CN212676599U - Split type cooling disc for fiber laser resonant cavity and combination of split type cooling disc and resonant cavity - Google Patents
Split type cooling disc for fiber laser resonant cavity and combination of split type cooling disc and resonant cavity Download PDFInfo
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- CN212676599U CN212676599U CN202021585951.7U CN202021585951U CN212676599U CN 212676599 U CN212676599 U CN 212676599U CN 202021585951 U CN202021585951 U CN 202021585951U CN 212676599 U CN212676599 U CN 212676599U
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Abstract
The utility model relates to a cooling disc of optical resonator, in particular to split type cooling disc is used to fiber laser resonant cavity and combination with the resonant cavity thereof. The utility model aims at solving current fiber laser resonant cavity when the overlap joint, there is the butt fusion that needs many times sometimes, needs the technical problem of twining gain fiber again even, provides a fiber laser resonant cavity with split type cooling disc and with the combination of resonant cavity. The first cooling plate of the cooling plate is circular and is arranged in the central circular through hole of the second cooling plate; a first water cooling channel is arranged in the first cooling disc, a second water cooling channel is arranged in the second cooling disc, and a water outlet of the first water cooling channel is connected with a water inlet of the second water cooling channel through a water pipe; a thread groove is carved on the upper surface of the first cooling disc; the second cooling plate is provided with a high-reflection fiber grating fixing threaded hole group, a low-reflection fiber grating fixing threaded hole group, a first melting point groove and a second melting point groove. The combination includes a resonant cavity and the cooling plate.
Description
Technical Field
The utility model relates to a cooling disc of optical resonator, in particular to split type cooling disc is used to fiber laser resonant cavity and combination with the resonant cavity thereof.
Background
An optical resonant cavity is a cavity in which light waves are reflected back and forth to provide optical energy feedback. The resonant cavity of the fiber laser is generally composed of three parts, namely a high-reflection fiber grating, a gain fiber and a low-reflection fiber grating, wherein two ends of the gain fiber are respectively connected with the high-reflection fiber grating and the low-reflection fiber grating. The pumping light beam is excited to make transition when being transmitted in the gain fiber, and then the signal laser is output, and the signal laser is repeatedly oscillated in the resonant cavity under the action of the fiber gratings at the two ends of the gain fiber, and finally the signal laser is formed and output along the low-reflection fiber grating.
When the optical fiber laser works, the pump light excites the gain medium to realize energy transition, for example, the pump light with the wavelength of 980nm and the signal light with the wavelength of 1080nm are taken as the example, after the pump light with the wavelength of 1KW 980nm is absorbed and converted in the gain optical fiber, the signal light with the wavelength of 1080nm is finally output by about 750W, the efficiency of the realized light-light conversion (the pump light is converted into the signal light) is about 75 percent, namely about 25 percent of the pump light energy is lost in the form of heat energy. Therefore, the cooling disc is required to cool the resonant cavity of the fiber laser. The traditional method is that the fiber laser resonant cavity and other optical devices are tiled and fixed on the surface of a water-cooling disc, and are sequentially arranged and connected according to a certain arrangement sequence, so that the crossing and overlapping of optical fibers are avoided as much as possible, and the heat dissipation effect is prevented from being influenced. The gain fiber of the fiber laser resonant cavity device is usually arranged at the center position by adopting a spiral winding method, and the high-reflection fiber grating and the low-reflection fiber grating are respectively arranged at two sides of the gain fiber. Before the butt fusion, need with gain optical fiber fixed position, high reflection of light fiber grating and low reflection of light fiber grating fixed position, butt fusion point position are confirmed, and the butt fusion point of high reflection of light fiber grating and gain optical fiber is located between the two, and the butt fusion point of low reflection of light fiber grating and gain optical fiber is located between the two, and two butt fusion points are all placed in the butt fusion groove of fixing separately to treat the contact of butt fusion fiber head, the fixed protection of being convenient for. When actual overlap joint resonant cavity, receive factor influences such as equipment manual operation proficiency, be difficult to guarantee that disposable butt fusion is successful, sometimes even need many times butt fusion, along with the increase of butt fusion number of times, the link optic fibre of reserving is constantly consumed, shortened, can not guarantee that the splice point is located preset position department, under the severe condition, needs the gain optic fibre of twining again, reserves out new reservation length.
