CN103575930A - Method and device for manufacturing light trap with hollow photonic crystal fiber - Google Patents
Method and device for manufacturing light trap with hollow photonic crystal fiber Download PDFInfo
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Abstract
The invention discloses a method and device for manufacturing a light trap with a hollow photon crystal fiber. The two ends of the hollow photonic crystal fiber are connected with the emission ends of two single mode fibers in a butt fusion mode. Afterwards, fundamental mode gauss beams emitted from the two single mode fibers are used for binding globular particles in a hollow fiber core in the hollow photonic crystal fiber, and therefore the globular particles are stressed and balanced in the light trap. The gauss beams are transmitted towards each other. The light power of the different single mode fibers is changed and the light trapping force exerted on the globular particles is changed. The acceleration and the motion displacement of the globular particles are controlled. The device comprises a substrate of a fiber light trap system, the two single mode fibers, the hollow photonic crystal fiber, a coupler, a light intensity modulator, a laser device, a photoelectricity image detector, a computer and like. According to the method and device for manufacturing the light trap with the hollow photonic crystal fiber, the energy utilization rate of the laser beams and the registration precision of the laser beams are improved and the influences on the motion state of the globular particles by Brownian movement in liquid are avoided.
Description
Technical field
The present invention relates to optics inertial navigation and optical engineering field, relate in particular to a kind of method and device that utilizes Hollow-Core Photonic Crystal Fibers to prepare ligh trap.
Background technology
By the known light beam of quantum theory, be that a group moves, has the photon stream of momentum with the light velocity.When light beam, at dielectric surface, refraction and reflex time occurs, the speed of photon and direction change, and cause the conversion of its momentum vector.According to the momentum converted quantity of law of conservation of momentum photon, equal the momentum change amount of spheroidal particle, so the momentum respective change of spheroidal particle is also that light beam exists the effect of power to spheroidal particle, is called optical radiation and presses.Comprised along the scattering force of direction of beam propagation and always pointed to light intensity compared with the gradient force of strength.Under the effect of these two power, light beam can catch spheroidal particle in certain area, makes it be stabilized in certain ad-hoc location, and this region is called ligh trap.
The method that tradition is prepared fiber-optic trap is: spheroidal particle is placed in to the central authorities of glass substrate " ten " font groove, in the single-mode fiber that in the single-mode fiber of putting by four " ten " fonts at two-dimensional space, aiming in opposite directions, the Gaussian beam of outgoing or two " one " fonts are put, aimed in opposite directions, the Gaussian beam of outgoing applies ligh trap power to the spheroidal particle in liquid.
The shortcoming that tradition is prepared fiber-optic trap method is: spheroidal particle is subject to Brownian movement and near equilibrium position, does random motion in liquid environment, affects the action effect of ligh trap power; Same spheroidal particle aimed in opposite directions by the two pairs of single-mode fibers or a pair of single-mode fiber is aimed at same spheroidal particle in opposite directions, and alignment precision is very strict and catch difficulty and increase; Single-mode fiber doping high purity silicon fibre core, optical fiber property and parameter all will be subject to the impact of silicon materials relevant parameter as damage threshold, decay, nonlinear effect and GVD (Group Velocity Dispersion) etc., the ligh trap acting force that single-mode fiber emitting laser energy loss great ， unit luminous power produces is little.
Summary of the invention
In order to overcome the deficiencies in the prior art, the object of this invention is to provide a kind of method and device that utilizes Hollow-Core Photonic Crystal Fibers to prepare ligh trap.
A kind of method of utilizing Hollow-Core Photonic Crystal Fibers to prepare ligh trap, the two ends of Hollow-Core Photonic Crystal Fibers and the welding of two single-mode fiber exit ends, then utilize the fundamental-mode gaussian beam of outgoing in two single-mode fibers propagating in opposite directions, spheroidal particle is strapped in the hollow fibre core of Hollow-Core Photonic Crystal Fibers, therefore spheroidal particle reaches stress balance in ligh trap; Change the size of luminous power in different single-mode fibers, change the ligh trap power that spheroidal particle is subject to, control acceleration and the moving displacement of spheroidal particle.
