CN108061975A - A kind of method and device for efficiently generating arbitrary vectorial field - Google Patents
A kind of method and device for efficiently generating arbitrary vectorial field Download PDFInfo
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- CN108061975A CN108061975A CN201711282128.1A CN201711282128A CN108061975A CN 108061975 A CN108061975 A CN 108061975A CN 201711282128 A CN201711282128 A CN 201711282128A CN 108061975 A CN108061975 A CN 108061975A
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- 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
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention belongs to photoelectron technical fields, are related to a kind of method and device that arbitrary vectorial field is efficiently generated using phase type spatial light modulator (SLM), it is characterised in that：A beam splitter system is introduced on the output shaft of light source, obtain two beam orhtogonal linear polarizaiton light, by the light beam regulator control system comprising phase type spatial light modulator (SLM) two light beams is made to load different phase informations, beam system Coaxial Superimposed is closed by light beam again, and pass through quarter-wave plate and be converted into left-right rotary circularly polarized light beam, superposition generation vectorial field.The beam splitter system of use is closed in beam system, and used device is high to the transmitance of incident light, loss is low.Amplitude, phase and the polarization state of generated vectorial field can be adjusted in real time by loading different phase diagrams on phase type spatial light modulator (SLM).Device proposed by the invention, energy loss is small, and the alignment of beam combination is adjusted easily, can conveniently and efficiently generate arbitrary vectorial field.
Description
Technical field
The present invention relates to it is a kind of using phase type spatial light modulator (SLM) efficiently generate arbitrary vectorial field method and
Device belongs to photoelectron technical field.
Background technology
Scalar field refers to polarization state in the equally distributed light field of horizontal space, such as linear polarization, circular polarization, elliptically polarized light
Etc..Different from scalar field, vectorial field refers to light field of the polarization state with horizontal space change in location.Wherein, most typically, should
With being most widely vectorial field --- column symmetry vectorial field that polarization state is axisymmetricly distributed in horizontal space.Research hair
It is existing, when column symmetry vectorial field is through high numerical aperture lens tightly focused, it can generate with novel angular momentum and intensity distribution
Jiao Chang, such as laser accunputure, light cage, light chain.The tightly focused characteristic of vectorial field uniqueness makes it in particle capture, super-resolution imaging, light
It learns and has broad application prospects in micro- manipulation, material processing and other fields.
At present, the production method of vectorial field is one of research hotspot both domestic and external.It usually can be by the generation of vectorial field
Method is divided into two class of active method and passive means.So-called active method is the resonator by designing laser, direct output vector light
Beam.So-called passive means is to be inserted into certain device in light path outside laser to change the polarization state of Laser Output Beam, so as to
Generate vectorial field.Though active method can more efficiently generate vectorial field, lack flexibility.After resonator is specially designed only
The vectorial field of special polarization state distribution can be generated.In contrast, passive means can more easily generate various different polarization states point
The vectorial field of cloth.Passive means can be divided into direct method and indirect method：Direct method is the optical element by special designing, such as sub-
The linearly polarized light beam that laser exports is converted into vector light by wave length grating, phase light element, super surface, liquid crystal etc.
Beam；Indirect rule mainly forms vectorial field by multiple beam by Coaxial Superimposed, therefore also known as interferometry.
When generating vectorial field using interferometry, generally pass through the mutually orthogonal linearly polarized light of two beams or oppositely oriented circle
Polarize optical superposition.To realize different polarization states distribution, it usually needs realized using spatial light modulator (SLM) to different polarization point
The phase-modulation of amount.This so that vector beam is controllable in real time, has very high flexibility, can easily generate random polarization state
The vectorial field of distribution.However, when generating vectorial field by conventional interference method, before two polarized component Coaxial Superimposeds are ensured
It puts, used beam splitting, bundling device part can generate multiple diffraction times or can lose substantial amounts of light energy.This is to being produced
The energy of raw vectorial field causes to waste, and generation efficiency is relatively low, and light beam Coaxial Superimposed adjusting difficulty is big.In order to flexible, efficient
Ground generates vectorial field, and present invention proposition is a kind of efficiently to generate arbitrary vectorial field using phase type spatial light modulator (SLM)
Method and device.
