CN114785422B - System for radial polarized vortex beam interference is transmitted under water - Google Patents
System for radial polarized vortex beam interference is transmitted under water Download PDFInfo
- Publication number
- CN114785422B CN114785422B CN202210397270.5A CN202210397270A CN114785422B CN 114785422 B CN114785422 B CN 114785422B CN 202210397270 A CN202210397270 A CN 202210397270A CN 114785422 B CN114785422 B CN 114785422B
- Authority
- CN
- China
- Prior art keywords
- vortex
- beams
- interference
- light
- beam splitter
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 230000002159 abnormal effect Effects 0.000 claims abstract description 18
- 230000010287 polarization Effects 0.000 claims description 27
- 230000002999 depolarising effect Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 9
- 239000004973 liquid crystal related substance Substances 0.000 claims description 5
- 230000002547 anomalous effect Effects 0.000 abstract description 8
- 238000010587 phase diagram Methods 0.000 description 10
- 238000004891 communication Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000028161 membrane depolarization Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/532—Polarisation modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
The embodiment of the invention relates to a system for transmitting radial polarized vortex beam interference under water, which comprises a vortex beam generating module for generating radial polarized abnormal vortex beams and radial polarized perfect vortex beams, an underwater turbulence environment module for forming different intensity turbulence environments, and an interference pattern receiving module for receiving light intensity information after interference of two vortex beams; the vortex beam generation module is sequentially connected with the underwater turbulence environment module and the interference pattern receiving module. The interference superposition of the radial polarized anomalous vortex light beam and the perfect vortex light beam is realized, and after the radial polarized anomalous vortex light beam and the perfect vortex light beam pass through an underwater turbulence environment, light intensity information is obtained through a CCD camera, so that the light intensity flicker degree of an interference pattern is passed through a PC, and the interference superposition vortex with different topological charge numbers is judged to be influenced by the turbulence environment.
Description
Technical Field
The invention relates to the technical field of laser communication and underwater optical communication, in particular to a system for transmitting radial polarized vortex beam interference underwater.
Background
In recent years, laser technology has been developed, so that the laser technology has wide application in various fields such as information communication, biology, materials, chemistry, national defense and the like. In research, a vortex beam with orbital-angular momentum (OAM) has attracted the attention of students. Unlike a normal gaussian beam, OAM may provide a significant number of multiplexed channels for information transmission. Photons carrying OAM have higher safety, confidentiality and concealment, so vortex beams have higher research significance in the field of optical communication.
With the rise of the fields of underwater optical communication, underwater target detection and the like, the transmission characteristics of laser beams in water environment become research hot spots in recent years. Underwater optical communications present a significant challenge compared to atmospheric environments. When a vortex beam is transmitted in a turbulent flow, an irregular and random movement turbulent flow environment can cause negative influences on beam expansion, depolarization effect, decoherence effect, beam jitter and the like of the vortex beam so as to influence the transmission quality of the vortex beam, so that a proper method is required to be searched for to improve the turbulence resistance of the vortex beam. Therefore, many scholars have conducted researches on the aspect of polarization regulation at the wave source, and the radial polarized light beam is one of them. In the prior art, the interference of the anomalous vortex beam and other vortex beams is less studied on underwater transmission characteristics, and meanwhile, the interference of the radial polarized anomalous vortex beam and the perfect vortex beam is less studied.
The invention is based on the above-mentioned problems to study the transmission characteristics of the interference of radial polarized anomalous vortex beams and perfect vortex beams in underwater turbulence. The method has important practical significance for improving the underwater transmission performance of vortex beams, and has potential guiding significance and engineering value especially in the fields of underwater optical communication, underwater target detection and the like.
It is noted that this section is intended to provide a background or context for the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
Disclosure of Invention
The embodiment of the invention aims to provide a method for transmitting radial polarized vortex beam interference under water, which realizes interference superposition of radial polarized abnormal vortex beams and perfect vortex beams, thereby judging the interference superposition vortex with different topological charges and being influenced by turbulent environment.
