CN116365343A - A water-cooled cladding optical stripper - Google Patents

Abstract

The invention discloses a water-cooling cladding light stripper, which comprises an optical fiber, a water-cooling assembly and a locking assembly, wherein the optical fiber is connected with the water-cooling assembly through a connecting rod; the optical fiber is segmented and stripped unevenly along the propagation direction of the light beam; the stripping degree of the optical fiber is increased in sequence; the optical fiber is characterized in that the water cooling component is arranged on the outer side of the optical fiber and comprises a water cooling core and a water cooling shell, a water inlet and a water outlet are formed in the water cooling shell, a spiral groove is formed in the outer wall of the water cooling core, and a cooling water channel is formed between the water cooling core and the water cooling shell; the locking component is positioned at the light beam incident end and used for fixing the water cooling core and the water cooling shell. The stripping rate of the optical fiber is gradually increased along the light transmission direction so that the cladding light energy is approximately uniformly stripped; the water cooling core in the water cooling assembly is wrapped on the outer side of the optical fiber, and the spiral groove is formed in the outer wall of the water cooling core, so that cooling water can be limited in the groove, and rapid exchange of the cooling water and heat can be realized.

Description

A water-cooled cladding optical stripper

technical field

The invention relates to the technical field of fiber lasers, in particular to a water-cooled cladding optical stripper.

Background technique

Fiber laser refers to a laser that uses rare earth-doped glass fiber as a gain medium. Under the action of pump light, it is easy to form a power density increase in the fiber, resulting in "number inversion" of the laser energy level of the laser working substance. Add positive The feedback loop (constituting the resonant cavity) can form the laser oscillation output.

The use of double-clad fiber has greatly developed fiber lasers. The pump light does not need to be coupled into the core with a relatively small mode field diameter, but can be coupled into the inner cladding with a large core diameter, which reduces the difficulty of coupling and improves the efficiency. Active fiber usage efficiency. However, the residual cladding light in the double-clad fiber will not attenuate or leak along with the laser transmission, which reduces the beam quality output by the fiber laser. Therefore, it is necessary to rely on a cladding light stripper to strip the residual cladding light in the double-clad fiber.

When the cladding light stripper strips the cladding light in the double-clad fiber of the fiber laser, the stripped residual cladding light will be transmitted to the shell of the cladding light stripping device in space and generate heat. If the heat build-up cannot be effectively dissipated and exceeds the tolerance limit of the fiber coating, it will damage the fiber and fiber laser. The power of the residual cladding light will increase with the increase of the output power of the fiber laser, and the cladding light below 150W can be dissipated by directly attaching the cladding light stripper to the water cooling plate. As the output power of the fiber laser increases, the temperature generated by heat accumulation will become higher and higher. If efficient heat dissipation cannot be implemented, the coating layer of the fiber will be endangered, the fiber will be damaged, and the fiber laser will be damaged.

Contents of the invention

The technical problem to be solved by the present invention is to provide a water-cooled cladding light stripper in order to overcome the defect that the cladding light stripper in the prior art cannot efficiently dissipate heat under high power.

The present invention solves the above technical problems through the following technical solutions:

A water-cooled cladding light stripper, the water-cooled cladding light stripper includes an optical fiber, a water-cooled component and a locking component; the optical fiber is segmented and stripped non-uniformly along the beam propagation direction; the degree of stripping of the optical fiber increases sequentially The outer side of the optical fiber is provided with the water-cooling assembly, the water-cooling assembly includes a water-cooling core and a water-cooling shell, the water-cooling shell is provided with a water inlet and a water outlet, and the outer wall of the water-cooling core is provided with a spiral groove, A cooling water channel is formed between the water-cooling core and the water-cooling shell; the locking assembly is located at the incident end of the light beam and is used for fixing between the water-cooling core and the water-cooling shell.

In this solution, along the light transmission direction, the stripping rate of the optical fiber gradually increases so that the cladding light energy is approximately uniformly stripped; the water-cooled core in the water-cooled component is wrapped on the outside of the fiber, and there is The spiral groove can confine the cooling water in the groove to realize the rapid exchange of cooling water and heat; when the water-cooled cladding optical stripper inputs the beam forward, the stripping power is approximately uniform, and when the beam is input in the reverse direction, the stripping power is between The incident end is the largest, and the outgoing end is the smallest. Therefore, in addition to being used for fixing the water-cooled core, the locking assembly also has an indicating function, which is used to indicate the incident direction of the optical path.

Preferably, the optical fiber is divided into 6 sections, the stripping length of the first 5 sections is 1 cm, and the stripping length of the 6th section is 10 cm; the stripping rate of the first section is 10%, the stripping rate of the second section is 15%, and the stripping rate of the third section is 20%, the stripping rate of the fourth section is 25%, the stripping rate of the fifth section is 30%, and the stripping rate of the sixth section is 60%.