The content of the invention
Technical problems to be solved
In view of the deficiencies of the prior art, the present invention proposes a kind of high using phase type spatial light modulator (SLM)
Effect generates the method and device of arbitrary vectorial field.The method and device load different phases by using phase type SLM
Figure is, it can be achieved that the real-time adjusting of the amplitude of vectorial field, phase and polarization state；Used beam splitting, the intensity of conjunction beam system are saturating
Rate height is crossed, energy loss is small, and the alignment adjusting of beam combination is easier.
Technical solution
The technical solution adopted in the present invention, it is characterised in that including light source 1, half-wave plate 2, beam splitter system 3, light beam
Regulator control system 4, light beam close beam system 5, quarter-wave plate 6, charge coupled cell 7.
The light source 1 is single-mode laser, including He-Ne laser, argon ion laser, semiconductor laser and femtosecond
Pulse laser etc..
The half-wave plate 2, effect are to change the polarization direction of laser polarization light output beam, make it along 45 ° of directions
Polarization.
The beam splitter system 3 and the light beam close one kind that following four scheme may be employed in beam system 5：
Scheme one：The beam splitter system 3, including polarization splitting prism 8, speculum 9, speculum 10：Polarization spectro
Prism 8, speculum 9 and speculum 10 form triangle interferometer I, and effect is that incident beam is divided into orthogonal two in polarization direction
Bunch light beam, two light beams are separated and are mutually parallel, can by adjust the angle of either mirror to the spacing of two light beams into
Row adjustment.The light beam, which closes beam system 5, includes polarization splitting prism 14, speculum 15 and the composition triangle interferometer of speculum 16
II, effect is to make the polarization direction exported through light beam regulator control system 4 orthogonal and two bunch polarised lights of parallel transmission are coaxial
Superposition.Scheme two：The beam splitter system 3 is made of beam deviation device 17, and effect is that incident beam is divided into two beams to put down
The orhtogonal linear polarizaiton light beam of row transmission.The light beam closes beam system 5 and is made of beam deviation device 18, and effect is made through light beam tune
Two polarization directions that control system 4 is exported are orthogonal and two bunch polarised lights of parallel transmission coaxially close beam.Scheme three：The light beam
Divided beam system 3 and light beam close beam system 5 and are made of respectively triangle interferometer I and beam deviation device 18.
Scheme four：The beam splitter system 3 and light beam close beam system 5 respectively by beam deviation device 17 and triangle interferometer
II is formed.
It should be noted that：More than beam splitting employed in four kinds of schemes, close beam system inputs light beam be respectively provided with
Very high intensity transmitance, loss are extremely low.Arbitrary vectorial field can be efficiently generated using any of the above-described kind of scheme.
The light beam regulator control system 4 includes right-angle reflecting prism 11, half-wave plate 12, phase type spatial light modulator (SLM)
13.According to the difference of the placement location of half-wave plate 12, one kind of following two schemes may be employed in the light beam regulator control system 4：
Scheme one：The light beam regulator control system 4 includes right-angle reflecting prism 11, half-wave plate 12, the light modulation of phase type space
Device (SLM) 13.The effect of the right-angle reflecting prism 11 is that its one side first projects two beam orhtogonal linear polarizaiton light beams point respectively
The left and right half part of the SLM of screen, opposite side reflect the light onto light beam and close beam system 5；Since SLM is only to horizontal polarization light beam
Response, therefore, the left-half that half-wave plate 12 is close to SLM are placed, and effect is to switch to the light beam for inciding into SLM left-halfs
Horizontal polarization, and when this light beam is exported from SLM, again passes by half-wave plate 12, change is back to vertical polarization；The light modulation of phase type space
The left and right half part of device (SLM) 13 loads different phase diagrams, and effect is that out of phase is attached to two beam crossed polarized lights
Shu Zhong.