The technical scheme of the invention is as follows:
the system for transmitting the radial polarized vortex beam interference under water comprises a vortex beam generating module for generating radial polarized abnormal vortex beams and radial polarized perfect vortex beams, an underwater turbulence environment module for forming different intensity turbulence environments, and an interference pattern receiving module for receiving light intensity information after two vortex beams are interfered;
the vortex beam generation module is sequentially connected with the underwater turbulence environment module and the interference pattern receiving module.
Further, the vortex beam generating module comprises a He-Ne laser, a collimation beam expander, a first beam splitter, a first polarizer, a spatial light modulator, a first radial polarization converter, a reflecting mirror, a second polarizer, a depolarizing beam splitter, a reflective spatial light modulator, a second calculator, a Fourier lens, a second radial polarization converter and a second beam splitter;
the output end of the He-Ne laser is connected with the input end of the collimating and beam expander, and the output end of the collimating and beam expander is connected with the input end of the first beam splitter; the output end of the first beam splitter is divided into two paths of light beams, one path of the light beams is sequentially connected with the first polarizer), the spatial light modulator, the first radial polarization converter, the reflecting mirror and the second beam splitter, and the other path of the light beams is sequentially connected with the second polarizer, the depolarizing beam splitter, the second radial polarization converter and the second beam splitter;
the depolarizing beam splitter is sequentially connected with the Fourier lens, the reflective spatial light modulator and the second calculator.
Further, the vortex beam generating module further comprises a first calculator, and the first calculator is connected with the spatial light modulator.
Further, the collimating beam expander is composed of two convex lenses with coincident focuses.
Further, the turbulent environment module comprises a water tank and a turbulent generator; the water tank is connected with the output end of the second beam splitter, and the turbulence generator is arranged on the water tank.
Further, the interference pattern receiving module comprises a polaroid for adjusting a polarization angle, a diaphragm for adjusting the size of a light spot and a CCD camera;
the input end of the polaroid is connected with the water tank (16), and the output end of the polaroid is sequentially connected with a diaphragm and a CCD camera.
The technical scheme provided by the embodiment of the invention can comprise the following beneficial effects:
the invention provides a system for transmitting radial polarized vortex beam interference under water, which realizes interference superposition of radial polarized abnormal vortex beams and perfect vortex beams, and obtains light intensity information through a CCD camera after the radial polarized abnormal vortex beams and the perfect vortex beams pass through an underwater turbulence environment, so that the light intensity flicker degree of interference patterns is adopted on a PC, and the interference superposition vortex with different topological charge numbers is judged to be influenced by the turbulence environment.
Drawings
Fig. 1 is a schematic diagram of the operation of the present invention.
FIG. 2 is a gray phase diagram of a Bessel vortex beam required in a vortex light generation module of the present invention;
fig. 3 is a gray phase diagram of an anomalous vortex beam required in the vortex light generating module of the present invention.
In the figure, a He-Ne laser, 2, a collimating expander, 3, a first beam splitter, 4, a first polarizer, 5, a spatial light modulator, 6, a first calculator, 7, a first radial polarization converter, 8, a mirror, 9, a second polarizer, 10, a depolarizing beam splitter, 11, a reflective spatial light modulator, 12, a second calculator, 13, a Fourier lens, 14, a second radial polarization converter, 15, a second beam splitter, 16, a water tank, 17, a turbulence generator, 18, a polarizer, 19, a diaphragm, and 20.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
The system for transmitting the radial polarized vortex beam interference under water as shown in fig. 1 comprises a vortex beam generation module (generation of radial polarized anomalous vortex and radial polarized perfect vortex), a turbulent environment module and an interference pattern receiving module. Wherein: the vortex beam generation module is used for generating radial polarized abnormal vortex beams and radial polarized perfect vortex beams; the underwater turbulent environment module is used for forming turbulent environments with different intensities; the interference pattern receiving module is used for receiving light intensity information (radial polarization abnormal vortex light beams and radial polarization perfect vortex light beams) after two vortex light interference.
