity, translational state is only left the translational state η along laser axis+, along laser axis
Translational state η-It disappears, translational state Entangled State is destroyed, and therefore, translational state Entangled State disappears, the η in formula (3.1) and formula (3.2)+
The translational state of expression photon, and the translational state Entangled State of non-phonon.
It is appreciated that laser output 113 may include the second end mirror 1131 in the present embodiment.Second end mirror 1131 with
First end mirror 1121 is arranged in parallel, for cooperating with the first end mirror 1121 so that the substance stimulated radiation with parity generated
Two photon entanglement states carry out back propagation amplification in parallel plane standing-wave cavity, and then the multi-photon for generating macro-scale tangles laser.
The sum of the reflectivity of second end mirror 1131 and its transmissivity are 1, and the transmissivity of the second end mirror is greater than 0.Illustratively, work as laser
When device 11 is He-Ne laser, the transmissivity of the second end mirror 1131 is greater than 0 and less than 1%, correspondingly, the second end mirror 1131 it is anti-
Rate is penetrated greater than 99% and less than 1.The transmissivity of second end mirror 1131 can be, for example, 0.9%, 0.7%, 0.5%, 0.3%,
0.1% or any value between the two, correspondingly, the reflectivity of the second end mirror 1131 can be 99.1%, 99.3%,
99.5%, 99.7%, 99.9% or any value between the two.In the present embodiment, the reflectivity of the second end mirror 1131 is
99.7%, and transmissivity is 0.3%.It is appreciated that the transmissivity of the second end mirror 1131 and the specific value of reflectivity are only herein
Example in the case where being He-Ne laser for laser 11, is not limited thereto, if the second end mirror 1131 can be realized with
The cooperation of first end mirror 1121 is so that have two photon entanglement states of the substance stimulated radiation generation of parity in parallel plane standing wave
It is intracavitary come back propagation amplification, and then the multi-photon for generating macro-scale tangles laser, and is all-trans through the first end mirror 1121
The multi-photon for penetrating the single Entangled State that destruction parity obtains, which tangles light, to be emitted from the second end mirror 1131.
It is appreciated that in the present embodiment, the not set optical element for destroying multi-photon Entangled State in parallel plane standing-wave cavity,
Such as polarizing component.
The operation material of the multi-photon entangled light source that the application first embodiment provides, laser has parity and laser
Optical resonator be parallel plane standing-wave cavity, with parity operation material in parallel plane standing-wave cavity stimulated radiation generate
The laser of two photon entanglement states, the laser of the two photon entanglements state can generate macro in the intracavitary amplification of propagation back and forth of optical resonance
The multi-photon for seeing scale (entangled photons quantity up to trillion orders of magnitude) tangles laser, and the total reflection end pair of parallel plane standing-wave cavity
The multi-photon being incident on the total reflection end tangles laser and is totally reflected, and enables to the multi-photon exported from laser output
It tangles the multi-photon that laser is single Entangled State and tangles laser, therefore, the multi-photon that can be realized unidirectional output macro-scale entangles
The laser for twining state laser, and being exported is that the multi-photon of single Entangled State tangles laser, and needing not move through correspondingly processing can use
In quantum calculation, the application such as quantum detection and quantum communications.
It is appreciated that multi-photon entangled light source 10 further includes the electromagnetic screen being located at outside laser 11 in other embodiments
Cover is covered, for preventing external magnetic field from destroying the multi-photon Entangled State in the optical resonator 111 of laser 11.
It is appreciated that multi-photon entangled light source further includes being environmentally isolated component, this is environmentally isolated component for the light to be isolated
Source and environment, to realize anti-decoherence.
It is appreciated that laser 11 can take power stability measure, including firm power in other embodiments
Device.
Referring to Fig. 2, multi-photon entangled light source and the application first embodiment that the application second embodiment provides provide
Multi-photon entangled light source it is roughly the same, the difference is that, laser go out light optical path on be provided with adjustment component 12.
The volume of coherence for the laser beam that laser 11 exports may be expressed as:
V=c3/[v2·Δv·(Δθ)2]
Wherein, c is the light velocity, the frequency for the laser that v is exported by laser 11, the laser that Δ v is exported by laser 11
Halfwidth of line, c/ Δ v be laser source coherence length, the angle of divergence for the laser beam that Δ θ is exported by laser 11.
In the present embodiment, pass through V=c3/[v2·Δv·(Δθ)2] can be derived by:
V=(c2/v2)·(c/Δv)·[1/(Δθ)2],
Wherein, (c2/v2) it is λ2, it follows that (c in above formula2/v2)·[1/(Δθ)2]=(λ/Δ θ)2, therefore can be with
It obtains
V=(c/ Δ v) (λ/Δ θ)2,
Wherein, (c/ Δ v) is the calculation formula of coherence length, and by hereinafter it is found that (λ/Δ θ)2For coherent area
Calculation formula, therefore it can be concluded that volume of coherence is the product of coherence length and coherent area.
