CN108873171A - A kind of multi-core optical fiber class bessel beam Optical Tweezers Array - Google Patents
A kind of multi-core optical fiber class bessel beam Optical Tweezers Array Download PDFInfo
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- CN108873171A CN108873171A CN201810779470.0A CN201810779470A CN108873171A CN 108873171 A CN108873171 A CN 108873171A CN 201810779470 A CN201810779470 A CN 201810779470A CN 108873171 A CN108873171 A CN 108873171A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02042—Multicore optical fibres
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2552—Splicing of light guides, e.g. by fusion or bonding reshaping or reforming of light guides for coupling using thermal heating, e.g. tapering, forming of a lens on light guide ends
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
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Abstract
A kind of multi-core optical fiber class bessel beam Optical Tweezers Array, belongs to optical acquisition technical field.The present invention includes multi-core optical fiber, step multimode fibre and laser light source, the tail optical fiber of laser light source and one end fused biconical taper of multi-core optical fiber are of coupled connections, one end conventional coaxial welding of the other end and step multimode fibre of multi-core optical fiber, the melt processed semicircular spherical structure for being prepared into radius R of the other end of step multimode fibre.The present invention is a kind of novel all -fiber Optical Tweezers Array based on class bessel beam, can be used for the batch operation and screening to multiple fine particles, realizes the cubical array arrangement of specific position；The adjustment of length and step multimode fibre one end fused biconical taper shape to multi-core optical fiber fibre core number, step multimode fibre can be passed through, realize the change of photo potential trap and trapped particle quantity, the micro- accurate operation for realizing fine particle, makes it have a wide range of applications in field of biomedical research.
Description
Technical field
The invention belongs to optical acquisition technical fields, and in particular to a kind of multi-core optical fiber class bessel beam Optical Tweezers Array.
Background technique
Optical tweezer is the tool of the capture of gradient force and scattering force and manipulation particle using light distribution.By U.S.'s Belle experiment
The Askin of room and its colleague be put forward for the first time within 1986 (Optics Letters, 18 (5):288-290,1986), Yi Zhongji
In the three-dimensional optical potential well of single beam laser, for realizing the Three dimensions control to fine particle, therefore light beam can realize space pair
The clamping of fine particle is gained the name " optical tweezer ".Hereafter, optical tweezer technology is quickly grown, and becomes important investigative technique means, keeps it wide
It is raw from active somatic cell to DNA from the particle of hundreds of microns to nanoparticle in the general field operation applied to various fine particles
Object macromolecular chain can be captured and be operated with optical tweezer.
Since traditional optical optical tweezers system is larger based on its volume of optical microscope system, lacks flexibility, operation certainly in structure
It is smaller by spending.Optical fiber is as waveguide medium, and flexible characteristic in complex space more suitable for carrying out microoperation.With conventional optical tweezer
System is compared, and optical fiber optical tweezers are developed due to it has the characteristics that simple structure, cheap, flexible operation.
Since being developed to array fibre optical tweezer technology by multi fiber optical tweezer, a variety of optical fiber optical tweezers systems have been produced.For example,
Disclose within 2008 entitled " multiple light forceps for being integrated in simple optical fiber ", publication number CN101251620, by adjusting the geometry of fibre core
Arrangement while multiple fine particles of different location geometry arrangement, it can be achieved that capture, while making the capture of optical tweezer
It can be greatly improved；2010, " the axial direction based on array core fibre of Publication No. CN101893736A was disclosed successively
Optical Tweezers Array and light power-control method ", the axial direction Optical Tweezers Array are in regular octahedron knot in the optical trap that optical fiber connector is formed
The apex of structure, regular octahedron forms optical trap, and the driving circuit by adjusting Piezoelectric Ceramic device changes array core
Optical fiber direction position is moved into the phase controlling of row transmitting beam, realizes power distribution and adjustment, controls the axial direction Optical Tweezers Array ligh trap
Power distribution；" array optical tweezers and preparation method thereof based on multi-core polarization-preserving fiber " of Publication No. CN101907742A, the battle array
Column optical tweezer can form fine and close interference grid light field array in optical fiber end, form optical trap to particle in coherent enhancement point
Realize the functions such as screening.These optical tweezer multipotencys realize the functions such as the capture operation of multiparticle, but few carry out submicron order
The optical tweezer of particle three-dimensional array capture and operation.
Summary of the invention
For above-mentioned existing invention, the present invention provides it is a kind of saved physical space while, realize single fiber three
Tie up the single fiber Optical Tweezers Array based on optical fiber class bessel beam of array capture.
To achieve the above object, a kind of multi-core optical fiber class bessel beam Optical Tweezers Array disclosed by the invention, including multicore
Optical fiber (3), step multimode fibre (2) and laser light source (4), the tail optical fiber (41) of laser light source (4) and the one end of multi-core optical fiber (3)
Fused biconical taper is of coupled connections, the other end of multi-core optical fiber (3) and one end conventional coaxial welding of step multimode fibre (2), step
The melt processed semicircular spherical structure (22) for being prepared into radius R of the other end of multimode fibre (2).
The quantity of the fibre core (31) of multi-core optical fiber (3) is more than or equal to 2, and the distribution of fibre core (31) is not fixed.
Step multimode fibre (2) be core diameter be greater than multi-core optical fiber fibre core away from step-refraction index distribution multimode fibre,
The length range of step multimode fibre (2) is 200-500 μm, and the range of the radius R of semicircular spherical structure (22) is 50-90 μ
m。
By the control of welding current time, the shape of semicircular spherical structure (22) is controlled.
The beneficial effects of the present invention are：
The present invention is a kind of novel all -fiber Optical Tweezers Array based on class bessel beam；It is more using multi-core optical fiber and step
The class bessel beam that the coaxial welding of mode fiber excites in step multimode fibre interferes to form fine and close three-dimensional optical potential well, can
For to multiple fine particles batch operation and screening, realize specific position cubical array arrangement；Based on multi-core optical fiber with
The class bessel beam Optical Tweezers Array of step multimode fibre can pass through the length to multi-core optical fiber fibre core number, step multimode fibre
And the adjustment of step multimode fibre one end fused biconical taper shape, it realizes the change of photo potential trap and trapped particle quantity, realizes small
The micro- accurate operation of particle, makes it have a wide range of applications in field of biomedical research.
Detailed description of the invention
Fig. 1 multi-core optical fiber class bessel beam Optical Tweezers Array structure and schematic illustration (by taking five core fibres as an example)；
Fig. 2 (a)-(c) multi-core optical fiber sectional view, wherein Fig. 2 (a) is twin-core, and Fig. 2 (b) is four cores, and Fig. 2 (c) is five cores；
Fig. 3 is the fibre-optical probe schematic diagram of multi-core optical fiber class bessel beam Optical Tweezers Array；
Fig. 4 is laser light source tail optical fiber and five core fibre fused biconical taper coupled structure schematic diagrames.
Specific embodiment：
The present invention will be further described with reference to the accompanying drawing：
Embodiment 1
A kind of multi-core optical fiber class bessel beam Optical Tweezers Array, including multi-core optical fiber (3), step multimode fibre (2) and swash
Radiant (4), the tail optical fiber (41) and one end fused biconical taper of multi-core optical fiber (3) of laser light source (4) are of coupled connections, multi-core optical fiber
(3) one end conventional coaxial welding of the other end and step multimode fibre (2), the other end of step multimode fibre (2) is through melting
Processing is prepared into the semicircular spherical structure (22) of radius R, and laser light source (4) issues laser, in step multimode fibre (2)
It is inspired in fibre core (21) class bessel beam (23), semicircle spherical structure (22) converges class bessel beam (23) in space interference
It is formed array three-dimensional photo potential trap (24).
The quantity of the fibre core (31) of multi-core optical fiber (3) is more than or equal to 2, and the distribution of fibre core (31) is not fixed, fibre core (31)
Distribution can be symmetrical, be also possible to asymmetric, different fibre cores (31) distributions bring different ligh trap quantity and position.
Step multimode fibre (2) be core diameter be greater than multi-core optical fiber fibre core away from step-refraction index distribution multimode fibre,
The length range of step multimode fibre (2) is 200-500 μm, and the range of the radius R of semicircular spherical structure (22) is 50-90 μ
Photo potential trap and trapped particle are realized in m, the adjustment of the length and step multimode fibre one end fused biconical taper shape of step multimode fibre
The micro- accurate operation of fine particle is realized in the change of quantity.
By the control of welding current time, the shape of semicircular spherical structure (22) is controlled.
A kind of manufacturing process of multi-core optical fiber class bessel beam Optical Tweezers Array is：
Step 1, laser light source tail optical fiber (41) and five core fibres (3) light source couples：Fused biconical taper is used in conjunction with Fig. 1 and Fig. 4
It couples, draws cone to couple with five core fibres (3) tail optical fiber (41) of laser light source, realize the coupling of laser light source (4) power and divide
With adjustment.
Step 2, class bessel beam excites：In conjunction with Fig. 1 and Fig. 3, in order to excite class in step multimode fibre (2)
Multi-core optical fiber (3) and step multimode fibre (2) conventional coaxial welding are taken step multimode length L by bessel beam (23),
Class bessel beam (23) are inspired in step multimode fibre fibre core (21).
Step 3, prepared by optical fiber cone lens (22)：In conjunction with Fig. 3, the semi-round ball for using melt-processed to be prepared into radius as R
Structure (22) cone forms lens, by the control of welding current time, controls the shape of cone lens.
Step 4, cubical array capture experiment：It after whole system connection is finished, opens light source (4), laser light source is logical
The area Guo Lazhui is coupled into multi-core optical fiber (3), multi-core optical fiber (3) and step multimode fibre (2) conventional coaxial welding, more in step
Class bessel beam (23) are excited in mode fiber fibre core (21), such bessel beam (23) is through multimode fibre semicircular structure
(22) interference forms three-dimensional optical potential well (24) after converging, and achievees the purpose that the cubical array capture for realizing fine particle.
Embodiment 2
The present invention relates to optical acquisition field, specifically a kind of multi-core optical fiber class bessel beam Optical Tweezers Array.
Optical tweezer is the tool of the capture of gradient force and scattering force and manipulation particle using light distribution.By U.S.'s Belle experiment
The Askin of room and its colleague be put forward for the first time within 1986 (Optics Letters, 18 (5):288-290,1986), Yi Zhongji
In the three-dimensional optical potential well of single beam laser, for realizing the Three dimensions control to fine particle, therefore light beam can realize space pair
The clamping of fine particle is gained the name " optical tweezer ".Hereafter, optical tweezer technology is quickly grown, and becomes important investigative technique means, keeps it wide
It is raw from active somatic cell to DNA from the particle of hundreds of microns to nanoparticle in the general field operation applied to various fine particles
Object macromolecular chain can be captured and be operated with optical tweezer.
Since traditional optical optical tweezers system is larger based on its volume of optical microscope system, lacks flexibility, operation certainly in structure
It is smaller by spending.Optical fiber is as waveguide medium, and flexible characteristic in complex space more suitable for carrying out microoperation.With conventional optical tweezer
System is compared, and optical fiber optical tweezers are developed due to it has the characteristics that simple structure, cheap, flexible operation.
Since being developed to array fibre optical tweezer technology by multi fiber optical tweezer, a variety of optical fiber optical tweezers systems have been produced.For example,
Disclose within 2008 entitled " multiple light forceps for being integrated in simple optical fiber ", publication number CN101251620, by adjusting the geometry of fibre core
Arrangement while multiple fine particles of different location geometry arrangement, it can be achieved that capture, while making the capture of optical tweezer
It can be greatly improved；2010, " the axial direction based on array core fibre of Publication No. CN101893736A was disclosed successively
Optical Tweezers Array and light power-control method ", the axial direction Optical Tweezers Array are in regular octahedron knot in the optical trap that optical fiber connector is formed
The apex of structure, regular octahedron forms optical trap, and the driving circuit by adjusting Piezoelectric Ceramic device changes array core
Optical fiber direction position is moved into the phase controlling of row transmitting beam, realizes power distribution and adjustment, controls the axial direction Optical Tweezers Array ligh trap
Power distribution；" array optical tweezers and preparation method thereof based on multi-core polarization-preserving fiber " of Publication No. CN101907742A, the battle array
Column optical tweezer can form fine and close interference grid light field array in optical fiber end, form optical trap to particle in coherent enhancement point
Realize the functions such as screening.These optical tweezer multipotencys realize the functions such as the capture operation of multiparticle, but few carry out submicron order
The optical tweezer of particle three-dimensional array capture and operation.
It is an object of the invention to propose it is a kind of saved physical space while, realize single fiber cubical array capture
The single fiber Optical Tweezers Array based on optical fiber class bessel beam.
The object of the present invention is achieved like this：
A kind of multi-core optical fiber class bessel beam Optical Tweezers Array, including multi-core optical fiber (3) step multimode fibre (2) and laser
Light source (4), it is characterized in that：The tail optical fiber (41) and one end fused biconical taper of multi-core optical fiber (3) of laser light source (4) are of coupled connections, more
The other end of core fibre (3) and step multimode fibre (2) conventional coaxial welding, in the fibre core (21) of step multimode fibre (2)
Class bessel beam (23) are inspired, are prepared into half for the other end of the step multimode fibre (2) of certain length L is melt processed
The semicircular spherical structure (22) of diameter R is formed by semicircle spherical structure (22) convergence class bessel beam (23) in space interference
Array three-dimensional photo potential trap (24).
The quantity of its fibre core (31) of multi-core optical fiber (3) is more than or equal to 2.
Step multimode fibre (2) be core diameter be greater than multi-core optical fiber fibre core away from step-refraction index distribution multimode fibre,
Its length L is 200-500 μm desirable, and the radius R of other end semicircular spherical structure (22) made of melting can use 50-90 μ
m。
The tail optical fiber of laser light source (4) is coupled with one end fused biconical taper of multi-core optical fiber (3), realizes the coupling and distribution of power
Adjustment.
The advantages and features of the present invention is：
Illustrate a kind of novel all -fiber Optical Tweezers Array based on class bessel beam；
The class bessel beam excited in step multimode fibre using multi-core optical fiber with the coaxial welding of step multimode fibre
Interference forms fine and close three-dimensional optical potential well, can be used for the batch operation and screening to multiple fine particles, realizes specific position
Cubical array arrangement；
Class bessel beam Optical Tweezers Array based on multi-core optical fiber and step multimode fibre can be by multi-core optical fiber fibre core
Photo potential trap and capture are realized in the adjustment of number, the length of step multimode fibre and step multimode fibre one end fused biconical taper shape
The change of number of particles realizes the micro- accurate operation of fine particle, it is made to be widely used in field of biomedical research
Value.
It illustrates with reference to the accompanying drawing and the present invention is discussed in more detail：
It is an object of the invention to propose it is a kind of saved physical space while, realize single fiber cubical array capture
The single fiber Optical Tweezers Array based on optical fiber class bessel beam.This single fiber Optical Tweezers Array illustrates a kind of based on class shellfish plug
The novel all -fiber Optical Tweezers Array of your light beam；Meanwhile can be used for batch operation and screening to multiple fine particles, it realizes specific
The cubical array of position arranges, it is made to have a wide range of applications in field of biomedical research.
A kind of multi-core optical fiber class bessel beam Optical Tweezers Array, including multi-core optical fiber (3) step multimode fibre (2) and laser
Light source (4), it is characterized in that：The tail optical fiber (41) and one end fused biconical taper of multi-core optical fiber (3) of laser light source (4) are of coupled connections, more
The other end of core fibre (3) and step multimode fibre (2) conventional coaxial welding, in the fibre core (21) of step multimode fibre (2)
Class bessel beam (23) are inspired, are prepared into half for the other end of the step multimode fibre (2) of certain length L is melt processed
The semicircular spherical structure (22) of diameter R is formed by semicircle spherical structure (22) convergence class bessel beam (23) in space interference
Array three-dimensional photo potential trap (24).
The quantity of described its fibre core (31) of multi-core optical fiber (3) is more than or equal to 2.
The step multimode fibre (2) be core diameter be greater than multi-core optical fiber fibre core away from step-refraction index distribution multimode
Optical fiber, length L is 200-500 μm desirable, and the radius R of other end semicircular spherical structure (22) made of melting is desirable
50-90μm。
The tail optical fiber of the laser light source (4) is coupled with one end fused biconical taper of multi-core optical fiber (3), realizes the coupling of power
It is adjusted with distribution.
Fig. 1 multi-core optical fiber class bessel beam Optical Tweezers Array structure and schematic illustration (by taking five core fibres as an example).Wherein
It (1) is the single fiber class bessel array optical tweezer that array capture can be achieved, (2) are big core diameter step multimode fibre, and (3) are more
Core fibre, (4) are laser light source, and (22) are the hemispherical lens that the radius made of melting is R.Laser light source (4) tail optical fiber
It is coupled with multi-core optical fiber (3) one end by fused biconical taper, multi-core optical fiber (3) other end and step multimode fibre (2) conventional coaxial
Welding, to excite the class bessel beam in step multimode fibre, class bessel beam passes through the half of step multimode fibre one end
Sphere lens (22) finally realize that cubical array captures in space interference forming array ligh trap.
Fig. 2 (a)-(c) multi-core optical fiber sectional view, wherein Fig. 2 (a) is twin-core, and Fig. 2 (b) is four cores, and Fig. 2 (c) is five cores.
The distribution of fibre core can be symmetrically, be also possible to asymmetric, and the distribution of different fibre cores brings different ligh trap quantity and position.
Fig. 3 is the fibre-optical probe schematic diagram of multi-core optical fiber class bessel beam Optical Tweezers Array.Multi-core optical fiber (2) and step are more
Mode fiber (3) conventional coaxial welding is to excite the class bessel beam in step multimode.The fiber lengths of step multimode (3) are L,
The hemispherical lens (22) that radius is R is made in the melting of its other end, and class bessel beam is dry in space convergence by sphere lens
It relates to form array ligh trap.
Fig. 4 is laser light source tail optical fiber and five core fibre fused biconical taper coupled structure schematic diagrames.It can by fused biconical taper coupling
The coupling and distribution for realizing laser light source (4) power adjust.
The single fiber class Bezier optical tweezer (1) that this cubical array captures is realized in conjunction with Fig. 1, mainly includes multi-core optical fiber
(3) step multimode fibre (2) and laser light source (4).The tail optical fiber (41) of laser light source (4) and the one end of multi-core optical fiber (3) melt
Cone is drawn to be of coupled connections, the other end of multi-core optical fiber (3) and step multimode fibre (2) conventional coaxial welding, in step multimode fibre
(2) it is inspired class bessel beam (23) in fibre core (21), the other end of step multimode fibre (2) is melt processed to be prepared into
Radius is the semicircle spherical structure (22) of R, interferes shape in space by semicircle spherical structure (22) convergence class bessel beam (23)
At array three-dimensional photo potential trap (24).
The manufacturing process of the single fiber optical tweezers of present embodiment：
Step 1, laser light source tail optical fiber (41) and five core fibres (3) light source couples：Fused biconical taper is used in conjunction with Fig. 1 and Fig. 4
It couples, draws cone to couple with five core fibres (3) tail optical fiber (41) of laser light source, realize the coupling of laser light source (4) power and divide
With adjustment.
Step 2, class bessel beam excites：In conjunction with Fig. 1 and Fig. 3, in order to excite class in step multimode fibre (2)
Multi-core optical fiber (3) and step multimode fibre (2) conventional coaxial welding are taken step multimode length L by bessel beam (23),
Class bessel beam (23) are inspired in step multimode fibre fibre core (21).
Step 3, prepared by optical fiber cone lens (22)：In conjunction with Fig. 3, the semi-round ball for using melt-processed to be prepared into radius as R
Structure (22) cone forms lens, by the control of welding current time, controls the shape of cone lens.
Step 4, cubical array capture experiment：It after whole system connection is finished, opens light source (4), laser light source is logical
The area Guo Lazhui is coupled into multi-core optical fiber (3), multi-core optical fiber (3) and step multimode fibre (2) conventional coaxial welding, more in step
Class bessel beam (23) are excited in mode fiber fibre core (21), such bessel beam (23) is through multimode fibre semicircular structure
(22) interference forms three-dimensional optical potential well (24) after converging, and achievees the purpose that the cubical array capture for realizing fine particle.
Claims (4)
1. a kind of multi-core optical fiber class bessel beam Optical Tweezers Array, including multi-core optical fiber (3), step multimode fibre (2) and laser
Light source (4), it is characterised in that：The tail optical fiber (41) and one end fused biconical taper of multi-core optical fiber (3) of laser light source (4) are of coupled connections,
One end conventional coaxial welding of the other end of multi-core optical fiber (3) and step multimode fibre (2), step multimode fibre (2) it is another
Hold the melt processed semicircular spherical structure (22) for being prepared into radius R.
2. a kind of multi-core optical fiber class bessel beam Optical Tweezers Array according to claim 1, it is characterised in that：Multi-core optical fiber
(3) quantity of fibre core (31) is more than or equal to 2, and the distribution of fibre core (31) is not fixed, and different fibre core (31) distributions, which are brought, does not share the same light
Trap quantity and position.
3. a kind of multi-core optical fiber class bessel beam Optical Tweezers Array according to claim 1, it is characterised in that：Step multimode
Optical fiber (2) be core diameter be greater than multi-core optical fiber fibre core away from step-refraction index distribution multimode fibre, step multimode fibre (2)
Length range is 200-500 μm, and the range of the radius R of semicircular spherical structure (22) is 50-90 μm.
4. a kind of multi-core optical fiber class bessel beam Optical Tweezers Array according to claim 1, it is characterised in that：Pass through welding
The control of current time controls the shape of semicircular spherical structure (22).
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| CN201810779470.0A CN108873171B (en) | 2018-07-16 | 2018-07-16 | Multicore optical fiber Bessel-like beam array optical tweezers |
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| CN201810779470.0A CN108873171B (en) | 2018-07-16 | 2018-07-16 | Multicore optical fiber Bessel-like beam array optical tweezers |
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| CN109669246A (en) * | 2018-12-27 | 2019-04-23 | 中国电子科技集团公司第三十四研究所 | A kind of array fibre optical tweezer drawing method |
| CN110237875A (en) * | 2019-05-31 | 2019-09-17 | 西安交通大学 | Label-free living cells based on quasi- Bezier optical waveguide structure detects micro-fluidic chip |
| CN111653379A (en) * | 2020-06-05 | 2020-09-11 | 桂林电子科技大学 | Nanoparticle conveyor based on multi-fiber optical tweezers |
| CN112071462A (en) * | 2020-06-05 | 2020-12-11 | 桂林电子科技大学 | Adjustable single optical fiber particle conveyor |
| CN112068251A (en) * | 2020-09-06 | 2020-12-11 | 桂林电子科技大学 | Optical fiber Bessel light beam optical tweezers and device |
| US20220196932A1 (en) * | 2020-12-22 | 2022-06-23 | Lumentum Operations Llc | Emitter module |
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