In this solution, the optical fiber can be stripped by corroding or destroying the surface of the optical fiber, and along the beam direction, the stripping rate is gradually increased until 100% of the cladding light is stripped. Divide the optical fiber in the cladding optical stripper into 6 sections, the stripping rate of the first section is 10%, the stripping rate of each section from the second end is 5% higher than that of the previous section, and the stripping rate of the last section is 60%, which can withstand at least Heat dissipation during cladding light stripping of 2000W.

Preferably, the ratio of the width to the depth of the spiral groove is not less than 2.

In this scheme, the size of the cold water channel is relatively large, the flow speed of the cooling water is fast, and the heat exchange efficiency is high.

Preferably, there is a water inlet sealing assembly and a water outlet sealing assembly between the water cooling shell and the water cooling core, the water inlet sealing assembly, the water inlet, the water outlet, the water outlet sealing assembly and Cooling water passages are formed between the water cooling components.

In this solution, the water enters from the water inlet and flows out from the water outlet. During this process, the heat is taken out. Using the water inlet sealing assembly and the water outlet sealing assembly can limit the cooling water in the cooling assembly to a relatively stable channel. , improve heat transfer efficiency.

Preferably, the water inlet and the water inlet sealing assembly are arranged from top to bottom to form a stepped structure; and/or the water outlet and the water outlet sealing assembly are arranged from top to bottom to form a stepped structure .

In this solution, the sealing assembly is arranged under the water inlet/outlet, and will not be damaged by the sharp angle of the water inlet or the water outlet on the water-cooling shell when disassembled.

Preferably, the water inlet sealing assembly is a water inlet sealing ring, and the water outlet sealing assembly is a water outlet sealing ring.

In this solution, the O-ring is selected, which can not only suppress the leakage of the cooling liquid in the water-cooling assembly, but also stably reduce the rotation of the water-cooling core itself.

Preferably, both ends of the water cooling core are provided with a water inlet sealing groove and a water outlet sealing groove, the water inlet sealing ring is installed on the water inlet sealing groove, and the water outlet sealing groove is installed on the water outlet sealing groove. The sealing ring of the water outlet, the depth of the sealing groove of the water inlet is smaller than the depth of the sealing groove of the water outlet.

In this scheme, the sealing groove of the water inlet and the sealing groove of the water outlet are used to install the radial sealing ring, thereby confining the cooling water in the spiral groove; when the depth of the sealing groove of the water inlet is smaller than the depth of the sealing groove of the water outlet At this time, the water flow will flow more to the water outlet, driving the conversion of heat.

Preferably, the locking assembly includes a tightening hole provided on the water-cooling casing, and screws are matched with the tightening hole to limit the rotation of the water-cooling core.

In this solution, the water-cooling shell and the water-cooling core are respectively provided with locking holes and locking threads, and the rotation of the water-cooling core in the water-cooling shell can be restricted by locking with screws. In addition, since the cladding optical stripper has directionality, the locking holes and tightening screws on the outer wall of the water-cooled housing can indicate the input direction of the optical path of the cladding optical stripper.

Preferably, the two ends of the water-cooled cladding optical stripper are equipped with optical fiber fixing parts, and the optical fiber fixing parts are fixed in the water-cooling core through connecting parts.

In this solution, the optical fiber fixing member is used to fix the pigtail optical fiber to improve the firmness of the optical fiber connection.

Preferably, the optical fiber fixing member is mounted on the water-cooled core by screwing or glueing.

In this scheme, threaded or glued connection is adopted, which is convenient for disassembly and replacement, and the assembly efficiency is higher.

The positive effects of the present invention are:

Along the light transmission direction, the stripping rate of the optical fiber gradually increases so that the cladding light energy is approximately uniformly stripped; the water-cooled core in the water-cooled component is wrapped on the outside of the optical fiber, and a spiral groove is provided on the outer wall of the water-cooled core. The cooling water can be confined in the groove to realize the rapid exchange of cooling water and heat; when the water-cooled cladding optical stripper inputs the beam forward, the stripping power is approximately uniform; when the beam is input in the reverse direction, the stripping power is maximum at the incident end, Therefore, in addition to fixing the water-cooled core, the locking assembly also has an indication function, which is used to indicate the incident direction of the light path.

