CN106785823A - A kind of disturbed flow type microchannel heat sink for high-capacity optical fiber laser - Google Patents
A kind of disturbed flow type microchannel heat sink for high-capacity optical fiber laser Download PDFInfo
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- CN106785823A CN106785823A CN201710184754.0A CN201710184754A CN106785823A CN 106785823 A CN106785823 A CN 106785823A CN 201710184754 A CN201710184754 A CN 201710184754A CN 106785823 A CN106785823 A CN 106785823A
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- Prior art keywords
- flow
- microchannel
- optical fiber
- cooling medium
- disturbing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/042—Arrangements for thermal management for solid state lasers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0407—Liquid cooling, e.g. by water
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
Disturbed flow type microchannel heat sink the present invention relates to be used for high-capacity optical fiber laser, it is made up of substrate and capping, there are two groups of parallel microchannels in the substrate, respectively there is an intake channel for cooling medium in the both sides of microchannel, there is an exit passageway for cooling medium in the middle of two groups of parallel microchannels, the head position of exit passageway has a flow-disturbing cylindrical passageway, on the other hand the flow-disturbing cylindrical passageway carries out local dip on the one hand as an intake channel for cooling medium to the cooling medium in exit passageway；There is conduit in the capping, for placing optical fiber.After fluid inside radiator is through flow-disturbing cylindricality path partially flow-disturbing, the volume flow of microchannel localized high temperature regions is increased so that fluid at the uniform velocity passes in and out microchannel, reduce the temperature of high-temperature area.The present invention is conducive to the temperature difference of high-power fiber amplifier each point balanced, belongs to the passive type type of cooling, and noise is small, the advantages of cool down rapid, with reliability and operability higher.
Description
Technical field
The invention belongs to photoelectric device technical field, it is related to be radiated for the disturbed flow type microchannel of high-capacity optical fiber laser
Device, is conducive to significantly improving the use power and long-term use reliability of fiber amplifier.
Background technology
Good beam quality, hot spot are small, high reliability makes optical fiber laser in communication, industry, military, medical treatment, electricity
Have broad application prospects depending on numerous industries such as displays.Due toIon energy level simple structure, in the absence of Excited-state Absorption and dense
Degree quenching effect, with quantum efficiency very high and light light conversion efficiency.Since the eighties in last century, people willIon
Mix in quartz or fluoride fiber, substantial amounts of research has been carried out as a kind of gain media of laser.Doubly clad optical fiber pump
Pu technology and high power, the invention of high brightness LD pump modules cause that the power output of optical fiber laser is lifted rapidly, kilowatt
The YDCF lasers of level power have tended to ripe.IPG companies utilize all -fiber main oscillations-power amplification within 2009（MOPA,
main oscillator power amplifier）Structure realizes singleOptical fiber single mode continuous power output 9.6KW.
For high-capacity optical fiber laser, the heat waste of nonlinear effect, the destruction of core material and optical fiber coating
Wound is all to limit the key factor that power is continued to lift up.The low refractive index polymer coat of traditional doubly clad optical fiber surrounding layer
It is very sensitive to temperature, fire damage can be caused when temperature reaches 150 ~ 200 DEG C, typically require optical fiber during long-time safe operation
The temperature of outer surface is less than 80 DEG C.Although it is most of hot that there is optical fiber larger surface area-volume ratio can directly scatter and disappear in itself
Amount, but because multikilowatt high-capacity optical fiber laser tends to using short optical fiber to reduce nonlinear effect so that have
The front end thermal power densities of source optical fiber are larger, optical fiber heat accumulation temperature drift.Therefore in order to ensure coat in safe temperature
In the range of run, it is necessary to the temperature control of precision is carried out to optical fiber, the present invention is proposed with a kind of disturbed flow type microchannel heat sink pair
Two meters of Active Optical Fiber leading portion is radiated, to reach the uniform purpose of fiber surface temperature.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of disturbed flow type microchannel for high-capacity optical fiber laser
Radiator, the device can reduce Active Optical Fiber front end high temperature.
Radiator of the invention, is made up of substrate and capping, has two groups of parallel microchannels in the substrate, in microchannel
Both sides respectively have an intake channel for cooling medium, have in the middle of two groups of parallel microchannels an outlet for cooling medium lead to
Road, the head position of exit passageway has a flow-disturbing cylindrical passageway, and the flow-disturbing cylindrical passageway is on the one hand as a cooling medium
Intake channel, local dip on the other hand is carried out to the cooling medium in exit passageway；There is conduit in the capping, for putting
Put optical fiber.
The area of the flow-disturbing cylindrical passageway is the 1/10 of inducer flow area.
