Direct liquid cooling optical fiber beam combining device

Abstract

The utility model provides a direct liquid cooling optical fiber beam combining device, which comprises an outer package, a sleeve and an optical fiber beam combiner, a liquid cooling flow channel is arranged in the outer package, the sleeve extends along the direction of an optical path, a through hole extending along the direction of the optical path is arranged on the sleeve in a penetrating manner, and the sleeve penetrates through a main flow channel and the through hole to be isolated from the liquid cooling flow channel; the fused biconical taper ends of the input optical fibers are welded with the output optical fiber, and the optical fiber beam combiner is arranged in the through hole. According to the scheme, heat generated by the cone area of the beam combiner is directly taken away through water flow, then the heat dissipation capacity of the beam combiner is improved, the temperature of the cone area is reduced, optical fiber packaging and pipe sleeve packaging can be connected through dispensing or welding, and the leakproofness of a device flow channel is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of optical fiber combiner, especially to a directly water-cooled optical fiber combiner. BACKGROUND

[0002] At present, the power requirement of laser processing application to optical fiber laser is higher and higher, and the power bearing capacity of optical fiber combiner directly determines the final output power of optical fiber laser as an important device in optical fiber laser.

[0003] With the power improvement, the heat in the optical fiber combiner will also increase, which will cause the temperature in the combiner to rise, and the temperature rising to a certain extent will cause the combiner to burn out. This problem has gradually become the main limiting factor for the power improvement of the optical fiber combiner. By designing a better packaging method for heat dissipation, it becomes an important method to improve the power bearing of the optical fiber combiner. SUMMARY

[0004] The utility model aims at providing a kind of optical fiber combiner device of directly liquid cooling to improve heat dissipation efficiency.

[0005] In order to achieve the purpose of the utility model, the utility model provides a kind of optical fiber combiner device of directly liquid cooling, including outer package, sleeve and optical fiber combiner, liquid cooling flow channel is provided in outer package, liquid cooling flow channel includes sequentially communicated input flow channel, main flow channel and output flow channel, main flow channel is set through along light path direction and is provided with through hole at both ends respectively, input flow channel extends along side direction and is provided with input port at outer end, output flow channel extends along side direction and is provided with output port at outer end, side direction is perpendicular to light path direction;Sleeve extends along light path direction, sleeve is provided with through hole extending along light path direction, sleeve passes through main flow channel, the end of each sleeve is hermetically connected with the through hole of corresponding side, and the through hole is isolated from the liquid cooling flow channel;Optical fiber combiner includes a plurality of input optical fibers and an output optical fiber, a plurality of input optical fibers are fused and tapered to the output optical fiber, the optical fiber combiner is set in the through hole, a plurality of input optical fibers are led out from the first end of the through hole, and an output optical fiber is led out from the second end of the through hole.

[0006] Further scheme is that the first end of the through hole is fixed with a plurality of input optical fibers by dispensing.

[0007] Further scheme is that the second end of the through hole is fixed with an output optical fiber by dispensing.

[0008] Further scheme is that the end of the sleeve is hermetically connected with the through hole by dispensing or welding.

[0009] Further scheme is that the sleeve is located in the middle of the main flow channel, and the main flow channel surrounds the outer periphery of the sleeve.

[0010] Further, the outer package is provided with a positioning hole penetrating in the vertical direction along the outer periphery of the liquid cooling flow channel, and the light path direction and the side direction are arranged horizontally.

[0011] Further, the positioning hole is located at the edge of the outer package, and a positioning step is arranged at the positioning hole, and the positioning step is composed of a connected positioning plane and a limiting arc surface.

[0012] Further, the positioning step is provided with a side opening at the horizontal side and an upper opening above the vertical direction.

