CN201450224U - Low cost single bar liquid refrigeration laser - Google Patents
Low cost single bar liquid refrigeration laser Download PDFInfo
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- CN201450224U CN201450224U CN2009200343985U CN200920034398U CN201450224U CN 201450224 U CN201450224 U CN 201450224U CN 2009200343985 U CN2009200343985 U CN 2009200343985U CN 200920034398 U CN200920034398 U CN 200920034398U CN 201450224 U CN201450224 U CN 201450224U
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Abstract
The utility model discloses a low cost single bar liquid refrigeration laser which comprises an upper liquid refrigeration block, a connection piece, an insulation piece, a positive pole connection piece, a connection piece fixing sheet and a lower refrigeration block; also comprises a micro positive pole block; the lower liquid refrigeration block, the micro positive pole block, the insulation piece, the negative pole connection piece and the upper liquid refrigeration block are connected successively from up down in multilayer mode; the lower liquid refrigeration block, the micro positive pole block, the insulation piece and the negative pole connection piece are respectively provided correspondent liquid inlet through holes and liquid outlet through holes; the upper liquid refrigeration block is provided with a liquid inlet hole and a liquid outlet hole which are in communication with each other by a connection hole; the liquid inlet holes are laminated up to form a liquid inlet channel; and the liquid outlet holes are laminated up to form a liquid outlet channel. The laser of the utility model achieves the advantages of simple manufacturing, low production cost, low pressure drop and low flow resistance of cooling medium, easy sealing, high heat dissipation ability, long life and high reliability; can fully meet the requirement of large power output heat dissipation of laser.
Description
Technical field
The utility model belongs to laser and makes the field, relates to a kind of semiconductor laser, especially a kind of novel low-cost single bar liquid refrigeration laser.
Background technology
Along with further developing of high power semiconductor lasers, the subject matter that is faced remains that conversion efficiency is low, reliability, stability difference and cost be than problems such as height, and these deficiencies have seriously restricted its application space.The performance of laser is except outside the Pass having with chip, also with the heat radiation of laser with encapsulate relevant.Reliability and stability in order to improve laser reduce production costs, and the semiconductor laser of designed for greater reliability encapsulating structure and high-efficiency heat radiation structure is necessary.
At present, high-power single array semi-conductor laser has heat conduction cooling type (Michael Leers, Konstantin Boucke, Manfred Gotz, et al., Thermal resistance in dependenceof diode laser packages, In:Mark S.Zediker eds.Proceedings of 56 SPIE, 2008.6876 (687609)) and micro channels liquid refrigeration mode (Rushikesh M.Patel, David K.Wagner, Allen D.Danner, Kam Fallahpour, Richard S.Stinnett, " Use ofmicro-channel cooling for high-power two-dimensional laser diode arrays ", SPIE, vol.634:466-474 (1992)) two kinds of packing forms.
For the heat conduction cooling type, the bulk of working under continuous wave mode is heat sink, owing to adopt passive radiating mode, be easy to generate laser temperature and rise, this will cause the wave length shift of laser, life-span and reliability decrease, therefore, its power output generally has only tens watts, owing to be passive radiating mode, it is just very difficult therefore to make the power of semiconductor laser expand to hectowatt from tens of watts.
The micro channels liquid refrigeration mode is commercially produced now, though it adopts active heat removal, heat-sinking capability strengthens, and the power of laser is greatly improved, but has following shortcoming:
1. operation and maintenance cost height.The micro channels liquid refrigerator need use deionized water as cooling fluid, to prevent the both positive and negative polarity conducting.And the low conductivity that must keep deionized water in use, so the operation and maintenance cost is very high.
2. difficulty of processing is big.The micro channels liquid refrigerator is normally by the stacked machine-shaping of which floor very thin copper sheet, inner microchannel is approximately 300 microns, in manufacture process, need process accurately each layer copper sheet, so that the microchannel after stacked is in the strong turbulent flow of the out-of-date formation heat-sinking capability of flow of liquid.Therefore, the accurate processing of microchannel refrigerator is a difficult point.
