CN109270695A - A kind of traction beam generated device and production method - Google Patents
A kind of traction beam generated device and production method Download PDFInfo
- Publication number
- CN109270695A CN109270695A CN201811447760.1A CN201811447760A CN109270695A CN 109270695 A CN109270695 A CN 109270695A CN 201811447760 A CN201811447760 A CN 201811447760A CN 109270695 A CN109270695 A CN 109270695A
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- fiber
- optical fiber
- toroidal cores
- bezier
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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
- G02B27/0938—Using specific optical elements
- G02B27/0994—Fibers, light pipes
Abstract
The present invention provides a kind of traction beam generated device and production method, including single-core fiber, annular core fibre and toroidal cores Bezier optical fiber；The single-core fiber, annular core fibre and toroidal cores Bezier optical fiber are sequentially connected, the single-core fiber and toroidal cores fiber connection points are coupling cone area, the toroidal cores Bezier optical fiber is made of covering and multiple concentric circles annular waveguide cores, the toroidal cores fiber core is connect with toroidal cores Bezier optical fiber most inner side disc waveguide core, and the end face of the toroidal cores Bezier optical fiber is circular cone structure.Compared to the method for Traditional Space optical configuration light beam, the present invention provides a kind of feasible schemes of traction light beam for micro, this method has had both the advantages of flexibility, micromation and traction light beam of optical fiber, it is had a good application prospect in biology, chemistry and micro Process field, the device that the present invention uses is cheap, and preparation method is simple.
Description
Technical field
The present invention relates to a kind of beam generated device and production method more particularly to a kind of novel traction beam generated devices
And production method, belong to extraordinary light beam research field.
Background technique
The light beam for being able to achieve optics traction effect is known as optics traction light beam, and traction light beam is a kind of light of anti-physical instinct
Phenomenon is learned, recognizing substantially for thrust must be applied to object by changing the Beams that researchers before this have been generally acknowledged that
Know, the phenomenon of this abnormality of optics tractive force must imply the new rule of certain special light-matter interactions, therefore
There is important meaning in the person's character of light and the basic research of light-matter interaction, while drawing light beam and may be implemented pair
The long range of object is manipulated and is transported, the optical fractionation technique based on traction light beam, it is considered to be most have in terms of biological medicine
The optical instrument of prospect.
2011, the Jun Chen of Fudan University and the C.T.Chan group of Hong Kong University of Science and Thchnology proposed light drag power
Concept (Nature photonics, 2011,5 (9): 531-534), in the work of Chen et al., utilizes non-diffraction Bei Sai
Your light beam irradiates a bead, and incident light can excite the multipole moments of particle, is increased in direction of beam propagation by multipole interference
Scattering light, when scatter light momentum be greater than incident light momentum when, particle will obtain negative momentum, thus against direction of beam propagation transport
It is dynamic.Brzobohaty in 2013 et al. (Nature Photonics, 2013,7 (2): 123-127) is using two-beam interference
Method realizes optics tractive force, enhances the forward scattering of particle using two-beam interference, so that object be made to obtain a light
Pulling force is learned, the effect of different particle separation is realized.
The research of traction light beam at present, is mostly based on space optical path, needs expensive and large-scale using spatial light modulator etc.
Space optics equipment, the building and variation of light field are realized by various spatial optical elements, complicated, optical system that there are optical paths
The problems such as huge, and probe-type application difficult to realize.
Summary of the invention
The purpose of the invention is to generate it is a kind of on optical propagation direction have salt free ligands, the traction light without gradient characteristics
Beam generation device and production method.
The object of the present invention is achieved like this:
A kind of traction beam generated device, including single-core fiber, annular core fibre and toroidal cores Bezier optical fiber；The list
Core fibre, annular core fibre and toroidal cores Bezier optical fiber are sequentially connected, and the single-core fiber and toroidal cores fiber connection points are
Coupling cone area, the toroidal cores Bezier optical fiber are made of covering and multiple concentric circles annular waveguide cores, the toroidal cores light
Long and slender core is connect with toroidal cores Bezier optical fiber most inner side disc waveguide core, and the end face of the toroidal cores Bezier optical fiber is circular cone
Platform structure.
