CN104777619A - Optical fiber coupling output laser spot homogenizing device and preparation method thereof - Google Patents
Optical fiber coupling output laser spot homogenizing device and preparation method thereof Download PDFInfo
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- CN104777619A CN104777619A CN201410020211.1A CN201410020211A CN104777619A CN 104777619 A CN104777619 A CN 104777619A CN 201410020211 A CN201410020211 A CN 201410020211A CN 104777619 A CN104777619 A CN 104777619A
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- optical fiber
- flexible pipe
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- semiconductor laser
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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
- G02B27/0916—Adapting the beam shape of a semiconductor light source such as a laser diode or an LED, e.g. for efficiently coupling into optical fibers
- G02B27/0922—Adapting the beam shape of a semiconductor light source such as a laser diode or an LED, e.g. for efficiently coupling into optical fibers the semiconductor light source comprising an array of light emitters
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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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
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Abstract
The invention provides an optical fiber coupling output laser spot homogenizing device which comprises an optical fiber axially penetrating through a flexible pipe, wherein a protection pipe is arranged at the outer part of the flexible pipe, and the protection pipe and the optical fiber are coaxially mounted. By heating the flexible pipe, the flexible pipe shrinks due to heating, which is equivalent to the fact that a stress is applied to the optical fiber sleeved by the flexible pipe, so that the optical fiber uniformly and continuously deforms, the deformation can change the distribution of laser energy inside the optical fiber in each mode, such that light is relatively uniformly distributed in each mode of the multi-mode optical fiber, and thus spot of the output light beam is relatively uniform and the phenomena of ringing and speckling are improved. The device is simple to operate and high in applicability, and is especially suitable for an optical fiber coupling output semiconductor laser.
Description
Technical field
The present invention relates to a kind of coupling fiber output laser light spot homogenizing device and preparation method thereof, belong to the technical field of fiber optics.
Background technology
The semiconductor laser exported through multimode optical fiber is all widely used in a lot of field, such as laser marking, cut, laser lighting, diode-end-pumped solid state laser etc.All require that beam distribution is even in a lot of application aspect, owing to having multiple high-order mode distribution form when laser transmits in multimode optical fiber, outgoing laser beam is caused to there is the phenomenon of hot spot band, skewness, and mutually interfere between light beam, form the interference imaging point of arbitrariness, be called " speckle ".And the field such as night vision, illumination requires hot spot even, without speckle phenomena, so the laser that multimode optical fiber exports is when this serial field uses, have some limitations.
Make multimode optical fiber outgoing laser beam hot spot evenly laser transmission mode distribution in a fiber can be changed by coiling, apply the methods such as stress to optical fiber, thus improve hot spot distribution.Such as, Chinese patent document CN101630045 discloses a kind of device improving spacial distribution of output beams of multimode fibers, this device is made up of two workpiece with relief staggered relatively, clamping one section of optical fiber in the middle of workpiece, by applying pressure to these two workpiece, make the multimode optical fiber of transmission laser in very short length, be subject to the external carbuncle of single-point, multiple spot or continuous distribution, change the communication mode distribution of light in multimode optical fiber, thus reach the effect of homogenize hot spot.The method external force extrudes optical fiber, easily causes optical fiber to damage and energy loss, and increases pressurizing unit on the transmission fiber, affect product appearance.
Patent 201310414162.5, discloses a kind of method by carrying out melt-processed to manufacture to optical fiber to light spot homogenizing device.The main technical schemes of the method is removed by optical fiber coating, then carries out 1300 ~ 1500 DEG C of thermal treatments to the position of removing coat, after making the optical fiber of removal coat reach molten condition, treat that it cools.Inside of optical fibre can produce the micron-size crystalline point of the stochastic distribution that some occur because of thermal treatment, utilizes light beam to realize the effect of light spot homogenizing by the scattering of these crystallization points.But the method is by fiber core melting together with covering, light beam, through crystallization point scattering fiber, changes original angle of divergence of laser after fiber.
