CN103713443A - Demodulation device based on orbital angular momentum of light beams - Google Patents
Demodulation device based on orbital angular momentum of light beams Download PDFInfo
- Publication number
- CN103713443A CN103713443A CN201310680948.1A CN201310680948A CN103713443A CN 103713443 A CN103713443 A CN 103713443A CN 201310680948 A CN201310680948 A CN 201310680948A CN 103713443 A CN103713443 A CN 103713443A
- Authority
- CN
- China
- Prior art keywords
- module
- angular momentum
- light beam
- demodulation
- modulation module
- 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.)
- Pending
Links
Images
Landscapes
- Polarising Elements (AREA)
Abstract
The invention relates to devices in the field of photoelectric technologies and in particular relates to a demodulation device based on orbital angular momentum of light beams. The demodulation device comprises a laser, a first modulation module, an angular momentum generation module, a second modulation module and a demodulation module, wherein the laser is used for outputting light beams parallel to each other; the light beams pass through the first modulation module, the angular momentum generation module, the second modulation module and the demodulation module to form a light path; and an interference module, arranged movably and used for generating interference images, is arranged between the demodulation module and the second modulation module. The interference module is used for generating a symmetrical petal interference pattern to obtain a topological charge value and restore phases of the orbital angular momentum by using a light intensity formula; due to quality detection of an interference pattern passing through a polarization analyzer and a light spot pattern not passing through the polarization analyzer, phases near a singular point in an orbital angular momentum mode phase can be restored; demodulation error probability can be reduced; error rate is reduced; and communication reliability is improved.
Description
Technical field
The present invention relates to the device of field of photoelectric technology, more specifically, relate to a kind of based on light beam orbit angular momentum demodulating equipment.
Background technology
Orbital angular momentum pattern is a kind of communication mode with vortex phase factor eim φ, the vortex of phase place makes it have the not available physical characteristic parameter of these other patterns of optical rail angular momentum, in communication and micro-nano photonics field, there are important research and using value, become study hotspot in recent years.
Within 2013, be published in the feasibility that < < Terabit-scale Orbital Angular Momentum Mode Division Multiplexing in Fibers > > on < < Science > > has confirmed orbital angular momentum mode multiplexing.Deviser has designed and has supported two orbital angular momentum patterns multiplexing on ten wavelength, can transmit 1.1km, and bandwidth reaches the special fiber of 1.6Tbps, and it provides theory and experimental basis for the application of orbital angular momentum pattern in the communication technology, has important value.Orbital angular momentum pattern, except conventional modulation system, can also utilize its orbital angular momentum as parameter, to carry out coded message with topological charge, can improve message capacity and bandwidth.But detection and recovery how to orbital angular momentum pattern phase place, realize the demodulation to orbital angular momentum pattern, be to need now a technical matters solving.
Direct detection for light wave generally only limits to the measurement to light intensity, and phase place cannot obtain by measuring directly, thereby conventionally adopts and introduce the method that reference light is interfered, and obtains the PHASE DISTRIBUTION of measured light beam from interference pattern.The < < Phase-shift interference-based wavefront characterization for orbital angular momentum modes > > being published in for 2013 on < < Optics Letters > > has proposed by reference light and the orbital angular momentum pattern of two phase differential pi/2s, to interfere respectively, obtain two interference patterns, by these two interference patterns, recover orbital angular momentum pattern phase place, but near the singular point of center, in a larger panel region, phase place is fuzzy, near singular point, phase information does not fully recover, incomplete for the demodulation of orbital angular momentum pattern, this has caused increasing and has demodulated wrong possible surname, increased the bit error rate, reduced the reliability of communication.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of based on light beam orbit angular momentum demodulating equipment, can recover near the phase place singular point in orbital angular momentum pattern phase place, reduced and demodulated wrong possibility, reduced the bit error rate, the reliability that has improved communication, has certain realistic meaning.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
Provide a kind of based on light beam orbit angular momentum demodulating equipment, comprise laser instrument, the first modulation module, angular momentum generation module, the second modulation module, demodulation module, the light beam that described laser instrument output is parallel to each other, described light beam forms light path through the first modulation module, angular momentum generation module, the second modulation module, demodulation module successively, is provided with the intervention module for generation of interference image of movable placement between described demodulation module and the second modulation module.
