CN105353463A - Apparatus and method for detecting and receiving vortex light field - Google Patents
Apparatus and method for detecting and receiving vortex light field Download PDFInfo
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- CN105353463A CN105353463A CN201510886103.7A CN201510886103A CN105353463A CN 105353463 A CN105353463 A CN 105353463A CN 201510886103 A CN201510886103 A CN 201510886103A CN 105353463 A CN105353463 A CN 105353463A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 12
- 238000013480 data collection Methods 0.000 claims description 8
- 239000003989 dielectric material Substances 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 abstract description 9
- 230000010354 integration Effects 0.000 abstract description 3
- 238000011897 real-time detection Methods 0.000 abstract description 3
- 238000004891 communication Methods 0.000 abstract description 2
- 230000010365 information processing Effects 0.000 abstract description 2
- 238000005253 cladding Methods 0.000 abstract 3
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000011896 sensitive detection Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical compound [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/124—Geodesic lenses or integrated gratings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
- G01J9/02—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength by interferometric methods
- G01J9/0246—Measuring optical wavelength
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/34—Optical coupling means utilising prism or grating
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Spectroscopy & Molecular Physics (AREA)
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses an apparatus and method for detecting and receiving a vortex light field. The apparatus is composed of annular waveguides, inner gratings, cladding gratings and a straight waveguide. The vortex light field is efficiently coupled into the annular waveguides by use of the inner gratings, is accordingly coupled into the straight waveguide and then is transmitted in a waveguide mode. Through detecting a resonance wavelength of the vortex light field, large-scope identification of orbit angular momentum is realized. Through adjusting an incident wavelength to the resonance wavelength, the vortex light field with known orbit angular momentum can also be efficiently received. At the same time, the apparatus employs the cladding gratings to improve the overall performance of a device, can realize performance reconstruction of the device through adjusting the duty ratio of the cladding gratings, and can perform nanometer-magnitude accurate control on the resonance wavelength of the vortex light field. The apparatus and method have the advantages of easy integration, high expandability, miniaturization, large detection scope, real-time detection and the like, and has many important applications in such fields relating to optical communication of the vortex light field, information processing and the like.
Description
Technical field
The present invention relates to optical field, particularly relate to vortex light field field.
Background technology
From the angle of quantum theory, light field can carry spin angular momentum and orbital angular momentum.First the people such as Allen recognize the vortex light field (L.Allenetal., Phys.Rev.A45,8185 (1992)) that orbital angular momentum can be used for explaining and characterize that phase place changes in angular orientation.The angle phase place of this kind of light field and azimuthal relation can be expressed as exp (il φ), and wherein φ represents position angle, l represents topological charge.Can only get with spin angular momentum
two values are different, and the orbital angular momentum that each photon can carry is
wherein l can get arbitrary integer.Similar with circularly polarized light, the symbol of orbital angular momentum has referred to the chirality relative to field orientation.Since optical rail angular momentum is found, this kind of have the vortex light field of helical phase all to play important effect in various fields, such as optical wrench, light tweezer, uranology, quantum entanglement and microscopy etc.In addition, different vortex light fields can be quantified as different states due to the difference torsion rate of its helical phase, therefore can orbital angular momentum be degree of freedom by information coding to vortex light field, thus promote the transmission capacity of network significantly.