The vortex beam generating module comprises a He-Ne laser 1, a collimation beam expander 2, a beam splitter 3, a second polarizer 4, a spatial light modulator 5, a first calculator 6, a radial polarization converter 7, a second polarizer 9, a depolarizing beam splitter 10, a reflective spatial light modulator 11, a second calculator 12, a Fourier lens 13, a radial polarization converter 14 and a second beam splitter 15.
The collimating and beam expander 2 is composed of two convex lenses with coincident focuses, and is used for improving the directivity of the light beam, reducing the additional phase generated by vortex light beams during interference, compressing the divergence angle of the light beam and making the light intensity distribution of the vortex light beams observed on a computer uniform.
The radial polarization converter 7 and the radial polarization converter 14 are used to convert linearly polarized light into a radial polarized vortex beam.
The first calculator is used to load a spiral phase map of the anomalous vortex beam onto the spatial light modulator 5. The second calculator 12 is used to load the spiral phase map of the perfectly vortex beam onto the reflective spatial light modulator 11.
A reflective spatial light modulator 11, which allows a maximum reflection angle of + -5 deg., for re-reflecting the formed vortex beam onto a fourier lens 13.
The first polarizer 4 and the second polarizer 9, the light beam will obtain horizontally polarized light after being incident on the polarizers.
A turbulence generator 17 for generating turbulent environments of different intensities. (the turbulence intensity is characterized by the rotation angle of the knob, the larger the rotation angle is, the stronger the turbulence intensity is, and the weaker the opposite is).
The polarizer 18 is used to adjust the polarization angle of the two vortex beams so that the polarization directions of the two vortex beams are perpendicular to each other, and interference superposition occurs.
The diaphragm 19 is used to adjust the spot size.
The interference receiving module is a CCD camera 20 and is used for receiving the light intensity information of the interference superimposed radial polarized vortex, and the light intensity information is transmitted to a computer after being imaged.
After the helium-neon laser outputs a Gaussian beam of a fundamental mode, the Gaussian beam passes through a collimator formed by two convex lenses with coincident focuses, and is split into two beams of light by a beam splitter: one beam is incident to the first polarizer 4, the generated linear polarized light is incident to the pure phase liquid crystal spatial light modulator 5, the linear polarized light is subjected to phase modulation by loading an abnormal vortex light beam gray scale map at the control end of the first calculator 6, a corresponding abnormal vortex light beam is obtained, the abnormal vortex light is incident to the first radial polarization converter 7, and a radial polarization abnormal vortex light beam is generated; the other beam of light enters the second polarizer 9 and then enters the depolarizing beam splitter 10 to reach the reflective spatial light modulator 11, (the reflective pure phase liquid crystal spatial light modulator loads a Bessel Gaussian vortex beam phase diagram) to generate a Bessel Gaussian vortex beam, the Bessel Gaussian vortex beam passes through the Fourier lens 13 to form a perfect vortex beam, and the perfect vortex beam sequentially enters the second radial polarization converter 14 to generate a radial polarized perfect vortex beam.
As shown in fig. 2 and 3, the gray phase diagram required for the vortex beam generating module in the present invention was simulated using software matlab.
The phase expression of the spiral phase plate isPassing Gaussian beam through the phase elementA spiral phase delay can be introduced and cause a phase singularity in the beam center. Gray scale map written by MATLAB, gray scale values are distributed in
Between 0 and 255, and the information loaded on the space light should be distributed from 0 to 1 to the corresponding 0-2 pi phase modulation, the written hologram needs normalization processing. The spiral phase diagram generated by simulation is loaded on the spatial light modulator, so that the phase diagram can be simulated, and the required vortex beam is generated.
By using matlab to simulate, the gray phase diagram of the Bessel Gaussian vortex beam required by the invention is generated in FIG. 2, and the required Bessel Gaussian vortex beam is generated by precisely controlling the phase diagram to be loaded to a liquid crystal spatial light modulator and then passes through a Fourier lens, so that the perfect vortex beam required by the invention can be generated.
