CN102684044A - Optical fiber laser and cooling method thereof - Google Patents
Optical fiber laser and cooling method thereof Download PDFInfo
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- CN102684044A CN102684044A CN2012101263109A CN201210126310A CN102684044A CN 102684044 A CN102684044 A CN 102684044A CN 2012101263109 A CN2012101263109 A CN 2012101263109A CN 201210126310 A CN201210126310 A CN 201210126310A CN 102684044 A CN102684044 A CN 102684044A
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Abstract
The invention provides an optical fiber laser which comprises a plurality of optical devices, a cooling container, a circulating cooler and cooling liquid. The optical devices are arranged in the cooling container; the cooling container comprises a liquid inlet and a liquid outlet; the liquid inlet and the liquid outlet are respectively connected with the circulating cooler; the cooling liquid flows into the cooling container through the circulating cooler and the liquid inlet, so that the optical devices in the cooling container are soaked in the cooling liquid; and after flowing through the optical devices in the cooling container, the cooling liquid flows back into the circulating cooler through the liquid outlet. Correspondingly, the invention also provides a cooling method of the optical fiber laser. Therefore, according to the invention, the cooling efficiency of the optical fiber laser can be greatly improved, so that the output power of the optical fiber laser can be further improved.
Description
Technical field
The present invention relates to laser technology field, relate in particular to a kind of fiber laser and cooling means thereof.
Background technology
Fiber laser, the technological difficulties of the high-capacity optical fiber laser of the power of particularly several hectowatts to 10 kilowatt all are on the heat management of overall optical fibre laser and unit light device, are example with the pulse optical fiber of the power of 1KW; If power output is 1000 watts, the light light conversion efficiency by 70% calculates, and effectively pumping light power is (about 1000W ÷ 70%=1428.6W); Calculate by 5% bundling device loss, the pumping light power that advances before the bundling device is (about 1428.6W ÷ 95%=1503.8W), calculates by the electro-optical efficiency of pump laser 50%; The electrical power that need provide is (about 1503.8 ÷ 50%=3007.5W); And because fiber laser also has control circuits such as drive circuit, power converting circuit, and these all can have certain loss, the photoelectric transformation efficiency by 90% calculates; The total electric energy that enters into 1000 watts of fiber lasers is (about 3007.5W ÷ 90%=3341.7W); Thereby the photoelectric efficiency of overall optical fibre laser is (about 1000 ÷ 3341.7=29.92%, higher if the efficient of bundling device can be accomplished, whole efficient should be accomplished about 30%); The fiber laser of whole 1000 watts of output; The electrical power of input is wanted 3341.7 watts, has wherein that the electrical power about 2341.7 watts becomes heat about 70%, has lost; And the heat of these losses must try every possible means to dissipate fast; Otherwise the optical element in the fiber laser will damage because temperature is too high, thereby causes the overall optical fibre laser to burn out.This shows; The most crucial key issue of high-capacity optical fiber laser is the high-efficiency reliable heat management of overall optical fibre laser and optical device, just will control the temperature of optical element in the fiber laser; To dissipate the heat that produces as early as possible; Therefore, adopt the type of cooling appropriately and reliably, most important to high-capacity optical fiber laser.
Present 200 watts of high-capacity optical fiber lasers that power is above in the world because air blast cooling can not dissipate so big heat at short notice, therefore all adopt common water-cooled way basically; Promptly pumping source, bundling device, fiber grating, mix optical devices such as the active doubly clad optical fiber of rare earth, welding protection point and be installed in a high manufacturing accuracy, on the metal base plate of high flatness, the metal base plate bottom leads to cooling water or cooling fluid; During fiber laser work; The heat that above-mentioned optical device produces through transmission of heat by contact and radiant heat transfer, is led metal base plate with heat earlier; Metal base plate passes to heat the cooling water of circulation again; Taken away by cooling water, this mode is better than the radiating effect of air blast cooling, but radiating efficiency is still undesirable; Radiating rate is unhappy, has limited the possibility of the power output of further raising fiber laser.
Can know that to sum up the existing fiber laser obviously exists inconvenience and defective on reality is used, so be necessary to improve.
Summary of the invention
To above-mentioned defective, the object of the present invention is to provide a kind of fiber laser and cooling means thereof, it can improve the cooling effectiveness of fiber laser greatly, and then makes the power output that further improves fiber laser become possibility.