Utilize Hollow-Core Photonic Crystal Fibers to prepare a device for ligh trap, comprise the first single-mode fiber, the second single-mode fiber, Hollow-Core Photonic Crystal Fibers, the glass substrate with groove, the first fiber coupler, the second fiber coupler, the first light intensity modulator, the second light intensity modulator, the first laser instrument, second laser, photoelectric image detector, computing machine; Computing machine, with video acquisition device, obtains the video information of photoelectric image detector by video acquisition device; Spheroidal particle is placed in the hollow fibre core of described Hollow-Core Photonic Crystal Fibers; The output terminal of the first single-mode fiber, the second single-mode fiber respectively with the welding of Hollow-Core Photonic Crystal Fibers both ends of the surface, be then placed in the described glass substrate with groove, be fixed on groove; The input end of the first single-mode fiber is coupled to the first fiber coupler, and the other end of the first fiber coupler is connected with the first light intensity modulator, and the light of the first laser emitting, after the first light intensity modulator modulation, is input to the first single-mode fiber; The input end of the second single-mode fiber is coupled to the second fiber coupler, and the other end of the second fiber coupler is connected with the second light intensity modulator, and the light of second laser outgoing, after the second light intensity modulator modulation, is input to the second single-mode fiber; Photoelectric image detector is placed in the top of spheroidal particle, and to spheroidal particle imaging; Photoelectric image detector is connected with computing machine.
Preferably, there is bar linear pattern groove in the central authorities of described glass substrate, and groove becomes V face del, and V face is tangent with the cylinder of the first single-mode fiber, the second single-mode fiber, Hollow-Core Photonic Crystal Fibers respectively.
Preferably, in described groove, fill transparent ultraviolet glue.
Preferably, described photoelectric image detector comprises microcobjective and image-forming component, and described image-forming component is CCD or CMOS.
Preferably, described Hollow-Core Photonic Crystal Fibers is arranged in described groove, and its length is 1/3rd to 1/2nd of groove length.
Preferably, the first described single-mode fiber, the second single-mode fiber model are identical, and the first described single-mode fiber is identical with the core diameter of Hollow-Core Photonic Crystal Fibers.
Preferably, described spheroidal particle is the spherical particulate of silicon dioxide.
The invention has the beneficial effects as follows: optical fiber is fixed in the central linear pattern groove of glass substrate, simplifies preparation technology; Hollow optic fibre can be realized over 99% light and propagating in air rather than in glass material, thereby greatly reduces the impact of fiber optic materials characteristic on optical property and optical fiber property, has improved the capacity usage ratio of laser beam; The two ends of Hollow-Core Photonic Crystal Fibers and the welding of two single-mode fiber exit ends, improved the alignment precision of laser beam; The hollow fibre core structure of Hollow-Core Photonic Crystal Fibers inside, avoids the impact of the Brownian movement in spheroidal particle motion state liquid body in conventional optical fibers ligh trap.
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is the diagrammatic cross-section of hollow core photonic crystal fiber of the present invention;
Fig. 3 is the schematic diagram after the present invention's fixed fiber on the glass substrate of linear pattern V face groove completes;
Fig. 4 is the schematic diagram of laser beam while passing through three sections of optical fiber of apparatus of the present invention;
Wherein 1.1 is the first single-mode fiber, 1.2 is the second single-mode fiber, 2 is Hollow-Core Photonic Crystal Fibers, 3 is spheroidal particle, 4 is the glass substrate with groove, 5.1 is the first fiber coupler, 5.2 is the second fiber coupler, 6.1 is the first light intensity modulator, 6.2 is the second light intensity modulator, 7.1 is the first laser instrument, 7.2 is second laser, 8 is photoelectric image detector, 9 is computing machine, 10 is the hollow fibre core of Hollow-Core Photonic Crystal Fibers, 11 is the photonic bandgap of the hollow hole formation of Hollow-Core Photonic Crystal Fibers, 12 is the covering of Hollow-Core Photonic Crystal Fibers, 13 is the fibre core of whole optical fiber after single-mode fiber and hollow photon crystal welding, 14 is laser gaussian beam.
Embodiment
Below in conjunction with accompanying drawing, further illustrate the present invention.