Disclosure of Invention
The utility model aims at solving current fiber laser resonant cavity when the overlap joint, the existence is influenced by factors such as equipment manual operation proficiency, is difficult to guarantee that disposable butt fusion is successful, needs the butt fusion many times sometimes to be difficult to guarantee that the splice point is located preset position department, under the severe condition, need twine the technical problem of gain optic fibre again, provide a fiber laser resonant cavity with split type cooling disc and with the combination of resonant cavity.
In order to solve the technical problem, the utility model provides a technical solution as follows:
the invention provides a split type cooling disc for a resonant cavity of a fiber laser, which is characterized in that: the cooling device comprises a first cooling disc and a second cooling disc, wherein the first cooling disc is circular, a circular through hole matched with the first cooling disc is formed in the center of the second cooling disc, and the first cooling disc is arranged in the circular through hole of the second cooling disc;
a first water cooling channel is arranged in the first cooling disc, and a first water inlet and a first water outlet of the first water cooling channel are both positioned on the lower surface of the first cooling disc; a second water cooling channel is arranged in the second cooling disc, and a second water inlet and a second water outlet of the second water cooling channel are both positioned on the lower surface of the second cooling disc; a first water outlet of the first water-cooling channel is connected with a second water inlet of the second water-cooling channel through a water pipe;
a thread groove for coiling and amplifying the gain optical fiber is carved on the upper surface of the first cooling disc;
the second cooling disc is provided with a high-reflection fiber grating fixing threaded hole group, a low-reflection fiber grating fixing threaded hole group, a first melting point groove and a second melting point groove;
the first melting point groove is positioned between the threaded groove and the high-reflectivity fiber grating fixing threaded hole group; the second melting point groove is positioned between the thread groove and the low-reflection fiber grating fixing thread hole group.
Furthermore, in order to enable the optical fibers to be welded to be in a head-to-head linear connection state, the first melting point groove and the second melting point groove are both guide grooves and are surrounded by two straight rods which are arranged on the upper surface of the second cooling plate in parallel.
Furthermore, in order to adapt to the size of the optical fiber to be welded, the first melting point groove and the second melting point groove are both 5-10mm in groove length, 0.5-1mm in groove width and 0.5-1mm in groove depth.
Further, because the gain optical fiber in the thread groove has larger heat quantity towards the outer circle, the thread groove adopts the Archimedes thread groove with the gradually increasing distance from the inner groove to the outer groove, in order to enable the gain optical fiber with certain strength to be coiled into the thread groove at the innermost circle better and not to leak light, the diameter of the smallest circle at the center of the Archimedes thread groove is 10-15 cm.
Further, in order to fit the size of the gain fiber, the groove depth of the archimedean screw groove is 0.5mm, and the groove width is 0.5 mm.
Further, in order to make two cooling plates connect fixedly reliably, avoid taking place relative rotation when the optical fiber butt fusion with the butt fusion after, influence the butt fusion effect of optic fibre, first cooling plate passes through the bayonet socket and sets up on the second cooling plate, the bayonet socket is located the second cooling plate in the circular through-hole outside, and along a plurality of axial second screw holes of circumference equipartition on it, a plurality of first screw holes with second screw hole position one-to-one are seted up to the lower limb of first cooling plate.
Furthermore, because the high-reflection fiber grating and the low-reflection fiber grating are both provided with 4 threaded holes, the high-reflection fiber grating fixed threaded hole group and the low-reflection fiber grating fixed threaded hole group both comprise 4 threaded holes, the 4 threaded holes of the high-reflection fiber grating fixed threaded hole group correspond to the 4 threaded holes of the high-reflection fiber grating, the 4 threaded holes of the low-reflection fiber grating fixed threaded hole group correspond to the 4 threaded holes of the low-reflection fiber grating, and the two fixed positions can be fixed by bolts during installation of the high-reflection fiber grating, so that the positioning effect is achieved, and the four fixed positions can be fastened by bolts.
