CN106154562A - A kind of salt free ligands autoacceleration Airy beam freely regulate and control method and device - Google Patents
A kind of salt free ligands autoacceleration Airy beam freely regulate and control method and device Download PDFInfo
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- CN106154562A CN106154562A CN201610512150.XA CN201610512150A CN106154562A CN 106154562 A CN106154562 A CN 106154562A CN 201610512150 A CN201610512150 A CN 201610512150A CN 106154562 A CN106154562 A CN 106154562A
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- light
- airy
- airy beam
- autoacceleration
- salt free
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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
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0927—Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat
-
- 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
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0905—Dividing and/or superposing multiple light beams
-
- 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
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/095—Refractive optical elements
- G02B27/0972—Prisms
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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
- G02B27/30—Collimators
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The invention discloses a kind of salt free ligands autoacceleration Airy beam freely regulates and controls method, and it comprises the following steps: 1) sent Gaussian beam by laser instrument, and described Gaussian beam is collimated and expanded;2) Gaussian beam after collimator and extender is projected on spectroscope, carry out light splitting;3) light beam after light splitting is incident upon it is loaded with in advance in the spatial light modulator of phase graph, carry out phase-modulation;4) light beam after phase modulated is carried out Fourier transformation by fourier lense, obtain Airy beam;5) this Airy beam is injected in Graded-index medium, make this Airy beam can propagate along free track.The invention still further relates to the regulation device of a kind of salt free ligands autoacceleration Airy beam.
Description
Technical field
The invention belongs to optical technology and Beam Control field, especially relate to a kind of salt free ligands autoacceleration Airy beam
Freely regulate and control method and device.
Background technology
1979, British scholar Berry and American scholar Balazs did an important prophesy in quantum mechanics field:
Schrodinger equation has a ripple bag solution following Airy function, and this Airy ripple bag has numerous Strange properties, such as salt free ligands, certainly
Laterally accelerate, spontaneous recovery etc..Attract the attention of the most numerous scientific researcher from this Airy beam, thus really open people
To the flourishing as never before research situation of Airy beam.Because of its numerous charming Strange properties, Airy beam at the beginning of research, people
Just make great efforts as in capture light source applications optics tweezer technology in life medical domain.Optical tweezer technology has positioning accurate
Really, handiness, contactless capture and the advantage handling particle.This light source is widely used in biomedical sector and is handled
Cell, DNA, the biomolecule such as protein.As utilized optical tweezer to realize, DNA is imported cell and realize gene recombinaton;Permissible
Handle chromosome and the biological heredity and variation of DNA research;In order to motor mechanical characteristic studying biomolecule etc..Additionally,
Optical tweezer technology is also applied to imprison and the research of the cooling aspect such as atom and Bose-Einstein condensation.
Airy beam propagation trajectories is parabolic curve, and unconventional straightline propagation, this is to handle particle by parabolic curve
Provide possibility.But, Airy beam propagation trajectories always shows as second-degree parabola track and propagates, it is impossible to realize freely regulating and controlling
This light beam presses the function that arbitrary trajectory is propagated.
Summary of the invention
In order to overcome the deficiencies in the prior art, the present invention provides a kind of and realizes freely regulating and controlling, in fact of beam propagation path
Now utilize this optical beam manipulation microgranule along the freely side of regulation and control of the salt free ligands autoacceleration Airy beam of the orbiting motion arbitrarily preset
Method and device.
The technical solution adopted for the present invention to solve the technical problems is: the freedom of a kind of salt free ligands autoacceleration Airy beam
Regulation and control method, it comprises the following steps: 1) is sent Gaussian beam by laser instrument, and described Gaussian beam is collimated and expand
Bundle;2) Gaussian beam after collimator and extender is projected on spectroscope, carry out light splitting;3) light beam after light splitting is incident upon in advance
It is loaded with in the spatial light modulator of phase graph, carries out phase-modulation;4) light beam after phase modulated is passed through Fourier
Lens carry out Fourier transformation, obtain Airy beam;5) this Airy beam is injected in Graded-index medium, make this Airy light
Bundle can be propagated along free track.
Further, described step 5) complete after, by Airy beam by lens, then received by camera.