Chinese patent 103364956A (CN201210088322.7) proposes a kind of by applying the space distribution that stress improves optical fiber Output of laser light beam to optical fiber, fiber light beam is carried out to the method and apparatus of homogenize dissipation spot.The method brings by vibrations motor the interference speckle that the slight vibrations of optical fiber come on homogenize shadow surface.This device comprises base, optical fiber, optical fiber compactor, vibroseis, and its major defect is the volume that additional shaking device adds laser instrument, affects it and uses dirigibility.
U.S. patent documents 6810175 proposes a kind of homogenize output beam energy, makes hot spot become the method for flat-top hot spot.The main technical schemes of the method is one end laser being first coupled into a graded index fiber, and the step optical fiber phase welding that the other end of graded index fiber is larger with numerical aperture, bending coiling is carried out to step optical fiber simultaneously, pattern is mixed, Output of laser energy even is distributed, thus obtains flat-top distribution hot spot.The shortcoming of this device is that implementation is complicated, and required device volume is large, and installation difficulty is large, is unfavorable for batch production.
Chinese patent document CN102012564A proposes a kind of method for homogenizing output light spots of optical fiber coupling output semiconductor laser; that one end of mixed mold materials is fixed on lock pin; then optical fiber and mixed mold materials are intertwined; observe hot spot simultaneously; make it without the dark heart, without the ring of light and electric torch phenomenon; finally fix both relative positions, install connector and put protective casing.The method increases mixed mold materials and increases casing diameter in fiber optic protection sleeve pipe, and the hardness of laser instrument tail optical fiber also can increase greatly, not easily bends during use, because this reducing the dirigibility of laser instrument putting position.
Summary of the invention
Not enough for prior art, the invention provides a kind of device of coupling fiber output laser light spot homogenizing.Application the present invention can effectively improve hot spot band, speckle phenomena, carries out homogenize to hot spot.
The present invention also provides a kind of preparation method of said apparatus.
Technical scheme of the present invention is as follows:
A kind of coupling fiber output semiconductor laser light spot homogenizing device, comprises the optical fiber axially across flexible pipe, has the protection tube installed with described optical fiber coaxial in described flexible pipe outer setting.
Preferred according to the present invention, described fibre diameter is 100-1000 μm.
Preferred according to the present invention, in described flexible pipe, described optical fiber is arranged in flexible pipe perpendicular to optical fiber direction by two stiff ends.
Preferred according to the present invention, described stiff end is glue or metal clasp, and described glue is epoxy resin.
Preferred according to the present invention, described flexible pipe is heat-shrink tube or the pvc pipe with heat shrinkable characteristic.
Preferred according to the present invention, described flexible pipe is closed cylinder.
Preferred according to the present invention, described protection tube is Polyvinylchloride (i.e. PVC) material.
Preferred according to the present invention, described protection tube is the cylindric pipe box of band armor.
Preferred according to the present invention, described protection tube diameter is greater than flexible pipe diameter.
Preferred according to the present invention, described optical fiber is respectively fixed by a connector by the two ends of described protection tube.
A preparation method for above-mentioned coupling fiber output semiconductor laser light spot homogenizing device, comprises the following steps:
(1) optical fiber is penetrated in flexible pipe, respectively expose the cylindric optical fiber of a segment length 5cm at the two ends of flexible pipe, the two ends of this flexible pipe and optical fiber glue or metal clasp are fixedly mounted;
(2) the optical fiber heating of flexible pipe will be fixed with;
(3) optical fiber being fixed with flexible pipe after heating is put into the protection tube of about 4cm shorter in optical fiber;
(4) optical fiber two ends are respectively removed the coat of long 5cm, expose bare fibre;
(5) the above-mentioned cylindrical bare fibre exposed is penetrated in the connector of encapsulating, each exposed portion, two ends bare fibre, and connector and protection tube are fixed;
(6) connector putting on optical fiber is placed on curing oven, solidifies 10min at 130 DEG C of temperature, make glue curing;
(7) after solidification, the cylindrical fiber exposed in connector outside is removed, form fiber end face, fiber end face is ground, obtains the optical flat vertical with fiber optic hub axle, make homogenizer;
(8), when using, one end of described homogenizer is directly coupled with laser instrument or docks with laser instrument module connector with flange.