The present invention is based on light beam orbit angular momentum demodulating equipment and be provided with the intervention module for generation of interference image of movable placement, concrete, comprise laser instrument, the first modulation module, angular momentum generation module, the second modulation module, demodulation module, between described demodulation module and the second modulation module, be provided with the intervention module for generation of interference image of movable placement.The setting of intervention module is in order to generate symmetrical petal-shaped interference pattern, to obtain the size of topological charge, to utilize formula to carry out phase bit recovery to orbital angular momentum.
One of improve, described intervention module is for making the two-beam that meets interference condition of angular momentum generation module generation produce the analyzer of interference image.
Preferably, the first modulation module that the described light beam that light laser is sent is modulated comprises the object lens that are arranged in order, little aperture apparatus, lens, diaphragm, the first polaroid, and the light beam that laser instrument sends can pass through aperture, lens, diaphragm and first polaroid of object lens, little aperture apparatus successively.Laser instrument can be exported the light beam being parallel to each other; Object lens are assembled all light beams of laser instrument output; Little aperture apparatus is positioned on the back focal plane of object lens, is positioned on the front focal plane of lens simultaneously, and little aperture apparatus carries out the filtration of light wave, and lens are launched beam collimation; Diaphragm is between the back focal plane and the first polaroid of lens, and diaphragm is used for obtaining the good light beam of quality; The first polaroid is used for adjusting polarized state of light, reaches best phase-modulation.
Further, described angular momentum generation module comprises polarization beam apparatus, the beam splitter that can form optical interference circuit and reference path, described optical interference circuit is provided with vortex phase-plate, and optical interference circuit and reference path are respectively equipped with first and second catoptron that can make optical interference circuit and reference path converge, beam splitter is positioned at the position that optical interference circuit and reference path converge.。
Preferably, described the second modulation module is λ/4 wave plate (λ is wavelength).λ/4 wave plate be provided for adjusting polarized state of light, reach best phase-modulation.
Alternatively, described demodulation module is beam quality analysis instrument.Beam quality analysis instrument be provided for detecting final measurement.
The concrete applying step that the present invention is based on light beam orbit angular momentum demodulating equipment is as follows:
A. the light beam that first laser instrument output is parallel to each other, through object lens, focus on the back focal plane of object lens, regulate little aperture apparatus to object focal point place, light beam is filtered, light beam after filtration is through the beams extended by lens collimation, through diaphragm, obtain higher this plane light wave of desirable line, higher this plane light wave of line is adjusted light wave polarization direction by the first polaroid, and polarization beam apparatus can be divided equally light beam isocandela; Light beam incident will be divided into the two orthogonal vertical curve polarisation in the bundle direction of propagation and horizontal line polarisations after regulating polarization beam apparatus;
B. vertical curve polarisation step a being obtained or horizontal line polarisation produce with the orbital angular momentum diffusing information through vortex phase-plate, through the first catoptron reflection; The horizontal line polarisation of answering in contrast or vertical curve polarisation, as with reference to light, reflect through the second catoptron; Two bunch polarisations after described reflection converge at beam splitter place, launch directional light;
C. directional light step b being obtained is the wave plate adjustment light wave polarization direction, λ/4 of 45 ° through too fast axle and horizontal direction angle, forms the hot spot pattern of left and right rotatory polarization stack;
D. left and right rotatory polarization step c being obtained, by the analyzer arranging, produces symmetrical petal-shaped interference pattern;
E. the left and right rotatory polarization respectively step c being obtained is through the interference pattern of steps d and through the rotatory polarization of steps d, do not store and detect information processing; Utilize formula I=I
0cos
2(m φ/2+ θ) demodulates the phase place m φ of orbital angular momentum pattern, wherein I is the light intensity of the interference pattern through steps d, I0 is the light intensity of the hot spot pattern of the left and right rotatory polarization stack for through step c, m is topological charge, φ is the position angle on interference plane, and θ is the angle of analyzer and horizontal direction.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is based on light beam orbit angular momentum demodulating equipment, laser instrument, the first modulation module, angular momentum generation module, the second modulation module, demodulation module are set, the light beam that described laser instrument output is parallel to each other, described light beam forms light path through the first modulation module, angular momentum generation module, the second modulation module, demodulation module successively, is provided with the intervention module for generation of interference image of movable placement between described demodulation module and the second modulation module.The setting of intervention module is in order to generate symmetrical petal-shaped interference pattern, to obtain the size of topological charge, to utilize formula to carry out phase bit recovery to orbital angular momentum.The present invention is by through the interference pattern of analyzer with without quality testing and the processing of the hot spot pattern of analyzer, can recover near the phase place singular point in orbital angular momentum pattern phase place, reduced and demodulated wrong possibility, reduced the bit error rate, improved the reliability of communication, and the present invention is reasonable in design, simple in structure, cost is low, easy to use.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1 based on light beam orbit angular momentum demodulating equipment.