Description of drawings

Fig. 1 is a schematic structural view of a water-cooled cladding optical stripper in an embodiment of the present application;

FIG. 2 is a schematic diagram of the overall structure of a water-cooled cladding optical stripper in an embodiment of the present application;

Fig. 3 is a schematic diagram of stripping power and temperature rise when the water-cooled cladding light stripper works along the beam direction in an embodiment of the present application;

FIG. 4 is a schematic diagram of the stripping rate of the water-cooled cladding optical stripper in an embodiment of the present application.

reference sign

Water cooling core 1

Water-cooled shell 2

Fiber Fixture 3

Fiber 4

Water inlet 21

Outlet 22

lock assembly 23

Water inlet sealing groove 11

Outlet sealing groove 12

Compression screw 13

Detailed ways

As shown in Figure 1-4, a water-cooled cladding optical stripper, the water-cooled cladding optical stripper includes an optical fiber 4, a water-cooled assembly and a locking assembly 23; the optical fiber 4 is segmented and non-uniformly stripped along the beam propagation direction; the optical fiber The peeling degree of 4 increases successively; the outer side of the optical fiber 4 is provided with a water-cooling assembly, the water-cooling assembly includes a water-cooling core 1, a water-cooling shell 2, and the water-cooling shell 2 is provided with a water inlet 21 and a water outlet 22, and the outer wall of the water-cooling core 1 is provided with a spiral The groove forms a cooling water channel between the water-cooling core 1 and the water-cooling shell 2; the locking assembly 23 is located at the incident end of the light beam, and is used for fixing the water-cooling core 1 and the water-cooling shell 2 .

As shown in Figure 1-2, the water-cooling core 1 is wrapped outside the optical fiber 4, and the two ends of the water-cooling shell 2 are respectively provided with a water inlet 21 and a water outlet 22 along the beam transmission direction. In this embodiment, the beam transmission direction is from left to right. The left side of the water inlet 21 is provided with a water inlet sealing groove 11, and the water inlet 21 and the water inlet sealing groove 11 are distributed in steps from top to bottom. There are tightening holes, and the water-cooling core 1 and the water-cooling shell 2 can be fixed through the tightening holes and the tightening screws 13 .

Along the light transmission direction, the optical fiber in the water-cooled cladding light stripper is divided into multiple sections, and the stripping rate of the optical fiber in each section is gradually increased so that the cladding light energy is approximately evenly stripped; the water-cooled core 1 in the water-cooled assembly is wrapped in On the outer side of the optical fiber, and on the outer wall of the water-cooled core 1, there is a spiral groove, which can confine the cooling water in the groove and realize the rapid exchange of cooling water and heat; The power is approximately uniform. When the light beam is input in the opposite direction, the stripping power is the largest at the incident end and the smallest at the exit end. Therefore, in addition to being used for fixing the water-cooled core 1, the locking assembly 23 also has an indicating function, which is used to indicate the incident direction of the light path .

Preferably, the optical fiber is divided into 6 sections, the stripping length of the first 5 sections is 1 cm, and the length of the sixth section is 10 cm; the stripping rate of the first section is 10%, the stripping rate of the second section is 15%, and the stripping rate of the third section is 20% , the stripping rate of the fourth section is 25%, the stripping rate of the fifth section is 30%, and the stripping rate of the sixth section is 60%. As shown in Figure 3 and Figure 4, the optical fiber of the water-cooled cladding light stripper can be stripped by corroding or destroying the appearance of the optical fiber, and along the direction of the beam, the stripping rate is gradually increased until 100% of the cladding light is stripped . Divide the optical fiber in the stripper into 6 sections, the stripping rate of the first section is 10%, the stripping rate of each section from the second end is 5% higher than that of the previous section, and the stripping rate of the last section is 60%, which can withstand at least 2000W package Heat dissipation during layer photo-stripping.

Preferably, the ratio of the width to the depth of the spiral groove is not less than 2. The size of the cold water channel in this embodiment is relatively large, it can accommodate a large amount of water, the flow speed of the cooling water is fast, and the heat exchange efficiency is high.

Preferably, a water inlet sealing assembly and a water outlet sealing assembly are provided between the water cooling shell 2 and the water cooling core 1, and cooling water is formed between the water inlet sealing assembly, the water inlet 21, the water outlet 22, the water outlet sealing assembly, and the water cooling assembly. aisle. The water flow enters from the water inlet 21 and flows out from the water outlet 22. During this process, the heat is taken out. Using the water inlet sealing assembly and the water outlet sealing assembly can limit the cooling water in the cooling assembly to a relatively stable channel, improving the exchange rate. Thermal efficiency.

Preferably, the water inlet 21 and the water inlet sealing assembly are arranged from top to bottom to form a stepped structure; and/or the water outlet 22 and the water outlet sealing assembly are arranged from top to bottom to form a stepped structure. As shown in Figure 1, an asymmetric stepped structure is used at both ends of the water-cooling core 1, and O-rings of different sizes are used on both sides, so that the sealing ring will not be disassembled by the water inlet 21 on the water-cooling shell 2 Or the acute angle damage of water outlet 22.