To achieve these goals; The present invention provides a kind of fiber laser; Include some optical devices, cooled containers, circulating cooling machine and cooling liquid; Said optical device partly or entirely is installed in the said cooled containers, and said cooled containers comprises inlet and liquid outlet, and said inlet is connected with said circulating cooling machine respectively with liquid outlet; Said cooling liquid flows into said cooled containers through said circulating cooling machine and said inlet; Make the said optical device in the said cooled containers be fully immersed in the said cooling liquid, said cooling liquid is flowed through behind the said optical device in the said cooled containers, flow back into said circulating cooling machine again through said liquid outlet.
According to fiber laser of the present invention, said optical device comprises some pumping sources, bundling device, fiber grating, Active Optical Fiber, weld, pumping leakage point and/or passive fiber.
According to fiber laser of the present invention, said fiber laser is the above high-capacity optical fiber lasers of 100 watts of power.
According to fiber laser of the present invention, said high-capacity optical fiber laser is high power jointed fiber laser or high power pulse fiber laser.
According to fiber laser of the present invention; Said high power jointed fiber laser comprises continuous seed source and double-cladding fiber amplifier; Said continuous seed source selectivity is installed in the said cooled containers, and all optical devices of said double-cladding fiber amplifier are installed in the said cooled containers; Perhaps
Said high power pulse fiber laser comprises pulse seed source and double-cladding fiber amplifier, and said pulse seed source selectivity is installed in the said cooled containers, and all optical devices of said double-cladding fiber amplifier are installed in the said cooled containers.
According to fiber laser of the present invention, said passive fiber and Active Optical Fiber are double clad passive fiber and double-cladding active optical fiber; The refractive index of the covering of said double clad passive fiber of the refractive index ratio of said cooling liquid and double-cladding active optical fiber is low, and said cooling liquid comprises cooling water or cooling solution.
According to fiber laser of the present invention, said fiber laser also comprises control circuit, and said control circuit is connected with said optical device; Tie point between tie point between said some pumping sources and said pumping source and the said control circuit carries out insulation processing.
According to fiber laser of the present invention, said fiber laser also comprises output collimator or collimation output isolator, and said output collimator or collimation output isolator include import and outlet; The liquid outlet of said cooled containers comprises first liquid outlet and second liquid outlet; Said first liquid outlet connects said circulating cooling machine; Said second liquid outlet connects the said import of said output collimator or collimation output isolator, and the said outlet of said output collimator or collimation output isolator connects said circulating cooling machine.
According to fiber laser of the present invention, be provided with metal base plate in the said cooled containers, said optical device is installed on the said metal base plate.
The present invention also provides a kind of cooling means of above-mentioned fiber laser, and said fiber laser includes some optical devices, cooled containers, circulating cooling machine and cooling liquid, and said cooled containers comprises inlet and liquid outlet, and said cooling means comprises:
Said optical device partly or entirely is installed in the said cooled containers;
Said inlet is connected with said circulating cooling machine respectively with liquid outlet;
Said cooling liquid flows into said cooled containers through said circulating cooling machine and said inlet, makes that the said optical device in the said cooled containers is fully immersed in the said cooling liquid;
Said cooling liquid is flowed through behind the said optical device in the said cooled containers, flow back into said circulating cooling machine again through said liquid outlet.
Fiber laser of the present invention adopts brand-new cooling heat dissipation scheme; Said fiber laser includes optical device, cooled containers, circulating cooling machine and cooling liquid; Said optical device comprises some pumping sources, bundling device, fiber grating, Active Optical Fiber, weld, pumping leakage point and/or passive fiber etc.; Said optical device partly or entirely is installed in the cooled containers; Cooled containers is connected with circulating cooling machine, and cooling liquid flows into through circulating cooling machine and is full of whole cooled containers, and the some or all of optical device of fiber laser all will be soaked in cooling liquid and fully cool off like this; Cooling liquid is flowed through and is being flowed back to the circulating water machine after the interior optical device of cooled containers is taken away heat, and so circulation is to realize the cooling heat dissipation to fiber laser.By a face heat conduction that contacts with metal base plate, the present invention is transformed into six complete heat conduction of face of optical device with respect to optical device in the prior art, and its radiating efficiency improves more than five times at least, thereby improves the cooling effectiveness of fiber laser greatly.Like this; The optical device under equal cause thermal damage threshold condition; If the power that bore originally is 1 kilowatt, the present invention then can bear many 5 times to 10 times power so, and making the power output of the single mode fiber laser of theoretic simple optical fiber output reach the myriawatt level becomes possibility.