Simulation is carried out by using matlab, and fig. 3 is used for generating a gray phase diagram of the abnormal vortex beam required by the invention, and the required abnormal vortex beam is generated by precisely controlling the phase diagram to be loaded into a liquid crystal spatial light modulator. (for example, a vortex beam with a topological charge of 4 is shown).
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (3)
1. A system for transmission under water by interference of radially polarized vortex beams, characterized in that:
the device comprises a vortex beam generating module for generating radial polarized abnormal vortex beams and radial polarized perfect vortex beams, an underwater turbulence environment module for forming different intensity turbulence environments, and an interference pattern receiving module for receiving light intensity information after interference of the two vortex beams;
the vortex beam generation module is sequentially connected with the underwater turbulence environment module and the interference pattern receiving module;
the vortex beam generation module comprises a He-Ne laser (1), a collimation beam expander (2), a first beam splitter (3), a first polarizer (4), a spatial light modulator (5), a first radial polarization converter (7), a reflecting mirror (8), a second polarizer (9), a depolarizing beam splitter (10), a reflection spatial light modulator (11), a second calculator (12), a Fourier lens (13), a second radial polarization converter (14) and a second beam splitter (15);
the output end of the He-Ne laser (1) is connected with the input end of the collimation beam expander (2), and the output end of the collimation beam expander (2) is connected with the input end of the first beam splitter (3); the output end of the first beam splitter (3) is divided into two paths of light beams, one path of the light beams is sequentially connected with the first polarizer (4), the spatial light modulator (5), the first radial polarization converter (7), the reflecting mirror (8) and the second beam splitter (15), and the other path of the light beams is sequentially connected with the second polarizer (9), the depolarizing beam splitter (10), the second radial polarization converter (14) and the second beam splitter (15);
the depolarizing beam splitter (10) is sequentially connected with the Fourier lens (13), the reflective spatial light modulator (11) and the second calculator (12);
the vortex beam generation module further comprises a first calculator (6), wherein the first calculator (6) is connected with the spatial light modulator (5);
the interference pattern receiving module comprises a polaroid (18) for adjusting the polarization angle, a diaphragm (19) for adjusting the size of a light spot and a CCD camera (20);
the input end of the polaroid (18) is connected with the water tank (16), and the output end of the polaroid (18) is sequentially connected with a diaphragm (19) and a CCD camera (20);
after the He-Ne laser (1) outputs a Gaussian beam of a fundamental mode, the Gaussian beam passes through a collimator formed by two convex lenses with coincident focuses, and is split into two beams of light by a beam splitter: one beam is incident to a first polarizer (4), the generated linear polarized light is incident to a pure phase liquid crystal spatial light modulator (5), the linear polarized light is subjected to phase modulation by loading an abnormal vortex light beam gray scale image at a control end of a first calculator (6) to obtain a corresponding abnormal vortex light beam, the abnormal vortex light is incident to a first radial polarization converter (7), and a radial polarization abnormal vortex light beam is generated; the other beam is incident to the second polarizer (9) and then is incident to the depolarizing beam splitter (10) to reach the reflective spatial light modulator (11) to generate Bessel Gaussian vortex beams, the Bessel Gaussian vortex beams pass through the Fourier lens (13) to form perfect vortex beams, and the perfect vortex beams are sequentially incident to the second radial polarization converter (14) to generate radial polarized perfect vortex beams.
2. The system for transmission under water of radially polarized vortex beam interference of claim 1 wherein: the collimation beam expander (2) consists of two convex lenses with coincident focuses.
