CN1309124C - Cooling device for output end of high-power double-clad fiber laser - Google Patents
Cooling device for output end of high-power double-clad fiber laser Download PDFInfo
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- CN1309124C CN1309124C CNB2004100893370A CN200410089337A CN1309124C CN 1309124 C CN1309124 C CN 1309124C CN B2004100893370 A CNB2004100893370 A CN B2004100893370A CN 200410089337 A CN200410089337 A CN 200410089337A CN 1309124 C CN1309124 C CN 1309124C
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- Prior art keywords
- optical fiber
- metal sleeve
- semimetal
- sleeve pipe
- pipe
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- 238000001816 cooling Methods 0.000 title claims abstract description 20
- 239000000835 fiber Substances 0.000 title abstract description 18
- 239000013307 optical fiber Substances 0.000 claims abstract description 61
- 229910052751 metal Inorganic materials 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 239000002826 coolant Substances 0.000 claims abstract description 9
- 239000012809 cooling fluid Substances 0.000 claims description 12
- 239000000498 cooling water Substances 0.000 claims description 8
- 238000005057 refrigeration Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 238000002207 thermal evaporation Methods 0.000 abstract 1
- 238000005253 cladding Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
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Abstract
The utility model provides a high power double-clad fiber laser output end cooling device, includes a metal sleeve, and this metal sleeve is merged by the first half metal sleeve and the second half metal sleeve that have the coolant liquid chamber that the structure is the same and is formed, is equipped with the optical fiber groove that supplies the head of double-clad optic fibre to closely nest on the surface of merging of first half metal sleeve and second half metal sleeve, first half metal sleeve be equipped with the coolant liquid and advance the pipe, second half metal sleeve has the coolant liquid exit tube, first half metal sleeve and second half metal sleeve between have the coolant liquid passageway, the coolant liquid advance the pipe and the coolant liquid exit tube link to each other with a coolant liquid source. The invention is suitable for refrigerating the output ends of a high-power double-clad fiber laser and a double-clad fiber amplifier, can prevent the permanent damage of thermal deposition to the output end face of the fiber, improves the output performance of the fiber laser and the amplifier and prolongs the service life. The invention has the characteristics of simple and compact structure, practicality and good refrigeration effect.
Description
Technical field
The present invention relates to double-clad optical fiber laser and image intensifer, the cooling device of particularly a kind of high-power double cladding optical fiber laser or amplifier out is hereinafter to be referred as the cooling device of high power double clad optical fiber laser output end.
Background technology
Along with last century Mo optical fiber technology develop rapidly and the further maturation of high power semiconductor lasers manufacturing process, double-clad optical fiber laser has obtained significant progress.Compare with original single covering Active Optical Fiber; doubly clad optical fiber is to have increased a pure quartz waveguide that diameter is 400 μ m around the doped core of diameter less than 9 μ m; the outside is the quartzy low polymer-coated layer of refractive index; the outside is a protective layer the most again, and doubly clad optical fiber just has bigger pumping area and bigger numerical aperture like this.High-power multiple die semiconductor laser can be coupled into the inner cladding waveguide from the end face of optical fiber, in transmission course, constantly passes through the fibre core of doping and dopant ion in the pumping fibre core makes doubly clad optical fiber obtain gain.Power output rises to hundreds of watts of magnitudes of present double-clad optical fiber laser (referring to Zhou Jun from the hundreds of milliwatt magnitude of original single cladded fiber laser, " the A 115-W Ytterbium-Doped fiber laser " that people such as Lou Qihong deliver, Chinese Physics Letter, Vol.21 (6), 2004,1083～1085), the power output of fiber amplifier also reaches the hectowatt magnitude.Yet so big power is from the fibre core output of several microns at an end of doubly clad optical fiber, and power density is very big, easily end face is caused permanent damage, has limited the practical application of fiber laser and amplifier.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of refrigerating plant that is used for high-power double cladding optical fiber laser or amplifier out is provided, in case the not-go-end face is subjected to permanent damage, improve fiber laser and amplifier output performance, increase the service life.