Description of drawings
Fig. 1 is the structural representation of fiber laser of the present invention;
Fig. 2 is the structural representation of fiber laser in the first embodiment of the invention;
Fig. 3 is the structural representation of fiber laser in the second embodiment of the invention;
Fig. 4 is the structural representation of fiber laser in the third embodiment of the invention;
Fig. 5 is the structural representation of fiber laser in the fourth embodiment of the invention; And
Fig. 6 is the flow chart of the cooling means of fiber laser of the present invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 1 is the structural representation of fiber laser of the present invention; Said fiber laser 100 includes some optical device 10, cooled containers 20, circulating cooling machine 30 and cooling liquid; Said optical device 10 can comprise high power light devices such as some pumping sources, bundling device, fiber grating, Active Optical Fiber, weld, pumping leakage point and/or passive fiber; And said optical device 10 partly or entirely is installed in the cooled containers 20, and said passive fiber and Active Optical Fiber are double clad passive fiber and double-cladding active optical fiber.Said cooled containers 20 is preferably processed by antirust metal or plastic material; Said cooled containers 20 comprises the inlet 21 and liquid outlet 22 through the close processing of liquid; Inlet 21 is connected with circulating cooling machine 30 respectively with liquid outlet 22; Cooling liquid flows into cooled containers 20 through circulating cooling machine 30 and inlet 21; Make the optical device 10 in the cooled containers 20 be fully immersed in the said cooling liquid, cooling liquid is flowed through behind the optical device 10 in the cooled containers 20, flow back into circulating cooling machine 30 again through liquid outlet 22.Cooling liquid is through circulating cooling machine 30 inflows and be full of whole cooled containers 20; The some or all of optical device 10 of fiber laser 100 all will be soaked in the cooling liquid and be sufficiently cooled like this; Cooling liquid is flowing back to circulating water machine 30 after directly taking away the heat of optical device 10, and so circulation is to realize the liquid cooling heat radiation to fiber laser 100.
Preferably, said fiber laser 100 also comprises control circuit 40, and said control circuit 40 can comprise Drive and Control Circuit, monitoring temperature circuit, optical power monitoring circuit, circulating cooling machine supervisory circuit of fiber laser 100 etc.Control circuit 40 is connected with optical device 10, and the tie point between tie point between some pumping sources and pumping source and the control circuit 40 carries out waterproof insulation to be handled.Be preferably, be provided with metal base plate 50 in the said cooled containers 20, optical device 10 is installed on respectively on the metal base plate 50.
Be more preferably, said fiber laser 100 also comprises output collimator or collimation output isolator (not showing among Fig. 1), and output collimator or collimation output isolator include import and outlet; The liquid outlet 22 of cooled containers 20 comprises first liquid outlet and second liquid outlet; First liquid outlet connects circulating cooling machine 30; Second liquid outlet connects the import of output collimator or collimation output isolator; The outlet of output collimator or collimation output isolator connects circulating cooling machine 30, can divide one the tunnel output collimator or collimation output isolator carried out independent liquid cooling radiating treatment so in addition.
One, the refractive index of water is Celsius 15 to be about 1.33 when spending between 23 degree in water temperature, and is the same with the refractive index of the low-refraction glue used of protection weld, lower than the refractive index of the covering in the doubly clad optical fiber, so pump light can not leak the water inlet the inside.In like manner, the refractive index of cooling solution also requires lower than the refractive index of the covering in the doubly clad optical fiber.
Two, the polymer-coated layer of optical fiber can not be dissolved in the water under the normal temperature; And when producing bundling device; The boiling water that used doubly clad optical fiber and multimode fiber all will be put in 2 atmospheric pressure cookers with 130 degree Celsius boiled 48 hours; The coating layer characteristic of taking out multiple doubly clad optical fiber in back and multimode fiber does not change yet, and mechanical strength and refractive index do not have any change yet.So optical fiber is immersed in the cooling water for a long time, can exert an influence, thereby can guarantee the reliability and stability of the long-time use of fiber laser optical fiber properties.In like manner, be the same to the requirement of cooling solution, when long-time the immersion, can not dissolve the coat material of optical fiber.