Furthermore, the high-reflectivity fiber bragg grating fixing threaded hole group and the low-reflectivity fiber bragg grating fixing threaded hole group are respectively and symmetrically arranged on the second cooling discs on two sides of the first cooling disc along the radial direction of the first cooling disc.
Further, in order to realize sufficient heat dissipation, the first water-cooling channel and the second water-cooling channel both comprise a plurality of channels which are mutually intersected and communicated.
The invention also provides a combination of the split type cooling disc for the fiber laser resonant cavity and the resonant cavity, which is characterized in that: the split cooling disc for the fiber laser resonant cavity, the high-reflection fiber grating, the gain fiber and the low-reflection fiber grating are arranged on the split cooling disc;
the high-reflection fiber grating and the low-reflection fiber grating are respectively arranged at the high-reflection fiber grating fixing threaded hole group and the low-reflection fiber grating fixing threaded hole group through bolts;
the gain optical fiber disc is arranged in the thread groove;
the outermost end of the gain optical fiber is connected with the long-wavelength end of the high-reflection fiber grating end to end in the first melting point groove, and the innermost end of the gain optical fiber is connected with the long-wavelength end of the low-reflection fiber grating end to end in the second melting point groove.
The utility model discloses compare the beneficial effect that prior art has:
1. the utility model provides a fiber laser is split type cooling disc for resonant cavity and with the combination of resonant cavity, the cooling disc adopts split type structure, gain fiber and fiber grating (high reflection of light fiber grating and low reflection of light fiber grating) are placed respectively on the cooling disc of difference, and the cooling disc that gain fiber place is circular structure, it is central in the cooling disc that fiber grating is located to be embedded in, when needs fusion splice many times, gain fiber splice end loss is more, only need with the rotatory suitable angle of cooling disc that gain fiber place, can adjust the length of two fusion splice ends of gain fiber, it is more to have solved current fusion splice number of times, the splice point leads to can't placing the problem of correct position because of the consumption of fiber fusion length.
2. The utility model provides a split type cooling disc is used to fiber laser resonant cavity adopts split type design, and steerable cooling water business turn over order places the gain optic fibre on the first water-cooling disc, and the heat energy of production is great, and the cooling water of consequently outside access at first enters into first cooling disc, then flows into in the second cooling disc from first cooling disc to guarantee the effective refrigeration of gain optic fibre, improve refrigeration efficiency.
3. The utility model provides a split type cooling disc is used to fiber laser resonant cavity for the water-cooling disc of integral type, can divide into independent two parts separately with the water-cooling passageway, every partial water-cooling passageway length is shorter, conveniently punches the processing.
4. The split cooling disc for the resonant cavity of the optical fiber laser and the combination of the split cooling disc and the resonant cavity have the advantages that the two parts of water cooling discs are designed by adopting threaded holes, so that the two parts of water cooling discs are convenient to connect or disassemble, and can be separated when a gain optical fiber is coiled and carried, and the operation is convenient; when the water pipe needs to be communicated or welded, the two parts of the water cooling disc can be conveniently assembled into a whole.
Drawings
Fig. 1 is a schematic structural diagram of a split cooling plate for a resonant cavity of a fiber laser according to the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a view of FIG. 1 in another orientation;
FIG. 4 is an exploded view of FIG. 3;
fig. 5 is a schematic structural diagram of a first water cooling channel and a second water cooling channel in the split cooling plate for the fiber laser resonant cavity of the present invention;
fig. 6 is a schematic connection diagram of the split cooling plate for the fiber laser resonant cavity and the resonant cavity combination of the medium-high reflection fiber grating, the gain fiber and the low reflection fiber grating;
description of reference numerals:
1-a first cooling disc, 11-a first water cooling channel, 111-a first water inlet, 112-a first water outlet, 12-a thread groove and 13-a first thread hole;
2-a second cooling disc, 21-a circular through hole, 211-a bayonet, 2111-a second threaded hole, 22-a second water cooling channel, 221-a second water inlet, 222-a second water outlet, 23-a high-reflection fiber grating fixed threaded hole group, 24-a low-reflection fiber grating fixed threaded hole group, 25-a first melting point groove and 26-a second melting point groove;
3-water pipe, 4-high reflection fiber grating, 5-gain fiber, 6-low reflection fiber grating.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments.