Fig. 2 is that embodiment 1 phase place restoration result contrasts schematic diagram with analog result.
Fig. 3 is that embodiment 2 phase place restoration results contrast schematic diagram with analog result.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.Wherein, accompanying drawing is only for exemplary illustration, expression be only schematic diagram, but not pictorial diagram can not be interpreted as the restriction to this patent; For embodiments of the invention are described better, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product; For a person skilled in the art, in accompanying drawing some known configurations and explanation thereof may to omit be understandable.
The corresponding same or analogous parts of same or analogous label in the accompanying drawing of the embodiment of the present invention, in description of the invention, it will be appreciated that, if have term " on ", D score, " left side ", orientation or the position relationship of indications such as " right sides " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore the term of describing position relationship in accompanying drawing is only for exemplary illustration, can not be interpreted as the restriction to this patent, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
Embodiment 1
As Fig. 1 to 2 is depicted as the first embodiment that the present invention is based on light beam orbit angular momentum demodulating equipment, based on light beam orbit angular momentum demodulating equipment, comprise laser instrument 1, the first modulation module 2, angular momentum generation module 3, the second modulation module 4, demodulation module 5, the light beam that laser instrument 1 output is parallel to each other, light beam forms light path through the first modulation module 2, angular momentum generation module 3, the second modulation module 4, demodulation module 5 successively, is provided with the intervention module 6 for generation of interference image of movable placement between demodulation module 5 and the second modulation module 4.Particularly, the first modulation module 2 that the light beam that light laser 1 is sent is modulated comprises object lens 21, aperture device 22, lens 23, diaphragm 24, the first polaroid 25 being arranged in order, and the light beam that laser instrument 1 sends can pass through aperture, lens 23, diaphragm 24 and first polaroid 25 of object lens 21, aperture device 22 successively.Laser instrument 1 can be exported the light beam being parallel to each other; Object lens 21 are assembled all light beams of laser instrument 11 outputs; Aperture device 22 is positioned on the back focal plane of object lens 21, is positioned on the front focal plane of lens 23 simultaneously, and aperture device 22 carries out the filtration of light wave, and lens 23 are launched beam collimation; Diaphragm 24 is between the back focal plane and the first polaroid 25 of lens 23, and diaphragm 24 is for obtaining the good light beam of quality; The first polaroid 25, for adjusting polarized state of light, reaches best phase-modulation.In addition, angular momentum generation module 3 comprises polarization beam apparatus 31, the beam splitter 33 that can form optical interference circuit and reference path, optical interference circuit is provided with vortex phase-plate 311, and optical interference circuit and reference path are respectively equipped with the first catoptron 312, second catoptron 321 that can make optical interference circuit and reference path converge, beam splitter 33 is positioned at the position that optical interference circuit and reference path converge.In the present embodiment, the first polaroid 25 is λ/2 wave plate.
Wherein, the second modulation module 4 is λ/4 wave plate, and λ/4 wave plate is used for adjusting polarized state of light, reaches best phase-modulation.Intervention module 6 is analyzer, the two-beam generation interference image that meets interference condition that analyzer rotates a certain angle and can make angular momentum generation module 3 produce.Demodulation module 5 is beam quality analysis instrument, and beam quality analysis instrument is for detection of final measurement.
Applying step concrete in the present embodiment is as follows:
A. the light beam that first laser instrument 1 output is parallel to each other, through object lens 21, focus on the back focal plane of object lens 21, regulate aperture device 22 to object lens 21 focus places, light beam is filtered, light beam after filtration is through lens 23 beam-expanding collimations, through diaphragm 24, obtain higher this plane light wave of desirable line, higher this plane light wave of line is adjusted light wave polarization direction by the first polaroid 25, and polarization beam apparatus 31 can be divided equally light beam isocandela; Light beam incident will be divided into the two orthogonal vertical curve polarisation in the bundle direction of propagation and horizontal line polarisations after regulating polarization beam apparatus 31;
B. vertical curve polarisation step a being obtained or horizontal line polarisation produce with the orbital angular momentum diffusing information through vortex phase-plate 311, through the first catoptron 312 reflections; The horizontal line polarisation of answering in contrast or vertical curve polarisation, as with reference to light, reflect through the second catoptron 321; Two bunch polarisations after described reflection converge at beam splitter 33 places, launch directional light;
C. directional light step b being obtained is the wave plate adjustment light wave polarization direction, λ/4 of 45 ° through too fast axle and horizontal direction angle, forms the hot spot pattern of left and right rotatory polarization stack;
D. left and right rotatory polarization step c being obtained, by the analyzer arranging, produces symmetrical petal-shaped interference pattern;
E. the left and right rotatory polarization respectively step c being obtained is through the interference pattern of steps d and through the rotatory polarization of steps d, do not store and detect information processing; Utilize formula I=I
0cos
2(m φ/2+ θ) demodulates the phase place m φ of orbital angular momentum pattern, and wherein I is the light intensity of the interference pattern through steps d, I
0for the light intensity of the hot spot pattern of the left and right rotatory polarization stack for through step c, m is topological charge, and φ is the position angle on interference plane, and θ is the angle of analyzer and horizontal direction.In the present embodiment, topological charge value m is 4.