3. manufacturing cost height.Because the Precision Machining difficulty of microchannel refrigerator is quite big, its manufacturing cost also is very high.
4. useful life is short.In the process of laser works, if in the coolant (being generally deionized water) when having impurity, these impurity are easy to attached on the inwall of microchannel.On the one hand, these impurity particles may stop up the fluid passage of microchannel refrigerator, its refrigeration is reduced, thereby producing more serious heat concentrates, cause that laser output wavelength drifts about, spectrum widening, performance reliability and the lost of life, when serious even laser can be burnt.On the other hand, these impurity particles can cause the electrochemical corrosion of microchannel tube wall, may be when serious with the tube wall eating thrown of microchannel refrigerator, the fail safe of laser is caused greatly influence.These all badly influence the useful life of laser.
5. seal request height. because the flowing space of coolant is very narrow and small in the refrigerator of microchannel, therefore is easy to generate unnecessary pressure and falls, the coolant flow resistance is very big, the sealing difficulty.
The utility model content
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, a kind of novel low-cost single bar liquid refrigeration laser is provided, this semiconductor laser is satisfying under the condition of using power requirement, can reduce cost, reduce thermal resistance, overcome the excessive difficult point of coolant pressure drop simultaneously, satisfying the high-output power that guarantees laser under the prerequisite of beam quality.
The purpose of this utility model solves by the following technical programs:
This novel low-cost single bar liquid refrigeration laser comprises liquid refrigerating piece, negative pole brace, insulating trip, positive strap, brace stator, sealing ring and following liquid refrigerating piece, also includes little anodal piece; Described down liquid refrigerating piece, little anodal piece, insulating trip, negative pole brace and last liquid refrigerating piece is stacked from bottom to top successively links together; Described upper surface one side of liquid refrigerating piece down is provided with step, and step is provided with positive strap and brace stator; Described liquid refrigerating piece down, little anodal piece, correspondingly respectively on insulating trip and the negative pole brace be provided with going into fluid through-hole and going out fluid through-hole perpendicular to the plane, the corresponding respectively fluid through-hole that goes out that is provided with perpendicular to the plane on described positive strap and the brace stator, vertically be provided with liquid-entering hole and fluid hole on the lower surface of described upward liquid refrigerating piece, liquid-entering hole and fluid hole are communicated with by the connecting hole that is arranged in the liquid refrigerating piece, described liquid refrigerating piece down, little anodal piece, the liquid-entering hole of respectively going into fluid through-hole and last liquid refrigerating piece on insulating trip and the negative pole brace stacks gradually the back and forms to go into the liquid passage, described liquid refrigerating piece down, positive strap, the brace stator, little anodal piece, the fluid hole that respectively goes out fluid through-hole and last liquid refrigerating piece on insulating trip and the negative pole brace stacks gradually the back and forms liquid outlet channel; One end of described little anodal piece is provided with chip, and the positive pole-face of described chip and little anodal piece are fitted, and the negative pole face of chip and negative pole brace are fitted.
Above-mentioned little anodal piece is a metal derby, and going into of described little anodal piece is provided with radiating fin in the fluid through-hole.
Also be provided with heat sinkly between said chip and the little anodal piece, heat sink one side and little anodal piece are fitted, the positive pole-face applying of another side and chip.
The above-mentioned middle part of liquid refrigerating piece, little anodal piece, insulating trip and negative pole brace down is provided with the fixed via perpendicular to the plane, described middle part, lower surface of going up the liquid refrigerating piece is provided with screwed hole, described liquid refrigerating piece down is provided with bolt, described bolt passes down the fixed via on liquid refrigerating piece, little anodal piece, insulating trip and the negative pole brace respectively, is threaded onto in the screwed hole.
The fluid through-hole upper end of going into of above-mentioned liquid refrigerating piece down is provided with sealing ring.
The utlity model has following beneficial effect:
1) make simply, production cost is low.The utility model adopts the mode that increases fin on the circulation path of coolant to substitute microchannel of the prior art, effectively reduces difficulty of processing, thereby greatly reduces manufacturing cost.
