CN100576661C - The optical fiber cooling apparatus that is used for high-power double cladding optical fiber laser and amplifier - Google Patents
The optical fiber cooling apparatus that is used for high-power double cladding optical fiber laser and amplifier Download PDFInfo
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- CN100576661C CN100576661C CN200810048535A CN200810048535A CN100576661C CN 100576661 C CN100576661 C CN 100576661C CN 200810048535 A CN200810048535 A CN 200810048535A CN 200810048535 A CN200810048535 A CN 200810048535A CN 100576661 C CN100576661 C CN 100576661C
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Abstract
The invention provides a kind of optical fiber cooling apparatus that is used for high-power double cladding optical fiber laser and amplifier, comprise metal tube, input metal fiber clamp and output end metal fiber clamp; Metal pipe internal surface is provided with and is the optical fiber duct that shape of threads distributes, and metal tube lower sides symmetry has cooling air intake; Input and output side metal fiber clamp is close to the metal tube side-walls respectively, and two anchor clamps are the bullion piece, and the metal derby surface is provided with optical fiber duct, and it is connected with the optical fiber duct of metal pipe internal surface; Metal derby is provided with the hold-down mechanism that is used for optical fiber is pressed in optical fiber duct, and the metal derby inside of input metal fiber clamp also is provided with cooling passage.The present invention contacts with the tight of metal fiber clamp and metal tube by optical fiber, the heat transferred that produces is gone out, come cool metal pipe and fiber clamp with the Cryogenic air and the cooling fluid that flow, thereby avoid the polymer surrounding layer temperature of doubly clad optical fiber to raise, prevent that optical fiber is aging, increases the service life.
Description
Technical field
The present invention relates to double-clad optical fiber laser and amplifier technical field, be specifically related to cooling device doubly clad optical fiber in high-capacity optical fiber laser and the amplifier.
Background technology
The double-clad optical fiber laser of semiconductor laser diode pump shop has the characteristics of high efficiency, high power and good beam quality, has huge using value aspect machining, communication and the national defence.The continuous power output of double-clad optical fiber laser has obtained significant progress in recent years, brought up to kilowatt magnitude (referring to Y.Jeong by initial milliwatt magnitude, J.K.Sahu, D.N.Payne.Ytterbium-doped large-core fiber laser with 1.36kW continuous-wave outputpower.Optics Express, 2004,12 (25): 6088-6092), fiber amplifier has also reached multikilowatt simultaneously.The reason why high-power double cladding optical fiber laser can develop rapidly is to have benefited from doubly clad optical fiber preparation technology's maturation.This optical fiber structurally is different from traditional fiber, and its fibre core doping with rare-earth ions is surrounded by pure quartzy inner cladding on every side, and the outside is coated with the polymer of last layer low-refraction as surrounding layer, wraps protective layer more outside.Laser and pump light mainly transmit in fibre core and inner cladding, and the polymer surrounding layer provides constraints to pump light.When doubly clad optical fiber was used to produce high power laser light, because the restriction of the quantum efficiency of optical fiber dopant ion own, the part pump power was not converted to laser power output, and directly is converted to heat energy.This heat accumulates directly impact polymer surrounding layer performance degradation of back in optical fiber, aging even inefficacy, and this all will cause laser to produce decrease in efficiency, and power reduces, and is therefore most important in high-capacity optical fiber laser to the cooling of doubly clad optical fiber.
On to the cooling scheme of high-capacity optical fiber laser doubly clad optical fiber input and output side, have patent report (is the Chinese patent literature of ZL200410098337.0 referring to the patent No.) at present, but this device is mainly in order to prevent the permanent damage of fiber end face, and cooling effect is confined in the shorter scope in optical fiber two ends, all the other optical fiber shorten laser life-span if not obtaining cooling processing will make the accelerated ageing of optical fiber jacket polymer, inefficacy.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, the cooling device of a kind of high-power double cladding optical fiber laser and amplifier gain optical fiber is provided, to prevent whole section double clad gain fibre surrounding layer polymer sex change, aging, improve the high-capacity optical fiber laser output performance, prolong laser life-span.
Technical scheme of the present invention is:
The optical fiber cooling apparatus that is used for high-power double cladding optical fiber laser and amplifier comprises metal tube, input metal fiber clamp and output end metal fiber clamp; Metal pipe internal surface is provided with and is the optical fiber duct that shape of threads distributes, and metal tube lower sides symmetry has two cooling air intakes; Input and output side metal fiber clamp is close to the metal tube side-walls respectively, and two anchor clamps are the bullion piece, and the metal derby surface is provided with optical fiber duct, and it is connected with the optical fiber duct of metal pipe internal surface; Metal derby is provided with the hold-down mechanism that is used for optical fiber is pressed in optical fiber duct, and the metal derby inside of input metal fiber clamp also is provided with cooling passage.