The present invention also provides for the regulation device of a kind of salt free ligands autoacceleration Airy beam, including for launching Gaussian beam
Laser instrument, carry out point for collimator and extender mirror Gaussian beam being collimated and expanding, light beam after collimation expands
The Amici prism of light, for the light beam after light splitting being carried out the spatial modulator of phase-modulation, for spatial modulator is carried out
The computer of pre-loaded phase graph, for the light beam after phase modulated is carried out Fourier transformation to obtain Airy beam
Fourier lense, for controlling Graded-index medium and the white light source that this Airy beam is propagated along free orbit.
Further, lens are also included and for the camera that Airy beam is received.
Further, the refractive index gradient of described Graded-index medium changes the light intensity by described white light source and adds
The bias voltage co-controlling being loaded on described Graded-index medium.
Beneficial effects of the present invention: the method, by introducing Graded-index medium, builds and has not along the direction of propagation
Same refractive index spatial distribution, thus freely regulating and controlling of beam propagation path can be realized, manipulation microgranule is along the rail arbitrarily preset
Mark moves, it is achieved the optical micro-manipulation of various complexity;The light beam that the method produces, has salt free ligands, spontaneous recovery, autoacceleration etc. equally
Strange properties, this light beam build auto-convergence light beam, plasma, microgranule manipulation, etc. aspect be respectively provided with good application prospect.
Accompanying drawing explanation
Fig. 1 is the structural representation of regulation device of the present invention.
Fig. 2 is the trajectory diagram that the light beam that the present invention produces is propagated by cosine curve.
Fig. 3 is the trajectory diagram that the light beam that the present invention produces is propagated by loaarithmic curve.
Detailed description of the invention
In order to make those skilled in the art be better understood from the present invention program, below in conjunction with in the embodiment of the present invention
Accompanying drawing, carries out clear, complete description to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
A part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under not making creative work premise, all should belong to the model of present invention protection
Enclose.
With reference to shown in Fig. 1-3, Fig. 1 is the free regulation device of a kind of salt free ligands autoacceleration Airy beam that the present invention produces
Schematic diagram.It includes laser instrument 1, collimator and extender mirror 2, and Amici prism 3, spatial light modulation 4, to control computer 5, Fourier saturating
Mirror 6, Graded-index medium 7, white light source 8, lens 9 and camera 10 are constituted;Described laser instrument 1 is used for launching Gauss light
Bundle, it uses He-Ne laser instrument, and a length of 632.8nm of visible light wave of laser instrument, in other embodiments, it is possible to use Ar from
Sub-laser instrument etc.;Described collimator and extender mirror 2 is for collimating Gaussian beam and expanding, and its focal length is 300mm, clear aperture
For 50mm, certainly in other embodiments, its focal length and clear aperture can be adjusted as the case may be;Described Amici prism
3 light beams after collimation expands carry out light splitting, are sized to 25*25mm;Described spatial light modulation 4 is for light splitting
After light beam carry out phase-modulation, its spatial light modulator is reflective, and its pixel size is set to 8um, and resolution is
1920*1080, service band 400-700nm;Described computer 5 is for carrying out pre-loaded phase graph to spatial modulator 4;
Described fourier lense 6 for carrying out Fourier transformation to obtain Airy beam to the light beam after phase modulated, and its focal length sets
It is set to 300mm;Described Graded-index medium 7 is used for controlling this Airy beam and propagates along free orbit, and this graded index is situated between
Matter 7 utilizes white light source 8 will to produce in white light to photorefractive crystal SBN, and its refractive index gradient is by white light
The light distribution of light source 8 and the bias voltage co-controlling loaded on the crystal;Described white light source is located at by described lens 9
8 rear portions, its focal length is set to 30cm;Described camera 10 is for receiving the Airy beam after lens, and then carries out light beam
Observe;Camera uses CCD camera, and its resolution is set to 1920*1080.