2) can realize the high-power output of laser.Liquid refrigerating ability of the present utility model satisfies the job requirement of low duty ratio quasi c. w. fully, can realize powerful laser output.
3) the coolant flow resistance is little, pressure drop is low, easily sealing.The utility model has replaced microchannel of the prior art with radiating fin, has increased the free air space of coolant, thereby plays the reduction flow resistance, reduces the effect of pressure drop.
4) it is optional that coolant is imported and exported the position.The import and export of the coolant of the high power semiconductor lasers of the utility model preparation are optional, can design at same end face, also can be at both positive and negative polarity piece two ends.
5) heat-sinking capability is strong.The radiating fin that the utility model is provided with on the coolant circulation path can increase area of dissipation greatly, reaches to reduce the device thermal resistance, improves the purpose of heat-sinking capability.
6) life-span is long, reliability is high. have the advantages that according to high power semiconductor lasers provided by the utility model the life-span is long, reliability is high, stability is high and small.
Description of drawings
Fig. 1 is a structure disassembly diagram of the present utility model;
Fig. 2 is an assembling outline drawing of the present utility model;
Fig. 3 is the structural representation of little anodal piece 4 of the present utility model;
Fig. 4 is a profile of going up liquid refrigerating piece 1 of the present utility model;
Fig. 5 is the profile of liquid refrigerating piece 7 down of the present utility model;
Fig. 6 is the little anodal piece 4 of latticed fin of the present utility model;
Fig. 7 is the P-I curve chart of the 808nm semiconductor laser sample of the utility model preparation.
Wherein: 1 is last liquid refrigerating piece; 2 is the negative pole brace; 3 is insulating trip; 4 is little anodal piece; 5 is the brace stator; 6 are positive strap; 7 are following liquid refrigerating piece; 8 is plug; 9,26,17 and 18 be into fluid through-hole; 10,14,27 and 19 is fixed via; 11,12,13,22,21 and 20 be out fluid through-hole; 15 is radiating fin; 16 is chip; 23,24,25 are the positive strap fixing hole; 28 is sealing ring; 29 is the bolt head counterbore; 30 is the feed pathway changeover portion; 31 is step; 32 is connecting hole; 33 is liquid-entering hole; 34 is screwed hole; 35 is fluid hole; 36 is the negative pole wiring hole; 37 is liquid inlet.
Embodiment
Below in conjunction with accompanying drawing the utility model is done and to be described in further detail:
Referring to Fig. 1, Fig. 2, Fig. 4 and Fig. 5, novel low-cost single bar liquid refrigeration laser of the present utility model comprises liquid refrigerating piece 1 (negative pole piece), negative pole brace 2, insulating trip 3, positive strap 6, brace stator 5, little anodal piece 4 and following liquid refrigerating piece 7.Following liquid refrigerating piece 7, little anodal piece 4, insulating trip 3, negative pole brace 2 and last liquid refrigerating piece 1 is stacked from bottom to top successively links together.Upper surface one side of following liquid refrigerating piece 7 is provided with step 31, and step 31 is provided with positive strap 6 and brace stator 5; Correspondingly respectively on following liquid refrigerating piece 7, little anodal piece 4, insulating trip 3 and the negative pole brace 2 be provided with going into fluid through- hole 9,26,17,18 and going out fluid through- hole 11,22,21,20 perpendicular to the plane.Corresponding respectively being provided with goes out fluid through- hole 12,13 perpendicular to the plane on positive strap 6 and the anodal stator 5; Vertically be provided with liquid-entering hole 33 and fluid hole 35 on the lower surface of last liquid refrigerating piece 1, liquid-entering hole 33 and fluid hole 35 are communicated with by the connecting hole 32 that is arranged in the liquid refrigerating piece 1, and the port of export of connecting hole 32 is provided with plug 8.Go into fluid through- hole 9,26,17,18 and liquid-entering hole 33 on each parts stack gradually the back and form to go into the liquid passage, and go out fluid through- hole 11,12,13,22,21,20 and fluid hole 35 on each parts stack gradually the back and form liquid outlet channel.Fluid through-hole 9 upper sheds place of going at following liquid refrigerating piece 7 are provided with sealing ring 28, guarantee the good seal of liquid passage.In order to reach good sealing effectiveness, also can be respectively respectively go into fluid through- hole 9,26,17,18 and respectively go out to be provided with between the fluid through- hole 11,22,21,20 rubber sealing 28, reach whole excellent sealing effect of going into liquid passage and liquid outlet channel.The middle part of following liquid refrigerating piece 7, little anodal piece 4, insulating trip 3 and negative pole brace 2 is provided with the fixed via 10,14,27,19 perpendicular to the plane.The middle part, lower surface of last liquid refrigerating piece 1 is provided with screwed hole 34, described liquid refrigerating piece 7 down is provided with bolt, described bolt passes down the fixed via 10,14,27,19 on liquid refrigerating piece 7, little anodal piece 4, insulating trip 3 and the negative pole brace 2 respectively, be threaded onto in the screwed hole 34, each parts is connected to one like this, as shown in Figure 2.
