CN102916326A - YAG laser and water-cooling method thereof - Google Patents
YAG laser and water-cooling method thereof Download PDFInfo
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- CN102916326A CN102916326A CN2012103848916A CN201210384891A CN102916326A CN 102916326 A CN102916326 A CN 102916326A CN 2012103848916 A CN2012103848916 A CN 2012103848916A CN 201210384891 A CN201210384891 A CN 201210384891A CN 102916326 A CN102916326 A CN 102916326A
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Abstract
The invention discloses a YAG (Yttrium Aluminum Garnet) laser and a water-cooling method thereof. The laser comprises a water inlet, a cavity, a cavity base, a cooling sleeve, a pressure balancing slot and a jet ring, wherein the jet ring is horizontally fixed on the cooling sleeve through mounting positions at two ends, and supporting points at two ends of the jet ring are sealed by seal rings; and a suspension part in the middle of the jet ring and the inner channel wall of a cooling water channel form the pressure balancing slot. According to the invention, cooling water flows into the laser from the water inlet and is injected into the pressure balancing slot through the cooling water channel; the periphery of the pressure balancing slot is sealed by the seal rings, so that all the pressure of water flowing into the pressure balancing slot through the cooling water channel is exerted on the outer wall of the jet ring; after the pressure balancing slot is fully filled by the cooling water to obtain a certain water pressure, the water pressure is uniformly exerted on the jet ring; under the action of the water pressure, the cooling water forms jet water columns through jet holes uniformly distributed at the periphery of the jet ring, and the jet water columns are uniformly applied to a YAG rod to take a jet cooling effect; and owing to the uniform cooling water columns, the YAG rod is subject to uniform water pressure in the cooling process.
Description
Technical field
The invention belongs to field of lasers, more specifically, relate to the cooling means of a kind of YAG laser and laser water-cooled.
Background technology
At present, the solid state laser of high-power flash lamp pumping is in service at laser, owing to absorbing a large amount of pumping luminous energy, the YAG rod produces localized heat stress and thermal deformation, cause that beam reflection light field and hot spot pattern change, the conventional type of cooling can increase this distortional stress, and, cause the mechanical oscillation of YAG rod because of the inhomogeneous impact of current, cause the disturbance of resonant cavity zlasing mode and loss to increase, cause laser output power decline and degrade beam quality and beam-pointing bad stability etc.
The thermal deformation that causes in order to control strong laser irradiation, water cooling is superpower laser active cooling method commonly used always, but, in traditional cooling means cooling procedure, the fluid of water inlet is directly at the radially one-sided YAG rod that acts on, and the YAG rod is caused to a certain extent mechanical shock, and the YAG rod can produce additional deformation because of the pressure of cooling fluid, work long hours even can cause the skew of YAG rod position, cause the unstable and degrade beam quality of laser output power and direction.
Summary of the invention
Defective for prior art, the object of the present invention is to provide a kind of YAG laser, be intended to solve the fluid of water inlet in the prior art directly at the radially one-sided YAG of acting on rod, thereby the meeting of working long hours is so that the position skew of YAG rod causes the problem of the unstable and degrade beam quality of laser output power and direction.
The invention provides a kind of YAG laser, comprise water inlet, cavity, cavity base, cooling collar, balancing slit and jet ring; Described cavity is positioned on the described cavity base, has concentric and hard-wired inlet channel and cooling water channel in the described cavity; Inlet channel in described water inlet and the cavity is fixedly connected with; Cooling water channel in described cooling collar and the cavity is fixedly connected with, and is used for placing the YAG crystal bar in the described cooling collar; Described jet ring is fixed on the cooling collar by the installation site level at two ends, and with the airtight described jet ring two end supports point of sealing ring, the middle overhanging portion of described jet ring and the inner lead wall of described cooling water channel form described balancing slit.
Further, described jet ring is the cylindrical structure of hollow, described cylindrical side have a plurality of paired and with the jet orifice of circumference warp symmetry.