Scheme two：Half-wave plate 12 may also placed between SLM and right-angle reflecting prism 11 in this scheme, effect be make into
The change of polarized direction for the vertical light beam penetrated is horizontal polarization so that SLM is responsed to which；Make what another beam was emitted by SLM
The change of polarized direction of horizontal polarization light beam is vertical polarization, ensures to be incident to the polarization side for two light beams that light beam closes beam system 5
To orthogonal.
The effect of the quarter-wave plate 6 is that the two bunch polarised lights for making polarization direction orthogonal are converted into two beam rotation direction phases
Anti- circularly polarized light.
The effect of the charge coupled cell 7 is the intensity distribution of vectorial field caused by detection.
Description of the drawings
Attached drawing 1 is light channel structure schematic diagram of the invention.In figure, 1- light sources, 2- half-wave plates, 3- beam splitter systems, 4-
Light beam regulator control system, 5- light beams close beam system：11- right-angle reflecting prisms, 12- half-wave plates, 13- phase type spatial light modulators
(SLM), 6- quarter-wave plates, 7- charge coupled cells.
Attached drawing 2 is the schematic diagram that may make up beam splitter system 3 in attached drawing 1 of the present invention.In Fig. 2 (a), 8- polarization spectro ribs
Mirror, 9,10- speculums are schemed in (b), 17- beam deviation devices.
Attached drawing 3 is that may make up the schematic diagram that light beam closes beam system 5 in attached drawing 1 of the present invention；Scheme in (a), 14- polarization spectro ribs
Mirror, 15,16- speculums are schemed in (b), 18- beam deviation devices.
Attached drawing 4 is the schematic diagram that 4 scheme two of light beam regulator control system is formed in attached drawing 1 of the present invention.
The experimental result picture for the second order radial vector light field that attached drawing 5 is generated for the present invention using Fig. 1 devices.In figure, first
Row is respectively the phase diagram of the left and right half part loadings of SLM, and second row is followed successively by from left to right to be not added with analyzer, adds in along 0 ° of inspection
Partially, the experimental result picture gathered along charge coupled cell during 90 ° of analyzings.
The experiment knot for the radial vector light field for carrying single order helical phase that attached drawing 6 is generated for the present invention using Fig. 1 devices
Fruit is schemed.In figure, the first row is respectively the phase diagram of the left and right half part loadings of SLM, and the second row is followed successively by from left to right is not added with analyzing
Device is added in along 0 ° of analyzing, the experimental result picture gathered along charge coupled cell during 90 ° of analyzings, and the third line is the single order spiral shell generated
Revolve the result figure of phase.
Specific embodiment
In conjunction with embodiment, attached drawing, the invention will be further described：It is proposed of the embodiment of the present invention efficiently generates arbitrary arrow
The device for measuring light field is as shown in Figure 1.
Linearly polarized light beam is sent by light source 1, the light beam along 45 ° of direction polarizations is converted into after half-wave plate 2, by beam splitter
System 3 is divided to for the mutually orthogonal linearly polarized light of two beams, is loaded out of phase information by light beam regulator control system 4, then is closed through light beam
Beam system 5 coaxially closes beam, is separately converted to left and right rounding light beam through quarter-wave plate 6, generates vectorial field.Finally
The intensity distribution of formed vectorial field is detected by charge coupled cell 7.
Embodiment 1
When the two additional phases of beam circularly polarized light are respectively：(For the polarizing angle of cylindrical coordinate, m is to open up
Flutter charge values),(For the phase difference of two divided beams), then the polarization state of the column vector beam formed is
For example, to generate Second Order Vector light field, then haveIt is loaded on SLM
Phase diagram is as shown in Fig. 5 the first rows.As the experimental result of this method acquisition as shown in the second rows of Fig. 5.Analyzing the results show is produced
Raw light field is Second Order Vector light field.