Three, to connect electricity except pumping source, need prevent short circuit, all high-power fiber passive devices; Not needing special waterproof measure, and bundling device and fused fiber splice point, need directly be fully immersed in the water; Because the refractive index of water is low; Directly replace the low-refraction ultraviolet glue by water, the weld that drawing awl zone or optical fiber in the optical device can not leaked pump light, and the heat that directly under the high power situation, produces because there being loss these optical devices or contact is taken away very soon easily; Can not cause the temperature of optical device sharply to raise because of accumulation of heat and damage, the ability of the peak power that the same optical passive component of raising that can several times bears.
The present invention adopts brand-new cooling heat dissipation thinking; Promptly caloric value big main optic thermal source such as pumping source, bundling device, fiber grating, mix the active doubly clad optical fiber of rare earth, fused fiber splice protection point, the remaining Leakage Treatment contact of pumping; And the some or all of immersion types such as passive fiber that play connection and power transfer effect in the middle of these optical devices are placed in the cooling liquid of cooled containers; By cooling liquid these optical devices are carried out comprehensive, full-contact cooling.The cooling effectiveness of this liquid cooling mode is concerning device such as pumping source, bundling device, fiber grating and welding protection point, the remaining Leakage Treatment contact of pumping; The face heat conduction (supposing to comprise that optical device 10 is arranged at metal base plate 50) of one of former cause and Metal Contact; Become by one in the face of the heat conduction of Metal Contact face; Water or the direct heat conduction of cooling solution and all the other five faces are cooled; Radiating efficiency improves more than 5 times at least, and for rectangular cylindrical active doubly clad optical fiber (can be single covering), by original cylindrical one with the tangent line limit of metal base plate to metallic plate heat conduction; Become by all cylindrical optical fiber surfaces long-pending directly be cooled water or cooling solution heat conduction, the minimum raising of radiating efficiency is more than 10 times.Like this; Optical device 10 under equal cause thermal damage threshold condition; If the power that bore originally is 1 kilowatt, can bear many 5 times to 10 times power now at least, as long as can guarantee the circulating cooling machine of enough power the enough cooling water or the cooling solution of uniform temperature fast are provided; Add the high power output collimator output laser that uses cooling water or cooling solution; Making the power output of fiber laser of the single mode of theoretic simple optical fiber output reach the myriawatt level becomes possibility, and in the practical engineering application, at least also can reach the single-mode laser power output more than 5 kilowatts.And make the reliability of the single mode fiber laser of power below 5 kilowatts to improve greatly.In pulse optical fiber, adopt same scheme, add the optical isolator that adopts cooling water or cooling solution to cool off, can obtain exporting the pulse optical fiber of average power 200W--2KW.
Fig. 2 is the structural representation of fiber laser in the first embodiment of the invention, and said fiber laser 100 is a high power jointed fiber laser, and it adopts the direct liquid cools heat sink conception of the full contact of immersion type.Upper strata box indicating has the cooling water of confession circulation or the liquid of cooling solution inflow and outflow and connects airtight mouth with the metal cooled containers that can not get rusty.All high power light devices are installed in the cooled containers the inside; Said high power light device comprises several pumping sources, Nx1 or (N+1) a large amount of heat generating components or welding contacts such as x1 bundling device, height anti-FBG (Fiber Bragg Grating, Fiber Bragg Grating FBG), Active Optical Fiber, weld, pumping leak point.Because pumping source is installed in cooled containers the inside, so pumping source need carry out the sealed insulation measure, so that play waterproof effect.The external circulating cooling machine of cooled containers; Circulating cooling machine advances cooled containers with interior low-temperature cooling water or cooling solution according to the direction pump shown in the arrow with 10～23 degrees centigrade; Make to be full of cooling water or cooling solution in the cooled containers that cooling water or cooling solution are flowed through after high power light devices such as pumping source, bundling device, the anti-FBG of height, Active Optical Fiber, weld, pumping leakage point directly take away heat, flow back to circulating cooling machine again; Cooling water or the cooling solution that becomes low temperature by circulating cooling machine cooling pump again advances cooled containers; So circulate, and guarantee flow velocity, flow and the fluid temperature of certain circulating cooling machine, just can well control cooling effect.In addition, fiber laser 100 also comprises the high power output collimator, and the high power output collimator includes import and outlet; The liquid outlet of cooled containers comprises first liquid outlet and second liquid outlet; First liquid outlet connects circulating cooling machine; Second liquid outlet connects the import of high power output collimator; The outlet of high power output collimator connects circulating cooling machine, and cooling water or the cooling solution of promptly telling another road come the high power output collimator is carried out cooling heat dissipation.
