CN104777619B - A kind of fiber coupling output laser light spot homogenizing device and preparation method thereof - Google Patents
A kind of fiber coupling output laser light spot homogenizing device and preparation method thereof Download PDFInfo
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- CN104777619B CN104777619B CN201410020211.1A CN201410020211A CN104777619B CN 104777619 B CN104777619 B CN 104777619B CN 201410020211 A CN201410020211 A CN 201410020211A CN 104777619 B CN104777619 B CN 104777619B
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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 present invention provides a kind of device of fiber coupling output laser light spot homogenizing, and including the optical fiber axially across flexible pipe, the protection pipe with optical fiber coaxial installation is provided with outside the flexible pipe.The present invention is by heating flexible pipe, so that flexible pipe heat shrinkable, it is equivalent to and applies stress to the optical fiber covered in flexible pipe, to cause optical fiber that uniform, continuous deformation occurs, the deformation can change the distribution of inside of optical fibre laser energy in the various modes, it is more uniform in the distribution of each mode of multimode fibre to make light, to keep the hot spot of output beam more uniform, improves band, speckle phenomena.This method is easy to operate, strong applicability, is particularly suitable for fiber coupling output semiconductor laser.
Description
Technical field
The present invention relates to a kind of fiber coupling output laser light spot homogenizing devices and preparation method thereof, belong to optical fiber optics
Technical field.
Background technique
The semiconductor laser exported through multimode fibre is all widely used in many fields, for example laser marking, laser are cut
It cuts, laser lighting, diode-end-pumped solid state laser etc..Require that beam distribution is uniform in many application aspects, by
There are a variety of high-order mode distribution forms when laser transmits in multimode fibre, cause outgoing laser beam there are hot spot band, divide
The phenomenon of cloth unevenness, and interfered between light beam, form the interference imaging point of arbitrariness, referred to as " speckle ".And night vision, illumination
Equal fields require hot spot uniform, no speckle phenomena, so the laser of multimode fibre output is in the series field in use, there are one
Fixed limitation.
Make multimode fibre outgoing laser beam hot spot more evenly can by optical fiber is coiled, is applied the methods of stress come
Change the transmission mode distribution of laser in a fiber, so as to improve hot spot distribution.For example, Chinese patent document CN101630045
Disclose a kind of device for improving spacial distribution of output beams of multimode fibers, which staggered relatively has relief by two
Workpiece constitute, one section of optical fiber is clamped among workpiece, by applying pressure to the two workpiece, makes the multimode fibre for transmitting laser
By single-point, multiple spot or continuously distributed external carbuncle in very short length, change the light communication mode in multimode fibre point
Cloth, to achieve the effect that homogenize hot spot.This method squeezes optical fiber with external force, easily causes optical fiber damage and energy damage
Consumption, and increase pressurizing unit on the transmission fiber, influence product appearance.
Patent 201310414162.5 discloses a kind of by manufacturing optical fiber progress melt-processed to light spot homogenizing device
Method.The main technical schemes of this method are to remove optical fiber coating, then carry out 1300 to the position of removal coat
~1500 DEG C of heat treatments, after making the optical fiber for removing coat reach molten condition, to its cooling.Inside of optical fibre can generate it is some because
The micron-size crystalline point of the random distribution of heat treatment and appearance, realizes that hot spot is even by the scattering of these crystalline temperatures using light beam
The effect of change.But this method melts fiber core and covering together, the crystallized point scattering fiber of light beam, changes after fiber
Original angle of divergence of laser.
Chinese patent 103364956A (CN201210088322.7) proposes a kind of by applying stress improvement to optical fiber
The spatial distribution of optical fiber output laser beam, come the method and apparatus for carrying out homogenizing dissipation spot to fiber light beam.This method be by
Vibration motor brings the slight vibration of optical fiber to homogenize the interference speckle on shadow surface.The device includes pedestal, optical fiber, optical fiber pressure
Tight device, vibroseis, major defect is the volume that additional shaking device increases laser, influences its using flexible.
U.S. patent documents 6810175 propose one kind and homogenize output beam energy, and hot spot is made to become the side of flat-top hot spot
Method.The main technical schemes of this method are that laser is first coupled into one end of a graded index fiber, and the other end of graded index fiber
With the biggish step optical fiber phase welding of numerical aperture, while bending coiling is carried out to step optical fiber, mode is mixed, is made defeated
Laser energy is uniformly distributed out, to obtain flat-top distribution hot spot.The shortcomings that device is implementation complexity, required apparatus body
Product is big, and installation difficulty is big, is unfavorable for producing in batches.