The principle of the technology of the present invention solution is: because double-clad optical fiber laser or amplifier are when high power turns round, the high power laser light of hectowatt magnitude is from the fibre core output of diameter less than 9 μ m, power density is very big, the heat that produces at output has little time to distribute, cause heat localization, the local temperature of end is risen, burn the surrounding layer of end, cause permanent damage to end face.Under the pulsed operation state, high peak power density can cause the heat damage of end quartz medium.Therefore, need only the refrigerating plant that adds a boiler water circulation at output, the heat that produces when in time high power being turned round is taken away, and makes the end face temperature can not be elevated to the degree that can cause damage to optical fiber, and the output of optical fiber just can not damage.
Technical solution of the present invention is as follows:
A kind of high power double clad optical fiber laser output end cooling device, be characterized in that it comprises a metal sleeve, this metal sleeve is formed by identical the having the first semimetal sleeve pipe and the second semimetal sleeve pipe that cools off sap cavity and close of structure, the first semimetal sleeve pipe and the second semimetal sleeve pipe and close the surface and be provided with for the tight nested optical fiber duct of the head of doubly clad optical fiber, the described first semimetal sleeve pipe is provided with the cooling fluid inlet pipe, the second semimetal sleeve pipe has cooling fluid to go out pipe, between the described first semimetal sleeve pipe and the second semimetal sleeve pipe cooling passage is arranged, described cooling fluid inlet pipe goes out the Guan Yuyi liquid coolant sources with cooling fluid and links to each other.
The cooling passage of described metal sleeve is by constituting communicating pipe between the described first semimetal sleeve pipe and the second semimetal sleeve pipe.
In the closely nested optical fiber duct of the head of described doubly clad optical fiber, this doubly clad optical fiber end face near but do not exceed the port of optical fiber duct.
Described cooling fluid is a cooling water.
The present invention transmits the heat that output produces by the metal sleeve that is enclosed within the doubly clad optical fiber output when high power turns round; cooling fluid with cold liquid pump Pu constant temperature is cooled off output; make the temperature of this end be unlikely to raise, thus the fire damage when the protection output is avoided the high power running.
Description of drawings
Fig. 1 is the structural representation of high power double clad optical fiber laser output end cooling device of the present invention.
Fig. 2 is the sectional view of metal sleeve of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing and embodiment, but should not limit protection scope of the present invention with this.
See also Fig. 1 and Fig. 2 earlier, Fig. 1 is the structural representation of the specific embodiment of high-power double cladding optical fiber laser of the present invention and amplifier out cooling device, and Fig. 2 is the sectional view of metal sleeve of the present invention, and the cooling fluid of this embodiment is a cooling water.As seen from the figure, high-power double cladding optical fiber laser of the present invention and amplifier out cooling device, comprise a metal sleeve 1, this metal sleeve 1 is by the first semimetal sleeve pipe 11 with cooling water cavity and the second semimetal sleeve pipe 12 and close and form, the first semimetal sleeve pipe 11 and the second semimetal sleeve pipe 12 and close the surface and be provided with for the tight nested optical fiber duct 13 of the head of doubly clad optical fiber 5, the described first semimetal sleeve pipe 11 is provided with water inlet pipe 2, the second semimetal sleeve pipe 12 has outlet pipe 3, between the described first semimetal sleeve pipe 11 and the second semimetal sleeve pipe 12 there is cooling water communicating pipe 4, in the closely nested optical fiber duct 13 of the head of described doubly clad optical fiber 5, this doubly clad optical fiber end face 51 near but do not exceed the port of optical fiber duct 13.Described water inlet pipe 2 links to each other with a cooling water source with outlet pipe 3 again.