Fig. 3 is the structural representation of fiber laser in the second embodiment of the invention, and what they were different with first embodiment is, is placed on the cooled containers outside as the pumping source of one of high power light device.Because pumping source is need be electrically driven (operated); Being connected between connection between the pumping source and pumping source and the control circuit needs waterproof insulation, and that this insulation processing is got up is cumbersome, thereby the present embodiment scheme that adopts another one to simplify; Be exactly that a sun adjuster spare and Active Optical Fiber and weld, pumping leakage point etc. directly adopt the full liquid cools that immerses; And pumping source still adopts traditional being placed on the metallic plate, and logical again cooling water or cooling solution cool off below the metallic plate, and it need not carry out encapsulation process; But cooling effect can be weaker like this, and the volume of overall optical fibre laser 100 also can be greatly.
Fig. 4 is the structural representation of fiber laser in the third embodiment of the invention; Said fiber laser 100 is MOPA (Master Oscillator Power-Amplifier; MOPA) the high power jointed fiber laser of amplification mode, it adopts the direct liquid cools heat sink conception of the full contact of immersion type.Said high power jointed fiber laser 100 comprises continuous seed source and double-cladding fiber amplifier, promptly adopts the structure of continuous seed source+double-cladding fiber amplifier.Expression is with the metal cooled containers that can not get rusty in the square frame of upper strata.Because continuously the power ratio of seed source is lower, heating is not very big, and therefore the seed source alternative is installed in the cooled containers continuously, promptly said pulse seed source can the immersion type liquid cooling also can be without the immersion type liquid cooling; All optical devices of double-cladding fiber amplifier are installed in the cooled containers, and promptly all light paths of high-power fiber amplifying stage adopt the immersion type liquid cooling.Pumping source can be installed in the cooled containers the inside, but need carry out the sealed insulation measure; Pumping source also can be placed on the cooled containers outside, and cooling effect can be weaker like this, and volume also can be greatly.The external recirculated water cooling of cooled containers machine; Spend the cooled containers that advances to seal with interior cooling water or cooling solution pump to 23 degree to temperature more than 10; Be full of cooling water or cooling solution in the cooled containers and directly cool off optical device; Cooling water or cooling solution are flowing back to circulating cooling machine after taking away heat, and cooling water or the cooling solution that becomes low temperature by circulating cooling machine cooling pump again advances the cooled containers of sealing, so circulation; And guarantee flow velocity, flow and the fluid temperature of certain circulating cooling machine, just can well control cooling effect.In addition, fiber laser 100 also comprises the high power output collimator, and the high power output collimator includes import and outlet; The liquid outlet of cooled containers comprises first liquid outlet and second liquid outlet; First liquid outlet connects circulating cooling machine; Second liquid outlet connects the import of high power output collimator; The outlet of high power output collimator connects circulating cooling machine, and cooling water or the cooling solution of promptly telling another road come the high power output collimator is carried out cooling heat dissipation.