It is even that Chinese patent document CN102012564A proposes a kind of output light spots of optical fiber coupling output semiconductor laser
Change method is that one end of mixed mold materials is fixed on lock pin, then optical fiber and mixed mold materials is intertwined, observed simultaneously
Hot spot, make its without the dark heart, without the ring of light and flashlight phenomenon, finally both fixed relative position, installation upper binding head are simultaneously put on
Protection sleeve pipe.This method increases mixed mold materials in fiber optic protection casing and increases casing diameter, the hardness of laser tail optical fiber
It can greatly increase, when use is not pliable, therefore reduces the flexibility of laser placement position.
Summary of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of device of fiber coupling output laser light spot homogenizing.Using
The present invention can effectively improve hot spot band, speckle phenomena, homogenize to hot spot.
The present invention also provides a kind of preparation methods of above-mentioned apparatus.
Technical scheme is as follows：
A kind of fiber coupling output semiconductor laser light spot homogenizing device, including the optical fiber axially across flexible pipe,
The protection pipe with optical fiber coaxial installation is provided with outside the flexible pipe.
Preferred according to the present invention, the fibre diameter is 100-1000 μm.
Preferred according to the present invention, in the flexible pipe, the optical fiber is pacified by two fixing ends perpendicular to optical fiber direction
In flexible pipe.
Preferred according to the present invention, the fixing end is glue or metal clasp, and the glue is epoxy resin.
Preferred according to the present invention, the flexible pipe is heat-shrink tube or the pvc pipe with heat shrinkable characteristic.
Preferred according to the present invention, the flexible pipe is closed cylinder.
Preferred according to the present invention, the protection pipe is polyvinyl chloride (i.e. PVC) material.
Preferred according to the present invention, the protection pipe is the cylindric pipe sleeve with armor.
Preferred according to the present invention, the protection pipe diameter is greater than flexible pipe diameter.
Preferred according to the present invention, the both ends of the protection pipe respectively pass through a connector and fix the optical fiber.
A kind of preparation method of above-mentioned fiber coupling output semiconductor laser light spot homogenizing device, includes the following steps：
(1) optical fiber is penetrated in flexible pipe, respectively exposes the cylindric optical fiber of one section of long 5cm at the both ends of flexible pipe, by this
The both ends of flexible pipe and optical fiber glue or metal clasp are fixedly mounted；
(2) optical fiber for being fixed with flexible pipe is heated；
(3) optical fiber for being fixed with flexible pipe after heating is put into the about protection pipe of 4cm shorter than optical fiber；
(4) optical fiber both ends are respectively removed to the coat of long 5cm, expose bare fibre；
(5) the cylindrical bare fibre of above-mentioned exposing is penetrated in the connector of encapsulating, each exposed portion bare fibre in both ends, and
Connector and protection pipe are fixed；
(6) connector for putting on optical fiber is placed on curing oven, solidifies 10min at a temperature of 130 DEG C, makes glue curing；
(7) after solidifying, the cylindrical fiber exposed outside connector is removed, fiber end face is formed, to fiber end face
It is ground, obtains the optical flat vertical with fiber optic hub axis, homogenizer is made；
(8) in use, one end of the homogenizer is directly coupled with laser or is connect with flange with laser die group
Head docking.
Preferred according to the present invention, optical fiber, which is put into 80-100 DEG C of baking oven, in the step (2) heats 10-20min.
Preferred according to the present invention, the length of exposed portion bare fibre is 1-5mm in the step (5).
Preferred according to the present invention, the connector is common FC lock pin, FC lock pin, SMA lock pin or ST lock pin.
Beneficial effects of the present invention：
1, fiber coupling output laser light spot homogenizing device of the invention is by heating flexible pipe so that flexible pipe by
It is heat-shrinked, is equivalent to and applies stress to the optical fiber covered in flexible pipe, thus cause optical fiber that uniform, continuous deformation occurs, it should
Deformation can change the distribution of inside of optical fibre laser energy in the various modes, make light each mode of multimode fibre distribution more
Uniformly, to keep the hot spot of output beam more uniform, improve band, speckle phenomena.
2, the range for applying stress can be in whole length of optical fiber, be also possible on partial-length, from the appearance
Do not go out any change, therefore more convenient, practical.