Further, described jet orifice is shaped as circle, rectangle or slit-shaped.
In the present invention, cooling water flows into laser from the water inlet; Through cooling water channel water is injected balancing slit; Adopt the airtight hydraulic pressure that flows into balancing slit from cooling water channel that can guarantee like this of sealing ring all to act on jet ring outer wall around the balancing slit, after balancing slit is filled with cooling water and is reached certain hydraulic pressure, the hydraulic pressure stepless action is in the jet ring, the jet ring is fixed in cooling collar by the installation site level at two ends, and with the airtight two end supports point of sealing ring, because the effect of hydraulic pressure, cooling water is by equally distributed jet orifice around the jet ring, form the stepless action of jet water column in the YAG rod, thereby reach the effect of jet cooling; Uniformly cooling water is annotated and guaranteed that the hydraulic pressure that the YAG rod is subject to is even in cooling procedure.
The present invention also provides a kind of cooling means that adopts above-mentioned YAG laser to carry out the laser water-cooled, comprises the steps:
S1: cooling water tank pumps into the laser water inlet with cooling water, and reaches balancing slit through cooling water channel;
S2: when reaching predetermined hydraulic pressure in the described balancing slit, cooling water forms uniform jet water column by the jet orifice of jet ring;
S3: described jet water column is realized the jet cooling around acting on equably the YAG crystal.
Further, described jet ring is the cylindrical structure of hollow, described cylindrical side have a plurality of paired and with the jet orifice of circumference warp symmetry.
Further, described jet orifice is shaped as circle, rectangle or slit-shaped.
The cooling means of laser water-cooled provided by the invention is compared with traditional cooling means, and advantage just is to have avoided starting up's moment, and the cooling water that cooling water tank pumps into impacts the unstable variation of the beam direction of bringing to the direct stress of YAG crystal.
Description of drawings
Fig. 1 is the cross-sectional view at the YAG laser water inlet place that provides of the embodiment of the invention;
Fig. 2 is jet structure of rings schematic diagram in the YAG laser that provides of first embodiment of the invention;
Fig. 3 is jet structure of rings schematic diagram in the YAG laser that provides of second embodiment of the invention;
Fig. 4 is the realization flow figure of the cooling means of the laser water-cooled that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 shows the structure of the YAG laser that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows:
A kind of YAG laser comprises water inlet 1, cavity, cavity base 3, cooling collar 5, balancing slit 6 and jet ring 7; Cavity is positioned on the cavity base 3, has concentric and hard-wired inlet channel and cooling water channel 2 in the cavity; Inlet channel in water inlet 1 and the cavity is fixedly connected with; Cooling water channel 2 in cooling collar 5 and the cavity is fixedly connected with, and is used for placing the YAG crystal bars in the described cooling collar 5; Described jet ring 7 is fixed on the cooling collar 5 by the installation site level at two ends, and with the airtight described jet ring 7 two end supports point of sealing ring, the middle overhanging portion of described jet ring 7 and the inner lead wall of described cooling water channel form described balancing slit 6.Wherein, jet ring 7 is the cylindrical structure of hollow, described cylindrical side have a plurality of paired and with the jet orifice of circumference warp symmetry.Jet orifice be shaped as circle, rectangle or slit-shaped.
4 is YAG crystal bar installation site, water inlet 1 is to connect the cavity inner lead by fastened by screw at cavity, in order to prevent that the junction from leaking, between adopted sealing ring airtight, cooling water channel 2 installation sites are to install with one heart in water inlet 1 water channel and the cavity, and the cooling water channel 2 in the cavity and jet ring 7 and balancing slit 6 all are installed on the cavity base 3.Water channel in the cavity base 3 is the T font, and jet ring 7 is installed in the infall of T word.Water channel on vertical is inlet channel, cross channel is exactly the water channel for cooling YAG crystal and installation crystal, jet ring 7 is installed in cross channel, on the vertical direction over against inlet channel, because the moulding of jet ring 7 is illustrated in figure 2 as the two ends arch brace, mid portion is unsettled, and two ends are fixed in cross channel and are adopted sealing ring airtight when mounted, and so overhanging portions are just and inner lead wall formation balancing slit 6 in the middle of jet ring 7.During cooling water flow impact jet flow ring 7, at first to will be full of in the balancing slit 6, then just remove to spray the YAG crystal by jet orifice.