Preferred according to the present invention, the baking oven that in described step (2), optical fiber puts into 80-100 DEG C heats 10-20min.
Preferred according to the present invention, in described step (5), the length of exposed portion bare fibre is 1-5mm.
Preferred according to the present invention, described connector is conventional FC lock pin, FC lock pin, SMA lock pin or ST lock pin.
Beneficial effect of the present invention:
1, coupling fiber output laser light spot homogenizing device of the present invention is by heating flexible pipe, make flexible pipe heat shrinkable, be equivalent to apply stress to the optical fiber be enclosed within flexible pipe, thus cause optical fiber that even, continuous print deformation occurs, this deformation can change the distribution in the various modes of inside of optical fibre laser energy, make light more even in the distribution of each pattern of multimode optical fiber, thus make the hot spot of output beam more even, improve band, speckle phenomena.
2, the scope applying stress can be in whole length of optical fiber, also can be, on partial-length, from the appearance do not go out any change, therefore convenient, practical.
Accompanying drawing explanation
Fig. 1 is the optical fiber fixing flexible pipe;
Fig. 2 is the distribution figure of optical fiber in flexible pipe after heating;
Fig. 3 be by heating after optical fiber install the diagram of connector;
Fig. 4 is the design sketch of optical fiber described in embodiment to the homogenize hot spot of light beam;
Fig. 5 is that comparative example states the design sketch of optical fiber to the homogenize hot spot of light beam;
In figure: 1, optical fiber; 2, flexible pipe; 3, stiff end; 4, protection tube; 5, connector.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail, but is not limited thereto.
Embodiment 1,
As Figure 1-3, a kind of coupling fiber output semiconductor laser light spot homogenizing device, comprises the optical fiber 1 axially across flexible pipe 2, has the protection tube 4 with the coaxial installation of described optical fiber 1 in described flexible pipe 2 outer setting.
The diameter of described optical fiber 1 is 125 μm.
In described flexible pipe 2, described optical fiber 1 is arranged in flexible pipe 2 perpendicular to optical fiber 1 direction by two stiff ends 3.
Described stiff end 3 is glue.
Described glue is epoxy resin.
Described flexible pipe 2 is heat-shrink tube.
Described flexible pipe 2 is closed cylinder.
Described protection tube 4 is Polyvinylchloride (i.e. PVC) materials.
Described protection tube 4 is cylindric pipe boxes of band armor.
Described protection tube 4 diameter is greater than flexible pipe 2 diameter.
Described optical fiber 1 is respectively fixed by a connector 5 by the two ends of described protection tube 4.
Embodiment 2,
A kind of coupling fiber output semiconductor laser light spot homogenizing device as described in Example 1, its difference is, the diameter of described optical fiber 1 is 220 μm.
Described stiff end 3 is snap ring.
Described flexible pipe 2 is for having the pvc pipe of heat shrinkable characteristic.
Embodiment 3,
A kind of coupling fiber output semiconductor laser light spot homogenizing device as described in Example 1, its difference is, the diameter of described optical fiber 1 is 308 μm.
Described flexible pipe 2 is for having the pvc pipe of heat shrinkable characteristic.
Embodiment 4,
A kind of coupling fiber output semiconductor laser light spot homogenizing device as described in Example 1, its difference is, the diameter of described optical fiber 1 is 440 μm.
Described stiff end 3 is snap ring.