As improvement of the present invention, described hold-down mechanism is made of magnet that is positioned over described metal derby inside and the ferromagnetism cover plate that is positioned at optical fiber duct place, metal derby surface.
The present invention contacts with the tight of metal fiber clamp and metal tube by doubly clad optical fiber, the heat transferred that optical fiber produced when high power was turned round is gone out, come cool metal pipe and fiber clamp with the Cryogenic air and the cooling fluid that flow, thereby the polymer surrounding layer temperature that makes doubly clad optical fiber is unlikely to raise, prevent that optical fiber is aging, increases the service life.
Embodiment
To further instruction of the present invention, but should not limit protection scope of the present invention below in conjunction with accompanying drawing and specific embodiment with this.
The thinking of technical solution of the present invention is: because high-power double cladding optical fiber laser and amplifier are in the running; several hectowatts even last kilowatt laser and pump light transmit in fibre core and inner cladding; if optical fiber is not carried out any cooling processing; the heat that produces in the optical fiber can not in time leave and cause thermal accumlation; polymer surrounding layer and protective layer temperature are raise; cause the polymer sex change, accelerated ageing, even catching fire.Therefore doubly clad optical fiber is close to the heat that is coiled in generation in the time of just can in time high power being turned round on the cooling device and is taken away, polymer temperature is controlled in the scope quilt of operate as normal.
Fig. 1 is the structural representation of the embodiment of the invention, comprises input metal fiber clamp 1, and metal tube 2 and output end metal fiber clamp 3, metal tube 2 sidewalls are close to input metal fiber clamp 1 and output end metal fiber clamp 3 respectively and are joined.
Fig. 2 is the end view of input and output side fiber clamp, and input metal fiber clamp 1 is combined by bullion piece 11 with cooling passage and the ferromagnetism cover plate 12 with same size.Have the optical fiber duct 13 that can closely embed doubly clad optical fiber on bullion piece 11 and ferromagnetism cover plate 12 contacted surfaces, described doubly clad optical fiber 4 is put into optical fiber duct, the magnetic force pressed fiber that relies on strong magnets embedded in the bullion piece and ferromagnetism cover plate 12 to be produced.One end face of metal derby is a cambered surface, with metal tube outer surface radian coupling so that can with the metal tube close proximity.In the metal derby cooling passage and cooling fluid inlet pipe 14 with go out to manage 15 and be connected.Described fiber clamp 1 can be fixed on to be regulated on the platform.
The doubly clad optical fibers 4 of coiling are in the optical fiber duct that enters output end metal fiber clamp 3 after circular hole passes 13 in the metal tube 2, and the structure of described output end metal fiber clamp 3 is similar to input metal fiber clamp 1, and doubly clad optical fiber 4 is compressed by magnetic cover plate 12.Because optical power distribution reduces with the fiber lengths increase in the fiber laser doubly clad optical fiber, therefore can not need logical cooling fluid at output.
Doubly clad optical fiber 4 is close-fitting relations with the optical fiber duct 13 of input end fiber anchor clamps 1 and output fiber clamp 3, and be close in the optical fiber duct 21 of metal tube 2, when the laser high power turns round, most of heat that doubly clad optical fiber 4 produces has passed to input end fiber anchor clamps 1, metal tube 2 and output fiber clamp 3 by heat conducting mode, and be cooled respectively liquid and convection current air of their heat taken away, thereby realizes the cooling to doubly clad optical fiber surrounding layer polymer.
Be a specific embodiment below:
Select for use the good copper of thermal conductivity as input and output side fiber clamp bullion piece 11 materials, the long 20cm of copper billet, wide 1.5cm, thick 1cm.With inner cladding diameter 650/600um, external diameter is that the doubly clad optical fiber 4 of 1.2mm is the cooling object, mills out the V-type optical fiber duct 13 that a diameter is slightly less than 1.2mm at copper billet one side surface.Magnetic cover plate 2 selects for use iron as material, and length is consistent with copper billet with width, and thickness is 3mm, mills out the V-type optical fiber duct 13 of a same size on cover plate one surface.The doubly clad optical fiber input that polishes end face is put into the optical fiber duct of copper billet, when cover plate and copper billet merge, rely on magnetic force to make between doubly clad optical fiber and the fiber clamp and closely contact, thus the good heat radiating of assurance input end fiber covering polymer.