3. A system for transmission under water of radially polarized vortex beam interference according to claim 1 or 2 wherein:
the turbulent environment module comprises a water tank (16) and a turbulent generator (17); the water tank (16) is connected with the output end of the second beam splitter (15), and the turbulence generator (17) is arranged on the water tank (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210397270.5A CN114785422B (en) | 2022-04-15 | 2022-04-15 | System for radial polarized vortex beam interference is transmitted under water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210397270.5A CN114785422B (en) | 2022-04-15 | 2022-04-15 | System for radial polarized vortex beam interference is transmitted under water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114785422A CN114785422A (en) | 2022-07-22 |
| CN114785422B true CN114785422B (en) | 2024-01-19 |
Family
ID=82429552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210397270.5A Active CN114785422B (en) | 2022-04-15 | 2022-04-15 | System for radial polarized vortex beam interference is transmitted under water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114785422B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115378511A (en) * | 2022-08-26 | 2022-11-22 | 杭州电子科技大学 | Underwater coherent superposition keying method and system combining Rich code and orbital angular momentum |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201033583A (en) * | 2009-03-10 | 2010-09-16 | Univ Nat Cheng Kung | Interferometer and interference method for generating stable vortex beam |
| CN104121996A (en) * | 2014-07-21 | 2014-10-29 | 河南科技大学 | Measuring device for measuring vortex light beam high-order topological charge |
| CN204064471U (en) * | 2014-07-21 | 2014-12-31 | 河南科技大学 | A kind of measurement mechanism measuring vortex beams higher order topology lotus |
| CN105445943A (en) * | 2015-12-24 | 2016-03-30 | 河南科技大学 | Generation device and method of fractional-order perfect vortex beam |
| CN105466577A (en) * | 2016-01-18 | 2016-04-06 | 河南科技大学 | Perfect vortex light beam topological load measurer and method based on light intensity analysis |
| CN205594238U (en) * | 2015-12-24 | 2016-09-21 | 河南科技大学 | Device for generating perfect vortex light beam of fractional order |
| WO2018134799A1 (en) * | 2017-01-23 | 2018-07-26 | University Of The Witwatersrand, Johannesburg | A method and system for hybrid classical-quantum communication |
| CN108702209A (en) * | 2018-05-04 | 2018-10-23 | 东莞理工学院 | OAM Deplexing methods and device based on interference isolation technics |
| CN109767420A (en) * | 2018-11-30 | 2019-05-17 | 西安电子科技大学 | A kind of turbulent flow power determination method based on vortex beams |
| WO2019098262A1 (en) * | 2017-11-16 | 2019-05-23 | 国立大学法人長岡技術科学大学 | Light generation device, exposure device comprising light generation device, exposure system, light generation method, and exposed photoresist production method |
| CN111985320A (en) * | 2020-07-14 | 2020-11-24 | 深圳技术大学 | Multimode vortex beam mode identification system based on feedforward neural network |
| WO2021093259A1 (en) * | 2019-11-14 | 2021-05-20 | 深圳大学 | Arbitrary singularity beam order detection device and method |
| CN114203263A (en) * | 2021-11-19 | 2022-03-18 | 西安理工大学 | Method for calculating blue-green laser scattering characteristics of marine mixed suspended particles |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11614398B2 (en) * | 2019-09-17 | 2023-03-28 | Robert Alfano | Method for imaging biological tissue using polarized majorana vector and complex vortex photons from laser and supercontinuum light sources |
-
2022
- 2022-04-15 CN CN202210397270.5A patent/CN114785422B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201033583A (en) * | 2009-03-10 | 2010-09-16 | Univ Nat Cheng Kung | Interferometer and interference method for generating stable vortex beam |
| CN104121996A (en) * | 2014-07-21 | 2014-10-29 | 河南科技大学 | Measuring device for measuring vortex light beam high-order topological charge |
| CN204064471U (en) * | 2014-07-21 | 2014-12-31 | 河南科技大学 | A kind of measurement mechanism measuring vortex beams higher order topology lotus |
| CN105445943A (en) * | 2015-12-24 | 2016-03-30 | 河南科技大学 | Generation device and method of fractional-order perfect vortex beam |
| CN205594238U (en) * | 2015-12-24 | 2016-09-21 | 河南科技大学 | Device for generating perfect vortex light beam of fractional order |
| CN105466577A (en) * | 2016-01-18 | 2016-04-06 | 河南科技大学 | Perfect vortex light beam topological load measurer and method based on light intensity analysis |