Preferably, the water inlet sealing component is a water inlet sealing ring, and the water outlet sealing component is a water outlet sealing ring. The water inlet sealing ring and the water outlet sealing ring are selected from O-rings, which can not only suppress the leakage of the cooling liquid in the water-cooling assembly, but also stably reduce the rotation of the water-cooling core 1 itself.

Preferably, both ends of the water cooling core 1 are provided with a water inlet sealing groove 11 and a water outlet sealing groove 12, and a water inlet sealing ring is installed on the water inlet sealing groove 11, and a water outlet sealing ring is installed on the water outlet sealing groove 12. Circle, the depth of the sealing groove 11 of the water inlet is less than the depth of the sealing groove 12 of the water outlet. The sealing groove 11 of the water inlet and the sealing groove 12 of the water outlet are used to install radial sealing rings, thereby constraining the cooling water in the spiral groove; when the depth of the sealing groove 11 of the water inlet is smaller than the depth of the sealing groove 12 of the water outlet , the water flow will flow to the water outlet 22 more, and the rapid flow of the water flow will also drive the rapid conversion of heat.

Preferably, the locking assembly 23 includes a tightening hole provided on the water-cooling casing, and the screws are matched with the tightening hole to limit the rotation of the water-cooled core 1 . As shown in Figure 3-4, due to the directionality of the cladding optical stripper, the locking screw 13 on the outer wall of the water-cooled housing 2 can indicate the input direction of the optical path of the cladding optical stripper, which can avoid reverse light guide and cause cladding The light stripper is broken.

Preferably, the two ends of the water-cooled cladding optical stripper are installed with optical fiber fixing parts 3, and the optical fiber fixing parts 3 are installed in the water-cooled core 1 through connecting parts. The fiber fixing member 3 is used to fix the pigtail to improve the firmness of the fiber connection.

Preferably, the optical fiber fixing member 3 is installed on the water-cooled core 1 by thread or glue. It is connected by thread or glue, which is convenient for disassembly and replacement, and the assembly efficiency is higher.

Although the specific implementation of the present invention has been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims (10)

1. A water-cooled clad light stripper, the water-cooled clad light stripper comprising:

the optical fiber is segmented along the beam propagation direction and is stripped unevenly; the stripping degree of the optical fiber is increased in sequence;

the optical fiber cooling device comprises a water cooling component, wherein the outer side of the optical fiber is provided with the water cooling component, the water cooling component comprises a water cooling core and a water cooling shell, the water cooling shell is provided with a water inlet and a water outlet, the outer wall of the water cooling core is provided with a spiral groove, and a cooling water channel is formed between the water cooling core and the water cooling shell;

and the locking assembly is positioned at the light beam incidence end and used for fixing the water cooling core and the water cooling shell.

2. The water-cooled clad optical stripper of claim 1 wherein the optical fiber is divided into 6 segments, the first 5 segments having a stripping length of 1cm and the 6 th segment having a stripping length of 10cm; the first section stripping rate is 10%, the second section stripping rate is 15%, the third section stripping rate is 20%, the fourth section stripping rate is 25%, the fifth section stripping rate is 30%, and the sixth section stripping rate is 60%.

3. The water-cooled clad light stripper of claim 2 wherein the ratio of the width to the depth of the helical groove is not less than 2.

4. The water-cooled clad light stripper of claim 3 having a water inlet seal assembly and a water outlet seal assembly between the water-cooled shell and the water-cooled core, the water inlet seal assembly, the water inlet, the water outlet seal assembly, and the water-cooled assembly forming a cooling water channel therebetween.

5. The water-cooled clad light stripper of claim 4 wherein the water inlet and the water inlet seal assembly are disposed from top to bottom to form a stepped configuration;

and/or the water outlet and the water outlet sealing assembly are arranged from top to bottom to form a step structure.

6. The water cooled clad light stripper of claim 5 wherein the water inlet seal assembly is a water inlet seal ring and the water outlet seal assembly is a water outlet seal ring.

7. The water-cooled clad light stripper of claim 6 wherein water-cooled core is provided with a water inlet seal groove and a water outlet seal groove at both ends, the water inlet seal groove is provided with the water inlet seal ring, the water outlet seal groove is provided with the water outlet seal ring, and the depth of the water inlet seal groove is smaller than the depth of the water outlet seal groove.

8. The water cooled clad light stripper of claim 1 wherein the locking assembly comprises a shrink hole disposed on the water cooled housing, a screw mated with the shrink hole to limit rotation of the water cooled core.

9. The water-cooled clad light stripper of claim 1, wherein the water-cooled clad light stripper is provided with fiber fixtures at both ends, the fiber fixtures being secured within the water-cooled core by connectors.

10. The water-cooled clad light stripper of claim 9, wherein the fiber holder is mounted to the water-cooled core by threading or gluing.

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