Detailed description of the invention
Fig. 1 is the optical fiber for fixing flexible pipe；
Fig. 2 is distribution figure of the optical fiber in flexible pipe after heating；
Fig. 3 is the diagram that the optical fiber after heating is installed to connector；
Fig. 4 is the effect picture that homogenizes hot spot of the optical fiber described in embodiment to light beam；
Fig. 5 is the effect picture for homogenizing hot spot that comparative example states optical fiber to light beam；
In figure：1, optical fiber；2, flexible pipe；3, fixing end；4, protection pipe；5, connector.
Specific embodiment
The present invention is described in detail below in conjunction with drawings and examples, but not limited to this.
Embodiment 1,
As shown in Figure 1-3, a kind of fiber coupling output semiconductor laser light spot homogenizing device, including axially across flexibility
The optical fiber 1 of pipe 2 is provided with the protection pipe 4 of installation coaxial with the optical fiber 1 outside the flexible pipe 2.
The diameter of the optical fiber 1 is 125 μm.
In the flexible pipe 2, the optical fiber 1 is mounted in flexible pipe 2 by two fixing ends 3 perpendicular to 1 direction of optical fiber.
The fixing end 3 is glue.
The glue is epoxy resin.
The flexible pipe 2 is heat-shrink tube.
The flexible pipe 2 is closed cylinder.
The protection pipe 4 is polyvinyl chloride (i.e. PVC) material.
The protection pipe 4 is the cylindric pipe sleeve with armor.
4 diameter of protection pipe is greater than 2 diameter of flexible pipe.
The both ends of the protection pipe 4 respectively pass through a connector 5, and the optical fiber 1 is fixed.
Embodiment 2,
A kind of fiber coupling output semiconductor laser light spot homogenizing device as described in Example 1, distinguishes and is, institute
The diameter for stating optical fiber 1 is 220 μm.
The fixing end 3 is snap ring.
The flexible pipe 2 is the pvc pipe with heat shrinkable characteristic.
Embodiment 3,
A kind of fiber coupling output semiconductor laser light spot homogenizing device as described in Example 1, distinguishes and is, institute
The diameter for stating optical fiber 1 is 308 μm.
The flexible pipe 2 is the pvc pipe with heat shrinkable characteristic.
Embodiment 4,
A kind of fiber coupling output semiconductor laser light spot homogenizing device as described in Example 1, distinguishes and is, institute
The diameter for stating optical fiber 1 is 440 μm.
The fixing end 3 is snap ring.
Embodiment 5,
A kind of preparation method of the fiber coupling output semiconductor laser light spot homogenizing device as described in embodiment 1-4, packet
Include following steps：
(1) optical fiber 1 is penetrated in flexible pipe 2, respectively exposes the cylindric optical fiber 1 of one section of long 5cm at the both ends of flexible pipe 2,
The both ends of the flexible pipe 2 and the glue of optical fiber 1 or metal clasp are fixedly mounted；
(2) optical fiber for being fixed with flexible pipe 2 is heated；
(3) optical fiber 1 for being fixed with flexible pipe 2 after heating is put into the protection pipe 4 of about 4cm shorter than optical fiber 1；
(4) 1 both ends of optical fiber are respectively removed to the coat of long 5cm, expose bare fibre；
(5) the cylindrical bare fibre of above-mentioned exposing is penetrated in the connector 5 of encapsulating, each exposed portion bare fibre in both ends,
And it is connector 5 and protection pipe 4 is fixed；
(6) connector 5 for putting on optical fiber 1 is placed on curing oven, solidifies 10min at a temperature of 130 DEG C, makes glue curing；
(7) after solidifying, the cylindrical fiber exposed outside connector 5 is removed, fiber end face is formed, to fiber end face
It is ground, obtains the optical flat vertical with fiber optic hub axis, homogenizer is made；
(8) in use, one end of the homogenizer is directly coupled with laser or is connect with flange with laser die group
First 5 docking.
Preferred according to the present invention, optical fiber 1, which is put into 80-100 DEG C of baking oven, in the step (2) heats 10-20min.
Preferred according to the present invention, the length of exposed portion bare fibre is 1-5mm in the step (5).
Preferred according to the present invention, the connector 5 is common FC lock pin, FC lock pin, SMA lock pin or ST lock pin.
Comparative example,
Optical patchcord used in the comparative example is circle in diameter, length and the material and embodiment 1 of cylindric optical fiber
Column optical fiber is identical, and the light beam parameters of used laser light source are also identical with embodiment 1.