Embodiment 5,
A preparation method for coupling fiber output semiconductor laser light spot homogenizing device as described in embodiment 1-4, comprises the following steps:
(1) optical fiber 1 is penetrated in flexible pipe 2, respectively expose the cylindric optical fiber 1 of a segment length 5cm at the two ends of flexible pipe 2, the two ends of this flexible pipe 2 and optical fiber 1 glue or metal clasp are fixedly mounted;
(2) the optical fiber heating of flexible pipe 2 will be fixed with;
(3) optical fiber 1 being fixed with flexible pipe 2 after heating is put into the protection tube 4 of about 4cm shorter in optical fiber 1;
(4) optical fiber 1 two ends are respectively removed the coat of long 5cm, expose bare fibre;
(5) the above-mentioned cylindrical bare fibre exposed is penetrated in the connector 5 of encapsulating, each exposed portion, two ends bare fibre, and connector 5 and protection tube 4 are fixed;
(6) connector 5 putting on optical fiber 1 is placed on curing oven, solidifies 10min at 130 DEG C of temperature, make glue curing;
(7) after solidification, the cylindrical fiber exposed in connector 5 outside is removed, form fiber end face, fiber end face is ground, obtains the optical flat vertical with fiber optic hub axle, make homogenizer;
(8), when using, one end of described homogenizer is directly coupled with laser instrument or docks with laser instrument module connector 5 with flange.
Preferred according to the present invention, the baking oven that in described step (2), optical fiber 1 puts into 80-100 DEG C heats 10-20min.
Preferred according to the present invention, in described step (5), the length of exposed portion bare fibre is 1-5mm.
Preferred according to the present invention, described connector 5 is conventional FC lock pin, FC lock pin, SMA lock pin or ST lock pin.
Comparative example,
The optical patchcord used in this comparative example is the diameter of cylindric optical fiber, cylindric optical fiber is identical in length and material and embodiment 1, and the light beam parameters of the laser light source adopted is also identical with embodiment 1.
CCD is adopted to record spot pattern, contrast test is used as to the homogenize hot spot of optical fiber described in embodiment 1 and existing cylindric optical fiber: Fig. 4 is the design sketch of optical fiber described in embodiment 1 to the homogenize hot spot of light beam, in Fig. 4, spot center speckle obviously reduces, and hot spot becomes evenly; And Fig. 5 is comparative example states the design sketch of optical fiber to the homogenize hot spot of light beam, in Fig. 5 there is obvious band and speckle in hot spot.
In sum, utilize the device comparatively ordinary optic fibre transmitting beam prepared by the present invention, obviously even than the beam and focus of ordinary optic fibre transmission, band and speckle phenomena obviously reduce.
Claims (10)
1. a coupling fiber output semiconductor laser light spot homogenizing device, is characterized in that, this device comprises the optical fiber axially across flexible pipe, has the protection tube installed with described optical fiber coaxial in described flexible pipe outer setting.
2. a kind of coupling fiber output semiconductor laser light spot homogenizing device according to claim 1, it is characterized in that, described fibre diameter is 100-1000 μm.
3. a kind of coupling fiber output semiconductor laser light spot homogenizing device according to claim 1, it is characterized in that, in described flexible pipe, described optical fiber is arranged in flexible pipe perpendicular to optical fiber direction by two stiff ends.
4. a kind of coupling fiber output semiconductor laser light spot homogenizing device according to claim 1, it is characterized in that, described stiff end is glue or metal clasp, and described glue is epoxy resin.
5. a kind of coupling fiber output semiconductor laser light spot homogenizing device according to claim 1, it is characterized in that, described flexible pipe is heat-shrink tube or the pvc pipe with heat shrinkable characteristic; Described flexible pipe is closed cylinder.
6. a kind of coupling fiber output semiconductor laser light spot homogenizing device according to claim 1, it is characterized in that, described protection tube is Polyvinylchloride (i.e. PVC) material; Described protection tube is the cylindric pipe box of band armor; Described protection tube diameter is greater than flexible pipe diameter.
7. a kind of coupling fiber output semiconductor laser light spot homogenizing device according to claim 1, it is characterized in that, described optical fiber is respectively fixed by a connector by the two ends of described protection tube.