Relate in the application of vortex light field a series of, identification orbital angular momentum being carried out to high-fidelity has very important theory value and practical significance.Common detection method comprises use fork-shaped diffraction grating, Mach-Zehnder interferometer and transform optics etc.But along with the increase of vortex light field topological charge number, the equipment needed for detection and the complexity of experiment increase progressively thereupon.Meanwhile, pick-up unit also cannot combine with microminiaturized platform due to the use of bulk optical device, does not meet the development trend of integreted phontonics.Be different from circuit common, integreted phontonics loop makes to use up instead of electronics removes to obtain optical function widely.Due to nanostructured, the fast development surmounting the field such as shaped material and silicon technology, the function of integrated optics chip also obtain great expansion.In recent years, researchers have developed the orbital angular momentum detection technique based on different vortex light fields being converted to the surface plasma wave that space is separated.Required photonic device yardstick can significantly reduce by the features such as the short wavelength of surface plasma and height space locality.Such as, by by specificity hologram and surface plasma photodiode integrated, the real-time detection (P.Genevetetal., Nat.Commun.3,1278 (2013)) of orbital angular momentum can be realized.Such an approach achieves microminiaturization and the integration of sensitive detection parts, but be only applicable to the detection of single orbital angular momentum.The optical antenna of nearest a kind of ring-shaped groove is proved the effective detection (A.Liuetal., Sci.Rep.3,2402 (2013)) that may be used for multiple orbital angular momentum.But this technology depends on the identification of the interference pattern of effects on surface plasma wave, therefore the use due to extra near-field scan device declines to a great extent by detection speed.Up to now, also there is no a kind of effective microminiaturization and be easy to the real-time detection that integrated device can realize large-scale orbital angular momentum.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of device and method that can be used for detecting and receiving vortex light field, to detect and receiving trap cannot meet the large and technological deficiency of detection real-time of device miniaturization, sensing range for solving existing vortex light field simultaneously.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
Detect and receive a device for vortex light field, comprise disc waveguide, interior grating, coating grating and straight wave guide; The material of described coating grating is the medium of refractive index between 2 and 3, and is evenly arranged at the upper surface of disc waveguide; Described interior grating is evenly arranged at the inwall of disc waveguide; Described disc waveguide, interior grating and straight wave guide are same media material, and the refractive index of this dielectric material is greater than 3; Described straight wave guide is arranged near the outer wall of disc waveguide; Described disc waveguide, interior grating is identical with the thickness of straight wave guide and the lower surface of this three is positioned at same plane; Said apparatus entirety is wrapped up by exterior material, and the refractive index of described exterior material is lower than 2.
Further, utilize said apparatus to carry out the detection of the orbital angular momentum of vortex light field, comprise the following steps:
Step one, the vortex light field of the radial polarisation of known orbital angular momentum to be irradiated in disc waveguide from top to bottom as the upper surface of incident field perpendicular to disc waveguide, and the center of incident field overlaps with the geometric center of disc waveguide; Vortex light field is coupled into disc waveguide by interior grating, is coupled into straight wave guide subsequently and transmits with conduction mode in straight wave guide; Guided mode power in detection straight wave guide, and calculate receiving efficiency according to incident field power meter;
Step 2, change the vortex light field of radial polarisation wavelength and repeat step one, obtain the receiving efficiency with the vortex light field of the radial polarisation of this orbital angular momentum with the data of wavelength variations and draw the resonant wavelength wherein corresponding to receiving efficiency peak value;
Step 3, change the vortex light field of radial polarisation orbital angular momentum and repeat step one and two, obtain the resonant wavelength corresponding to receiving efficiency peak value of the vortex light field of the radial polarisation of different orbital angular momentum, form pre-stored data collection;
Step 4, the vortex light field of the radial polarisation of orbital angular momentum known in step one and step 2 is replaced with the vortex light field of radial polarisation to be measured, repeat step one and two, obtain the resonant wavelength corresponding to receiving efficiency peak value of the vortex light field of radial polarisation to be measured;
Step 5, the pre-stored data collection obtained in the resonant wavelength of the vortex light field of the radial polarisation to be measured obtained in step 4 and step 3 to be contrasted, select the pre-stored data identical with the resonant wavelength of the vortex light field of radial polarisation to be measured, and then the orbital angular momentum obtained corresponding to this pre-stored data, be the orbital angular momentum of the vortex light field of radial polarisation to be measured.
Further, in the present invention, a kind of method of efficient reception vortex light field can also be provided based on said apparatus, comprise the following steps:
Step one, repeat above-mentioned detection vortex light field orbital angular momentum method in step one to step 3, obtain the resonant wavelength corresponding to receiving efficiency peak value of the vortex light field of the radial polarisation of different orbital angular momentum, form pre-stored data collection;
Step 2, vortex light field for the radial polarisation of known orbital angular momentum to be received, incident wavelength is adjusted to the resonant wavelength corresponding to this orbital angular momentum according to the pre-stored data collection obtained in the step one of previous step, and this vortex light field vertical irradiation disc waveguide is guaranteed that light field center and disc waveguide geometric center overlap, thus realize receiving the high-level efficiency of radial polarisation vortex light field.