The utility model provides a split type cooling disc is used to fiber laser resonant cavity, including first cooling disc 1 and second cooling disc 2, first cooling disc 1 is circular, and the circular through-hole 21 that matches with first cooling disc 1 is seted up at 2 centers on the second cooling disc, and first cooling disc 1 sets up on second cooling disc 2 through the bayonet 211 of the circular through-hole 21 department of second cooling disc 2, along 12 axial second screw holes 2111 of circumference equipartition on the bayonet 211, 12 first screw holes 13 with second screw hole 2111 position one-to-one are seted up to the lower limb of first cooling disc 1. A first water cooling channel 11 is arranged in the first cooling disc 1, and a water inlet and a water outlet of the first water cooling channel 11 are both positioned on the lower surface of the first cooling disc 1; a second water cooling channel 22 is arranged in the second cooling disc 2, and a water inlet and a water outlet of the second water cooling channel 22 are both positioned on the lower surface of the second cooling disc 2; the water outlet of the first water-cooling channel 11 is connected with the water inlet of the second water-cooling channel 22 through a water pipe 3; the first water-cooling channel 11 and the second water-cooling channel 22 both include a plurality of channels that are intersected with each other, and the first water-cooling channel 11 and the second water-cooling channel 22 are shown in perspective in the exploded view of fig. 5.
The upper surface of the first cooling disc 1 is carved with a thread groove 12 for coiling the gain fiber 5, the thread groove 12 can be a common thread groove 12 with equal interval, or an Archimedes thread groove 12 with gradually increasing groove interval from inside to outside, at this time, the groove depth is 0.5mm, the groove width is 0.5mm, and the diameter of the smallest circle at the center is 10-15 cm. The second cooling plate 2 is provided with a high-reflection fiber grating fixing threaded hole group 23, a low-reflection fiber grating fixing threaded hole group 24, a first melting point groove 25 and a second melting point groove 26; the high-reflection fiber grating fixing threaded hole group 23 and the low-reflection fiber grating fixing threaded hole group 24 are respectively and symmetrically arranged on the second cooling discs 2 on two sides of the first cooling disc 1 along the radial direction of the first cooling disc; the high-reflection fiber grating fixing threaded hole group 23 and the low-reflection fiber grating fixing threaded hole group 24 both comprise 4 threaded holes, the 4 threaded holes of the high-reflection fiber grating fixing threaded hole group 23 correspond to the 4 threaded holes of the high-reflection fiber grating 4 one by one, and the 4 threaded holes of the low-reflection fiber grating fixing threaded hole group 24 correspond to the 4 threaded holes of the low-reflection fiber grating 6 one by one; the first melting point groove 25 is positioned between the thread groove 12 and the high-reflectivity fiber bragg grating fixing thread hole group 23; the second melting point groove 26 is located between the threaded groove 12 and the low reflection fiber grating fixing threaded hole group 24.
The first melting point groove 25 and the second melting point groove 26 are both guide grooves and are formed by two straight rods which are arranged on the upper surface of the second cooling plate 2 in parallel in a surrounding mode, the groove length of the first melting point groove 25 and the groove length of the second melting point groove 26 are both 5-10mm, the groove width is both 0.5-1mm, and the groove depth is both 0.5-1 mm.
The invention also provides a combination of the split type cooling disc and the resonant cavity for the resonant cavity of the fiber laser, which comprises the split type cooling disc of the resonant cavity of the fiber laser, a high-reflection fiber grating 4, a gain fiber 5 and a low-reflection fiber grating 6; the high-reflection fiber grating 4 and the low-reflection fiber grating 6 are respectively installed at the high-reflection fiber grating fixing threaded hole group 23 and the low-reflection fiber grating fixing threaded hole group 24 through bolts; the gain optical fiber 5 is coiled in the thread groove 12; the outmost end of the gain fiber 5 is connected with the long-wavelength end of the high-reflection fiber grating 4 end to end in the first melting point groove 25, and the innermost end is connected with the long-wavelength end of the low-reflection fiber grating 6 end to end in the second melting point groove 26.