Shown in Fig. 1, utilize Hollow-Core Photonic Crystal Fibers to prepare a device for ligh trap, comprise the first single-mode fiber 1.1, the second single-mode fiber 1.2, Hollow-Core Photonic Crystal Fibers 2, with glass substrate 4, the first fiber coupler 5.1, the second fiber coupler 5.2, the first light intensity modulator 6.1, the second light intensity modulator 6.2, the first laser instrument 7.1, second laser 7.2, photoelectric image detector 8, the computing machine 9 of groove; Computing machine 9, with video acquisition device, obtains the video information of photoelectric image detector 8 by video acquisition device; Spheroidal particle 3 is placed in the hollow fibre core of described Hollow-Core Photonic Crystal Fibers 2; The output terminal of the first single-mode fiber 1.1, the second single-mode fiber 1.2 respectively with Hollow-Core Photonic Crystal Fibers 2 both ends of the surface weldings, be then placed in the described glass substrate 4 with groove, be fixed on groove; The input end of the first single-mode fiber 1.1 is coupled to the first fiber coupler 5.1, the other end of the first fiber coupler 5.1 is connected with the first light intensity modulator 6.1, the light of the first laser instrument 7.1 outgoing, after the first light intensity modulator 6.1 modulation, is input to the first single-mode fiber 1.1; The input end of the second single-mode fiber 1.2 is coupled to the second fiber coupler 5.2, the other end of the second fiber coupler 5.2 is connected with the second light intensity modulator 6.2, the light of second laser 7.2 outgoing, after the second light intensity modulator 6.2 modulation, is input to the second single-mode fiber 1.2; Photoelectric image detector 8 is placed in the top of spheroidal particle 3, and to spheroidal particle imaging; Photoelectric image detector 8 is connected with computing machine 9.
Shown in Fig. 2, Hollow-Core Photonic Crystal Fibers structure is divided into three layers, be the hollow fibre core 10 of Hollow-Core Photonic Crystal Fibers, the photonic bandgap 11 that the hollow hole of Hollow-Core Photonic Crystal Fibers forms, the covering 12 of Hollow-Core Photonic Crystal Fibers, because the core diameter of Hollow-Core Photonic Crystal Fibers is at 7 ~ 14 microns, the core diameter of 125 microns of single-mode fibers is at 8 ~ 10 microns, in order to improve the sensitivity of spheroidal particle to displacement, convenient observation, conventionally select the diameter of the spherical particulate of silicon dioxide at 2 ~ 4 microns, quality is 10
-9--10
-7gram.
Method of the present invention is: the two ends of Hollow-Core Photonic Crystal Fibers and the welding of two single-mode fiber exit ends, then utilize the fundamental-mode gaussian beam of outgoing in two single-mode fibers propagating in opposite directions, spheroidal particle is strapped in the hollow fibre core of Hollow-Core Photonic Crystal Fibers, therefore spheroidal particle reaches stress balance in ligh trap.Change the size of luminous power in different single-mode fibers, change the ligh trap power that spheroidal particle is subject to, control acceleration and the moving displacement of spheroidal particle.
Principle of work of the present invention is:
The light beam of two single-mode fiber 1 end face outgoing is propagated in opposite directions in Hollow-Core Photonic Crystal Fibers 2, spherical silicon dioxide spheroidal particle 3 in hollow 2 fibre cores of Hollow-Core Photonic Crystal Fibers is caught, it is stabilized near certain position of optical axis direction, because fiber coupler 5 and the inhomogeneous spherical silicon dioxide spheroidal particle 3 that causes of fused fiber splice can not rest on the center of Hollow-Core Photonic Crystal Fibers 2, and depart from center certain distance, this position is equilibrium position.Regulate the size of luminous power in different single-mode fibers, the luminous power that is about to a light intensity modulator 6 tunes up, the luminous power of another light intensity modulator 6 is constant, because varying in size, the luminous power of outgoing in single-mode fiber 1 causes varying in size of ligh trap power, the spherical particulate 3 of captive silicon dioxide can be to the little lateral movement of luminous power, utilize the image-forming component of photoelectric image detector 6 to obtain spheroidal particle 3 sport videos, and send computing machine 9 to by video frequency collection card, on computing machine 9, observe the motion state of spheroidal particle 3.Because the spherical particulate 3 of silicon dioxide is subject to along the scattering force of direction of beam propagation and always points to light intensity compared with the gradient force of strength, and light distribution is inhomogeneous, sensing light intensity is large two orders of magnitude of scattering force along direction of beam propagation compared with the gradient force ratio of strength, make the motion of spheroidal particle 3 mainly be subject to the effect of the radial gradient power of relative laser beam, captive spherical silicon dioxide spheroidal particle 3 is rotatablely moved in the inhomogeneous and situation that varies in size respectively in two laser beam light intensity, on computing machine 9, observe the motion state of spheroidal particle 3.