One end of above-mentioned little anodal piece 4 is provided with chip 16, the positive pole-face of chip 16 and little anodal piece 4 are fitted, the negative pole face of chip 16 and negative pole brace 2 are fitted. and the positive pole-face of chip 16 of the present utility model can directly be welded on an end of little anodal piece 4, also can between the positive pole-face of the upper surface of little anodal piece 4 and chip 16, add one heat sink, the positive pole-face of heat sink upper surface and chip 16 is fitted, the negative pole face of chip 16 and brace are fitted. the material of heat sink employing good heat conductivity, though can increase the heat dissipation path of chip 16 like this, also eliminate on little anodal piece 4 the thermal stress concentration phenomenon that direct core wire sheet 16 causes thermal coefficient of expansion not match causing to a great extent.
The material of little anodal piece 4 can use the material of metal (for example copper) or pottery good heat dissipation effect such as (for example AlN).Going into of little anodal piece 4 is provided with radiating fin 15 (as Fig. 3) in the fluid through-hole 26.Radiating fin 15 among the figure is Metal Flake, and it is set in parallel in the liquid-entering hole 26.Radiating fin 15 of the present utility model can also adopt anyly can reduce thermal resistance except adopting the form shown in Fig. 3, reaches the shape and structure of maximum radiating effect, as adopting radiator structures such as cylindrical heatsink, netted, star emitting shape.Fig. 6 is for adopting the little anodal piece of netted radiating fin.
Novel low-cost single bar liquid refrigeration laser of the present utility model is preparation like this:
(1) on little anodal piece 4, prepares the fluid through-hole 26 of coming in and going out, goes out fluid through-hole 22 and fixing hole 14 as Fig. 3, and on liquid-entering hole 26, process radiating fin 15, chip 16 is welded to the upper surface (as Fig. 1) of little anodal piece 4;
(2) little anodal piece 4, chip 16, insulating trip 3 and negative pole brace 2 are welded;
(3) as Fig. 4 and Fig. 5, liquid refrigerating piece 1 and following liquid refrigerating piece 7 in boring conduct on the copper billet;
(4) sealing ring 28 is placed on down the liquid-entering hole 9 and the fluid hole 11 upper port outer rings of liquid refrigerating piece 18 respectively, liquid-entering hole 26 and fluid hole 22 on little anodal piece 4, last liquid refrigerating piece 1 go into liquid half hole 33 and 35 lower port outer rings, fluid half hole;
(5) pass down liquid refrigerating piece 7, little anodal piece 4, insulating trip 3, brace 2 successively, go up the fixed via at liquid refrigerating piece 1 middle part with attachment screw, screw is spun in the screwed hole 34 on the liquid refrigerating piece 1 at last, each parts is closely coupled together, so just formed the high power semiconductor lasers based on liquid refrigerating of the present utility model.
