CN110471199A - Isolator based on light Quantum geometrical phase and Faraday effect - Google Patents
Isolator based on light Quantum geometrical phase and Faraday effect Download PDFInfo
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- CN110471199A CN110471199A CN201910698214.3A CN201910698214A CN110471199A CN 110471199 A CN110471199 A CN 110471199A CN 201910698214 A CN201910698214 A CN 201910698214A CN 110471199 A CN110471199 A CN 110471199A
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- magneto
- faraday effect
- microcavity
- light quantum
- geometrical phase
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
- G02F1/093—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect used as non-reciprocal devices, e.g. optical isolators, circulators
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The present invention provides a kind of isolator based on light Quantum geometrical phase and Faraday effect, comprising: optical fiber polarization controller, micronano optical waveguide, magneto-optic memory technique microcavity.The isolator is symmetrical structure, realizes the full magneto-optic memory technique optoisolator that can be integrated in conjunction with the Faraday effect in magneto-optic memory technique by the Quantum geometrical phase using light in magneto-optic memory technique microcavity.
Description
Technical field
The invention belongs to optical microcavity waveguides to couple field, especially a kind of to be imitated based on light Quantum geometrical phase and faraday
The isolator field answered.
Background technique
Optical isolator is a kind of very important nonreciprocal device, has important meaning in the processing of classical and quantum information
Justice.Traditional optical isolator mainly utilizes the Faraday effect in magneto-optical crystal, but for general magneto-optic memory technique
Its Faraday effect is not usually strong, and it is integrated that this makes traditional optoisolator be not easy to device.
It can be used to solve the problems, such as optoisolator device miniaturization using optical microcavity high-quality-factor characteristic.But by
In the symmetry of optical microcavity, the optoisolator based on traditional Faraday effect can not be realized under uniform magnetic field and material.
Therefore, existing to realize that optical isolator is to utilize unsymmetric structure or non-uniform magnetic-field on optical microcavity.However herein
To realize that good optoisolator needs to overcome mismatch problem between magneto-optic memory technique and semiconductor material under situation, processing cost compared with
Height, production efficiency is lower, and scalability is poor.
Recently, the Quantum geometrical phase of the phenomenon that being found in micronano optical structure -- light, i.e. polarization (spin) meeting of light
It influences each other with the track of light.This spin-orbit coupling energy breaks the symmetry of optical microcavity, thus in homogeneous material light
It learns microcavity and realizes that optical isolation provides new scheme basis, filtering, Bright Source Protection, magnetic-field measurement etc. is applied.
Summary of the invention
(1) technical problems to be solved
The present invention provides a kind of Quantum geometrical phases using light in microcavity, in conjunction with the Faraday in magneto-optic memory technique
Effect, realization can integrate the isolator based on light Quantum geometrical phase and Faraday effect.
(2) technical solution
The present invention provides a kind of isolator based on light Quantum geometrical phase and Faraday effect, comprising: optical fiber polarisation
Controller, micronano optical waveguide, magneto-optic memory technique microcavity.The isolator based on light Quantum geometrical phase and Faraday effect is
Symmetrical structure, two of them port are connected as input terminal with two optical fiber polarization controllers, two optical fiber polarization controllers
It is connected with micronano optical waveguide, micronano optical waveguide is fitted closely with magneto-optic memory technique microcavity.
Wherein, material used in magneto-optic memory technique microcavity is high faraday's optical activity coefficient and the magneto-optic material compared with low optical losses
Material, with yttrium iron garnet Y3Fe5O12For, the farad accommodation coefficient of the used material of magneto-optic memory technique microcavity need to be higher than 220 °/centimetre,
Optical absorption coefficient need to be lower than 0.05/ centimetre in 1310nm wave band.
The structure of magneto-optic memory technique microcavity can also be Microsphere Cavities (microsphere), Micro-ring core cavity (microtoroid)
There is the microcavity of curvature on equal boundaries.It needs to apply outside the isolator based on light Quantum geometrical phase and Faraday effect magnetostatic
, perpendicular to the equatorial plane of magneto-optic memory technique microcavity, and magnetic field strength needs so that magneto-optic memory technique reaches saturation, to play isolation work
With.
Preferably, to obtain preferable isolation effect, micronano optical waveguide can be fitted tightly over to magneto-optic memory technique microcavity
High azimuth at.
Preferably, the surface of magneto-optic memory technique microcavity can also be handled to improve its quality factor, also can achieve
Improve the effect of optical isolation.