Beneficial effect:
Detection provided by the invention and the device and method receiving vortex light field can be used for the instant on a large scale of the vortex light field of carrying different orbital angular momentum and identify, have important application prospect in fields such as relating to the optical communication of vortex light field and information processing.Principle of the present invention is based on realizing the resonance in a device of vortex light field, and this resonance effects depends on the geometrical structure parameter of device.Therefore, to the radius of disc waveguide and the selection of interior grating quantity, all finally determine the resonant wavelength of vortex light field, also for present invention offers abundant extendability.In addition, common disc waveguide is very weak for the receptivity of vortex light field, and the meaning adding interior grating in the present invention in the inner side of disc waveguide is also to increase the efficiency that vortex light field is coupled into disc waveguide; The effect of straight wave guide is the conduction mode light field in disc waveguide be coupled in straight wave guide, is convenient to the detection to mould field energy in waveguide; Coating grating above disc waveguide can cancellation element energy leakage in the vertical direction, thus the quality factor of remarkable lifting gear, and provide a kind of method accurately controlling resonant wavelength in nanometer scale.Specifically:
(1), the present invention has integration.Multiple device, based on SOI waveguide, to be connected easily through waveguide thus to form detection array by apparatus design proposed by the invention, or combines with laser and other detectors, thus forms integreted phontonics loop.
(2), the present invention has reconstitution and extendability.By changing the dutycycle of coating grating, can to the fine adjustment of vortex light field resonant wavelength, this is beneficial to the efficient reception utilizing the present invention to realize certain specific vortex light field at a certain specified wavelength.When the dutycycle of coating optical grating construction increases (reduction), resonant wavelength can be mobile to long wave (shortwave) accordingly.The sensitivity of modulation is that grating dutycycle often changes 0.1, and resonant wavelength will move 4 nanometers.In addition, by the quantity of grating in adjustment, or the resonance mode that annular waveguide radius removes regulation device can also be adjusted, namely change the vortex light field corresponding to a certain specific resonant wavelength.It is emphasized that, compared to the method by adjustment coating grating dutycycle, it is interior coarse adjustment that the resonant wavelength that this mode provides regulates on a large scale.
Accompanying drawing explanation
Fig. 1 is the vertical view of apparatus of the present invention;
Fig. 2 is the cross-sectional view of apparatus of the present invention;
Fig. 3 be apparatus of the present invention when coating grating dutycycle is 1, to the relation the normalization receiving efficiency of the vortex light field of the radial polarisation of topological charge number from-2 to 2 and wavelength;
Fig. 4 is apparatus of the present invention for the relation the resonant wavelength of the vortex light field of the radial polarisation of topological charge number from-2 to 2 and coating grating dutycycle.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As depicted in figs. 1 and 2, a kind of sniffer detecting and receive vortex light field can be divided into four parts such as disc waveguide 1, interior grating 2, coating grating 3 and straight wave guide 4; The material of described disc waveguide 1, interior grating 2 and straight wave guide 4 is silicon, and the material of coating grating 3 is zinc paste; Described disc waveguide 1 forms ring resonator, and interior grating 2 is positioned at the inwall of disc waveguide 1, and described coating grating 3 is positioned at the upper surface of disc waveguide 1, and described disc waveguide 1, interior grating 2 is identical with the thickness of straight wave guide 4 and lower surface is positioned at same plane; Whole device is by low-index material Silica-coated.The thickness of disc waveguide 1 and straight wave guide 4 and width are respectively 220 nanometers and 550 nanometers, and straight wave guide 4 is arranged near disc waveguide 1 outer wall, and space is therebetween 150 nanometers; The inside radius of disc waveguide 1 is 3.9 microns, have the inwall that 41 interior gratings 2 are distributed in disc waveguide 1 equably, the cycle of interior grating 2 is about 598 nanometers, and the length of side of interior grating 2 is about 60 nanometers, and the width of coating grating 3 and thickness are respectively 550 nanometers and 60 nanometers.