During the principle of the radiator is the optical fiber running of continuous spectrum, after fibre core temperature is raised, optical fiber jacket
During heat is through microchannel capping conduction to microchannel, with the cooling medium in microchannel（Water or other fluids）Carry out heat exchange,
Take away most of heat.
Capping material is the thermal conductivity factor such as aluminium, or copper, silicon, aluminium alloy other metals or non-metallic material higher
Material.Closure surface has etched the conduit that width is 1mm ~ 2mm, and channel shape can be V-type, U-shaped, for placing long optical fibers.
The material of substrate is the thermal conductivity factor such as aluminium, or copper, silicon, aluminium alloy other metals or non-metallic material higher
Material.Microchannel cross section can be rectangle, or the other shapes such as trapezoidal.
Cooling medium can be the cryogenic medias such as water, ethanol, nano-fluid.
The course of work of the radiator is that a cooling medium part is at the uniform velocity entered in substrate by the import of substrate both sides
Cooling microchannel, another part flows into the fluid in substrate, with microchannel and enters through the flow-disturbing cylindrical passageway in substrate exit passage
Row mixing, to accelerate the reduction of the Cooling and Heat Source temperature difference, so as to further reduce the thermal resistance between optical fiber and radiator.The light of continuous spectrum
In fine running, after fibre core temperature is raised, the heat of optical fiber jacket is reached in microchannel through capping, and microchannel is by a part
Even heat diffuses to the cooling medium of microchannel（Water or other fluids）In carry out thermal convection current exchange, take away most of heat；
A part of even heat is conducted to substrate 4 in addition, substrate 4 directly scatters and disappears the partial heat.New radiator of the invention
After microchannel base internal adds special-shaped turbulence columns, the volume flow of cooling medium can be effectively improved, not increase Gao Gong
While rate optical fiber power is lost, most of heat of Active Optical Fiber is scattered and disappeared through heat transfer and thermal convection current mode.This microchannel
Internal flow pressure drop is big, and noise is small, uniform temperature fields, has the advantages that high reliability and operability.
Brief description of the drawings
Fig. 1 is heat spreader structures schematic diagram；
Fig. 2 is radiator closure construction figure；
Fig. 3 is radiator substrate schematic diagram；
In figure, 1- microchannels, 2- intake channels I, 3- intake channels II, 4- exit passageways, 5- flow-disturbing cylindrical passageways, 6- cappings,
7- conduits, 8- substrates.
Specific embodiment
Radiator of the invention, is made up of substrate and capping, has two groups of parallel microchannels in the substrate, in microchannel
Both sides respectively have an intake channel for cooling medium, have in the middle of two groups of parallel microchannels an outlet for cooling medium lead to
Road, the head position of exit passageway has a flow-disturbing cylindrical passageway, and the flow-disturbing cylindrical passageway is on the one hand as a cooling medium
Intake channel, local dip on the other hand is carried out to the cooling medium in exit passageway；There is conduit in the capping, for putting
Put optical fiber.
In force, substrate 8 is processed by Fig. 1 first, two groups of parallel microchannels 1, intake channel is milled out in substrate 8
I 2 and intake channel II 3, exit passageway 4, flow-disturbing cylindrical passageway 5.Capping 6 is processed by Fig. 2, and is covering 5 upper surfaces etching
Go out V-groove road 7, long optical fibers are placed in V-groove road 7.
Microchannel cross section is rectangle or trapezoidal.
Working medium is passed through in using the preceding intake channel I that will be covered shown in Fig. 2, intake channel II and flow-disturbing cylindrical passageway 5
Fluid.Fluid enters in the cooling duct of substrate 8, after being shunted through flow-disturbing cylindrical passageway 5, then by the fluid of microchannel substrate 8
Exit passageway 4 flows out radiator.
After the fluid that radiator is imported and exported is disturbed through flow-disturbing cylindrical passageway 5, the body of microchannel localized high temperature regions is increased
Product flow so that fluid at the uniform velocity passes in and out microchannel 1, reduces the temperature in the region.
Through being installed additional to the heat abstractor with CFD related softwares after the operating mode before and after flow-disturbing cylindrical passageway carries out numerical simulation,
Result is as shown in the table.The origin of coordinates is in radiator base center, and coordinate system is as shown in Figure 1.Inlet microchannel size is width
10mm 9mm high, inlet flow rate is 94.7kg/s.Turbulence columns channel internal diameter is 6mm, and 7mm high, inlet flow rate is 60kg/s.Fluid
Working medium is water.Substrate and the material of capping are aluminium.
The optical fiber maximum temperature that contrast is installed additional before and after flow-disturbing cylindrical passageway can be seen that after turbulence columns are installed additional, optical fiber heat
Point place temperature really with respect to unperturbed fluidization tower when decrease.