Preferably, it is also an option that the magneto-optic memory technique microcavity of higher faraday's optical activity coefficient also can achieve raising optical isolation
Effect.(3) beneficial effect
It can be seen from the above technical proposal that the invention has the following advantages:
(1) compared to device is normally isolated, which is full magneto-optic memory technique structure, easy to process, and structure is small, it is possible to reduce
Processing cost.Its optical microcavity and waveguide coupled structure can be on piece, convenient for integrated.
(2) the non-this kind of system of inequality effect that the Quantum geometrical phase combination Faraday effect based on light generates can extend
To other systems, including diamond NV colour center, ion doping crystal etc..
Detailed description of the invention
Fig. 1 is optical isolator system schematic；
Fig. 2 is spherical cavity and optical waveguide system schematic diagram；
Fig. 3 is the Quantum geometrical phase schematic diagram of light in Optical Microsphere Cavities.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.It should be noted that in attached drawing or specification description, similar or identical portion
Divide and all uses identical figure number.The implementation for not being painted or describing in attached drawing is those of ordinary skill in technical field
Known form.In addition, though can provide the demonstration of the parameter comprising particular value herein, it is to be understood that parameter is without definite etc.
In corresponding value, but can be similar to be worth accordingly in acceptable error margin or design constraint.It is mentioned in embodiment
Direction term, such as "upper", "lower", "front", "rear", "left", "right" etc. are only the directions with reference to attached drawing.Therefore, the side used
Protection scope of the present invention is intended to be illustrative and not intended to limit to term.
Specific embodiment is as shown in Figure 1, the isolator based on light Quantum geometrical phase and Faraday effect, packet
It includes: optical fiber polarization controller 1, optical taper coupled waveguide 2, magneto-optic memory technique Microsphere Cavities 3.
The isolator based on light Quantum geometrical phase and Faraday effect is symmetrical structure.
Port 1 and port 2 are used as two input terminals, are connected respectively with two optical fiber polarization controllers 1, two optical fiber are inclined
The controller 1 that shakes controls the light of two input ports, keeps its polarization direction consistent.Two optical fiber polarization controllers 1 and optical taper coupling
Multiplex leads 2 and is connected.
As shown in Fig. 2, the external world applies one and hangs down together with magneto-optic memory technique Microsphere Cavities 3 fit closely with optical taper coupled waveguide 2
Directly in the magnetic field of 3 equatorial plane of magneto-optic memory technique Microsphere Cavities, and magnetic field strength needs so that magneto-optic memory technique reaches saturation, to play isolation work
With.
Wherein, material used in magneto-optic memory technique Microsphere Cavities 3 need to be high faraday's optical activity coefficient and compared with low optical losses
Magneto-optic memory technique, such as yttrium iron garnet Y3Fe5O12。
Wherein, optical taper coupled waveguide 2 can be any other micronano optical waveguide.
Wherein, the micro-cavity structure of magneto-optic memory technique Microsphere Cavities 3 can also be Microsphere Cavities (microsphere), Micro-ring core cavity
(microtoroid) etc. there is the microcavity of curvature on boundaries.
Preferably, to obtain preferable isolation effect, optical taper coupled waveguide 2 can be attached to magneto-optic memory technique Microsphere Cavities 3
High azimuth at.
Preferably, the surface of magneto-optic memory technique Microsphere Cavities 3 can also be handled to improve its quality factor, can also be reached
To the effect for improving optical isolation.
Preferably, it is also an option that the magneto-optic memory technique microcavity of higher faraday's optical activity coefficient also can achieve raising optical isolation
Effect.Optical isolation principle as shown in figure 3, due to light in magneto-optic memory technique Microsphere Cavities 3 Quantum geometrical phase, propagate in magneto-optic material
Line polarisation in material Microsphere Cavities 3 will be presented with the inclined characteristic of circle on its direction of propagation, to generate perpendicular on the direction of propagation
Light spin, for the light of the different directions of propagation, the identical polarization directions will generate opposite direction light spin, to break
The symmetry of magneto-optic memory technique Microsphere Cavities 3 generates optical isolation effect under external magnetic fields.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (9)
1. a kind of isolator based on light Quantum geometrical phase and Faraday effect characterized by comprising optical fiber polarisation control
Device, micronano optical waveguide, magneto-optic memory technique microcavity；
Wherein, the isolator based on light Quantum geometrical phase and Faraday effect is symmetrical structure.