Select for use the good stainless steel tube of thermal conductivity as metal tube 2, the stainless steel tube height is 25cm, diameter 21cm, thickness of pipe wall 3mm.Inner surface at metal tube 2 mills out the screw thread 21 that diameter is slightly less than 1.2mm, and the about 8mm of adjacent thread spacing bores the aperture 22 of two diameter 5mm in the metal tube side, respectively with the highest and minimum two optical fiber ducts corresponding.Symmetry has two long 5cm, the bar hole 23 of high 1cm near the bottom of metal tube.Use the thin round plate 24 and metal tube 2 bottoms welding of a diameter as 23cm.Doubly clad optical fiber is drawn from input end fiber anchor clamps afterbody, passes metal tube top aperture, is close to the downward coiled fiber of pipe inner fiber groove shape of threads, and last doubly clad optical fiber passes from the bottom aperture.When high power laser light transmits in optical fiber, the heat of optical fiber will be delivered to rapidly on the metal tube, and a fan 25 is installed at the metal tube top, and cool exterior air enters in the pipe from metal tube bottom bar hole, discharge from the top after taking away optical fiber and inside pipe wall heat.
The output doubly clad optical fiber closely contacts with output fiber clamp 3 equally, guarantees good heat radiating.Because the output optical fiber power will be significantly less than input, therefore do not need to use water-cooled at output.
In sum, the present invention is the heat that optical fiber is produced when taking away the high power running by the metal engaging arm of being close to doubly clad optical fiber and metal tube, thereby the polymer surrounding layer temperature that makes doubly clad optical fiber is unlikely to raise, and prevents that optical fiber is aging, increases the service life.Simultaneously, reduce because the rising of doubly clad optical fiber temperature can cause laser to produce efficient, so the present invention also will help improving the conversion efficiency of double-clad optical fiber laser.
Claims (3)
1, the optical fiber cooling apparatus that is used for high-power double cladding optical fiber laser and amplifier comprises metal tube, input metal fiber clamp and output end metal fiber clamp;
Metal pipe internal surface is provided with and is the optical fiber duct that shape of threads distributes, and metal tube lower sides symmetry has two cooling air intakes;
Input and output side metal fiber clamp is close to the metal tube side-walls respectively, and two anchor clamps are the bullion piece, and the metal derby surface is provided with optical fiber duct, and it is connected with the optical fiber duct of metal pipe internal surface; Metal derby is provided with the hold-down mechanism that is used for optical fiber is pressed in metal derby surface optical fiber duct, and the metal derby inside of input metal fiber clamp also is provided with cooling passage.
2, the optical fiber cooling apparatus that is used for high-power double cladding optical fiber laser and amplifier according to claim 1, it is characterized in that described hold-down mechanism is made of magnet that is positioned over described metal derby inside and the ferromagnetism cover plate that is positioned at optical fiber duct place, metal derby surface.
3, the optical fiber cooling apparatus that is used for high-power double cladding optical fiber laser and amplifier according to claim 1 and 2 is characterized in that, described metal tube inner top is equipped with radiator fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810048535A CN100576661C (en) | 2008-07-25 | 2008-07-25 | The optical fiber cooling apparatus that is used for high-power double cladding optical fiber laser and amplifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810048535A CN100576661C (en) | 2008-07-25 | 2008-07-25 | The optical fiber cooling apparatus that is used for high-power double cladding optical fiber laser and amplifier |
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| CN101335422A CN101335422A (en) | 2008-12-31 |
| CN100576661C true CN100576661C (en) | 2009-12-30 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867143B (en) * | 2010-06-22 | 2011-07-20 | 中国人民解放军国防科学技术大学 | Integral cooling device for high-power optical fiber laser or amplifier |
| CN102751649B (en) * | 2012-06-29 | 2014-05-14 | 西北大学 | 469nm full-fiber-structure high-power blue light fiber laser device |
| JP6126562B2 (en) * | 2014-08-27 | 2017-05-10 | 三星ダイヤモンド工業株式会社 | Fiber optic equipment |
| CN105731188A (en) * | 2016-03-24 | 2016-07-06 | 江苏天元激光科技有限公司 | Winding device for active optical fiber and fiber winding method |
| CN105826797A (en) * | 2016-05-16 | 2016-08-03 | 南京先进激光技术研究院 | Optical fiber heat radiator and laser |
| CN106769324A (en) * | 2017-01-13 | 2017-05-31 | 正新橡胶（中国）有限公司 | A kind of detection method of tire supporting material nonwoven fabric from filaments |
| CN106684680A (en) * | 2017-02-28 | 2017-05-17 | 武汉大学 | Mixed heat dissipation apparatus used for high-power optical fiber amplifier |
| CN107994447A (en) * | 2018-01-10 | 2018-05-04 | 西北核技术研究所 | Fiber end face couples protective device |
| CN109273970B (en) * | 2018-11-16 | 2019-11-29 | 中聚科技股份有限公司 | A kind of laser gain optical fiber cooling apparatus |
| CN112134127B (en) * | 2020-09-28 | 2022-02-15 | 武汉安扬激光技术股份有限公司 | Air-cooled cladding pump high-power optical fiber amplifier |
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