The above is presently preferred embodiments of the present invention, but the present invention should not be limited to disclosed in the embodiment and accompanying drawing
Content.So every do not depart from the lower equivalent or modification for completing of spirit disclosed in this invention, present invention protection is both fallen within
Scope.
Claims (6)
1. a kind of disturbed flow type microchannel heat sink for high-capacity optical fiber laser, it is characterised in that by substrate and capping group
Into, there are two groups of parallel microchannels in the substrate, respectively there is an intake channel for cooling medium in the both sides of microchannel, two
The head position for having an exit passageway for cooling medium, exit passageway in the middle of the parallel microchannel of group has a flow-disturbing cylindricality to lead to
Road, the flow-disturbing cylindrical passageway on the one hand as an intake channel for cooling medium, on the other hand to the cooling in exit passageway
Medium carries out local dip；There is conduit in the capping, for placing optical fiber.
2. radiator according to claim 1, it is characterised in that capping material is aluminium, copper, silicon or aluminium alloy.
3. radiator according to claim 1 and 2, it is characterised in that it is 1mm~2mm's that closure surface has etched width
Conduit, channel shape is V-type or U-shaped.
4. radiator according to claim 1, it is characterised in that the material of substrate is aluminium, copper, silicon or aluminium alloy.
5. radiator according to claim 1, it is characterised in that microchannel cross section is rectangle or trapezoidal.
6. radiator according to claim 1, it is characterised in that cooling medium is water, ethanol or nano-fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710184754.0A CN106785823A (en) | 2017-03-24 | 2017-03-24 | A kind of disturbed flow type microchannel heat sink for high-capacity optical fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710184754.0A CN106785823A (en) | 2017-03-24 | 2017-03-24 | A kind of disturbed flow type microchannel heat sink for high-capacity optical fiber laser |
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| Publication Number | Publication Date |
|---|---|
| CN106785823A true CN106785823A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710184754.0A Pending CN106785823A (en) | 2017-03-24 | 2017-03-24 | A kind of disturbed flow type microchannel heat sink for high-capacity optical fiber laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112670805A (en) * | 2020-12-31 | 2021-04-16 | 中国空间技术研究院 | Laser crystal direct-impact cooling type micro-channel radiator |
| CN115857131A (en) * | 2023-02-16 | 2023-03-28 | 中国航天三江集团有限公司 | Embedded adjustable high-heat-dissipation-performance laser stop diaphragm |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1558448A (en) * | 2004-02-06 | 2004-12-29 | 中国科学院广州能源研究所 | Silicon based micro passage heat exchanger |
| CN101867143A (en) * | 2010-06-22 | 2010-10-20 | 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 |
| CN102869236A (en) * | 2011-06-24 | 2013-01-09 | 通用电气公司 | Cooling device for a power module, and a related method thereof |
| CN203800372U (en) * | 2014-01-26 | 2014-08-27 | 江苏天元激光科技有限公司 | Coiling device for active optical fibers of optical fiber lasers |
| CN204103233U (en) * | 2014-10-15 | 2015-01-14 | 中国工程物理研究院总体工程研究所 | The even temperature coldplate in high-capacity optical fiber laser microchannel |
-
2017
- 2017-03-24 CN CN201710184754.0A patent/CN106785823A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1558448A (en) * | 2004-02-06 | 2004-12-29 | 中国科学院广州能源研究所 | Silicon based micro passage heat exchanger |
| CN101867143A (en) * | 2010-06-22 | 2010-10-20 | 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 |
| CN102869236A (en) * | 2011-06-24 | 2013-01-09 | 通用电气公司 | Cooling device for a power module, and a related method thereof |
| CN203800372U (en) * | 2014-01-26 | 2014-08-27 | 江苏天元激光科技有限公司 | Coiling device for active optical fibers of optical fiber lasers |
| CN204103233U (en) * | 2014-10-15 | 2015-01-14 | 中国工程物理研究院总体工程研究所 | The even temperature coldplate in high-capacity optical fiber laser microchannel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112670805A (en) * | 2020-12-31 | 2021-04-16 | 中国空间技术研究院 | Laser crystal direct-impact cooling type micro-channel radiator |
| CN112670805B (en) * | 2020-12-31 | 2022-09-02 | 中国空间技术研究院 | Laser crystal direct-punching cooling type micro-channel radiator |
| CN115857131A (en) * | 2023-02-16 | 2023-03-28 | 中国航天三江集团有限公司 | Embedded adjustable high-heat-dissipation-performance laser stop diaphragm |
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Application publication date: 20170531 |