2. the isolator according to claim 1 based on light Quantum geometrical phase and Faraday effect, which is characterized in that its
In, two ports are connected as input terminal with two optical fiber polarization controllers, two optical fiber polarization controllers and micronano optical
Waveguide is connected, and micronano optical waveguide is fitted closely with magneto-optic memory technique microcavity.
3. the isolator according to claim 1 based on light Quantum geometrical phase and Faraday effect, which is characterized in that its
In, material used in magneto-optic memory technique microcavity is magneto-optic memory technique.
4. the isolator according to claim 1 based on light Quantum geometrical phase and Faraday effect, which is characterized in that magnetic
The structure of luminescent material microcavity is Microsphere Cavities (microsphere) or Micro-ring core cavity (microtoroid) structure.
5. the isolator according to claim 1 based on light Quantum geometrical phase and Faraday effect, which is characterized in that magnetic
The structure of luminescent material microcavity need to be the micro-cavity structure that there is curvature on boundary.
6. the isolator according to claim 1 based on light Quantum geometrical phase and Faraday effect, which is characterized in that magnetic
Material used in luminescent material microcavity is with yttrium iron garnet Y3Fe5O12For, farad accommodation coefficient need to be higher than 220 °/centimetre, optics
Absorption coefficient need to be lower than 0.05/ centimetre in 1310nm wave band.
7. the isolator according to claim 1 based on light Quantum geometrical phase and Faraday effect, which is characterized in that institute
Stating needs to apply magnetostatic field outside the isolator based on light Quantum geometrical phase and Faraday effect, perpendicular to magneto-optic memory technique microcavity
The equatorial plane, and magnetic field strength needs so that magneto-optic memory technique reaches saturation, to play buffer action.
8. the isolator according to claim 1 based on light Quantum geometrical phase and Faraday effect, which is characterized in that micro-
Optical waveguide of receiving is fitted tightly at the high azimuth of magneto-optic memory technique microcavity.
9. the isolator according to claim 1 based on light Quantum geometrical phase and Faraday effect, which is characterized in that magnetic
The surface of luminescent material microcavity is by processing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910698214.3A CN110471199B (en) | 2019-07-29 | 2019-07-29 | Isolator based on optical spin orbit coupling and Faraday effect |
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| CN201910698214.3A CN110471199B (en) | 2019-07-29 | 2019-07-29 | Isolator based on optical spin orbit coupling and Faraday effect |
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| CN110471199A true CN110471199A (en) | 2019-11-19 |
| CN110471199B CN110471199B (en) | 2021-03-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112764289A (en) * | 2021-01-11 | 2021-05-07 | 北京邮电大学 | Method for converting optical wavelength based on spherical magneto-optical material by using adjustable magnetic field |
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| CN1869748A (en) * | 2005-03-30 | 2006-11-29 | 英特尔公司 | Integratable optical isolator having mach-zehnder interferometer configuration |
| CN102549465A (en) * | 2009-10-12 | 2012-07-04 | 国际商业机器公司 | Electromagnetic wave isolator and integrated optics device |
| CN105247405A (en) * | 2013-04-01 | 2016-01-13 | 信越化学工业株式会社 | Faraday rotator and light isolator using faraday rotator |
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2019
- 2019-07-29 CN CN201910698214.3A patent/CN110471199B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1869748A (en) * | 2005-03-30 | 2006-11-29 | 英特尔公司 | Integratable optical isolator having mach-zehnder interferometer configuration |
| CN102549465A (en) * | 2009-10-12 | 2012-07-04 | 国际商业机器公司 | Electromagnetic wave isolator and integrated optics device |
| CN105247405A (en) * | 2013-04-01 | 2016-01-13 | 信越化学工业株式会社 | Faraday rotator and light isolator using faraday rotator |
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| EWOLD VERHAGEN AND ANDREA ALÙ: "Optomechanical nonreciprocity", 《NATURE PHYSICS》 * |
| 张芳等: "Nd: YIG中旋轨耦合对磁光效应的影响", 《河南师范大学学报》 * |
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Cited By (1)
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|---|---|---|---|---|
| CN112764289A (en) * | 2021-01-11 | 2021-05-07 | 北京邮电大学 | Method for converting optical wavelength based on spherical magneto-optical material by using adjustable magnetic field |
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| CN110471199B (en) | 2021-03-09 |
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