The invention also includes features some in this way:
1. the spatial arrangement of the disc waveguide core meets Bessel-Gauss function；
2. the toroidal cores fiber core thickness and refractive index and toroidal cores Bezier optical fiber most inner side disc waveguide core one
It causes；
3. the toroidal cores fiber core is symmetrical about optical fiber main shaft, and in same interior surrounding layer；
4. single-core fiber described in is single mode optical fiber or multimode fibre, and fiber core is located at optical fiber axle center.
A kind of traction light beam generating method:
Light in light source injection single-core fiber forms annular beam in annular core fibre by coupling cone area,
Annular beam is injected into stabilization after toroidal cores Bezier optical fiber transmits a distance and forms class high-order bessel beam,
Reconstruct is combined to class high-order Bezier light field behind the frustum of a cone end face of toroidal cores Bezier optical fiber, is generated
Draw light beam.
Compared with prior art, the beneficial effects of the present invention are:
1. the present invention provides a kind of tractions for micro compared to the method for Traditional Space optical configuration light beam
The advantages of feasible scheme of light beam, this method has had both the flexibility, micromation and traction light beam of optical fiber, in biology, change
It learns and micro Process field has a good application prospect.
2. this novel traction light beam not only has symmetrical space structure, it is also equipped with the spy of bessel beam salt free ligands
Point can realize long-reach optics draw operations in fine particle therein, enrich the structure type of traction light beam.
3. the device used is cheap, preparation method is simple.
The present invention generates class high-order bessel beam using optical fiber technology in a fiber, then passes through a special designing
Fiber end face is combined reconstruct to light field and obtains novel traction light beam, and the novel traction light beam after combination is in direction of beam propagation
It is upper that there are salt free ligands, the characteristic without gradient, it, can be real to the fine particle in light beam in the case where the effect of no gradient force
Existing optics traction.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is light wave coupling process analogous diagram in toroidal cores Bezier optical fiber；
Fig. 3 is that annular beam structural schematic diagram is excited in toroidal cores；
Fig. 4 a is toroidal cores Bezier optical fiber lapping end view；
Fig. 4 b is the top view of Fig. 4 a.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing.
A kind of traction beam generated device and production method, including light source 1, single-core fiber 2, annular core fibre 3, single light
Fibre 2 and the welding of annular 3 one end of core fibre and fused biconical taper and the coupling cone area 4, toroidal cores Bezier optical fiber that are formed at solder joint
5, the circular cone structure 6 that 5 end face of toroidal cores Bezier optical fiber is formed by processing, which is characterized in that light source 1 injects single-core fiber
2 light forms annular beam by coupling cone area 4 in annular core fibre 3, and annular beam is injected into toroidal cores Bezier optical fiber
Stabilization forms class high-order bessel beam after 5 transmission a distances, behind the frustum of a cone end face 6 of toroidal cores Bezier optical fiber 5
Reconstruct is combined to class high-order Bezier light field, generate it is a kind of on optical propagation direction have salt free ligands, without gradient characteristics
Novel traction light beam；The toroidal cores position of the annular core fibre 3 is symmetrical about optical fiber main shaft, and is in same interior surrounding layer
In；The toroidal cores Bezier optical fiber 5 is made of covering and multiple concentric loop ducting layers, multiple concentric loop ducting layers
Spatial arrangement approximation meet Bessel-Gauss function, annular beam is input to one section of 5 coupled transfer of toroidal cores Bezier optical fiber
After distance, class high-order Bayside light beam is generated in toroidal cores Bayside optical fiber 5；The thickness of annular 3 fibre core of core fibre and refraction
Rate is consistent with 5 most inner side disc waveguide core of toroidal cores Bezier optical fiber, and two fibre core faces are welded, so that annular beam injects
Into toroidal cores Bezier optical fiber 5.