Spot pattern is recorded using CCD, the hot spot work that homogenizes of optical fiber described in embodiment 1 and existing cylindric optical fiber is used as
Comparative test：Fig. 4 is the effect picture that homogenizes hot spot of the optical fiber described in embodiment 1 to light beam, and spot center speckle obviously subtracts in Fig. 4
Few, hot spot becomes uniform；And Fig. 5 is the effect picture for homogenizing hot spot that comparative example states optical fiber to light beam, hot spot exists apparent in Fig. 5
Band and speckle.
In conclusion using device prepared by the present invention compared with ordinary optic fibre transmitting beam, hence it is evident that passed than ordinary optic fibre
Defeated beam and focus is uniform, and band and speckle phenomena significantly reduce.
Claims (8)
1. a kind of preparation method of fiber coupling output semiconductor laser light spot homogenizing device, includes the following steps：
(1) optical fiber is penetrated in flexible pipe, respectively exposes the cylindric optical fiber of one section of long 5cm at the both ends of flexible pipe, by the flexibility
The both ends of pipe and optical fiber glue or metal clasp are fixedly mounted；
(2) being heated to shrinking by the flexible pipe for being fixed with optical fiber makes optical fiber generate uniform, continuous deformation；
(3) optical fiber for being fixed with flexible pipe after heating is put into the about protection pipe of 4cm shorter than optical fiber；
(4) optical fiber both ends are respectively removed to the coat of long 5cm, expose bare fibre；
(5) the cylindrical bare fibre of above-mentioned exposing is penetrated in the connector of encapsulating, each exposed portion bare fibre in both ends, and will be even
Connector and protection pipe are fixed；
(6) connector for putting on optical fiber is placed on curing oven, solidifies 10min at a temperature of 130 DEG C, makes glue curing；
(7) after solidifying, the cylindrical fiber exposed outside connector is removed, forms fiber end face, fiber end face is carried out
Grinding, obtains the optical flat vertical with fiber optic hub axis, homogenizer is made；
(8) in use, one end of the homogenizer is directly coupled with laser or with flange and laser die group connector pair
It connects.
2. the preparation method of fiber coupling output semiconductor laser light spot homogenizing device according to claim 1, special
Sign is that optical fiber, which is put into 80-100 DEG C of baking oven, in the step (2) heats 10-20min；Exposed division in the step (5)
The length for dividing bare fibre is 1-5mm.
3. a kind of fiber coupling output semiconductor laser light spot homogenizing device, which is characterized in that the device includes having to be heated
The flexible pipe of shrinkage character, optical fiber passes through flexible pipe and the both ends of flexible pipe is fixed on optical fiber, outside the flexible pipe
It is provided with the protection pipe with optical fiber coaxial installation, the flexible pipe heat shrinkable can make optical fiber that uniform, continuous shape occur
Become.
4. a kind of fiber coupling output semiconductor laser light spot homogenizing device according to claim 3, which is characterized in that
The fibre diameter is 100-1000 μm.
5. a kind of fiber coupling output semiconductor laser light spot homogenizing device according to claim 3, which is characterized in that
In the flexible pipe, the optical fiber is mounted in flexible pipe by two fixing ends perpendicular to optical fiber direction, and the fixing end is
Epoxy glue or metal clasp.
6. a kind of fiber coupling output semiconductor laser light spot homogenizing device according to claim 3, which is characterized in that
The flexible pipe is heat-shrink tube or the pvc pipe with heat shrinkable characteristic；The flexible pipe is closed cylinder.
7. a kind of fiber coupling output semiconductor laser light spot homogenizing device according to claim 3, which is characterized in that
The protection pipe is pvc material；The protection pipe is the cylindric pipe sleeve with armor；The protection pipe diameter is greater than soft
Property pipe diameter.
8. a kind of fiber coupling output semiconductor laser light spot homogenizing device according to claim 3, which is characterized in that
The both ends of the protection pipe respectively pass through a connector and fix the optical fiber.
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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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| 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 |
| 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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| FR2922326B1 (en) * | 2007-10-12 | 2009-11-13 | Ecole Polytech | FIBER OPTIC HOMOGENEZER |
| CN102081235A (en) * | 2010-12-08 | 2011-06-01 | 福州高意通讯有限公司 | Method of homogenization, depolarization and decoherence of optical signal transmitted in multimode fiber |
| CN202929294U (en) * | 2012-09-27 | 2013-05-08 | 哈尔滨工程大学 | Emergent light spot strength homogenizing mode-disturbing device for optical fiber |
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