Embodiment 2
Be illustrated in figure 3 the second embodiment that the present invention is based on light beam orbit angular momentum demodulating equipment and application process thereof, the present embodiment and embodiment mono-are similar, and institute's difference is, in the present embodiment, topological charge value m is 8.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.All any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in the protection domain of the claims in the present invention.
Claims (6)
1. one kind based on light beam orbit angular momentum demodulating equipment, comprise laser instrument (1), the first modulation module (2), angular momentum generation module (3), the second modulation module (4), demodulation module (5), it is characterized in that, between described demodulation module (5) and the second modulation module (4), be provided with adjustable intervention module for generation of interference image (6), the light beam that laser instrument (1) sends can be successively through the first modulation module (2), angular momentum generation module (3), the second modulation module (4), intervention module (6) and demodulation module (5).
2. according to claim 1ly based on light beam orbit angular momentum demodulating equipment, it is characterized in that, described intervention module (6) is for making the two-beam that meets interference condition that angular momentum generation module (3) produces produce the analyzer of interference image.
3. according to claim 2 based on light beam orbit angular momentum demodulating equipment, it is characterized in that, described the first modulation module (2) comprises the object lens (21) that are arranged in order, little aperture apparatus (22), lens (23), diaphragm (24), the first polaroid (25), and the light beam that laser instrument (1) sends can pass through aperture, lens (23), diaphragm (24) and first polaroid (25) of object lens (21), little aperture apparatus (22) successively.
4. according to claim 3 based on light beam orbit angular momentum demodulating equipment, it is characterized in that, described angular momentum generation module (3) comprises polarization beam apparatus (31), the beam splitter (33) that can form optical interference circuit and reference path, described optical interference circuit is provided with vortex phase-plate (311), and optical interference circuit and reference path are respectively equipped with first and second catoptron (312,321) that can make optical interference circuit and reference path converge, beam splitter (33) is positioned at the position that optical interference circuit and reference path converge.
According to right want described in 1 to 4 any one based on light beam orbit angular momentum demodulating equipment, it is characterized in that, described the second modulation module (4) is λ/4 wave plate (λ is wavelength).
According to described in claim 1 to 4 any one based on light beam orbit angular momentum demodulating equipment, it is characterized in that, described demodulation module (5) is beam quality analysis instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310680948.1A CN103713443A (en) | 2013-12-13 | 2013-12-13 | Demodulation device based on orbital angular momentum of light beams |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310680948.1A CN103713443A (en) | 2013-12-13 | 2013-12-13 | Demodulation device based on orbital angular momentum of light beams |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103713443A true CN103713443A (en) | 2014-04-09 |
Family
ID=50406530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310680948.1A Pending CN103713443A (en) | 2013-12-13 | 2013-12-13 | Demodulation device based on orbital angular momentum of light beams |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103713443A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104601214A (en) * | 2014-12-30 | 2015-05-06 | 浙江大学 | Sampling receiving method for demultiplexing RF track angular momentum mode |
| CN104764474A (en) * | 2015-03-10 | 2015-07-08 | 清华大学 | Optical fiber sensor based on beam orbital angular momentum |
| CN104833314A (en) * | 2015-06-03 | 2015-08-12 | 中国科学技术大学 | High-resolution optical fiber strain sensor and measuring method |