The light that light source issues generates annular beam, annular beam is in annular after area 4 is bored in overcoupling in annular core fibre
Coupled transfer in core Bezier optical fiber, the coupled wave equation of satisfaction are as follows:
Wherein κpqIt is the coefficient of coup of toroidal cores p Yu toroidal cores q, may be expressed as:
εq- ε indicates the D-value of dielectric constant of fibre core q and surrounding cladding layers, and the electric field in toroidal cores p may be expressed as:
In this way, just obtaining the cross section light field in toroidal cores Bezier optical fiber:
After an annular light field is input to toroidal cores Bezier optical fiber, light wave is continuous while transmitting along annular fibre core
Coupled transfer is carried out in each layer ducting layer to the outside, by the Light Modulation of a distance, finally generates class high-order in a fiber
Bayside light beam, as shown in Fig. 2, changing light beam after class high-order Bayside light beam passes through the fiber taper end face of design
Exit direction makes optical output field can be realized wide-angle convergence and portfolio restructuring, since bessel beam has self- recoverage characteristic,
Light beam after combination has salt free ligands, the characteristic without gradient in direction of beam propagation, and further increases light beam and dissipating
The momentum component on direction is penetrated, optics traction can be realized to the fine particle in light beam, is generated in direction of beam propagation
Novel traction light beam with salt free ligands, without gradient characteristics.
Embodiment one:
1. selecting wavelength 980nm laser light source, 1.5m single mode optical fiber is intercepted, one end face of single mode optical fiber is shelled by coat
It after removing, clean, cutting, is inserted into naked fibre adapter, naked fibre adapter is accessed into laser light source output interface.
2. one section of interception annular core fibre strips annular core fibre one end, the single mode optical fiber other end, clearly by coat
Wash, cut after be put into optical fiber bonding machine and weld.Optical fiber after welding is loaded on oxyhydrogen flame optical fiber to draw cone machining fixture, makes to weld
Point is immediately below oxyhydrogen flame flame front.The coated layer of the other end of annular core fibre strips, cleans, cut after connect computer
CCD monitoring toroidal cores fiber annular fibre core optical output field, after toroidal cores fiber exit annular beam stop draw cone, use
Glass bushing encapsulation, protection cone area, as shown in Figure 3.
3. taking one section of toroidal cores Bayside optical fiber, the annular core fibre other end, toroidal cores Bayside optical fiber one end are passed through
Coat strips, cleans, cut after be put into optical fiber bonding machine, when welding, toroidal cores fiber core and toroidal cores shellfish
Sai Er optical fiber most inner side disc waveguide core face is welded together.
4. as shown in figure 4, the toroidal cores Bayside optical fiber other end is processed into truncated cone shape using optical fiber lapping technology,
Grinding angle is 45 °, and grinding depth must assure that the focusing that class high-order bessel beam may be implemented.
5. the light that wavelength is 980nm is injected into single mode optical fiber, can go out at the grinding core end of toroidal cores Bezier optical fiber
Penetrate generate it is a kind of in direction of beam propagation have salt free ligands, the novel traction light beam without gradient characteristics.
Embodiment two:
1., will be prepared using rubber head dropper after having constructed the novel traction light beam of one kind by the step of embodiment one
Polystyrene spheres solution drips on glass slide, and glass slide is put on microscopical objective table.
2. toroidal cores Bayside optical fiber is extend into polystyrene through the finished end face of grinding core using three-dimensional manipulating platform
In ball solution, it is completely immersed in fiber end face, and is not contacted directly with glass slide, the direction and glass slide place that optical fiber is placed
Plane it is parallel.
3. microscope focus is adjusted, until can clearly, completely see fiber end face in microscopical eyepiece and gather
Polystyrene sphere in styrene ball solution.
4. opening the light source that wavelength is 980nm, adjustment light source power to 30mW or so adjusts the mobile light of three-dimensional manipulating platform
Fine end face can realize the effect of traction to the polystyrene sphere in traction beam range.
