Heat dissipation device for double-clad fiber grating of high-power fiber laser

A double-clad fiber and fiber laser technology, which is applied to laser cooling devices, lasers, and laser components, can solve problems such as fiber gratings are easy to break, have a large expansion coefficient, and affect the service life of devices. It is easy to mass produce, The effect of simple package structure and low cost

Pending Publication Date: 2018-12-14
西安盛佳光电有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent No. CN201110264460.1 discloses a packaging device for double-clad fiber gratings for high-power fiber lasers. It encapsulates the bare fiber of double-clad fiber gratings in a metal shell, and pots them in the metal shell. There is a refractive index matching liquid, and the heat is dissipated by the refractive index matching liquid after passing through the fiber grating. However, because the fiber grating will generate a lot of heat when it is working, the refractive index matching liquid will evaporate under the long-term working state, which will affect the performance of the device. Service life; at the same time, due to the small expansion coefficient of the fiber Bragg grating, the expansion coefficient of the metal shell is relatively large, and because the expansion coefficient of the two materials is too different, the fiber Bragg grating is easy to break under high temperature conditions

Method used

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  • Heat dissipation device for double-clad fiber grating of high-power fiber laser
  • Heat dissipation device for double-clad fiber grating of high-power fiber laser
  • Heat dissipation device for double-clad fiber grating of high-power fiber laser

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Embodiment 1

[0042] see figure 1 , figure 2 . A heat dissipation device for double-clad fiber gratings for high-power fiber lasers, comprising an aluminum alloy shell 2 and an inner core 3 of silicon-aluminum alloy, and the shell 2 is pasted up and down by a shell cover 21 and a shell bottom 22 Combined into one body, the inner core 3 is arranged between the case cover 21 and the case bottom 22 . The shell cover 21 and the shell bottom 22 are planar plate-shaped structures, and both sides of the shell cover 21 and the shell bottom 22 are provided with threaded holes 6, and the shell cover 21 and the shell bottom 22 are fastened by being arranged in the threaded holes 6. The screw 5 fixes the inner core 3 between the shell cover 21 and the shell bottom 22, the grating section of the double-clad fiber grating 1 is nested in the inner core 3, and the optical fibers at both ends of the double-clad fiber grating grating section extend out of the shell 2 external.

[0043] see image 3 . ...

Embodiment 2

[0048] see Figure 5 , Image 6. A heat dissipation device for double-clad fiber gratings for high-power fiber lasers, comprising a copper alloy shell 2 and a silicon-aluminum alloy inner core 3, the shell 2 is composed of a shell bottom 22 and a shell cover 21, the The inner core 3 described above is arranged between the shell bottom 22 and the shell cover 21, and the lower surface of the shell cover 21 and the upper surface of the shell bottom 22 are glued together to fix the inner core 3 between the shell bottom 22 and the shell cover 21, The grating segment of the double-clad fiber grating 1 is embedded in the inner core 3 , and the optical fibers at both ends of the grating segment of the double-clad fiber grating extend out of the housing 2 .

[0049] Such as Figure 7 shown. The upper surface of the shell bottom 22 is horizontally provided with a core groove 9 that runs through the two ends of the shell bottom 22 and has a U-shaped cross-section. The length of the c...

Embodiment 3

[0054] see Figure 9 , Figure 10 and Figure 11 . A heat dissipation device for a double-clad fiber grating used in a high-power fiber laser, comprising an aluminum alloy shell 2 and an inner core 3 of silicon-aluminum alloy. The housing 2 is a plate-shaped structure, and the housing 2 is provided with a circular through hole 14 passing through both ends of the housing 2, and the middle part of the housing 2 is provided with a slot 13 communicating with the circular through hole 14. The inner core 3 is embedded in the circular through hole 14 of the shell 2, and the slot 13 on the shell 2 is filled with 353ND glue to fix the inner core 3 and the shell 2 as a whole, so as to prevent the inner core from expanding with heat and contracting with cold. The core 3 moves out of the circular through hole 14 of the housing 2 .

[0055] In order to facilitate the fixing of the double-clad fiber grating heat sink and the heat sink, the housing 2 on both sides of the circular through...

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Abstract

The invention belongs to the field of fiber lasers, and relates to a heat dissipation device for a double-clad fiber grating of a high-power fiber laser. Existing heat dissipation devices are complicated in structure, and the double-clad fiber grating is easy to break when working for a long time. The invention provides a heat dissipation device for a double-clad fiber grating of a high-power fiber laser, comprises a shell and a double-clad fiber grating arranged in the shell, and is characterized in that the heat dissipation device also includes an inner core, the double-clad fiber grating isembedded in the inner core, and the shell sleeves the inner core. The heat dissipation device of the invention adopts a nested structure, the inner core is made of silicon-aluminum alloy material with a low coefficient of expansion, and the shell is made of aluminum alloy or copper alloy material with high thermal conductivity, which can not only ensure the rapid dissipation of heat, but also hasa simple packaging structure and the double-clad fiber grating is not liable to break.

Description

technical field [0001] The invention belongs to the field of fiber lasers, in particular to heat dissipation of double-clad fiber gratings for fiber lasers, and specifically refers to a heat dissipation device for double-clad fiber gratings used in high-power fiber lasers. Background technique [0002] At present, high-power fiber lasers have begun to enter various industries. The development of high-power fiber lasers in cutting, welding, heat treatment, laser marking, laser engraving, laser medical equipment and instruments has huge market potential, even at the level of 100,000 watts. Fiber laser company IPG of the United States has entered the field of military weapons and equipment. [0003] With the development of high-power semiconductor laser pumping, double-clad fiber manufacturing technology and double-clad fiber grating manufacturing technology, the output power level of fiber lasers has increased rapidly, and the output of a single fiber has reached the level of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/042H01S3/04
CPCH01S3/0401H01S3/0405H01S3/042H01S3/0675
Inventor 李忠志韩植王彬
Owner 西安盛佳光电有限公司
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