Fig. 5 is the structural representation of fiber laser in the fourth embodiment of the invention, and said fiber laser 100 adopts the high power pulse fiber laser, and it adopts the direct liquid cools heat sink conception of the full contact of immersion type.Said high power pulse fiber laser 100 comprises pulse seed source and double-cladding fiber amplifier, promptly adopts pulse seed source+double-cladding fiber amplifier structure.Expression is with the metal cooled containers that can not get rusty in the square frame of upper strata.The pulse seed source can be that the acousto-optic Q modulation pulse optical fiber is as seed source; Also can be to add the one-level predispersed fiber after the LD pulse modulation to put the pulse seed source of doing; Also can be the jointed fiber laser with acousto-optic modulator be modulated into adds the one-level predispersed fiber again after the pulse and puts the pulse seed source of doing; Because the power ratio in pulse seed source is lower; Heating is not very big, so pulse seed source alternative is installed in the cooled containers, promptly said pulse seed source can the immersion type liquid cooling also can be without the immersion type liquid cooling.All optical devices of double-cladding fiber amplifier are installed in the cooled containers, and promptly all light paths of high-power fiber amplifying stage adopt the immersion type liquid cooling.Pumping source can be installed in the cooled containers the inside, but need carry out the sealed insulation measure; Pumping source also can be placed on the cooled containers outside, and cooling effect can be far short of what is expected like this, and volume also can be greatly.The external recirculated water cooling of cooled containers machine; Spend the cooled containers that advances to seal with interior cooling water or cooling solution pump to 23 degree to temperature more than 10; Be full of cooling water or cooling solution in the cooled containers and directly cool off optical device; Cooling water or cooling solution are flowing back to circulating cooling machine after taking away heat, and cooling water or the cooling solution that becomes low temperature by circulating cooling machine cooling pump again advances the cooled containers of sealing, so circulation; And guarantee flow velocity, flow and the fluid temperature of certain circulating cooling machine, just can well control cooling effect.In addition, fiber laser 100 also comprises high power collimation output isolator, and high power collimation output isolator includes import and outlet; The liquid outlet of cooled containers comprises first liquid outlet and second liquid outlet, and first liquid outlet connects the import that circulating cooling machine 30, the second liquid outlets connect the high power output collimator, and the outlet of high power collimation output isolator connects circulating cooling machine 30.Cooling water or the cooling solution of promptly telling another road come high power collimation output isolator is carried out cooling heat dissipation.
Fig. 6 is the flow chart of the cooling means of fiber laser of the present invention; Said fiber laser 100 includes some optical device 10, cooled containers 20, circulating cooling machine 30 and cooling liquid; Cooled containers 20 comprises inlet 21 and liquid outlet 22, and said cooling means comprises that step has:
Step S601 partly or entirely is installed on optical device 10 in the cooled containers 20.
Step S602 is connected inlet 21 respectively with liquid outlet 22 with circulating cooling machine 30.
Step S603, cooling liquid flows into cooled containers 20 through circulating cooling machine 30 and inlet 21, makes that the optical device 10 in the cooled containers 20 is fully immersed in the said cooling liquid.
Step S604, cooling liquid flow through behind the optical device 10 in the cooled containers 20, flow back into circulating cooling machine 30 again through liquid outlet 22.
In sum; Fiber laser of the present invention adopts brand-new cooling heat dissipation scheme; Said fiber laser includes optical device, cooled containers, circulating cooling machine and cooling liquid; Said optical device comprises some pumping sources, bundling device, fiber grating, Active Optical Fiber, weld, pumping leakage point and/or passive fiber etc., and said optical device partly or entirely is installed in the cooled containers, and cooled containers is connected with circulating cooling machine; Cooling liquid is through the circulating cooling machine inflow and be full of whole cooled containers; The some or all of optical device of fiber laser all will be soaked in cooling liquid and fully cool off like this, and cooling liquid is flowed through and flowed back to the circulating water machine after optical device in the cooled containers is taken away heat, and so circulation is to realize the cooling heat dissipation to fiber laser.By a face heat conduction that contacts with metal base plate, the present invention is transformed into six complete heat conduction of face of optical device with respect to optical device in the prior art, and its radiating efficiency improves more than five times at least, thereby improves the cooling effect of fiber laser greatly.Like this; The optical device under equal cause thermal damage threshold condition; If the power that bore originally is 1 kilowatt, the present invention then can bear many 5 times to 10 times power so, and making the power output of the single mode fiber laser of theoretic simple optical fiber output reach the myriawatt level becomes possibility.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. fiber laser; It is characterized in that, include some optical devices, cooled containers, circulating cooling machine and cooling liquid, said optical device partly or entirely is installed in the said cooled containers; Said cooled containers comprises inlet and liquid outlet; Said inlet is connected with said circulating cooling machine respectively with liquid outlet, and said cooling liquid flows into said cooled containers through said circulating cooling machine and said inlet, makes that the said optical device in the said cooled containers is soaked in the said cooling liquid; Said cooling liquid is flowed through behind the said optical device in the said cooled containers, flow back into said circulating cooling machine again through said liquid outlet.