[0013] The utility model discloses a tube sleeve is encapsulated to the taper area formed after the fusion taper end of the fiber combiner, and the liquid cooling flow channel is designed in the outer package, the tube sleeve is installed in the inside of the liquid cooling flow channel, the heat generated by the combiner taper area is directly taken away through the water flow, and then the heat dissipation capacity of the combiner is improved, the taper area temperature is reduced, and the fiber encapsulation and the tube sleeve encapsulation can adopt the point gum or welding to be connected, improve the airtightness of the device flow channel, and in addition, the fiber combiner device of the case is applicable to the pump combiner and laser combiner, and they can use the encapsulation scheme to improve the heat dissipation capacity. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure diagram of the fiber combiner device embodiment of the utility model.

[0015] Figure 2 It is the structure diagram of the fiber combiner device embodiment of the utility model in another view.

[0016] Figure 3 It is the sectional view of the fiber combiner device embodiment of the utility model in the input flow channel.

[0017] Figure 4 It is the sectional view of the fiber combiner device embodiment of the utility model in the main flow channel.

[0018] Figure 5 It is the sectional view of the fiber combiner device embodiment of the utility model in the output flow channel.

[0019] The utility model will be further described below in connection with the drawings and embodiments. DETAILED DESCRIPTION

[0020] Reference Figures 1 to 5The optical fiber beam combining device comprises an outer package 1, a sleeve 2 and an optical fiber beam combiner. The outer package 1 is provided with a liquid cooling flow channel. The liquid cooling flow channel comprises an input flow channel 12, a main flow channel 11 and an output flow channel 13 which are sequentially communicated. The main flow channel 11 is provided through along an optical path direction X and is provided with a through hole 111 and a through hole 112 at two ends respectively. The diameters of the through hole 111 and the through hole 112 are smaller than the diameter of the main flow channel 11. The input flow channel 12 extends along a side direction Y and is provided with an input port at an outer end. The input port is connected with an interface 121. The output flow channel 13 extends along the side direction Y and is provided with an output port at an outer end. The output port is connected with an interface 131. The side direction Y is perpendicular to the optical path direction X. Both the side direction Y and the optical path direction X are arranged horizontally.

[0021] The sleeve 2 extends along the optical path direction X. The sleeve 2 is provided with a through hole 21 which extends along the optical path direction X. The sleeve 2 passes through the main flow channel 11. The end of each sleeve 2 is airtightly connected with the corresponding through hole 111 or 112. The end of the sleeve 2 is airtightly connected with the through hole 111 or 112 by means of point gluing or welding. The through hole 21 is isolated from the liquid cooling flow channel. The sleeve 2 is located at the middle part of the main flow channel 11. The main flow channel 11 surrounds the outer periphery of the sleeve 2.

[0022] The optical fiber beam combiner comprises a plurality of input optical fibers 31 and an output optical fiber 32. The manufacturing method and steps of the optical fiber beam combiner are as follows.

[0023] The quartz tube is pretreated. The quartz tube 33 is drawn to a certain diameter. The inner diameter is about 650 um. The outer diameter is about 980 um.

[0024] The input optical fibers are inserted into the pretreated quartz tube 33 after being cleaned.

[0025] The assembly of the input optical fibers 31 and the quartz tube 33 is stretched to a diameter of about 300 um by means of high-temperature heating and simultaneous fusion tapering.

[0026] The assembly after stretching is cut off at the region with a diameter of 300 um by a cutting knife. The end face is flat.

[0027] The assembly after cutting is fused with the output optical fiber 32 by a fusion equipment.

[0028] The assembly after fusion is assembled into the prepared sleeve 2. The two ends are fixed by point gluing. The fusion tapering end of the plurality of input optical fibers 31 is fused with the output optical fiber 32. The optical fiber beam combiner is arranged in the through hole 21. The plurality of input optical fibers 31 are led out from the first end of the through hole 21. The output optical fiber 32 is led out from the second end of the through hole 21. The first end of the through hole 21 is fixed with the plurality of input optical fibers 31 by point gluing 311. The second end of the through hole 21 is fixed with the output optical fiber 32 by point gluing 321.