In summary: the present invention provides a kind of novel traction light beam and its construction methods.It is by single-core fiber, annular
Core fibre and toroidal cores Bayside optical fiber successively weld together, in single-core fiber and annular core fibre weld fused biconical taper,
The light of single-core fiber injection generates annular beam in annular core fibre by coupling cone area, and annular beam is injected into toroidal cores
In Bezier optical fiber, by the transmission of a distance, class high-order bessel beam is finally generated in toroidal cores Bayside optical fiber,
Reconstruct is combined to light field behind toroidal cores Bezier fiber taper end face, obtain one kind has on optical propagation direction
Salt free ligands, the novel traction light beam without gradient characteristics can realize optics traction to the fine particle in the light beam, biology,
Chemistry and medical field have a good application prospect.
Claims (10)
1. a kind of traction beam generated device, characterized in that including single-core fiber, annular core fibre and toroidal cores Bezier light
It is fine；The single-core fiber, annular core fibre and toroidal cores Bezier optical fiber are sequentially connected, the single-core fiber and annular core fibre
Tie point is coupling cone area, and the toroidal cores Bezier optical fiber is made of covering and multiple concentric circles annular waveguide cores, described
Toroidal cores fiber core is connect with toroidal cores Bezier optical fiber most inner side disc waveguide core, the end of the toroidal cores Bezier optical fiber
Face is circular cone structure.
2. traction beam generated device according to claim 1, characterized in that the spatial arrangement of the disc waveguide core is full
Sufficient Bessel-Gauss function.
3. traction beam generated device according to claim 1 or 2, characterized in that the toroidal cores fiber core thickness
It is consistent with toroidal cores Bezier optical fiber most inner side disc waveguide core with refractive index.
4. traction beam generated device according to claim 1 or 2, characterized in that the toroidal cores fiber core about
Optical fiber main shaft is symmetrical, and in same interior surrounding layer.
5. traction beam generated device according to claim 3, characterized in that the toroidal cores fiber core is about optical fiber
Main shaft is symmetrical, and in same interior surrounding layer.
6. traction beam generated device according to claim 1 or 2, characterized in that the single-core fiber is single-mode optics
Fine or multimode fibre, fiber core are located at optical fiber axle center.
7. traction beam generated device according to claim 3, characterized in that the single-core fiber be single mode optical fiber or
Multimode fibre, fiber core are located at optical fiber axle center.
8. traction beam generated device according to claim 4, characterized in that the single-core fiber be single mode optical fiber or
Multimode fibre, fiber core are located at optical fiber axle center.
9. traction beam generated device according to claim 5, characterized in that the single-core fiber be single mode optical fiber or
Multimode fibre, fiber core are located at optical fiber axle center.
10. a kind of traction light beam generating method, characterized in that
Light in light source injection single-core fiber forms annular beam in annular core fibre by coupling cone area,
Annular beam is injected into stabilization after toroidal cores Bezier optical fiber transmits a distance and forms class high-order bessel beam,
Reconstruct is combined to class high-order Bezier light field behind the frustum of a cone end face of toroidal cores Bezier optical fiber, generates traction
Light beam.
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| CN201811447760.1A CN109270695B (en) | 2018-11-29 | 2018-11-29 | Traction light beam generating device and method |
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| CN201811447760.1A CN109270695B (en) | 2018-11-29 | 2018-11-29 | Traction light beam generating device and method |
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| CN109683330A (en) * | 2019-01-30 | 2019-04-26 | 复旦大学 | The method that micro- cone generates class bessel beam is grown by fiber end face |
| CN112363320A (en) * | 2020-09-27 | 2021-02-12 | 四川长虹电器股份有限公司 | Optical fiber vortex optical beam generator and preparation method thereof |
| CN113687469A (en) * | 2021-08-26 | 2021-11-23 | 桂林电子科技大学 | Multifunctional optical fiber micro-impact gun tool |
| CN114047635A (en) * | 2021-11-22 | 2022-02-15 | 燕山大学 | Groove-assisted optical fiber capable of generating Bessel beams of different forms |
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| CN113687469A (en) * | 2021-08-26 | 2021-11-23 | 桂林电子科技大学 | Multifunctional optical fiber micro-impact gun tool |
| CN114047635A (en) * | 2021-11-22 | 2022-02-15 | 燕山大学 | Groove-assisted optical fiber capable of generating Bessel beams of different forms |
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