| WO2018134799A1 (en) * | 2017-01-23 | 2018-07-26 | University Of The Witwatersrand, Johannesburg | A method and system for hybrid classical-quantum communication |
| WO2019098262A1 (en) * | 2017-11-16 | 2019-05-23 | 国立大学法人長岡技術科学大学 | Light generation device, exposure device comprising light generation device, exposure system, light generation method, and exposed photoresist production method |
| CN108702209A (en) * | 2018-05-04 | 2018-10-23 | 东莞理工学院 | OAM Deplexing methods and device based on interference isolation technics |
| CN109767420A (en) * | 2018-11-30 | 2019-05-17 | 西安电子科技大学 | A kind of turbulent flow power determination method based on vortex beams |
| WO2021093259A1 (en) * | 2019-11-14 | 2021-05-20 | 深圳大学 | Arbitrary singularity beam order detection device and method |
| CN111985320A (en) * | 2020-07-14 | 2020-11-24 | 深圳技术大学 | Multimode vortex beam mode identification system based on feedforward neural network |
| CN114203263A (en) * | 2021-11-19 | 2022-03-18 | 西安理工大学 | Method for calculating blue-green laser scattering characteristics of marine mixed suspended particles |
Non-Patent Citations (2)
| Title |
|---|
| 《Scattering Fields of shaped beam incidence on a conducting infinite cylinder with dielectric coating》;Mingjun Wang;《2010 International Conference on Microwave and Millimeter Wave Technology》;全文 * |
| 部分相干双涡旋光束在湍流介质中的传输;方桂娟;饶连周;林惠川;邱思杰;;三明学院学报(第06期);第13页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114785422A (en) | 2022-07-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Jolivet et al. | Beam shaping of single-mode and multimode fiber amplifier arrays for propagation through atmospheric turbulence | |
| CN111142266B (en) | Vector light beam generation and dynamic regulation and control device and method | |
| CN109870890B (en) | Integer order vortex light beam phase mask plate with fractional order vortex contour and light path system | |
| CN114785422B (en) | System for radial polarized vortex beam interference is transmitted under water | |
| CN110954213A (en) | Cross-phase-based high-topological-charge-number vortex optical rotation preparation and detection method | |
| CN113625459B (en) | Device and method for generating novel polarization state non-uniform change vector light field | |
| CN114200672B (en) | Synchronous modulation system and method for dynamic light field spatial coherence function and amplitude function | |
| WO2023240741A1 (en) | Method and device for generating full poincare sphere polarized array light beam | |
| CN106444012A (en) | Device and method for high-precision modulation of spatial light amplitudes and phases | |
| Broomfield et al. | Programmable multiple-level phase modulation that uses ferroelectric liquid-crystal spatial light modulators | |
| CN111092653B (en) | Device for realizing dual-polarization Airy obstacle-detouring signal transmission based on single SLM space partition | |
| CN114755836B (en) | Method and device for generating angular polarized light beam and anti-turbulence processing of light beam | |
| CN112327557A (en) | Self-accelerating light generation method and device | |
| Fu et al. | Pre-correction of distorted Bessel–Gauss beams without wavefront detection | |
| Nie et al. | Advanced beam shaping for enhanced underwater wireless optical communication | |
| Weverka et al. | Photorefractive processing for large adaptive phased arrays | |
| Shi et al. | Controllable Self‐Focusing Circular Vortex Pearcey Gaussian Beam with Low Spatial Coherence | |
| Wang et al. | Experimental and theoretical study of linearly polarized Lorentz–Gauss beams with heterogeneous distribution | |
| CN113885219A (en) | System and method for generating polarization transmission invariant light field | |
| CN103676398A (en) | Two-dimensional affine transformation full-gloss implementation method based on diffraction device array | |
| CN114485967A (en) | Method and device for measuring vortex light beam topological load under condition of extremely low coherence | |
| CN116430598A (en) | Array photon orbital angular momentum beam quantum regulation and control system based on phase screen | |
| CN117170116A (en) | Column vector light beam generating system and device based on spatial light modulator screen division multiplexing | |
| CN218958922U (en) | Signal transmitting device | |
| CN108919532B (en) | Laser beam coherence and beam divergence angle composite regulation and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |