CN101907743B - Throughput type fiber optical tweezers based on coaxial dual-waveguide structure and preparation method - Google Patents
Throughput type fiber optical tweezers based on coaxial dual-waveguide structure and preparation method Download PDFInfo
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- CN101907743B CN101907743B CN2010102154241A CN201010215424A CN101907743B CN 101907743 B CN101907743 B CN 101907743B CN 2010102154241 A CN2010102154241 A CN 2010102154241A CN 201010215424 A CN201010215424 A CN 201010215424A CN 101907743 B CN101907743 B CN 101907743B
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Abstract
The invention provides throughput type fiber optical tweezers based on a coaxial dual-waveguide structure and a preparation method. The throughput type fiber optical tweezers mainly comprise a coaxial double-waveguide microstructure fiber [1], an LD light source with the output wavelength of lambda 1, an LD light source [3] with the output wavelength of lambda 2, a wavelength division multiplexing device [4] and a standard single-mode fiber [5]),wherein the output ends of the light source [2] and the light source [3] are connected with the two input ends of the wavelength division multiplexing device [4]; the output end of the wavelength division multiplexing device [4] is coupled with the coaxial double-waveguide fiber [1]; and the other end of the coaxial double-waveguide fiber [1] is finely ground to obtain the cone structure. The invention controls the particles by utilizing the coaxial double-waveguide fiber, changes the luminous power of the light source by adjustment, and can realize throughput, transmission and resorption of stable trapped particles; and meanwhile, the invention can trap the particles in a more flexible and accurate way, has adjustability, and greatly enhances the practicality of the fiber optical tweezers.
Description
Technical field
What the present invention relates to is a kind of optical fiber optical tweezers.The present invention also relates to a kind of preparation method of optical fiber optical tweezers.
Background technology
The light tweezer is to utilize the gradient force of light intensity distributions and the instrument that fine particle was captured and handled to scattering force.Askin proposed a kind of three-dimensional optical potential well based on single beam laser in " Observation of a single-beam gradient force optical trap for dielectric particles " literary composition in 1986; Be used to realize three dimensions control to particle; Because this light beam can the implementation space to the clamping of fine particle; Hence obtain one's name by " light tweezer ", this piece article is published in Opt.Lett.11,288-290.After this, the optical tweezer technology development becomes important investigative technique means, and has promoted the fast development of some crossing domains rapidly.For example: fine particle catch and the fields such as assembling of carrying, skin ox level force measurement, micromechanics and micro element are widely used.At life science, optical tweezer technology is contactless with it, the intrinsic propesties of lossless detection has shown its impayable advantage especially, has brought into play enormous function for the manipulation that promotes development of life science and little life entity.The particle size that the light tweezer is captured can be rigid particles from several nanometers to tens micron, also can be soft material grains; Can be abiotic particle, also can be active somatic cell or virus.
Since being developed to the optical fiber optical tweezers technology by traditional light tweezer, produced multiple optical fiber optical tweezers system, for example: people such as E.R.Lyons become cone with the end surface grinding of two single-mode fibers; At hemisphere face of the most advanced and sophisticated formation of cone; Make outgoing beam have the weak focusing characteristic, become certain optical axis included angle to place these two optical fiber, the ligh trap that the overlapping light field forms can be realized capture particles and suspension; This piece article is published in Appl.Phys.Lett.66 in nineteen ninety-five, 1584-1586; In order further the attitude of the fine particle of being caught to be controlled; By name " be used for twin-core single fiber optical tweezers of capturing minute particle and preparation method thereof ", publication number are to have provided a kind of twin-core fiber light tweezer again in the Chinese invention patent file of CN101149449.After this, disclose the light tweezer based on ring-shaped multi-core fiber again, publication number is CN101236275; With the multiple light forceps that is integrated in simple optical fiber, publication number is new type light tweezers such as CN101251620, and these new type light tweezer multipotencys are realized particulate is caught, space orientation, made function such as its space rotation, but never see the light tweezer report that can launch trapped particle.
Summary of the invention
The object of the present invention is to provide a kind of possess particulate is caught, space orientation etc. can also realize the throughput type fiber optical tweezer based on coaxial twi guide structure to the function of handling up of catching particulate on the basic function basis.The present invention also aims to provide a kind of preparation method of the throughput type fiber optical tweezer based on coaxial twi guide structure.
The objective of the invention is to realize like this:
Throughput type fiber optical tweezer based on coaxial twi guide structure of the present invention mainly by coaxial double wave lead microstructured optical fibers 1, output wavelength is λ
1 LD light source 2, output wavelength be λ
2 LD light source 3, WDM device 4 and standard single-mode fiber 5 form; Output wavelength is λ
1 LD light source 2 be λ with output wavelength
2The output terminal of LD light source 3 be connected with two input ends of WDM device 4; The output terminal of WDM device 4 is of coupled connections with coaxial double wave leaded light fine 1; Said being of coupled connections is in coupling process, to keep watch on till light distribution, the luminous power in being coupled into two waveguide core be coupled in the coaxial double wave leaded light fine 1 equate, the other end of coaxial double wave leaded light fine 1 is prepared into cone structure through fine gtinding.
Described coaxial double wave leaded light fine 1 comprises a disc waveguide fibre core 101 and a circular waveguide fibre core 102; Circular waveguide fibre core 102 is positioned at the center; Disc waveguide fibre core 101 is positioned at outside the circular waveguide fibre core 102, and disc waveguide fibre core 101 is coaxial with circular waveguide fibre core 102.
The angular range of the angle [alpha] of described cone structure is: pi/2-arcsin (n
Liquid/ n
Core)＜α＜pi/2.
The preparation method of the throughput type fiber optical tweezer based on coaxial twi guide structure of the present invention is:
Step 4, throughput operation: through regulating two input light source light power, make that the luminous power ratio in two fibre cores of coaxial double wave leaded light fine 1 changes, realize the function of handling up of this light tweezer.
The major advantage of the optical fiber optical tweezers based on coaxial twi guide structure of the present invention is to utilize coaxial double wave leaded light fibre that particulate is controlled, and changes light source light power through regulating, and can realize stablizing handling up, launching of trapped particle, even inhale back; Simultaneously, flexible more, accurate based on the throughput type light tweezer of coaxial twi guide structure to capture particles, possess controllability, improved the practicality of optical fiber optical tweezers technology greatly.
Description of drawings
Fig. 1 is based on the system architecture synoptic diagram of the throughput type fiber optical tweezer of coaxial twi guide structure optical fiber.
The fine cross-sectional view of the coaxial double wave leaded light of Fig. 2.
Fig. 3 single-mode fiber and the coaxial double wave leaded light fibre synoptic diagram that is of coupled connections.
The coaxial double wave of Fig. 4 is led optical fiber end and is ground the cone synoptic diagram.
Fig. 5 is based on the fine throughput type fiber optical tweezers system isoboles of coaxial double wave leaded light.
Fig. 6 throughput type fiber optical tweezer realizes handling up functional schematic.
Fig. 7 adopts the system architecture synoptic diagram based on the throughput type fiber optical tweezer of coaxial twi guide structure optical fiber of wavelength-tunable LD light source.
Fig. 8 adopts the throughput type fiber optical tweezers system isoboles based on coaxial double wave leaded light fibre of wavelength-tunable LD light source.
Embodiment
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
Fig. 1 is based on the system architecture synoptic diagram that coaxial double wave is led the throughput type fiber optical tweezer of microstructured optical fibers.Among the figure, 1 is that coaxial double wave leaded light is fine, and 101 is annular fibre core; 102 is the axle center fibre core, and the two distributes with one heart, and 2 and 3 is the system source of two wavelength; 4 is WDM device; 5 common standard single mode single-core fibers, 7 are the fine fused biconical taper of single-core fiber and the coaxial double wave leaded light position that is of coupled connections, the 103rd, be the optical fiber end of catching fine gtinding of realization to fine particle.
Fig. 2 is the fine cross-sectional view of coaxial double wave leaded light.Among the figure, 1 is that coaxial double wave leaded light is fine, and 101 is annular fibre core, and 102 is the axle center fibre core, and the two distributes with one heart.
Fig. 3 is a single-mode fiber and the coaxial double wave leaded light fibre synoptic diagram that is of coupled connections.Among the figure, 1 is that coaxial double wave leaded light is fine, and 101 be annular fibre core, and 102 be the axle center fibre core, and the two distributes with one heart, 5 common standard single mode single-core fibers, and 7 is single-core fiber and the coaxial double wave leaded light fibre fused biconical taper position that is of coupled connections.
Fig. 4 is that coaxial double wave is led optical fiber end grinding cone synoptic diagram.Among the figure, 1 is that coaxial double wave leaded light is fine, and 101 is annular fibre core, and 102 is the axle center fibre core, and the two distributes with one heart, the 103rd, and for realizing the optical fiber end of catching fine gtinding to fine particle, α is that cone is ground semi-cone angle, is controlled at pi/2-arcsin (n
Liquid/ n
CoreIn the scope of)＜α＜pi/2.
Fig. 5 is based on the fine throughput type fiber optical tweezers system isoboles of coaxial double wave leaded light.Among the figure, 101 is annular fibre core, and 102 is the axle center fibre core, and 2 and 3 is the system source of two wavelength, and 4 is WDM device, 5 common standard single mode single-core fibers, and 7 are single-core fiber and the coaxial double wave leaded light fibre fused biconical taper position that is of coupled connections.
Fig. 6 is that the throughput type fiber optical tweezer realizes handling up functional schematic.Among the figure, 1 is that coaxial double wave leaded light is fine, and 101 is annular fibre core; 102 is the axle center fibre core, and the two distributes with one heart, the 103rd, for realizing the optical fiber end of catching fine gtinding to fine particle; 104 is the result of the outgoing light field generation ligh trap power of light beam in the axle center core 102; Act as the particle of catching is pushed away optical fiber end, 105 is the result that the outgoing light field of light beam in the toroidal cores 101 produces ligh trap power, act as the particle of the catching optical fiber end that furthers.Locate the ratio of luminous power in two fibre cores 101,102 through regulating the wavelength that injects light source, make to be of coupled connections; Change ligh trap power 104 and 105 force action effect, promptly otherwise pulling force preponderate the function of embodiment " gulping down "; Thrust is preponderated, and embodies the function of " telling ".
Fig. 7 be adopt wavelength-tunable LD light source lead the system architecture synoptic diagram of the throughput type fiber optical tweezer of microstructured optical fibers based on coaxial double wave.Among the figure, 1 is that coaxial double wave leaded light is fine, and 101 is annular fibre core; 102 is the axle center fibre core; The two distributes with one heart, and 8 is wavelength-tunable LD light source, 5 common standard single mode single-core fibers; 7 are the fine fused biconical taper of single-core fiber and the coaxial double wave leaded light position that is of coupled connections, the 103rd, and be the optical fiber end of catching fine gtinding of realization to fine particle.
Fig. 8 is the throughput type fiber optical tweezers system isoboles based on coaxial double wave leaded light fibre that adopts wavelength-tunable LD light source.Among the figure, 101 is annular fibre core, and 102 is the axle center fibre core, and 8 is wavelength-tunable LD light source, 5 common standard single mode single-core fibers, and 7 are single-core fiber and the coaxial double wave leaded light fibre fused biconical taper position that is of coupled connections.
First kind of preparation method of the throughput type fiber optical tweezer based on coaxial twi guide structure of the present invention is:
In conjunction with Fig. 1, throughput type fiber optical tweezer of the present invention comprises that 1 for having the optical fiber of coaxial twi guide structure; 101 is the ring light fibre core; 102 with the round fiber cores that is positioned at fiber optic hub of the coaxial distribution of toroidal cores, 2 and 3 throughput type fiber optical tweezers system light sources; 4 WDM devices; 5 common standard single-mode fibers; The 103rd, the centrum optical fiber front end that obtains through attrition process.The semi-cone angle α of described cone is controlled at pi/2-arcsin (n
Liquid/ n
CoreIn the scope of)＜α＜pi/2.
The manufacturing process of the optical micro hand of this embodiment:
Step 4, throughput operation: combine Fig. 5 and 6,, make that the luminous power ratio in two fibre cores 101,102 changes, realize the function of handling up of this light tweezer through regulating two input light source light power.
First kind of preparation method of the throughput type fiber optical tweezer based on coaxial twi guide structure of the present invention is:
Different with first kind of preparation method is, two light sources here can be replaced by the LD light source 8 of wavelength-tunable, and the light source light wavelength coverage is at λ
3～λ
4In the scope.In conjunction with Fig. 7,1 for having the optical fiber of coaxial twi guide structure; 101 is the ring light fibre core; 102 with the round fiber cores that is positioned at fiber optic hub of the coaxial distribution of toroidal cores, 2 throughput type fiber optical tweezers system light sources; 5 common standard single-mode fibers; 7 are the be of coupled connections position of standard single-mode fiber with coaxial double wave leaded light fine 1; The 103rd, the centrum optical fiber front end that obtains through attrition process.The semi-cone angle α of described cone is controlled at pi/2-arcsin (n
Liquid/ n
CoreIn the scope of)＜α＜pi/2.
The manufacturing process of the optical micro hand of this embodiment:
Step 4, throughput operation: combine Fig. 8 and 6, system adopts the adjustable LD light source 2 of light source, through regulating the light source light wave, makes that the luminous power ratio in two fibre cores 101,102 changes, and realizes the function of handling up of this light tweezer.