| CN105388635A (en) * | 2015-10-16 | 2016-03-09 | 南京邮电大学 | Non-damage separating method and separating subsystems of random multiplex rail angular momentum states |
| CN105698942A (en) * | 2016-03-11 | 2016-06-22 | 中国科学技术大学 | Photon orbit angular momentum-based high-precision wavemeter |
| CN106506089A (en) * | 2016-11-25 | 2017-03-15 | 深圳大学 | A kind of optical rail angular momentum signal demodulating equipment and method |
| CN106788745A (en) * | 2016-11-25 | 2017-05-31 | 深圳大学 | A kind of orbital angular momentum be concerned with demultiplexing device and separation detection method |
| CN108900275A (en) * | 2018-06-29 | 2018-11-27 | 深圳市深光谷科技有限公司 | Space division multiplexing communication system and the method and system for demultiplexing CVB channel |
| WO2019204960A1 (en) * | 2018-04-23 | 2019-10-31 | 中山大学 | Method and system for measuring photon orbital angular momentum mode based on spiral transformation |
| CN110402375A (en) * | 2018-11-05 | 2019-11-01 | 东莞理工学院 | OAM mode demodulating system based on mode conversion |
| WO2020135787A1 (en) * | 2018-12-29 | 2020-07-02 | 华南师范大学 | Orbital angular momentum generating apparatus and method for polarization modulation of orbital angular momentum |
| CN112326024A (en) * | 2020-09-25 | 2021-02-05 | 山东师范大学 | Device and method for simultaneously measuring topological load size, positive load size and negative load size of vortex light beam |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587281A (en) * | 2009-06-18 | 2009-11-25 | 北京理工大学 | Realize the method and apparatus of demodulation of mixing auger phase light beam orbit angular momentum state |
| CN102141690A (en) * | 2011-05-05 | 2011-08-03 | 西北工业大学 | Spiral phase plate with adjustable parameters |
| CN102269876A (en) * | 2011-08-22 | 2011-12-07 | 北京理工大学 | System for generating vector beam by using Wollaston prism combined beam |
-
2013
- 2013-12-13 CN CN201310680948.1A patent/CN103713443A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101587281A (en) * | 2009-06-18 | 2009-11-25 | 北京理工大学 | Realize the method and apparatus of demodulation of mixing auger phase light beam orbit angular momentum state |
| CN102141690A (en) * | 2011-05-05 | 2011-08-03 | 西北工业大学 | Spiral phase plate with adjustable parameters |
| CN102269876A (en) * | 2011-08-22 | 2011-12-07 | 北京理工大学 | System for generating vector beam by using Wollaston prism combined beam |
Non-Patent Citations (3)
| Title |
|---|
| 刘曼，陈小艺，李海霞等: "利用干涉光场的相位涡旋测量拉盖尔-高斯光束的轨道角动量", 《物理学报》 * |
| 刘辉, 陈子阳, 蒲继雄: "涡旋光束的轨道角动量的测量", 《华侨大学学报（自然科学版）》 * |
| 李阳月，陈子阳，刘辉等: "涡旋光束的产生与干涉", 《物理学报》 * |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104601214A (en) * | 2014-12-30 | 2015-05-06 | 浙江大学 | Sampling receiving method for demultiplexing RF track angular momentum mode |
| CN104601214B (en) * | 2014-12-30 | 2017-10-13 | 浙江大学 | A kind of sampling method of reseptance demultiplexed for radio frequency orbital angular momentum pattern |
| CN104764474A (en) * | 2015-03-10 | 2015-07-08 | 清华大学 | Optical fiber sensor based on beam orbital angular momentum |
| CN104764474B (en) * | 2015-03-10 | 2018-01-12 | 清华大学 | Fibre optical sensor based on light beam orbit angular momentum |
| CN104833314A (en) * | 2015-06-03 | 2015-08-12 | 中国科学技术大学 | High-resolution optical fiber strain sensor and measuring method |
| CN105388635A (en) * | 2015-10-16 | 2016-03-09 | 南京邮电大学 | Non-damage separating method and separating subsystems of random multiplex rail angular momentum states |
| CN105388635B (en) * | 2015-10-16 | 2019-01-11 | 南京邮电大学 | The non-demolition separation method and its isolated subsystem of any multiplexing orbit angular momentum state |
| CN105698942A (en) * | 2016-03-11 | 2016-06-22 | 中国科学技术大学 | Photon orbit angular momentum-based high-precision wavemeter |
| CN105698942B (en) * | 2016-03-11 | 2019-06-21 | 中国科学技术大学 | It is a kind of based on the high-accuracy wavelength of photon trajectory angular momentum |
| CN106788745B (en) * | 2016-11-25 | 2018-12-25 | 深圳大学 | A kind of method of the device and separation detection of the relevant demultiplexing of orbital angular momentum |
| CN106788745A (en) * | 2016-11-25 | 2017-05-31 | 深圳大学 | A kind of orbital angular momentum be concerned with demultiplexing device and separation detection method |
| CN106506089B (en) * | 2016-11-25 | 2019-02-12 | 深圳大学 | A kind of optical rail angular momentum signal demodulating equipment and method |