The relation of described each parts is: kind of refrigeration cycle water enters metal sleeve 11 from water inlet pipe 2, enters metal sleeve 12 through communicating pipe 4, flows out through outlet pipe 3 again; Because optical fiber duct 13 and doubly clad optical fiber 5 close-fittings relation, in the time of the running of doubly clad optical fiber 5 high powers, most of heat that doubly clad optical fiber 5 outputs produce will pass to metal sleeve 1 by heat exchange pattern, and the cooling water that the heat of metal sleeve 1 is recycled is taken away fast, thereby realizes the optical fiber head is freezed.
Be a specific embodiment below:
Choose the material of the good aluminium of heat-conductive characteristic, make long 6cm, the metal sleeve 1 of diameter 5cm as metal sleeve 1.With inner cladding 400/350 μ m, external diameter is that the D type doubly clad optical fiber 5 of 600 μ m is the cooling object, mills out diameter slightly less than the optical fiber duct 13 of 600 μ m on metal sleeve 1.Doubly clad optical fiber 5 outputs that end face has been polished are put into the optical fiber duct 13 of metal sleeve 1, because doubly clad optical fiber 5 coats have certain toughness and elasticity, in the time of the first semimetal sleeve pipe 11 and 12 merging of the second semimetal sleeve pipe, can realize the tight fit of 1 of doubly clad optical fiber 5 and metal sleeve, thereby guarantee to have good heat-conductive characteristic between metal sleeve 1 and doubly clad optical fiber 5 heads.The temperature of cooling-water machine (not shown) is set in 15 degrees centigrade.Like this, when the double-clad optical fiber laser high power turns round, the heat that output produced will can not deposit in a large number, thereby avoid the fiber end face fire damage.
In sum, the present invention realizes the cooling of doubly clad optical fiber 5 heads by adding a metal sleeve 1 at the doubly clad optical fiber output, thereby heat deposition causes damage to fiber end face when effectively avoiding the high power running, improves the stability of a system, increases the service life.
Simultaneously, can influence the output performance of laser and amplifier because the gain media temperature raises, for example: when the gain media temperature raise, laser-conversion efficiency can descend.The present invention also will help improving the conversion efficiency of laser or amplifier by the cooling to the doubly clad optical fiber head.
Claims (4)
1, a kind of high power double clad optical fiber laser output end cooling device, it is characterized in that it comprises a metal sleeve (1), this metal sleeve (1) is formed by identical the having the first semimetal sleeve pipe (11) and the second semimetal sleeve pipe (12) that cools off sap cavity and close of structure, the first semimetal sleeve pipe (11) and the second semimetal sleeve pipe (12) and close the surface and be provided with for the tight nested optical fiber duct (13) of the head of doubly clad optical fiber (5), the described first semimetal sleeve pipe (11) is provided with cooling fluid inlet pipe (2), the second semimetal sleeve pipe (12) has cooling fluid to go out pipe (3), between the described first semimetal sleeve pipe (11) and the second semimetal sleeve pipe (12) cooling passage (4) is arranged, described cooling fluid inlet pipe (2) goes out pipe (3) with cooling fluid and links to each other with a liquid coolant sources.
2, high power double clad optical fiber laser output end cooling device according to claim 1 is characterized in that the cooling passage (4) of described metal sleeve (1) was made of communicating pipe between the described first semimetal sleeve pipe (11) and the second semimetal sleeve pipe (12).
3, high power double clad optical fiber laser output end cooling device according to claim 1, it is characterized in that in the closely nested optical fiber duct (13) of the head of described doubly clad optical fiber 5, this doubly clad optical fiber end face (51) near but do not exceed the port of optical fiber duct (13).