Embodiment
A kind of concrete steps of utilizing Hollow-Core Photonic Crystal Fibers to prepare the device of ligh trap are:
One, make glass substrate 4, spheroidal particle 3 is placed in the hollow fibre core of Hollow-Core Photonic Crystal Fibers 2, two single-mode fibers, 1 outgoing end face is connected with Hollow-Core Photonic Crystal Fibers 2 meltings, three optical fiber are fixed on by transparent ultraviolet glue in the V-type groove of glass substrate 4, and after this step completes, accompanying drawing 3 is shown in by the schematic diagram of the glass substrate of made;
Two, glass substrate 4 levels are placed in to photoelectric image detector 8 times, open photoelectric image detector 8, computing machine 9 and video acquisition software, the microcobjective of photoelectric image detector 8 is placed in minimum multiplying power, position from three-dimensional coarse adjustment glass substrate 4, make to show in video acquisition software that the picture of Hollow-Core Photonic Crystal Fibers 2 is clear, secondly microcobjective is placed in larger multiplying power and finely tunes microcobjective, makes the picture of the spheroidal particle 3 that shows in video acquisition software clear;
Three, open laser instrument 7, regulate laser instrument 7 to make the luminous power of two laser instrument 7 outgoing equal sizes, open light intensity modulator 6, regulate two light intensity modulators 6 to make the optical modulation of laser instrument 7 outgoing become the strong identical two-beam of two-beam, two light beams are input to respectively in two single-mode fibers 1;
Four, horizontal positioned glass substrate 4, regulate light intensity modulator 6, make the luminous power of two bundle laser different, make slowly mobile certain position that is finally stabilized in Hollow-Core Photonic Crystal Fibers 2 hollow fibre cores of spheroidal particle 3, single-mode fiber and hollow photon crystal welding afterwards whole optical fiber fibre core 13 and when stable schematic diagram during the three piece optical fiber of laser gaussian beam 14 by apparatus of the present invention see accompanying drawing 4;
Five, glass substrate 4 is vertically placed, optical fiber direction is also vertical, photoelectric image detector 8 is positioned at the same side with glass substrate 9 planes, regulate light intensity modulator 6, make the laser intensity of spheroidal particle 3 tops be greater than the laser intensity of below, when the synthetic ligh trap power that spheroidal particle 3 is subject to and gravitational equilibrium, in video acquisition software, show that spheroidal particle 3 moves and stablize in this equilibrium position.
Disclosed is above only specific embodiments of the invention, but the present invention is not limited thereto, and the changes that any person skilled in the art can think of, all should drop on protection scope of the present invention.
Claims (8)
1. a method of utilizing Hollow-Core Photonic Crystal Fibers to prepare ligh trap, it is characterized in that: the two ends of Hollow-Core Photonic Crystal Fibers and the welding of two single-mode fiber exit ends, then utilize the fundamental-mode gaussian beam of outgoing in two single-mode fibers propagating in opposite directions, spheroidal particle is strapped in the hollow fibre core of Hollow-Core Photonic Crystal Fibers, therefore spheroidal particle reaches stress balance in ligh trap; Change the size of luminous power in different single-mode fibers, change the ligh trap power that spheroidal particle is subject to, control acceleration and the moving displacement of spheroidal particle.
2. utilize Hollow-Core Photonic Crystal Fibers to prepare a device for ligh trap, it is characterized in that: comprise the first single-mode fiber (1.1), the second single-mode fiber (1.2), Hollow-Core Photonic Crystal Fibers (2), the glass substrate (4) with groove, the first fiber coupler (5.1), the second fiber coupler (5.2), the first light intensity modulator (6.1), the second light intensity modulator (6.2), the first laser instrument (7.1), second laser (7.2), photoelectric image detector (8), computing machine (9); Computing machine (9), with video acquisition device, obtains the video information of photoelectric image detector (8) by video acquisition device; Spheroidal particle (3) is placed in the hollow fibre core of described Hollow-Core Photonic Crystal Fibers (2); The output terminal of the first single-mode fiber (1.1), the second single-mode fiber (1.2) respectively with Hollow-Core Photonic Crystal Fibers (2) both ends of the surface welding, be then placed in the described glass substrate with groove (4), be fixed on groove; The input end of the first single-mode fiber (1.1) is coupled to the first fiber coupler (5.1), the other end of the first fiber coupler (5.1) is connected with the first light intensity modulator (6.1), the light of the first laser instrument (7.1) outgoing, after the first light intensity modulator (6.1) modulation, is input to the first single-mode fiber (1.1); The input end of the second single-mode fiber (1.2) is coupled to the second fiber coupler (5.2), the other end of the second fiber coupler (5.2) is connected with the second light intensity modulator (6.2), the light of second laser (7.2) outgoing, after the second light intensity modulator (6.2) modulation, is input to the second single-mode fiber (1.2); Photoelectric image detector (8) is placed in the top of spheroidal particle (3), and to spheroidal particle imaging; Photoelectric image detector (8) is connected with computing machine (9).