Operation principle of the present utility model is as follows:
During work, making alive on positive strap 6 and negative pole wiring hole 36.Chip of laser 16 operate as normal, the circulating of Btu utilization cooling fluid of sending during work taken away.Cooling fluid is entered by the liquid inlet 37 that descends liquid refrigerating piece 7, passes through feed pathway changeover portion 30 to going into fluid through-hole 9, again going in the fluid through-hole 26 to little anodal piece 4.Cooling fluid forms turbulent flow in going into of following liquid refrigerating piece 7 in the fluid through-hole 9.Cooling fluid is full of liquid-entering hole 9, and directly little anodal piece 4 lower ends from fitting with chip 16 are taken away chip 16 and produced most heat; The after-heat that chip 16 produces can pass through little anodal piece 4, be transmitted on the radiating fin 15, cooling fluid is flushed to little anodal piece 4 radiating fins 15, heat on the radiating fin 15 is taken away, pass through insulating trip 3 afterwards successively, brace 2 is to the liquid-entering hole 33 of last liquid refrigerating piece 1, enter fluid hole 35 by connecting hole 32, pass through brace 3 more successively, insulating trip 2 and little anodal piece 4 go out fluid through- hole 20,21,22, after down the fluid through-hole 11 that goes out of liquid refrigerating piece 7 discharge, after leaving heat, cooling-water machine advances liquid inlet 37 again, cooling fluid is being gone into sealing fully in liquid passage and the liquid outlet channel, to prevent that revealing noise spectra of semiconductor lasers because of cooling agent causes damage.
Coolant of the present utility model is imported and exported the position except that adopting above-mentioned structure, also can adopt the liquid refrigerating piece to go into the mode of liquid and fluid.Coolant can also be imported and exported Position Design at upper and lower liquid refrigerating piece two ends, cooling fluid is one-way flow in laser like this.The circulation form of concrete cooling fluid will be determined flexibly according to the setting of the mounting means of laser and outside appurtenances.Upward liquid refrigerating piece, negative pole piece of the present utility model can adopt the structure of one, also can adopt independent structures.
Fixing hole of the present utility model can adopt structure as shown in Figure 1, also can use other structures, as long as guarantee that assembling back device architecture is stable.
According to laser structure of the present utility model, produced 808nm, the single array liquid refrigeration semiconductor laser of 250W, its structure is also as shown in Figure 2.Below provide every test result of the single array liquid refrigeration semiconductor laser of this 808nm:
(1) be illustrated in figure 7 as the L-I-V curve of the single array semi-conductor laser of 808nm sample, its highest Output optical power is 289.45W.
(2) (400Hz, 200us) under the condition of work of 250A, the test result of the single array semi-conductor laser of 808nm sample as shown in Figure 7 in pulse.At this moment, the threshold current of laser is 21.35A, and slope efficient is 1.31W/A, and typical electro-optical efficiency is 59.07%.
(3) Figure 7 shows that, the semiconductor laser sample that uses the utility model patent to make, wavelength 808nm, the spectrum test result of power 250W, its peak wavelength is 808.53nm, and centre wavelength is 808.53nm, and FWHM is 2.73nm, and FW90%E is 3.85nm.
The utility model is satisfying the micro channels liquid refrigeration form that has changed the conventional semiconductor laser employing under the condition of using power requirement, difficulty of processing and the high shortcoming of cost of effectively having avoided the processing MCA to bring, the circulation flow resistance that the utility model adopts the heat radiation form of fin not only to reduce cooling fluid has been avoided the excessive shortcoming of cooling fluid pressure drop, and because the fin machining difficulty is low, so greatly reduced production cost, and this fin heat radiation form can reach the equal radiating effect of MCA heat radiation, cooperate upper liquid refrigerating piece of the present utility model and lower liquid refrigerating piece, the utility model can reach preferably radiating effect. The utility model is mainly used in single array liquid refrigeration semiconductor laser.