Claims (2)
1. throughput type fiber optical tweezer based on coaxial twi guide structure, mainly by coaxial double wave lead microstructured optical fibers [1], output wavelength is λ
1LD light source [2], output wavelength be λ
2LD light source [3], WDM device [4] and standard single-mode fiber [5] form; It is characterized in that: output wavelength is λ
1LD light source [2] and output wavelength be λ
2The output terminal of LD light source [3] be connected with two input ends of WDM device [4]; The output terminal of WDM device [4] is led microstructured optical fibers [1] with coaxial double wave and is of coupled connections; Said be of coupled connections be in coupling process, keep watch on be coupled into coaxial double wave and lead light distribution, the luminous power in being coupled into two waveguide core in the microstructured optical fibers [1] and equate till, the other end that coaxial double wave is led microstructured optical fibers [1] is prepared into cone structure through fine gtinding;
Described coaxial double wave is led microstructured optical fibers [1] and is comprised a disc waveguide fibre core [101] and a circular waveguide fibre core [102]; Circular waveguide fibre core [102] is positioned at the center; Disc waveguide fibre core [101] is positioned at outside the circular waveguide fibre core [102], and disc waveguide fibre core [101] and circular waveguide fibre core [102] are coaxial;
The angular range of the semi-cone angle α of described cone structure is: pi/2-arcsin (n
Liquid/ n
Core)＜α＜pi/2; Wherein: n
CoreBe fiber core refractive index, n
LiquidBe liquid refractivity.
2. preparation method based on the throughput type fiber optical tweezer of coaxial twi guide structure is characterized in that:
Step 1, light source injects: with output wavelength is λ
1LD light source [2] and output wavelength be λ
2LD light source [3] and WDM device [4] after conventional the connection; One end of coaxial double wave being led microstructured optical fibers [1] carries out overlay removal, cutting; Carrying out fused biconical taper with the standard single-mode fiber [5] of WDM device output terminal then is of coupled connections; Carry out optical power monitoring in the process, the luminous power in being coupled to coaxial double wave leaded light fibre stops to draw awl when reaching maximum and equal; Described coaxial double wave is led microstructured optical fibers [1] and is comprised a disc waveguide fibre core [101] and a circular waveguide fibre core [102]; Circular waveguide fibre core [102] is positioned at the center; Disc waveguide fibre core [101] is positioned at outside the circular waveguide fibre core [102], and disc waveguide fibre core [101] and circular waveguide fibre core [102] are coaxial;
Step 2, cone are ground: will carry out fine gtinding through the other end that the coaxial double wave after step 1 operation is led microstructured optical fibers [1], and become cone shape [103], semi-cone angle α is controlled at pi/2-arcsin (n
Liquid/ n
CoreIn the scope of)＜α＜pi/2, wherein: n
CoreBe fiber core refractive index, n
LiquidBe liquid refractivity;
Step 3, cone polishing: ground optical fiber cone is polished, be placed on cleaning, dry for standby in the ultrasonic cleaning tank;
Step 4, throughput operation: through regulating two input light source light power, the luminous power ratio that makes coaxial double wave lead in two fibre cores of microstructured optical fibers [1] changes, and realizes the function of handling up of this light tweezer.
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| CN101950049B (en) * | 2010-07-02 | 2012-07-11 | 哈尔滨工程大学 | Throughput type fiber optical tweezers based on coaxial dual-waveguide structure and dynamic control method |
| CN104001692B (en) * | 2014-05-16 | 2016-03-02 | 中南大学 | A kind of device and method based on holographic optical tweezer principle cleaning material |
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| CN112068248B (en) * | 2020-09-28 | 2022-02-08 | 四川天邑康和通信股份有限公司 | Method for assembling wavelength division multiplexing device |
| CN113834764A (en) * | 2021-08-26 | 2021-12-24 | 桂林电子科技大学 | Optical fiber riffle system for particle directional ejection and control method |
| CN113970808B (en) * | 2021-11-18 | 2024-08-23 | 嘉兴微智光子科技有限公司 | Preparation method for mode field conversion coupling structure and preparation structure thereof |
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| CN100507620C (en) * | 2007-08-08 | 2009-07-01 | 哈尔滨工程大学 | Small core diameter ultra-high numerical aperture cone optical fiber optical tweezers and manufacturing method thereof |
| CN100498394C (en) * | 2007-10-26 | 2009-06-10 | 哈尔滨工程大学 | Double core single optical fiber optical tweezers for capturing minute particle and its manufacture method |
| CN101950049B (en) * | 2010-07-02 | 2012-07-11 | 哈尔滨工程大学 | Throughput type fiber optical tweezers based on coaxial dual-waveguide structure and dynamic control method |
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