CN213212647U - Optical fiber grating heat radiator - Google Patents

Abstract

The utility model relates to a fiber grating heat abstractor, include: the optical fiber grating comprises an upper base, a lower base, a double-cladding optical fiber grating and graphene sheets, wherein the upper base and the lower base are suitable for matching, the double-cladding optical fiber grating is arranged between the upper base and the lower base, and the graphene sheets are respectively arranged between the double-cladding optical fiber grating and the upper base and between the double-cladding optical fiber grating and the lower base. The utility model discloses can satisfy the thermal effluvium of double-clad fiber grating under the long-time high temperature condition of high power fiber laser to improve the stability of double-clad fiber grating work.

Description

Optical fiber grating heat radiator

Technical Field

The utility model relates to a fiber laser technical field particularly, relates to a fiber grating heat abstractor.

Background

At present, high-power fiber lasers have begun to enter various industrial fields, and the development of the high-power fiber lasers in the aspects of cutting, welding, heat treatment, laser marking, laser engraving, laser medical equipment and instruments and the like has great market potential. With the rapid increase of the output power level of the optical fiber laser, the output power of a single optical fiber reaches the level of ten-thousand watts, and the optical fiber laser is widely applied to the fields of high-precision laser processing, laser medical treatment, optical communication, national defense and the like.

The fiber grating is one of the key technologies of the high-power fiber laser, and a pair of fiber gratings with high reflectivity and low reflectivity respectively are usually adopted as the resonant cavity of the high-power fiber laser, wherein the fiber grating with high reflectivity is used as the reflection end, and has very high heat loss. For high power fiber lasers, there is typically a 15% energy loss, which translates into heat damage to the double-clad fiber grating. Under the normal working condition, the double-cladding fiber grating can continuously work for a long time only when the temperature is below 85 ℃, so that the improvement and the promotion of the heat dissipation package of the high-power double-cladding fiber grating are needed. The packaging device of double-clad fiber grating under the general condition is to encapsulate the bare fiber of double-clad fiber grating in a metal base, and there is better packaging adhesive of heat conduction heat dissipation nature in the metal base, and this kind of packaging adhesive needs the solidification, and the stability of the solidification effect of here packaging adhesive also can directly influence the stability of heat dissipation performance.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fiber grating heat abstractor to solve and satisfy high power fiber laser double-clad fiber grating thermal effluvium under the long-time high temperature condition, improve the technical problem of double-clad fiber grating job stabilization nature.

The utility model discloses a fiber grating heat abstractor realizes like this:

a fiber grating heat sink comprising: the optical fiber grating comprises an upper base, a lower base, a double-cladding optical fiber grating and graphene sheets, wherein the upper base and the lower base are suitable for matching, the double-cladding optical fiber grating is arranged between the upper base and the lower base, and the graphene sheets are respectively arranged between the double-cladding optical fiber grating and the upper base as well as between the double-cladding optical fiber grating and the lower base.

In a preferred embodiment of the present invention, at least one of the facing end surfaces of the upper and lower bases has a fiber groove adapted to be embedded with the double-clad fiber grating.

In the preferred embodiment of the present invention, the facing end surfaces of the upper base and the lower base are respectively provided with an optical fiber groove suitable for embedding the double-clad fiber grating, and the optical fiber grooves on the upper base and the lower base are oppositely arranged.

In an alternative embodiment of the present invention, the cross-section of the optical fiber groove is arc-shaped.

In an alternative embodiment of the present invention, the cross-section of the optical fiber groove is rectangular.

In a preferred embodiment of the present invention, the upper base and the lower base are made of an alloy with a low expansion coefficient.

In a preferred embodiment of the present invention, the graphene sheet has a sheet structure; and

the graphene sheet is suitable for being attached to the upper base and the end face of the upper base, which faces oppositely.

In a preferred embodiment of the present invention, the upper base and the lower base are connected by screws.

Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has: the utility model discloses a fiber grating heat abstractor, through the graphite alkene piece that is equipped with respectively between double-clad fiber grating and upper base and lower base, the graphite alkene piece has higher heat conductivity, can produce a large amount of heats to double-clad fiber grating during operation and carry out the high efficiency conduction. Just the utility model discloses a graphite alkene piece compares the heat conduction silica gel among the prior art, is not only do benefit to the assembly, moreover at the in-process of processing, can save the curing time of heat conduction silica gel, and can not receive the influence of heat conduction silica gel curing effect, can effectively improve the stability of user state.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic view illustrating an overall structure of a fiber grating heat dissipation device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an optical fiber groove of an optical fiber grating heat dissipation device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an optical fiber groove of another embodiment of a fiber grating heat dissipation device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an optical fiber groove of a fiber grating heat dissipation device according to another embodiment of the present invention;

fig. 5 shows a schematic structural diagram of a fiber grating heat dissipation device according to an embodiment of the present invention in a state where a graphene sheet is matched with a double-clad fiber grating;

fig. 6 shows a schematic structural diagram of a lower base of a fiber grating heat dissipation device according to an embodiment of the present invention.