The structure of jet ring 7 is mainly divided the two large divisions: one is the structure that profile is similar to I shape, mainly be for after fixing can and waterway wall between form balancing slit, make hydraulic pressure consistent at whole jet ring surface, reach the effect of all pressing; Another important structure is exactly the jet orifice on the jet ring surface, jet orifice different, can be that circle also can be rectangle or even narrow and small finedraw, the profile of jet orifice can be gone change according to designer's demand, it is exactly to want symmetrical that but an important principle is arranged, and jet orifice must be a pair of and symmetrical with respect to the circumference warp.Only in this way guarantee jet water column is symmetrical to the hydraulic pressure impact of YAG crystal, and hydraulic pressure can be cancelled each other, and does not have the hydraulic pressure on the one direction that the direction of YAG crystal is fluctuateed.
Jet orifice on the jet ring 7 outer surface circumference also can design according to different design requirements, and the shape of jet orifice can be that circular hole also can be tiny other shapes such as rectangle.Fig. 2 shows the jet orifice of circle hole shape, and Fig. 3 shows the jet orifice of clearance type.
In embodiments of the present invention, start-up of cooling system in the time of the laser normal operation, water tank pumps into laser to cooling water, and cooling water flows into laser from water inlet 1; Through cooling water channel 2 water is injected balancing slit 6; Adopt the airtight hydraulic pressure that flows into balancing slit 6 from cooling water channel that can guarantee like this of sealing ring all to act on jet ring 7 outer walls around the balancing slit 6, after balancing slit 6 is filled with cooling water and is reached certain hydraulic pressure, the hydraulic pressure stepless action is in jet ring 7, jet ring 7 is fixed in cooling collar 5 by the installation site level at two ends, and with the airtight two end supports point of sealing ring, because the effect of hydraulic pressure, cooling water is by equally distributed jet orifice 8 around the jet ring 7, form the stepless action of jet water column in the YAG rod, 4 position is the installation site of YAG crystal bar, thereby reaches the effect of jet cooling; Uniformly cooling water is annotated and guaranteed that the hydraulic pressure that the YAG rod is subject to is even in cooling procedure.
The YAG laser that the embodiment of the invention provides utilizes jet current principle to make cooling fluid acting on the YAG rod symmetrically, change flow field structure, thereby farthest reduce cooling fluid to the radial compression applied that the YAG rod produces, improve cooling effectiveness, improve laser power stability.
Fig. 4 shows the realization flow of the cooling means of laser water-cooled, specifically comprises the steps:
S1: cooling water tank pumps into the laser water inlet with cooling water, and reaches balancing slit through cooling water channel;
S2: when reaching predetermined hydraulic pressure in the balancing slit, cooling water forms uniform jet water column by the jet orifice of jet ring;
S3: the jet water column is realized the jet cooling around acting on equably the YAG crystal.
In embodiments of the present invention, jet ring 7 is enclosed within the outer position near water inlet of YAG crystal bar in the pump cavity, the current that water circulation begins rear water inlet 1 at first inject balancing slit 6, make the outer hydraulic pressure all around of ring consistent by balancing slit 6, again by equably water spray cooling on 8 pairs of YAG rods of jet orifice radial circumference of specific arrangement on the jet ring 7.Aperture on the jet ring 7 is symmetrical diametrically, has cancelled each other because the pressure that water column causes the YAG rod.So neither can weaken cooling effect, the compression shock that also can not cause YAG rod footpath to make progress, thus make the stable light beam quality, reliable of whole laser.