Coherent area may be expressed as:
S=(λ/Δ θ)2
Wherein, S is coherent area；
The wavelength for the laser that λ is exported by laser 11；
The angle of divergence for the laser beam that Δ θ is exported by laser 11.
Since the photon in volume of coherence and in coherent area is the homomorphism photon of identical quantum state, and homomorphism photon
For coherent photons.It, will be so that corresponding swash if the angle of divergence or laser line half width of the laser beam that laser 11 exports are larger
It is impure that the volume of coherence of light beam, coherent area very little, and then the multi-photon for causing laser 11 to export tangle laser.Adjust component
The beam area adjustment of 12 laser beam for exporting laser 11 to less than its coherent area, so that comprising adjusting component 12
Multi-photon entangled light source can obtain the pure state multi-photon of single Entangled State and tangle light.In the present embodiment, the light beam of laser beam
Area refers to the area of section of laser beam.
In the present embodiment, adjustment component 12 include along laser emitting direction setting the first lens 121, the second lens 123,
Aperture diaphragm 125 and interferometric filter 127.First lens 121 have the first focal length value.Second lens 123 have the second coke
Away from value.First focal length value is less than the second focal length value.Spacing between 11 center of first lens 121 and laser is the second focal length
Value.Spacing between first lens 121 and the second lens 123 be the first focal length value and the second focal length value and.Aperture diaphragm 127
Spacing between the second lens 123 is the second focal length value.In the present embodiment, the first lens 121 and the second lens 123 are convex
Lens.Interference filter element 127 is ultra-narrow band interference filter element.
In the present embodiment, the first focal length value is 25mm, and the second focal length value is 400mm, the diameter of aperture diaphragm 127 is 1~
7mm, the angle of divergence Δ milliradian of θ=0.02 of the laser exported from aperture diaphragm, corresponding coherent area (λ/Δ θ)2=
909.83mm2.It is appreciated that be only not limited thereto with illustrating herein.
In the present embodiment, laser 11 is He-Ne laser.The a length of 150mm of the chamber of optical resonator 111.Laser 11 is defeated
Laser wavelength lambda out isLaser power 0.1mw, the range of the angle of departure are 2.5~3.5 milliradians.It is appreciated that this
Place is not limited thereto only to illustrate.
Referring to Fig. 3, the application one-way laser can export the multi-photon entangled light source that various dimensions multi-photon tangles
Structure is roughly the same with the structure of multi-photon entangled light source that the application second embodiment provides, the difference is that, also wrap
Include semi-transparent semi-reflecting lens 13.Semi-transparent semi-reflecting lens 13 are arranged in the light optical path out of laser 11, and are located at adjustment component 12 far from sharp
The side of light device 11.Semi-transparent half/anti-mirror 13 can be to the single Entangled State (polarization state Entangled State) that adjusted component 12 is emitted
Multi-photon tangles laser and is adjusted, and tangles laser to retrieve the various dimensions multi-photon comprising translational state and polarization state.
Various dimensions (also including polarization state Entangled State including translational state Entangled State) the multi-photon Entangled State regained is full
Sufficient expression formula:
Wherein, η||,Respectively indicate horizontal direction translational state and vertical direction translational state.
Referring to Fig. 4, the multi-photon entangled light source that the application 3rd embodiment provides, for exporting the single of macro-scale
The multi-photon of Entangled State tangles laser, further includes polarizing film 14 on the basis of structure shown in Fig. 3.The setting of polarizing film 14 exists
Laser 11 goes out in light optical path, and is located between adjustment component 12 and semi-transparent semi-reflecting lens 13.Due in adjustment component 12 and half
It is provided with polarizing film 14 between saturating semi-reflective mirror 13, may make that the laser being emitted through semi-transparent semi-reflecting lens 13 is only to be left translational state to tangle
The multi-photon of state (single Entangled State) tangles laser.The Entangled State that the multi-photon of the translational state Entangled State tangles laser meets as follows
Expression formula:
Or
Wherein, | ξ2n> indicate translational state Entangled State.
In the present embodiment, polarizing film 14 can realize the polarization of X-direction or the polarization of Y direction.
Multi-photon light source provided in this embodiment by added on the basis of embodiment shown in Fig. 2 semi-transparent semi-reflecting lens and partially
Shake piece, so that the multi-photon that the light source of output is single Entangled State (translational state Entangled State) tangles laser.
The above description is only an example of the present application, the protection scope being not intended to limit this application, for ability
For the technical staff in domain, various changes and changes are possible in this application.Within the spirit and principles of this application, made
Any modification, equivalent substitution, improvement and etc. should be included within the scope of protection of this application.