[0029] The outer package 1 is provided with a positioning hole 14 penetrating in the vertical direction Z along the outer periphery of the liquid cooling flow channel, the positioning hole 14 is located at the edge of the outer package 1, the outer edge of the positioning hole 14 is provided with a positioning step 15, the positioning step 15 is composed of a connected positioning plane and a limiting arc surface, the positioning step 15 has a side opening in the horizontal side part and an upper opening provided vertically upward.

[0030] In the working process of the liquid cooling heat dissipation, the interfaces 121 and 131 are connected with the external liquid cooling circulating pump respectively, and then input and output the circulating cooling liquid for the liquid cooling flow channel, in the working process of the combiner, the heat generated by the taper zone of the combiner is directly taken away by the cooling liquid, so as to improve the heat dissipation capacity of the combiner and reduce the temperature of the taper zone.

[0031] From the above, the taper zone formed after the optical fiber combiner is fused and pulled at the taper end is packaged by the pipe sleeve, the liquid cooling flow channel is designed in the inner part of the outer package, the pipe sleeve is installed in the inner part of the liquid cooling flow channel, so that the heat generated by the taper zone of the combiner is directly taken away by the water flow, and then the heat dissipation capacity of the combiner is improved and the temperature of the taper zone is reduced, the optical fiber packaging and the pipe sleeve packaging can be connected by dispensing or welding, which improves the sealing of the flow channel of the device, in addition, the optical fiber combiner device is suitable for pump combiner and laser combiner, which can use the packaging scheme to improve the heat dissipation capacity.

Claims

1. A directly liquid-cooled fiber combiner apparatus, comprising: The application relates to an optical fiber combiner device. An outer package is provided with a liquid cooling flow channel, the liquid cooling flow channel comprises an input flow channel, a main flow channel and an output flow channel which are sequentially communicated, the main flow channel is provided through along an optical path direction and is provided with a through hole at both ends, the input flow channel extends along a side direction and is provided with an input port at an outer end, the output flow channel extends along a side direction and is provided with an output port at an outer end, and the side direction is perpendicular to the optical path direction; A sleeve extends along an optical path direction, the sleeve is provided with a through hole extending along the optical path direction, the sleeve passes through the main flow channel, the end of each sleeve is in close connection with the through hole on the corresponding side, and the through hole is isolated from the liquid cooling flow channel; An optical fiber combiner comprises a plurality of input optical fibers and an output optical fiber, the fusion taper ends of the plurality of input optical fibers are fused to the output optical fiber, the optical fiber combiner is arranged in the through hole, the plurality of input optical fibers are drawn out from the first end of the through hole, and the output optical fiber is drawn out from the second end of the through hole.

2. The optical fiber combiner device according to claim 1, wherein: The first end of the through hole is fixed with the plurality of input optical fibers through dispensing.

3. The optical fiber combiner device according to claim 1, wherein: The second end of the through hole is fixed with the output optical fiber through dispensing.

4. The optical fiber combiner device according to claim 1, wherein: The end of the sleeve is in close connection with the through hole through dispensing or welding.

5. The optical fiber combiner device according to claim 1, wherein: The sleeve is located in the middle part of the main flow channel, and the main flow channel surrounds the outer periphery of the sleeve.

6. The optical fiber combiner device according to any one of claims 1-5, wherein: The outer package is provided with a positioning hole through along a vertical direction at the outer periphery of the liquid cooling flow channel, and the optical path direction and the side direction are arranged horizontally.

7. The optical fiber combiner device according to claim 6, wherein: The positioning hole is located at the edge of the outer package, a positioning step is arranged at the positioning hole, and the positioning step is composed of a positioning plane and a limiting arc surface which are connected.

8. The optical fiber combiner device according to claim 7, wherein: The positioning step has a side opening at a horizontal side and an upper opening arranged vertically upward.

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