Claims (5)
1. novel low-cost single bar liquid refrigeration laser, comprise liquid refrigerating piece (1), negative pole brace (2), insulating trip (3), positive strap (6), brace stator (5) and following liquid refrigerating piece (7), it is characterized in that, also include little anodal piece (4); Described down liquid refrigerating piece (7), little anodal piece (4), insulating trip (3), negative pole brace (2) and last liquid refrigerating piece (1) is stacked from bottom to top successively links together; Described upper surface one side of liquid refrigerating piece (7) down is provided with step (31), and step (31) is provided with positive strap (6) and brace stator (5); Described liquid refrigerating piece (7) down, little anodal piece (4), corresponding respectively being provided with gone into fluid through-hole (9 perpendicular to the plane on insulating trip (3) and the negative pole brace (2), 26,17,18) and go out fluid through-hole (11,22,21,20), corresponding respectively being provided with goes out fluid through-hole (12 perpendicular to the plane on described positive strap (6) and the brace stator (5), 13), vertically be provided with liquid-entering hole (33) and fluid hole (35) on the lower surface of described upward liquid refrigerating piece (1), liquid-entering hole (33) and fluid hole (35) are communicated with by the connecting hole (32) that is arranged in the liquid refrigerating piece (1), described liquid refrigerating piece (7) down, little anodal piece (4), respectively go into fluid through-hole (9 on insulating trip (3) and the negative pole brace (2), 26,17,18) and the liquid-entering hole (33) of last liquid refrigerating piece (1) stack gradually the back and form the liquid passage, described liquid refrigerating piece (7) down, positive strap (6), brace stator (5), little anodal piece (4), respectively go out fluid through-hole (11 on insulating trip (3) and the negative pole brace (2), 12,13,22,21,20) and the fluid hole (35) of last liquid refrigerating piece (1) stack gradually the back and form liquid outlet channel; One end of described little anodal piece (4) is provided with chip (16), and the positive pole-face of chip (16) and little anodal piece (4) are fitted, and the negative pole face of chip (16) and negative pole brace (2) are fitted.
2. novel low-cost single bar liquid refrigeration laser according to claim 1 is characterized in that: described little anodal piece (4) is a metal derby, and going into of described little anodal piece (4) is provided with radiating fin (15) in the fluid through-hole (26).
3. novel low-cost single bar liquid refrigeration laser according to claim 1, it is characterized in that: also be provided with heat sink between described chip (16) and the little anodal piece (4), heat sink one side is fitted with little anodal piece (4), and the positive pole-face of another side and chip (16) is fitted.
4. novel low-cost single bar liquid refrigeration laser according to claim 1, it is characterized in that: described liquid refrigerating piece (7) down, little anodal piece (4), the middle part of insulating trip (3) and negative pole brace (2) is provided with the fixed via (10 perpendicular to the plane, 14,27,19), described middle part, lower surface of going up liquid refrigerating piece (1) is provided with screwed hole (34), described liquid refrigerating piece (7) down is provided with bolt, described bolt passes down liquid refrigerating piece (7) respectively, little anodal piece (4), fixed via (10 on insulating trip (3) and the negative pole brace (2), 14,27,19), be threaded onto in the screwed hole (34).
5. novel low-cost single bar liquid refrigeration laser according to claim 1 is characterized in that: fluid through-hole (9) upper end of going into of described liquid refrigerating piece (7) down is provided with sealing ring (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200343985U CN201450224U (en) | 2009-08-31 | 2009-08-31 | Low cost single bar liquid refrigeration laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200343985U CN201450224U (en) | 2009-08-31 | 2009-08-31 | Low cost single bar liquid refrigeration laser |
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| Publication Number | Publication Date |
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| CN201450224U true CN201450224U (en) | 2010-05-05 |
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| CN2009200343985U Expired - Lifetime CN201450224U (en) | 2009-08-31 | 2009-08-31 | Low cost single bar liquid refrigeration laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011022923A1 (en) * | 2009-08-31 | 2011-03-03 | 西安炬光科技有限公司 | Cooling module for laser, manufacture method thereof and semiconductor laser including the same |
-
2009
- 2009-08-31 CN CN2009200343985U patent/CN201450224U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011022923A1 (en) * | 2009-08-31 | 2011-03-03 | 西安炬光科技有限公司 | Cooling module for laser, manufacture method thereof and semiconductor laser including the same |
| US8737441B2 (en) | 2009-08-31 | 2014-05-27 | Xi'an Focuslight Technologies Co., Ltd. | Cooling module for laser, fabricating method thereof, and semiconductor laser fabricated from the module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100505 Effective date of abandoning: 20090831 |