Claims (13)
1. a kind of multi-photon entangled light source, including laser, the operation material of the laser is the substance with parity, described
Laser includes optical resonator, and the optical resonator is parallel plane standing-wave cavity, and the optical resonator includes that laser is defeated
Outlet and the total reflection end opposite with the laser output, the operation material are produced in the intracavitary stimulated radiation of the optical resonance
Raw two photon entanglement laser, the two photon entanglements laser amplify generation macro-scale in intracavitary propagate back and forth of the optical resonance
Multi-photon tangle laser, the total reflection end is tangled laser to multi-photon incident thereon and is totally reflected, so that macroscopical
The multi-photon of the single Entangled State of scale tangles laser and is emitted from the laser output.
2. multi-photon entangled light source according to claim 1, which is characterized in that the laser is gas laser, admittedly
Body laser or semiconductor laser.
3. multi-photon entangled light source according to claim 2, which is characterized in that the gas laser is He-Ne Lasers
Device, argon ion laser, carbon dioxide laser or nitrogen molecular laser.
4. multi-photon entangled light source according to claim 1, which is characterized in that the total reflection end includes the first end mirror,
First end mirror is total reflection mirror.
5. multi-photon entangled light source according to claim 4, which is characterized in that the laser output includes second end
Mirror, the multi-photon of the single Entangled State tangle laser and are emitted from second end mirror.
6. multi-photon entangled light source according to claim 1, which is characterized in that the operation material is atom, and ion has
The molecule of symmetrical centre or the crystal for having inversion symmetry.
7. multi-photon entangled light source according to claim 1, which is characterized in that the multi-photon entangled light source further includes adjusting
Whole group part, side of the laser output far from the total reflection end is arranged in the adjustment component, and is located at the laser
Device goes out in light optical path, and the adjustment component is used for beam area adjustment to less than its coherent area by the laser.
8. multi-photon entangled light source according to claim 7, which is characterized in that the adjustment component includes along the laser
The first lens, the second lens, aperture diaphragm and the interferometric filter of exit direction setting, first lens have the first coke
Away from value, second lens have the second focal length value, and first focal length value is less than second focal length value, and described first thoroughly
Spacing between mirror and the filters center is the second focal length value；Spacing between first lens and second lens
For the first focal length value and the second focal length value and；Spacing between the aperture diaphragm and second lens is the second focal length
Value.
9. multi-photon entangled light source according to any one of claim 1 to 8, which is characterized in that the single Entangled State
For polarization state Entangled State.
10. multi-photon entangled light source according to claim 7, which is characterized in that the multi-photon entangled light source further includes
Semi-transparent semi-reflecting lens, the semi-transparent semi-reflecting lens are arranged in the light optical path out of the laser, and it is separate to be located at the adjustment component
The side of the laser.
11. multi-photon entangled light source according to claim 10, which is characterized in that the multi-photon entangled light source further includes
Polarizing film, the polarizing film are arranged in the light optical path out of the laser, and are located at the adjustment component and described semi-transparent half
Between anti-mirror.
12. multi-photon entangled light source according to claim 11, which is characterized in that the single Entangled State entangles for translational state
Twine state.
13. multi-photon entangled light source according to claim 1, which is characterized in that the multi-photon entangled light source further includes
Electro-magnetic shielding cover, the electro-magnetic shielding cover are located on the outside of the laser.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910830814.0A CN110518446A (en) | 2019-09-04 | 2019-09-04 | Multi-photon entangled light source |
| PCT/CN2020/113183 WO2021043201A1 (en) | 2019-09-04 | 2020-09-03 | Multi-photon entangled light source |
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| CN201910830814.0A CN110518446A (en) | 2019-09-04 | 2019-09-04 | Multi-photon entangled light source |
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| CN112068380A (en) * | 2020-09-07 | 2020-12-11 | 济南量子技术研究院 | BBO crystal-based multimode receiving miniaturized entanglement source system |
| WO2021043201A1 (en) * | 2019-09-04 | 2021-03-11 | 匡一中 | Multi-photon entangled light source |
| CN114430142A (en) * | 2022-04-01 | 2022-05-03 | 中国科学技术大学 | Device for generating entangled photon pairs and method for making same |
| CN116107130A (en) * | 2023-04-12 | 2023-05-12 | 四川大学 | Quantum enhancement method and device for macroscopic quantum entangled state |
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| CN110518446A (en) * | 2019-09-04 | 2019-11-29 | 匡一中 | Multi-photon entangled light source |
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| CN112068380A (en) * | 2020-09-07 | 2020-12-11 | 济南量子技术研究院 | BBO crystal-based multimode receiving miniaturized entanglement source system |
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| CN114430142B (en) * | 2022-04-01 | 2022-07-15 | 中国科学技术大学 | Device for generating entangled photon pairs and method for making same |
| CN116107130A (en) * | 2023-04-12 | 2023-05-12 | 四川大学 | Quantum enhancement method and device for macroscopic quantum entangled state |
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