| CN106506089A (en) * | 2016-11-25 | 2017-03-15 | 深圳大学 | A kind of optical rail angular momentum signal demodulating equipment and method |
| WO2019204960A1 (en) * | 2018-04-23 | 2019-10-31 | 中山大学 | Method and system for measuring photon orbital angular momentum mode based on spiral transformation |
| US10962409B2 (en) | 2018-04-23 | 2021-03-30 | Sun Yat-Sen University | Method and system for measuring orbital angular momentum modes of photons based on spiral transformation |
| CN108900275A (en) * | 2018-06-29 | 2018-11-27 | 深圳市深光谷科技有限公司 | Space division multiplexing communication system and the method and system for demultiplexing CVB channel |
| CN110402375A (en) * | 2018-11-05 | 2019-11-01 | 东莞理工学院 | OAM mode demodulating system based on mode conversion |
| WO2020135787A1 (en) * | 2018-12-29 | 2020-07-02 | 华南师范大学 | Orbital angular momentum generating apparatus and method for polarization modulation of orbital angular momentum |
| CN112326024A (en) * | 2020-09-25 | 2021-02-05 | 山东师范大学 | Device and method for simultaneously measuring topological load size, positive load size and negative load size of vortex light beam |
| CN112326024B (en) * | 2020-09-25 | 2022-07-22 | 山东师范大学 | Device and method for simultaneously measuring topological load size and positive and negative of vortex light beam |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103713443A (en) | Demodulation device based on orbital angular momentum of light beams | |
| CN103777206B (en) | A kind of single pixel imaging system based on polarization relevance imaging | |
| CN105136289B (en) | A kind of composite grating and measuring method for being used to detect multiplexing vortex beams | |
| US10962409B2 (en) | Method and system for measuring orbital angular momentum modes of photons based on spiral transformation | |
| CN102175594B (en) | Device for measuring damage threshold under combined action of three-wavelength pulse laser and debugging method | |
| US20160028479A1 (en) | Adaptive Optics Based Simultaneous Turbulence Compensation of Multiple Orbital Angular Momentum Beams | |
| CN102721477B (en) | Off-focus value measuring method for phase diversity wavefront sensor | |
| CN108712216A (en) | Space phase compensation system in orbital angular momentum optic communication and its method | |
| CN103245285B (en) | A kind of reflection type point diffraction carrier synchronization movable phase interfere pick-up unit and detection method | |
| CN102865811B (en) | Orthogonal double grating based synchronous phase shifting common-path interference microscopy detection device and detection method | |
| CN204228121U (en) | A kind of ellipsoidal mirror surface shape detection apparatus | |
| CN104034257A (en) | Device and method for measuring synchronous phase shifting interference of Fizeau quasi-common optical path structure | |
| CN105388635B (en) | The non-demolition separation method and its isolated subsystem of any multiplexing orbit angular momentum state | |
| WO2017009808A2 (en) | Free space optical communication system, apparatus and a method thereof | |
| CN103557948B (en) | Based on optical system Wavefront measuring apparatus and the method for circle carrier phase demodulation method | |
| CN104345577B (en) | Alignment device | |
| CN202748541U (en) | Device for generating random vectorial field on basis of trapezoidal Sagnac interferometer | |
| CN106767389A (en) | Striking rope type simultaneous phase-shifting interference testing device based on prismatic decomposition phase shift | |
| CN208723908U (en) | A kind of space phase compensation device in orbital angular momentum optic communication | |
| CN104535188A (en) | Static full-polarization imaging detection system and method for spatial frequency modulation | |
| CN103227408B (en) | Based on beam array phase control system and the method for leggy disturbance | |
| CN102967379B (en) | Wavefront sensor used for solar self-adaptive optical system | |
| CN102289081B (en) | Method and device for generating azimuthally polarized beam | |
| CN102914259A (en) | Interference detection device based on light-splitting synchronous phase shifting and detection method | |
| CN104020526B (en) | A kind of fiber mode multiplexing supporting palarization multiplexing and Deplexing apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140409 |
|
| RJ01 | Rejection of invention patent application after publication |