Embodiment 2
Work as δ1And δ2With different additional phase shifts, A represents the amplitude of two light beams, then the light field being superimposed is expressed as
Above formula can represent to attached the arbitrary linear polarization vector beam of arbitrary phase distribution, and the phase of vector beam depends on
In δ1+δ2, the polarization direction of vector beam depends on δ1-δ2。
For example, to generate the radial vector light field for carrying single order helical phase, then have
So, can obtainδ2=0.The phase diagram loaded on SLM is as shown in Fig. 6 the first rows.It is obtained by this method
Experimental result as shown in Fig. 6 second and third row.Experimental result show caused by light field be radial vector light field, and carry
Single order helical phase.
Claims (8)
1. a kind of method and device that arbitrary vectorial field is efficiently generated using phase type spatial light modulator (SLM), feature
It is：The linearly polarized light beam sent by light source (1), by half-wave plate (2), the polarization side of change laser polarization light output beam
To it is made to be polarized along 45 ° of directions；Into after beam splitter system (3), incident beam is divided into two orthogonal bunch of polarization direction
Polarised light；Two light beams load different phase informations with the parallel light beam regulator control system (4) that incides into of a determining deviation, pass through light beam
Beam system (5) Coaxial Superimposed is closed, then left-right rotary circularly polarized light beam is converted by quarter-wave plate (6), generates vectorial field；Most
Afterwards, the vectorial field as caused by charge coupled cell (7) detection.
2. the apparatus according to claim 1, it is characterised in that：The light source (1) is single-mode laser, including He-Ne Lasers
Device, argon ion laser, semiconductor laser and femtosecond pulse laser etc..
3. the apparatus according to claim 1, it is characterised in that：The beam splitter system (3) for shown in Fig. 2 (a) by
The triangle interferometer I or be the light beam shown in Fig. 2 (b) that polarization splitting prism (8), speculum (9) and speculum (10) form
Deviator (17), effect are that incident beam is divided into polarization direction is orthogonal and two bunch polarised lights of parallel transmission.
4. the apparatus according to claim 1, it is characterised in that：The light beam close beam system (5) for shown in Fig. 3 (a) by
The triangle interferometer II or be shown in Fig. 3 (b) that polarization splitting prism (14), speculum (15) and speculum (16) form
Beam deviation device (18), effect are by two incident polarization directions are orthogonal and two bunch polarised lights of parallel transmission are coaxially folded
Add.
5. according to the device described in claim 3 and 4, it is characterised in that：The divided beam system and conjunction beam system may be employed more
Kind scheme does not generate other diffraction times, and beam intensity transmitance is high, and energy loss is small, and the alignment of beam combination
It is easy to adjust.
6. the apparatus according to claim 1, it is characterised in that：The light beam regulator control system (4) is by right-angle reflecting prism
(11), half-wave plate (12), phase type SLM (13) compositions：The one side of right-angle reflecting prism (11) is first by two incident beam cross lines
Light beam projects the both sides of the SLM (13) of split screen respectively；After SLM (13) loads phase information, two light beams will reflect
To the opposite side of right-angle reflecting prism (11), two light beams is made to be input to light beam and close beam system (5).Right-angle reflecting prism (11) first
During two divided beams of secondary reflection, horizontal polarization light beam is projected directly at the left-half of SLM；Since SLM is only to horizontal polarization light beam
Response, therefore vertical light beam first passes through the half-wave plate (12) for being close to SLM right half parts, optical axis along 45 ° of directions, makes polarization side
The right half part of SLM is projected after level is become, again by half-wave plate (12) becomes polarization direction again after SLM reflects perpendicular
Directly.
7. device according to claim 5, it is characterised in that：The phase type SLM (13) use split screen method, by
The left and right half parts of SLM load different phase diagrams, realize the real-time adjusting to output vector optical field amplitude, phase and polarization state,
Arbitrary vectorial field can efficiently be generated.