The working principle is as follows:
firstly, the gain optical fiber 5 is coiled along the thread groove 12, optical fibers with certain lengths are reserved at the innermost ring end and the outermost ring end during coiling, and then the high-reflection fiber grating 4 and the low-reflection fiber grating 6 are respectively installed and fixed. Place first cooling plate 1 in second cooling plate 2 middle circular through-hole 21 department, notice the screw hole one-to-one of guaranteeing two cooling plates, tailor the length of treating the fusion spliced optic fibre, guarantee that optic fibre under the condition of normal bending, the splice point can be placed in the melting point inslot that corresponds. Firstly, the fusion welding of the outermost ring of gain optical fiber end and the long wavelength end of the high-reflection fiber grating is completed, and then the fusion welding of the innermost ring of gain optical fiber end and the long wavelength end of the low-reflection fiber grating is completed. And after each welding, the melting point is placed and fixed in the corresponding melting point groove. The first cooling plate 1 and the second cooling plate 2 are fixedly connected by bolts. And finally, connecting the first water outlet 112 of the first water-cooling channel 11 of the first cooling plate 1 with the second water inlet 221 of the second water-cooling channel 22 of the second cooling plate 2. When the laser cooling device works, pumping light enters the resonant cavity from the high-reflection fiber grating 4, signal laser is formed after the pumping light is absorbed and oscillated in the resonant cavity, the signal laser is output from the low-reflection fiber grating 6, heat energy is generated in the whole working process, and the resonant cavity needs to be cooled by using a cooling disc. When the cooling plate works, cooling water enters from the first water inlet 111 of the first cooling plate 1, enters the second cooling plate 2 through the first water outlet 112 of the first cooling plate 1, and finally flows out from the second water outlet 222 of the second cooling plate 2.
In the fusion process, if the qualification rate of the outer ring gain optical fiber 5 and the high-reflection fiber grating 4 for connecting the melting points is low, multiple times of fusion are needed, and the first cooling disc 1 is rotated until the melting points of the two optical fibers can be completely placed in the first melting point groove 25. After the first cooling plate 1 rotates, the screw holes of the two cooling plates still need to be ensured to be in one-to-one correspondence. If the inner ring gain optical fiber 5 and the low reflection fiber grating 6 need to be welded for multiple times, the inner ring gain optical fiber 5 can be taken out from the runway to increase the connection length if necessary, so that the welding point can be placed in the second welding point groove 26. After the welding is completed, the first cooling plate 1 and the second cooling plate 2 are fixedly connected through bolts, and then the first water outlet 112 of the first cooling plate 1 and the second water inlet 221 of the second cooling plate 2 are connected.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and it is obvious for a person skilled in the art to modify the specific technical solutions described in the foregoing embodiments or to equally replace some technical features of the embodiments, and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions protected by the present invention.
Claims (10)
1. A split type cooling disc for a fiber laser resonant cavity is characterized in that: the cooling device comprises a first cooling disc (1) and a second cooling disc (2), wherein the first cooling disc (1) is circular, a circular through hole (21) matched with the first cooling disc (1) is formed in the center of the second cooling disc (2), and the first cooling disc (1) is arranged in the circular through hole (21) of the second cooling disc (2);
a first water cooling channel (11) is arranged in the first cooling disc (1), and a first water inlet (111) and a first water outlet (112) of the first water cooling channel (11) are both positioned on the lower surface of the first cooling disc (1); a second water cooling channel (22) is arranged in the second cooling disc (2), and a second water inlet (221) and a second water outlet (222) of the second water cooling channel (22) are both positioned on the lower surface of the second cooling disc (2); a first water outlet (112) of the first water-cooling channel (11) is connected with a second water inlet (221) of the second water-cooling channel (22) through a water pipe (3);
a thread groove (12) for coiling the gain optical fiber (5) is carved on the upper surface of the first cooling disc (1);
the second cooling disc (2) is provided with a high-reflection fiber grating fixing threaded hole group (23), a low-reflection fiber grating fixing threaded hole group (24), a first melting point groove (25) and a second melting point groove (26);
the first melting point groove (25) is positioned between the threaded groove (12) and the high-reflectivity fiber bragg grating fixing threaded hole group (23); the second melting point groove (26) is positioned between the thread groove (12) and the low-reflection fiber grating fixing thread hole group (24).