8. the preparation method of coupling fiber output semiconductor laser light spot homogenizing device as described in claim 1-8, comprises the following steps:
(1) optical fiber is penetrated in flexible pipe, respectively expose the cylindric optical fiber of a segment length 5cm at the two ends of flexible pipe, the two ends of this flexible pipe and optical fiber glue or metal clasp are fixedly mounted;
(2) the optical fiber heating of flexible pipe will be fixed with;
(3) optical fiber being fixed with flexible pipe after heating is put into the protection tube of about 4cm shorter in optical fiber;
(4) optical fiber two ends are respectively removed the coat of long 5cm, expose bare fibre;
(5) the above-mentioned cylindrical bare fibre exposed is penetrated in the connector of encapsulating, each exposed portion, two ends bare fibre, and connector and protection tube are fixed;
(6) connector putting on optical fiber is placed on curing oven, solidifies 10min at 130 DEG C of temperature, make glue curing;
(7) after solidification, the cylindrical fiber exposed in connector outside is removed, form fiber end face, fiber end face is ground, obtains the optical flat vertical with fiber optic hub axle, make homogenizer;
(8), when using, one end of described homogenizer is directly coupled with laser instrument or docks with laser instrument module connector with flange.
9. the preparation method of coupling fiber output semiconductor laser light spot homogenizing device according to claim 1, is characterized in that, the baking oven that optical fiber puts into 80-100 DEG C in described step (2) heats 10-20min; In described step (5), the length of exposed portion bare fibre is 1-5mm.
10. the preparation method of coupling fiber output semiconductor laser light spot homogenizing device according to claim 1, is characterized in that, described connector is conventional FC lock pin, FC lock pin, SMA lock pin or ST lock pin.
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| CN201410020211.1A CN104777619B (en) | 2014-01-09 | 2014-01-09 | A kind of fiber coupling output laser light spot homogenizing device and preparation method thereof |
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| CN201410020211.1A CN104777619B (en) | 2014-01-09 | 2014-01-09 | A kind of fiber coupling output laser light spot homogenizing device and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031979A (en) * | 2019-05-21 | 2019-07-19 | 中国工程物理研究院流体物理研究所 | Light spot homogenizing expands method and device |
| CN111092359A (en) * | 2019-12-27 | 2020-05-01 | 安图实验仪器(郑州)有限公司 | Laser system for matrix-assisted laser desorption ionization time-of-flight mass spectrometer |
| CN112748499A (en) * | 2019-10-30 | 2021-05-04 | 山东华光光电子股份有限公司 | Optical fiber manufacturing method for improving light spot homogenization |
| CN114006246A (en) * | 2021-10-27 | 2022-02-01 | 光惠（上海）激光科技有限公司 | Laser with high-power multi-mode beam combiner |
| CN114400498A (en) * | 2022-02-18 | 2022-04-26 | 山东华光光电子股份有限公司 | Semiconductor laser capable of improving uniformity of output light spots and preparation method thereof |
| CN115813548A (en) * | 2022-11-30 | 2023-03-21 | 南京春辉科技实业有限公司 | Medical photoelectric composite cable and medical laser equipment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031979A (en) * | 2019-05-21 | 2019-07-19 | 中国工程物理研究院流体物理研究所 | Light spot homogenizing expands method and device |
| CN112748499A (en) * | 2019-10-30 | 2021-05-04 | 山东华光光电子股份有限公司 | Optical fiber manufacturing method for improving light spot homogenization |
| CN111092359A (en) * | 2019-12-27 | 2020-05-01 | 安图实验仪器(郑州)有限公司 | Laser system for matrix-assisted laser desorption ionization time-of-flight mass spectrometer |
| CN114006246A (en) * | 2021-10-27 | 2022-02-01 | 光惠（上海）激光科技有限公司 | Laser with high-power multi-mode beam combiner |
| CN114006246B (en) * | 2021-10-27 | 2022-07-15 | 光惠（上海）激光科技有限公司 | Laser with high-power multi-mode beam combiner |
| CN114400498A (en) * | 2022-02-18 | 2022-04-26 | 山东华光光电子股份有限公司 | Semiconductor laser capable of improving uniformity of output light spots and preparation method thereof |
| CN115813548A (en) * | 2022-11-30 | 2023-03-21 | 南京春辉科技实业有限公司 | Medical photoelectric composite cable and medical laser equipment |
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