8. the apparatus according to claim 1, it is characterised in that：The polarization direction of the quarter-wave plate (6) and level
The angle in direction is 45 °, can two orthogonal bunch polarised lights of polarization direction be converted into the oppositely oriented circularly polarized light of two beams, is folded
Add generation vectorial field.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270697A (en) * | 2018-11-20 | 2019-01-25 | 深圳大学 | A kind of any column vector light generating device and method based on cross-polarization modulation |
| CN110031982A (en) * | 2019-04-28 | 2019-07-19 | 济南大学 | The method and apparatus of square array vector beam is generated using two-dimensional grating and prism |
| CN110120837A (en) * | 2019-04-08 | 2019-08-13 | 深圳大学 | A kind of device and method promoting vortex light spatial multiplexing communication system stability |
| CN110346939A (en) * | 2019-06-26 | 2019-10-18 | 深圳大学 | A kind of multimode state vector light generating device and method based on Diffraction theory |
| CN111679441A (en) * | 2020-06-03 | 2020-09-18 | 北京大学 | Dynamic column vector light field generation device and method based on optical heterodyne interference method |
| CN111856765A (en) * | 2020-07-31 | 2020-10-30 | 浙江师范大学 | Light cage beam generation system based on self-accelerating beam |
| CN112415762A (en) * | 2020-12-15 | 2021-02-26 | 大连民族大学 | Array vector light generation device and method based on spatial light modulator |
| CN114584220A (en) * | 2022-03-02 | 2022-06-03 | 厦门大学 | Non-orthogonal polarization encoding method based on light spot identification |
| CN115754845A (en) * | 2022-12-07 | 2023-03-07 | 之江实验室 | Atomic magnetometer spatial magnetic field imaging device and method based on vector light modulation |
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| CN109270697A (en) * | 2018-11-20 | 2019-01-25 | 深圳大学 | A kind of any column vector light generating device and method based on cross-polarization modulation |
| CN110120837B (en) * | 2019-04-08 | 2021-05-11 | 深圳大学 | Device and method for improving stability of vortex optical spatial multiplexing communication system |
| CN110120837A (en) * | 2019-04-08 | 2019-08-13 | 深圳大学 | A kind of device and method promoting vortex light spatial multiplexing communication system stability |
| CN110031982A (en) * | 2019-04-28 | 2019-07-19 | 济南大学 | The method and apparatus of square array vector beam is generated using two-dimensional grating and prism |
| CN110031982B (en) * | 2019-04-28 | 2021-05-25 | 济南大学 | Method and device for generating square array vector light beam by using two-dimensional grating and prism |
| CN110346939A (en) * | 2019-06-26 | 2019-10-18 | 深圳大学 | A kind of multimode state vector light generating device and method based on Diffraction theory |
| CN111679441A (en) * | 2020-06-03 | 2020-09-18 | 北京大学 | Dynamic column vector light field generation device and method based on optical heterodyne interference method |
| CN111856765A (en) * | 2020-07-31 | 2020-10-30 | 浙江师范大学 | Light cage beam generation system based on self-accelerating beam |
| CN111856765B (en) * | 2020-07-31 | 2022-11-15 | 浙江师范大学 | Light cage beam generation system based on self-accelerating beam |
| CN112415762A (en) * | 2020-12-15 | 2021-02-26 | 大连民族大学 | Array vector light generation device and method based on spatial light modulator |
| CN112415762B (en) * | 2020-12-15 | 2022-06-17 | 大连民族大学 | Array vector light generation device and method based on spatial light modulator |
| CN114584220A (en) * | 2022-03-02 | 2022-06-03 | 厦门大学 | Non-orthogonal polarization encoding method based on light spot identification |
| CN114584220B (en) * | 2022-03-02 | 2023-07-25 | 厦门大学 | Non-orthogonal polarization coding method based on light spot identification |
| WO2023240740A1 (en) * | 2022-06-14 | 2023-12-21 | 苏州大学 | Azimuthally polarized light beam generation method and device, and anti-turbulence processing method and device for said light beam |
| CN115754845A (en) * | 2022-12-07 | 2023-03-07 | 之江实验室 | Atomic magnetometer spatial magnetic field imaging device and method based on vector light modulation |
| CN115754845B (en) * | 2022-12-07 | 2023-09-01 | 之江实验室 | Atomic magnetometer space magnetic field imaging device and method based on vector light modulation |
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