2. The split cooling plate for the fiber laser resonant cavity according to claim 1, wherein: the first melting point groove (25) and the second melting point groove (26) are both guide grooves and are surrounded by two straight rods which are arranged on the upper surface of the second cooling plate (2) in parallel.
3. The split cooling plate for the fiber laser resonant cavity according to claim 2, wherein: the first melting point groove (25) and the second melting point groove (26) are both 5-10mm in length, 0.5-1mm in width and 0.5-1mm in depth.
4. The split cooling plate for the fiber laser resonant cavity according to claim 1, wherein: the thread groove (12) is an Archimedes thread groove, and the diameter of the smallest circle at the center of the Archimedes thread groove is 10-15 cm.
5. The split cooling plate for the fiber laser resonant cavity according to claim 4, wherein: the depth of the Archimedes thread groove (12) is 0.5mm, and the width of the groove is 0.5 mm.
6. The split cooling plate for the fiber laser resonant cavity according to claim 1, wherein: first cooling plate (1) sets up on second cooling plate (2) through bayonet socket (211), bayonet socket (211) are located second cooling plate (2) in circular through-hole (21) outside, and a plurality of axial second screw holes (2111) along the circumference equipartition on it, and a plurality of first screw holes (13) that correspond one-to-one with second screw hole (2111) position are seted up to the lower limb of first cooling plate (1).
7. The split cooling plate for the fiber laser resonant cavity according to claim 6, wherein: high reflection of light fine grating fixed thread punch combination (23) with low reflection of light fine grating fixed thread punch combination (24) all contain 4 screw holes, 4 screw hole positions one-to-one from taking on 4 screw holes of high reflection of light fine grating fixed thread punch combination (23) and high reflection of light fine grating (4), 4 screw holes of low reflection of light fine grating fixed thread punch combination (24) and 4 screw hole positions one-to-one from taking on low reflection of light fine grating (6).
8. The split cooling plate for the fiber laser resonant cavity according to claim 1, wherein: the high-reflection fiber grating fixing threaded hole group (23) and the low-reflection fiber grating fixing threaded hole group (24) are respectively and symmetrically arranged on the second cooling discs (2) on two sides of the first cooling disc (1) along the radial direction.
9. The split cooling plate for the fiber laser resonant cavity according to claim 1, wherein: the first water-cooling channel (11) and the second water-cooling channel (22) both comprise a plurality of channels which are mutually intersected and communicated.
10. The utility model provides a combination of split type cooling disc and resonant cavity for fiber laser resonant cavity which characterized in that: comprising a split cooling plate for a fiber laser resonator according to any of claims 1 to 9, and a high reflection fiber grating (4), a gain fiber (5), a low reflection fiber grating (6);
the high-reflection fiber grating (4) and the low-reflection fiber grating (6) are respectively installed at the high-reflection fiber grating fixing threaded hole group (23) and the low-reflection fiber grating fixing threaded hole group (24) through bolts;
the gain optical fiber (5) is coiled in the thread groove (12);
the outermost end of the gain fiber (5) is connected with the long-wavelength end of the high-reflection fiber grating (4) end to end in the first melting point groove (25), and the innermost end of the gain fiber is connected with the long-wavelength end of the low-reflection fiber grating (6) end to end in the second melting point groove (26).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021585951.7U CN212676599U (en) | 2020-08-03 | 2020-08-03 | Split type cooling disc for fiber laser resonant cavity and combination of split type cooling disc and resonant cavity |
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| CN202021585951.7U CN212676599U (en) | 2020-08-03 | 2020-08-03 | Split type cooling disc for fiber laser resonant cavity and combination of split type cooling disc and resonant cavity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI820850B (en) * | 2022-08-10 | 2023-11-01 | 光合訊科技股份有限公司 | Water-cooling plate device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI820850B (en) * | 2022-08-10 | 2023-11-01 | 光合訊科技股份有限公司 | Water-cooling plate device |
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