3. device according to claim 2, it is characterized in that: there is bar linear pattern groove in the central authorities of described glass substrate (4), groove becomes V face del, and V face is tangent with the cylinder of the first single-mode fiber (1.1), the second single-mode fiber (1.2), Hollow-Core Photonic Crystal Fibers (2) respectively.
4. device according to claim 2, is characterized in that: in described groove, fill transparent ultraviolet glue.
5. device according to claim 2, is characterized in that: described photoelectric image detector (8) comprises microcobjective and image-forming component, and described image-forming component is CCD or CMOS.
6. device according to claim 2, is characterized in that: described Hollow-Core Photonic Crystal Fibers (2) is arranged in described groove, and its length is 1/3rd to 1/2nd of groove length.
7. device according to claim 2, it is characterized in that: described the first single-mode fiber (1.1), the second single-mode fiber (1.2) model are identical, and described the first single-mode fiber (1.1) is identical with the core diameter of Hollow-Core Photonic Crystal Fibers (2).
8. device according to claim 2, is characterized in that: described spheroidal particle is the spherical particulate of silicon dioxide.
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| CN104034322B (en) * | 2014-06-19 | 2016-11-30 | 浙江大学 | Optical levitation rotor micro gyro measures the device of angular velocity |
| CN107024604A (en) * | 2017-02-18 | 2017-08-08 | 浙江大学 | A kind of totally enclosed type ligh trap sensing control unit and preparation method thereof |
| CN109004973A (en) * | 2018-07-04 | 2018-12-14 | 广州广电计量检测股份有限公司 | A kind of OTDR capability evaluating device and method |
| CN111261312A (en) * | 2020-01-18 | 2020-06-09 | 江苏锐精光电研究院有限公司 | Micro optical tweezers device and method based on self-focusing lens pair |
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| CN115938634A (en) * | 2023-03-13 | 2023-04-07 | 之江实验室 | Fine glass tube loading-based particle transfer suspension method and device |
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| CN104034322B (en) * | 2014-06-19 | 2016-11-30 | 浙江大学 | Optical levitation rotor micro gyro measures the device of angular velocity |
| CN105759073A (en) * | 2016-03-07 | 2016-07-13 | 浙江大学 | Full-closed type light trap sensing control unit and manufacturing method therefor |
| CN105759073B (en) * | 2016-03-07 | 2019-02-22 | 浙江大学 | Total closed type chip ligh trap sensing control unit and preparation method thereof |
| CN107024604A (en) * | 2017-02-18 | 2017-08-08 | 浙江大学 | A kind of totally enclosed type ligh trap sensing control unit and preparation method thereof |
| CN107024604B (en) * | 2017-02-18 | 2019-04-16 | 浙江大学 | A kind of totally enclosed type ligh trap sensing control unit and preparation method thereof |
| CN109004973A (en) * | 2018-07-04 | 2018-12-14 | 广州广电计量检测股份有限公司 | A kind of OTDR capability evaluating device and method |
| CN109004973B (en) * | 2018-07-04 | 2021-09-07 | 广州广电计量检测股份有限公司 | OTDR performance evaluation device and method |
| CN111261312A (en) * | 2020-01-18 | 2020-06-09 | 江苏锐精光电研究院有限公司 | Micro optical tweezers device and method based on self-focusing lens pair |
| CN111536960A (en) * | 2020-04-30 | 2020-08-14 | 浙江大学 | Double-ring parallel resonant gyro system and double-closed-loop digital demodulation method thereof |
| CN111536960B (en) * | 2020-04-30 | 2022-01-18 | 浙江大学 | Double-ring parallel resonant gyro system and double-closed-loop digital demodulation method thereof |
| CN115938634A (en) * | 2023-03-13 | 2023-04-07 | 之江实验室 | Fine glass tube loading-based particle transfer suspension method and device |
| CN115938634B (en) * | 2023-03-13 | 2023-06-27 | 之江实验室 | Particle transfer suspension method and device based on capillary glass tube loading |
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