By above-mentioned regulation device, and then salt free ligands autoacceleration Airy beam can be carried out free regulation and control, concrete grammar is such as
Under: after being sent Gaussian beam by laser instrument, this Gaussian beam arrives collimator and extender mirror position, via this collimator and extender mirror to Gauss
Light beam collimates and expands, and light beam is full of whole clear aperature;Directional light after collimator and extender mirror will expand afterwards projects
On Amici prism, by Amici prism, this light beam is carried out light splitting operation so that it is to spatial light modulator transmission;Light beam is injected into
After in described spatial light modulator, the phase graph being carried in advance in described spatial light modulator carries out phase diagram tune
System, transmits to described fourier lense the most again;Described phase graph is to be controlled by described computer, is carried in sky in advance
Between on photomodulator;After light beam arrives described fourier lense, carry out Fourier transformation by fourier lense, burnt behind
Airy beam is produced on face;This Airy beam continues to transmit rearward afterwards, is incident upon in described Graded-index medium, due to this
Graded-index medium can build has different refractive index spatial distributions along the direction of propagation, thus when this Airy beam exists
When propagating in it, can propagate along free track;And then realize freely regulating and controlling of beam propagation path, manipulation microgranule along
The orbiting motion arbitrarily preset.
This Airy beam can be received by described CCD camera after by lens, so by computer carry out display and
Observe.
According to paraxial wave equations, one-dimensional light field follows equation below in gradient media index medium:
Wherein, φ represents light field, and n is medium refraction index, and dn is medium refraction index gradient, dn substantially direction of propagation z
Function, k=2 π/λ is wave number, and λ is operation wavelength.In view of preferable Airy beam, there is infinitely great energy, thus actual
On cannot obtain.Therefore we add initializing constraint φ1(x, z=0)=Ai (x) exp (ax), is i.e. multiplied by a decay
E index factor exp (ax), it is possible to obtain the biography deferred in there is Graded-index medium of the Airy beam in reality
Broadcast equation:
φ2(x, z)=Ai [x-(z/2)2-(dn/2n)z2+iaz]×exp[ax-a(1+dn/n)(z2/2)+i(a2z/2)+i
(1+2k·dn/n)xz/2-i(1+2k·dn2/n2+3dn/n)(z3/ 12)]. formula (2)
Wherein, a is a positive number much smaller than 1.Its propagation trajectories can be obtained actually by refractive index gradient from formula (2)
Dn regulates and controls, it may be assumed that
x-(z/2)2-(dn/2n)z2=0. formula (3)
Then refractive index gradient can be expressed as:
Dn=(x/z2-1/4) 2n. formula (4)
It is now assumed that in x-z-plane, light beam is propagated by following cosine track:
X=f (z)=5cos2z formula (5)
Then according to formula (4), as long as the medium refraction index gradient in SBN crystal is according to designing as follows
Wherein, γ is bias voltage coefficient, ImFor the spatial light intensity distribution of induction white light source, different light distribution lures
Lead and obtain different light refractive indexes, thus cause refractive index to have gradient.As long as dn meets above-mentioned theory modular form (4), i.e.
Light beam can be realized transmit along arbitrary trajectory.Certainly this model can easily be extended to two-dimensional space.
Above-mentioned detailed description of the invention is used for illustrating the present invention rather than limiting the invention, the present invention's
In spirit and scope of the claims, any modifications and changes that the present invention is made, both fall within the protection model of the present invention
Enclose.
Claims (5)
1. salt free ligands autoacceleration Airy beam freely regulate and control a method, it comprises the following steps:
1) sent Gaussian beam by laser instrument (1), and described Gaussian beam is collimated and expands;
2) Gaussian beam after collimator and extender is projected on spectroscope (3) and carry out light splitting;
3) light beam after light splitting is incident upon in the spatial light modulator (4) being loaded with phase graph in advance, carries out phase-modulation;
4) light beam after phase modulated is carried out Fourier transformation by fourier lense (6), obtain Airy beam;
5) this Airy beam is injected in Graded-index medium (7), make this Airy beam can propagate along free track.
A kind of salt free ligands autoacceleration Airy beam the most according to claim 1 freely regulate and control method, it is characterised in that: institute
State after step 5) completes, by Airy beam by lens (9), then received by camera (10).
3. the regulation device of a salt free ligands autoacceleration Airy beam, it is characterised in that: include for launching swashing of Gaussian beam
Light device (1), enter for the collimator and extender mirror (2) Gaussian beam being collimated and expanding, light beam after collimation expands
The Amici prism (3) of row light splitting, for the light beam after light splitting being carried out the spatial modulator (4) of phase-modulation, for space
Manipulator (4) carries out the computer (5) of pre-loaded phase graph, for the light beam after phase modulated is carried out Fourier's change
Change to obtain the fourier lense (6) of Airy beam, for controlling the graded index that this Airy beam is propagated along free orbit
Medium (7) and white light source (8).