As one embodiment of the present of invention, the jet cooling method mainly is to realize by the jet ring, the shape of jet ring also is to change according to different application in different applied environments, the YAG crystal shape of common YAG laser the inside mainly is divided into cylindrical and cuboid on the market, the interior installed surface of jet ring is circumference for columniform crystal the time, be corresponding cuboid for installed surface in the crystal of cuboid formula, the size that concrete size can have more the YAG crystal is adjusted.
The cooling means of the laser water-cooled that the embodiment of the invention provides is compared with traditional cooling means, advantage just is to have avoided starting up's moment, and the cooling water that cooling water tank pumps into impacts the unstable variation of the beam direction of bringing to the direct stress of YAG crystal.
Those skilled in the art will readily understand; the above only is preferred embodiment of the present invention; not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a YAG laser is characterized in that, comprises water inlet, cavity, cavity base, cooling collar, balancing slit and jet ring;
Described cavity is positioned on the described cavity base, has concentric and hard-wired inlet channel and cooling water channel in the described cavity; Inlet channel in described water inlet and the cavity is fixedly connected with; Cooling water channel in described cooling collar and the cavity is fixedly connected with, and is used for placing the YAG crystal bar in the described cooling collar; Described jet ring is fixed on the cooling collar by the installation site level at two ends, and with the airtight described jet ring two end supports point of sealing ring, the middle overhanging portion of described jet ring and the inner lead wall of described cooling water channel form described balancing slit.
2. YAG laser as claimed in claim 1 is characterized in that, described jet ring is the cylindrical structure of hollow, described cylindrical side have a plurality of paired and with the jet orifice of circumference warp symmetry.
3. YAG laser as claimed in claim 1 is characterized in that, described jet orifice be shaped as circle, rectangle or slit-shaped.
4. a cooling means that adopts each described YAG laser of claim 1-3 to carry out the laser water-cooled comprises the steps:
S1: cooling water tank pumps into the laser water inlet with cooling water, and reaches balancing slit through cooling water channel;
S2: when reaching predetermined hydraulic pressure in the described balancing slit, cooling water forms uniform jet water column by the jet orifice of jet ring;
S3: described jet water column is realized the jet cooling around acting on equably the YAG crystal.
5. cooling means as claimed in claim 4 is characterized in that, described jet ring is the cylindrical structure of hollow, described cylindrical side have a plurality of paired and with the jet orifice of circumference warp symmetry.
6. cooling means as claimed in claim 4 is characterized in that, described jet orifice be shaped as circle, rectangle or slit-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210384891.6A CN102916326B (en) | 2012-10-10 | 2012-10-10 | YAG laser and water-cooling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210384891.6A CN102916326B (en) | 2012-10-10 | 2012-10-10 | YAG laser and water-cooling method thereof |
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| CN102916326A true CN102916326A (en) | 2013-02-06 |
| CN102916326B CN102916326B (en) | 2014-06-18 |
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| CN201210384891.6A Expired - Fee Related CN102916326B (en) | 2012-10-10 | 2012-10-10 | YAG laser and water-cooling method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107666106A (en) * | 2017-10-18 | 2018-02-06 | 哈尔滨工业大学 | A kind of 2 microns of Solid State Laser generating means of hectowatt grade |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040240496A1 (en) * | 2002-02-15 | 2004-12-02 | Shuichi Fujikawa | Rod type solid state laser |
| CN201327946Y (en) * | 2008-12-18 | 2009-10-14 | 深圳市大族激光科技股份有限公司 | Water cooling device |
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2012
- 2012-10-10 CN CN201210384891.6A patent/CN102916326B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040240496A1 (en) * | 2002-02-15 | 2004-12-02 | Shuichi Fujikawa | Rod type solid state laser |
| CN201327946Y (en) * | 2008-12-18 | 2009-10-14 | 深圳市大族激光科技股份有限公司 | Water cooling device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107666106A (en) * | 2017-10-18 | 2018-02-06 | 哈尔滨工业大学 | A kind of 2 microns of Solid State Laser generating means of hectowatt grade |
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| CN102916326B (en) | 2014-06-18 |
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