2. fiber laser according to claim 1 is characterized in that, said optical device comprises some pumping sources, bundling device, fiber grating, Active Optical Fiber, weld, pumping leakage point and/or passive fiber.
3. fiber laser according to claim 2 is characterized in that, said fiber laser is the above high-capacity optical fiber lasers of 100 watts of power.
4. fiber laser according to claim 3 is characterized in that, said high-capacity optical fiber laser is high power jointed fiber laser or high power pulse fiber laser.
5. fiber laser according to claim 4; It is characterized in that; Said high power jointed fiber laser comprises continuous seed source and double-cladding fiber amplifier; Said continuous seed source selectivity is installed in the said cooled containers, and all optical devices of said double-cladding fiber amplifier are installed in the said cooled containers; Perhaps
Said high power pulse fiber laser comprises pulse seed source and double-cladding fiber amplifier, and said pulse seed source selectivity is installed in the said cooled containers, and all optical devices of said double-cladding fiber amplifier are installed in the said cooled containers.
6. fiber laser according to claim 2 is characterized in that, said passive fiber and Active Optical Fiber are double clad passive fiber and double-cladding active optical fiber; The refractive index of the covering of said double clad passive fiber of the refractive index ratio of said cooling liquid and double-cladding active optical fiber is low, and said cooling liquid comprises cooling water or cooling solution.
7. fiber laser according to claim 2 is characterized in that said fiber laser also comprises control circuit, and said control circuit is connected with said optical device; Tie point between tie point between said some pumping sources and said pumping source and the said control circuit carries out insulation processing.
8. fiber laser according to claim 2 is characterized in that, said fiber laser also comprises output collimator or collimation output isolator, and said output collimator or collimation output isolator include import and outlet; The liquid outlet of said cooled containers comprises first liquid outlet and second liquid outlet; Said first liquid outlet connects said circulating cooling machine; Said second liquid outlet connects the said import of said output collimator or collimation output isolator, and the said outlet of said output collimator or collimation output isolator connects said circulating cooling machine.
9. fiber laser according to claim 2 is characterized in that, is provided with metal base plate in the said cooled containers, and said optical device is installed on the said metal base plate.
10. cooling means like each fiber laser of claim 1～9; Said fiber laser includes some optical devices, cooled containers, circulating cooling machine and cooling liquid; Said cooled containers comprises inlet and liquid outlet, and said cooling means comprises:
Said optical device partly or entirely is installed in the said cooled containers;
Said inlet is connected with said circulating cooling machine respectively with liquid outlet;
Said cooling liquid flows into said cooled containers through said circulating cooling machine and said inlet, makes that the said optical device in the said cooled containers is soaked in the said cooling liquid;
Said cooling liquid is flowed through behind the said optical device in the said cooled containers, flow back into said circulating cooling machine again through said liquid outlet.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103984064A (en) * | 2014-05-27 | 2014-08-13 | 深圳朗光科技有限公司 | Water-cooled packaging structure of optical fiber beam combiner |
| CN107681424A (en) * | 2016-08-01 | 2018-02-09 | 南京理工大学 | A kind of compact high power single mode fiber laser for monitoring power output |
| JP2018098307A (en) * | 2016-12-09 | 2018-06-21 | 株式会社フジクラ | Fiber laser device |
| CN110829157A (en) * | 2019-10-22 | 2020-02-21 | 中国人民解放军国防科技大学 | Optical fiber laser cooling device and method based on flowing low-boiling-point liquid |
| CN111900599A (en) * | 2020-06-19 | 2020-11-06 | 广芯微电子（广州）股份有限公司 | Q-switched pulse fiber laser seed source equipment |
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| CN107681424A (en) * | 2016-08-01 | 2018-02-09 | 南京理工大学 | A kind of compact high power single mode fiber laser for monitoring power output |
| JP2018098307A (en) * | 2016-12-09 | 2018-06-21 | 株式会社フジクラ | Fiber laser device |
| CN110829157A (en) * | 2019-10-22 | 2020-02-21 | 中国人民解放军国防科技大学 | Optical fiber laser cooling device and method based on flowing low-boiling-point liquid |
| CN111900599A (en) * | 2020-06-19 | 2020-11-06 | 广芯微电子（广州）股份有限公司 | Q-switched pulse fiber laser seed source equipment |
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Application publication date: 20120919 |