The regulation device of a kind of salt free ligands autoacceleration Airy beam the most according to claim 3, it is characterised in that: also include
Lens (9) and for camera (10) that Airy beam is received.
The regulation device of a kind of salt free ligands autoacceleration Airy beam the most according to claim 3, it is characterised in that: described ladder
The refractive index gradient of degree index medium (7) changes the light intensity by described white light source (8) and is carried in described graded index
Bias voltage co-controlling on medium (7).
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Cited By (11)
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CN107346043A (en) * | 2017-05-08 | 2017-11-14 | 浙江师范大学 | A kind of method of large scale regulation and control Airy beam transmission locus |
CN108549164A (en) * | 2018-04-18 | 2018-09-18 | 浙江师范大学 | Along the light beam generation method and system of the transmission of free track |
CN109188576A (en) * | 2018-08-14 | 2019-01-11 | 华东师范大学 | A method of the Ai Li light field based on surface phasmon prepares nano material |
CN109656028A (en) * | 2019-01-11 | 2019-04-19 | 中国科学院广州生物医药与健康研究院 | A kind of system and method generating diffraction light-free |
CN109669273A (en) * | 2019-03-04 | 2019-04-23 | 福建师范大学 | A kind of compact laser beam splitting arrangement for laser power therapeutic |
CN109877445A (en) * | 2019-04-12 | 2019-06-14 | 北京理工大学 | A kind of adjustable femtosecond laser Beams curved surface structure high-efficiency machining method |
CN110568621A (en) * | 2019-08-21 | 2019-12-13 | 河南科技大学 | airy beam transmission track regulation and control method based on prism phase modulation |
CN111025664A (en) * | 2019-12-26 | 2020-04-17 | 怀化学院 | Control method and system for self-accelerating light beam |
CN111522140A (en) * | 2020-05-26 | 2020-08-11 | 中山大学 | Method and device for generating multiple self-focusing light beams and preparation method thereof |
CN113308336A (en) * | 2021-05-27 | 2021-08-27 | 浙江师范大学 | Optical micro-manipulation system |
CN114967130A (en) * | 2022-07-04 | 2022-08-30 | 山西大学 | Airy pulse symmetric reversal transmission method in dispersion management optical fiber system |
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Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107346043A (en) * | 2017-05-08 | 2017-11-14 | 浙江师范大学 | A kind of method of large scale regulation and control Airy beam transmission locus |
CN108549164A (en) * | 2018-04-18 | 2018-09-18 | 浙江师范大学 | Along the light beam generation method and system of the transmission of free track |
CN109188576A (en) * | 2018-08-14 | 2019-01-11 | 华东师范大学 | A method of the Ai Li light field based on surface phasmon prepares nano material |
CN109656028A (en) * | 2019-01-11 | 2019-04-19 | 中国科学院广州生物医药与健康研究院 | A kind of system and method generating diffraction light-free |
CN109669273A (en) * | 2019-03-04 | 2019-04-23 | 福建师范大学 | A kind of compact laser beam splitting arrangement for laser power therapeutic |
CN109877445A (en) * | 2019-04-12 | 2019-06-14 | 北京理工大学 | A kind of adjustable femtosecond laser Beams curved surface structure high-efficiency machining method |
CN110568621A (en) * | 2019-08-21 | 2019-12-13 | 河南科技大学 | airy beam transmission track regulation and control method based on prism phase modulation |
CN111025664A (en) * | 2019-12-26 | 2020-04-17 | 怀化学院 | Control method and system for self-accelerating light beam |
CN111522140A (en) * | 2020-05-26 | 2020-08-11 | 中山大学 | Method and device for generating multiple self-focusing light beams and preparation method thereof |
CN111522140B (en) * | 2020-05-26 | 2021-03-19 | 中山大学 | Method and device for generating multiple self-focusing light beams and preparation method thereof |
CN113308336A (en) * | 2021-05-27 | 2021-08-27 | 浙江师范大学 | Optical micro-manipulation system |
CN114967130A (en) * | 2022-07-04 | 2022-08-30 | 山西大学 | Airy pulse symmetric reversal transmission method in dispersion management optical fiber system |
CN114967130B (en) * | 2022-07-04 | 2023-07-18 | 山西大学 | Airy pulse symmetrical reverse transmission method in dispersion management optical fiber system |
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