The vortex light field 5 of a branch of radial polarisation is irradiated disc waveguide 1 from top to bottom perpendicular to the upper surface of disc waveguide 1, and guarantees that incident field center overlaps with the geometric center position of disc waveguide 1.Vortex light field is coupled into the Whispering-gallery-mode of disc waveguide 1 by interior grating 2, and is again coupled into straight wave guide 4 and in the internal transmission of straight wave guide 4.According to the guided mode power in incident field and straight wave guide 4, the receiving efficiency of this device for vortex light field 5 can be calculated.Fig. 3 gives when coating grating 3 dutycycle is 1, the relation between the receiving efficiency of the radial polarisation vortex light field 5 of different orbital angular momentum and wavelength.Can find out, for the vortex light field 5 of different orbital angular momentum, the receiving efficiency that always resonant wavelength of existence anduniquess is corresponding the highest.Therefore, the resonant wavelength by detecting radial polarisation vortex light field 5 to be measured effectively can identify the orbital angular momentum of this light field.Simultaneously, for the radial polarisation vortex light field 5 that orbital angular momentum is known, by the resonant wavelength of adjustment incident field wavelength corresponding to light field orbital angular momentum, and make this vortex light field 5 vertical and irradiate disc waveguide 1 in Centered mode, the efficient reception of vortex light field 5 can be realized.
Theoretical according to effective model, when the dutycycle of coating grating 3 changes, the effective mode refractive index of device can change thereupon, and therefore resonant wavelength also can offset.Fig. 4 gives the radial polarisation vortex light field for different orbital angular momentum, the relation between coating grating 3 dutycycle and resonant wavelength.Can very clearly find out, always close to linear relationship between resonant wavelength and dutycycle, because herein is provided a kind of method realizing accurately controlling resonant wavelength by adjustment coating grating 3 dutycycle.In sum, this method is used for detection and receives vortex light field to have device miniaturization, and speed of detection is fast, and investigative range is wide, and extendability is strong and be easy to the feature such as integrated.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. detect and receive a device for vortex light field, it is characterized in that: comprise disc waveguide (1), interior grating (2), coating grating (3) and straight wave guide (4); Described coating grating (3) material is the medium of refractive index between 2 and 3, and is evenly arranged at the upper surface of disc waveguide (1); Described interior grating (2) is evenly arranged at the inwall of disc waveguide (1); Described disc waveguide (1), interior grating (2) and straight wave guide (4) are same media material, and the refractive index of this dielectric material is greater than 3; Described straight wave guide (4) is arranged near the outer wall of disc waveguide (1); Described disc waveguide (1), interior grating (2) is identical with the thickness of straight wave guide (4) and the lower surface of this three is positioned at same plane; Said apparatus entirety is wrapped up by exterior material, and the refractive index of described exterior material is lower than 2.
2. detect a method for the orbital angular momentum of vortex light field, it is characterized in that: comprise the following steps:
Step one, the vortex light field of the radial polarisation of known orbital angular momentum to be irradiated in disc waveguide (1) from top to bottom as the upper surface of incident field perpendicular to disc waveguide (1), and the center of incident field overlaps with the geometric center of disc waveguide (1); Vortex light field is coupled into disc waveguide (1) by interior grating (2), is coupled into straight wave guide (4) subsequently and transmits with conduction mode in straight wave guide (4); Guided mode power in detection straight wave guide (4), and calculate receiving efficiency according to incident field power meter;
Step 2, change the vortex light field of radial polarisation wavelength and repeat step one, obtain the receiving efficiency with the vortex light field of the radial polarisation of this orbital angular momentum with the data of wavelength variations and draw the resonant wavelength wherein corresponding to receiving efficiency peak value;
Step 3, change the vortex light field of radial polarisation orbital angular momentum and repeat step one and two, obtain the resonant wavelength corresponding to receiving efficiency peak value of the vortex light field of the radial polarisation of different orbital angular momentum, form pre-stored data collection;
Step 4, the vortex light field of the radial polarisation of orbital angular momentum known in step one and step 2 is replaced with the vortex light field of radial polarisation to be measured, repeat step one and two, obtain the resonant wavelength corresponding to receiving efficiency peak value of the vortex light field of radial polarisation to be measured;
Step 5, the pre-stored data collection obtained in the resonant wavelength of the vortex light field of the radial polarisation to be measured obtained in step 4 and step 3 to be contrasted, select the pre-stored data identical with the resonant wavelength of the vortex light field of radial polarisation to be measured, and then the orbital angular momentum obtained corresponding to this pre-stored data, be the orbital angular momentum of the vortex light field of radial polarisation to be measured.