4, high power double clad optical fiber laser output end cooling device according to claim 1 is characterized in that described cooling fluid is a cooling water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100893370A CN1309124C (en) | 2004-12-09 | 2004-12-09 | Cooling device for output end of high-power double-clad fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100893370A CN1309124C (en) | 2004-12-09 | 2004-12-09 | Cooling device for output end of high-power double-clad fiber laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1617039A CN1617039A (en) | 2005-05-18 |
| CN1309124C true CN1309124C (en) | 2007-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100893370A Expired - Fee Related CN1309124C (en) | 2004-12-09 | 2004-12-09 | Cooling device for output end of high-power double-clad fiber laser |
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| Country | Link |
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| CN (1) | CN1309124C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453192A (en) * | 2017-08-09 | 2017-12-08 | 西南技术物理研究所 | A kind of high-capacity optical fiber laser liquid cooling heat radiation system |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7909817B2 (en) | 2005-06-08 | 2011-03-22 | Innovaquartz, Inc. (AMS Research Corporation) | Lateral laser fiber for high average power and peak pulse energy |
| CN100371749C (en) * | 2006-04-29 | 2008-02-27 | 北京交通大学 | Method for improving laser fiber end-face input power damage threshold |
| US8858542B2 (en) | 2007-08-03 | 2014-10-14 | Ams Research Corporation | Side-firing fiber delivery device with active cooling cap |
| CN100588052C (en) * | 2008-01-22 | 2010-02-03 | 中国人民解放军国防科学技术大学 | Refrigeration method of high-power optical fiber laser |
| CN103246025B (en) * | 2013-05-23 | 2016-03-16 | 纽敦光电科技（上海）有限公司 | A kind of optical fiber clamping structure being applied to high-power laser optical fiber coupling |
| CN104466629B (en) * | 2015-01-04 | 2017-09-19 | 中国工程物理研究院总体工程研究所 | A kind of high power fiber laser optical fiber output flexible double-tube water cooling plant |
| CN107037538A (en) * | 2017-05-23 | 2017-08-11 | 广东工业大学 | A kind of fibre cladding power stripper and its manufacture method |
| CN109567932B (en) * | 2018-12-07 | 2020-05-19 | 中聚科技股份有限公司 | Laser treatment system using thulium-doped optical fiber |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61124904A (en) * | 1984-11-22 | 1986-06-12 | Matsushita Electric Ind Co Ltd | Optical waveguide device for light power transmission |
| CN2343598Y (en) * | 1998-10-09 | 1999-10-13 | 武汉楚天激光（集团）股份有限公司 | High-power water-cooled optical fibre apparatus |
| US6167177A (en) * | 1996-07-05 | 2000-12-26 | Permanova Lasersystem | Optical fiber cable |
| CN1523384A (en) * | 2003-02-19 | 2004-08-25 | 中国科学院半导体研究所 | Optical fiber head arrangement for large power laser coupling and cooling method for optical fiber head |
| CN2749147Y (en) * | 2004-12-09 | 2005-12-28 | 中国科学院上海光学精密机械研究所 | Cooling device for output end of high-power double-clad fiber laser |
-
2004
- 2004-12-09 CN CNB2004100893370A patent/CN1309124C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61124904A (en) * | 1984-11-22 | 1986-06-12 | Matsushita Electric Ind Co Ltd | Optical waveguide device for light power transmission |
| US6167177A (en) * | 1996-07-05 | 2000-12-26 | Permanova Lasersystem | Optical fiber cable |
| CN2343598Y (en) * | 1998-10-09 | 1999-10-13 | 武汉楚天激光（集团）股份有限公司 | High-power water-cooled optical fibre apparatus |
| CN1523384A (en) * | 2003-02-19 | 2004-08-25 | 中国科学院半导体研究所 | Optical fiber head arrangement for large power laser coupling and cooling method for optical fiber head |
| CN2749147Y (en) * | 2004-12-09 | 2005-12-28 | 中国科学院上海光学精密机械研究所 | Cooling device for output end of high-power double-clad fiber laser |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453192A (en) * | 2017-08-09 | 2017-12-08 | 西南技术物理研究所 | A kind of high-capacity optical fiber laser liquid cooling heat radiation system |
| CN107453192B (en) * | 2017-08-09 | 2019-09-27 | 西南技术物理研究所 | A kind of high-capacity optical fiber laser liquid cooling heat radiation system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1617039A (en) | 2005-05-18 |
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Granted publication date: 20070404 Termination date: 20131209 |