In the figure: the device comprises an upper base 1, a lower base 2, a double-clad fiber grating 3, a graphene sheet 5, a screw 6 and a fiber groove 7.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

Referring to fig. 1 to 6, the present embodiment provides a fiber grating heat dissipation device, including: the optical fiber grating device comprises an upper base 1, a lower base 2, a double-clad optical fiber grating 3 and graphene sheets 5, wherein the upper base 1 and the lower base 2 are suitable for matching, the double-clad optical fiber grating 3 is arranged between the upper base 1 and the lower base 2, and the graphene sheets 5 are respectively arranged between the double-clad optical fiber grating and the upper base 1 and the lower base 2. That is to say, the double-clad fiber grating 3 enclosed between the upper base 1 and the lower base 2 is wrapped by the graphene sheets 5 respectively located on the upper side and the lower side of the double-clad fiber grating 3, so that the graphene sheets 5 can efficiently conduct heat generated during the use of the double-clad fiber grating 3.

In the present embodiment, the upper base 1 and the lower base 2 are connected by the screw 6, and the screw 6 penetrates through the graphene sheet 5 at the same time, so as to press the graphene sheet 5 between the upper base 1 and the lower base 2.

In addition, the graphene sheet 5 of the present embodiment has a sheet structure; and the graphene sheet 5 is adapted to be attached to the upper base 1 and the end face of the upper base 1 facing each other. When the upper base 1 and the lower base 2 are fastened and matched through the screw 6, the graphene sheet 5 with a thin sheet structure is tightly pressed and wrapped on the outer side surface of the double-clad fiber grating 3.

In consideration of the stability and firmness of the fit between the double-clad fiber grating 3 and the upper and lower bases 1 and 2, the present embodiment is provided with a fiber groove 7 adapted to be embedded in the double-clad fiber grating 3 on at least one of the facing end surfaces of the upper and lower bases 1 and 2.

In an alternative embodiment, only one of the upper base 1 and the lower base 2 is provided with the fiber groove 7, but in an alternative embodiment, the fiber grooves 7 suitable for embedding the double-clad fiber grating 3 are respectively provided on the opposite facing end surfaces of the upper base 1 and the lower base 2, and the fiber grooves 7 respectively located on the upper base 1 and the lower base 2 are oppositely arranged. This embodiment is not absolutely limited.

For the optical fiber groove 7 of this embodiment, the cross section of the optical fiber groove 7 may be an arc shape or a rectangular shape, and of course, other shapes are also possible, which is not limited in this embodiment.

It should be noted that, the groove size of the optical fiber groove 7 in the present embodiment is the outer diameter of the double-clad fiber grating 3, so that even when the double-clad fiber grating 3 is wrapped between the graphene sheets 5 located at the upper and lower layers of the double-clad fiber grating 3, a fit gap still exists between the optical fiber groove 7 and the double-clad fiber grating 3, that is, the double-clad fiber grating 3 does not fill the optical fiber groove 7, so that the fit gap existing between the optical fiber groove 7 and the double-clad fiber grating 3 can form a space beneficial to the dissipation of the heat generated by the double-clad fiber grating 3, and thus, in combination with the graphene sheets 5, the space serves as a multiple path for the dissipation of the heat generated by the double-clad fiber grating 3.

In addition, the upper base 1 and the lower base 2 of the present embodiment are made of an alloy with a low expansion coefficient, and may be made of an aluminum alloy material or a copper alloy material. If the graphene sheet 5 wrapping the double-clad fiber grating 3 has good heat conducting property, the heat of the double-clad fiber grating 3 can be rapidly dissipated; the upper base 1 and the lower base 2 are made of alloy with low expansion coefficient, so that the upper base 1 and the lower base 2 can not generate large pulling force on the double-cladding fiber grating 3, the double-cladding fiber grating 3 is not easy to break when working at high temperature, and the stable work of the double-cladding fiber grating 3 is ensured.

The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Claims (8)

1. A fiber grating heat sink, comprising: the optical fiber grating comprises an upper base, a lower base, a double-cladding optical fiber grating and graphene sheets, wherein the upper base and the lower base are suitable for matching, the double-cladding optical fiber grating is arranged between the upper base and the lower base, and the graphene sheets are respectively arranged between the double-cladding optical fiber grating and the upper base as well as between the double-cladding optical fiber grating and the lower base.

2. The fiber grating heat sink according to claim 1, wherein at least one of the facing end surfaces of the upper and lower bases has a fiber groove adapted to receive a double-clad fiber grating.

3. The fiber grating heat sink according to claim 2, wherein the opposing end surfaces of the upper and lower bases are respectively provided with fiber grooves adapted to embed the double-clad fiber grating, and the fiber grooves on the upper and lower bases are oppositely disposed.

4. The fiber grating heat sink according to any one of claims 2 or 3, wherein the cross-section of the fiber groove is arc-shaped.

5. The fiber grating heat sink according to any one of claims 2 or 3, wherein the fiber grooves have a rectangular cross-section.

6. The fiber grating heat sink according to claim 1, wherein the upper and lower bases are made of an alloy with a low coefficient of expansion.

7. The fiber grating heat sink according to claim 1, wherein the graphene sheet has a sheet structure; and

the graphene sheet is suitable for being attached to the upper base and the end face of the upper base, which faces oppositely.

8. The fiber grating heat sink according to claim 1, wherein the upper base and the lower base are connected by screws.

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