3. receive a method for vortex light field, it is characterized in that: comprise the following steps:
Step one, the vortex light field of the radial polarisation of known orbital angular momentum to be irradiated in disc waveguide (1) from top to bottom as the upper surface of incident field perpendicular to disc waveguide (1), and the center of incident field overlaps with the geometric center of disc waveguide (1); Vortex light field is coupled into disc waveguide (1) by interior grating (2), is coupled into straight wave guide (4) subsequently and transmits with conduction mode in straight wave guide (4); Guided mode power in detection straight wave guide (4), and calculate receiving efficiency according to incident field power meter;
Step 2, change the vortex light field of radial polarisation wavelength and repeat step one, obtain the receiving efficiency with the vortex light field of the radial polarisation of this orbital angular momentum with the data of wavelength variations and draw the resonant wavelength wherein corresponding to receiving efficiency peak value;
Step 3, change the vortex light field of radial polarisation orbital angular momentum and repeat step one and two, obtain the resonant wavelength corresponding to receiving efficiency peak value of the vortex light field of the radial polarisation of different orbital angular momentum, form pre-stored data collection;
Step 4, using the vortex light field of the radial polarisation of known orbital angular momentum to be received as incident field, this incident field vertical irradiation disc waveguide (1) by the resonant wavelength of the wavelength regulation of incident field corresponding to this orbital angular momentum, and is guaranteed that light field center and disc waveguide (1) geometric center overlap thus receive incident field by the pre-stored data collection that obtains according to step 3.
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| CN106990547A (en) * | 2017-05-16 | 2017-07-28 | 南开大学 | The super surface of dolphin shape cellular circular array |
| CN105826692B (en) * | 2016-05-26 | 2018-09-07 | 哈尔滨工业大学 | The lens and method of the vortex wave beam with convergence effect are generated based on super surface |
| CN109065703A (en) * | 2018-07-31 | 2018-12-21 | 电子科技大学 | A method of driving magnetic Skyrmion movement |
| CN109683239A (en) * | 2019-01-23 | 2019-04-26 | 上海交通大学 | Vector vortex beams radiator and its application in photon integrated chip |
| CN111579100A (en) * | 2020-05-26 | 2020-08-25 | 河海大学常州校区 | Device and method for detecting topological charge number by using visual M-line method |
| CN112596168A (en) * | 2020-12-21 | 2021-04-02 | 深圳大学 | Vortex light beam generating method and device based on annular spiral fiber grating resonator |
| CN114325937A (en) * | 2021-12-14 | 2022-04-12 | 北京理工大学重庆创新中心 | Orbit angular momentum light beam generation and regulation device based on fork-shaped grating |
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| CN105826692B (en) * | 2016-05-26 | 2018-09-07 | 哈尔滨工业大学 | The lens and method of the vortex wave beam with convergence effect are generated based on super surface |
| CN106990547A (en) * | 2017-05-16 | 2017-07-28 | 南开大学 | The super surface of dolphin shape cellular circular array |
| CN106990547B (en) * | 2017-05-16 | 2021-08-13 | 南开大学 | Dolphin-shaped cellular circle array super surface |
| CN109065703A (en) * | 2018-07-31 | 2018-12-21 | 电子科技大学 | A method of driving magnetic Skyrmion movement |
| CN109683239A (en) * | 2019-01-23 | 2019-04-26 | 上海交通大学 | Vector vortex beams radiator and its application in photon integrated chip |
| WO2020151352A1 (en) * | 2019-01-23 | 2020-07-30 | 上海交通大学 | Vector vortex beam radiator in photonic integrated chip and application thereof |
| CN109683239B (en) * | 2019-01-23 | 2023-09-12 | 上海交大知识产权管理有限公司 | Vector vortex beam radiator in photon integrated chip and application thereof |
| CN111579100A (en) * | 2020-05-26 | 2020-08-25 | 河海大学常州校区 | Device and method for detecting topological charge number by using visual M-line method |
| CN111579100B (en) * | 2020-05-26 | 2021-04-16 | 河海大学常州校区 | Device and method for detecting topological charge number by using visual M-line method |
| CN112596168A (en) * | 2020-12-21 | 2021-04-02 | 深圳大学 | Vortex light beam generating method and device based on annular spiral fiber grating resonator |
| CN112596168B (en) * | 2020-12-21 | 2022-10-18 | 深圳大学 | Vortex light beam generating method and device based on annular spiral fiber grating resonator |
| CN114325937A (en) * | 2021-12-14 | 2022-04-12 | 北京理工大学重庆创新中心 | Orbit angular momentum light beam generation and regulation device based on fork-shaped grating |
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| CN105353463B (en) | 2018-07-03 |
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