WO2021092953A1

WO2021092953A1 - Optical fiber output head

Info

Publication number: WO2021092953A1
Application number: PCT/CN2019/118988
Authority: WO
Inventors: 马修泉; 张振海
Original assignee: 广东省智能机器人研究院
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2021-05-20

Abstract

An optical fiber output head, comprising: a lens barrel (20), an optical fiber sleeve (30) accommodated in the lens barrel (20), an optical fiber cooling assembly (40) connected to the lens barrel (20), and a collimation assembly (50) mounted in the lens barrel (20); wherein the optical fiber cooling assembly (40) comprises a liquid cooling sleeve (41) fitted over an outer side of the optical fiber sleeve (30); the optical fiber sleeve (30) is limited in the lens barrel (20) by means of the liquid cooling sleeve (41); the collimation assembly (50) comprises a collimation lens (51) provided in the lens barrel (20); the collimation lens (51) is provided corresponding to a light exiting port of the optical fiber sleeve (30). After an output optical fiber (801) penetrates through the optical fiber sleeve (30), the liquid cooling sleeve (41) and the optical fiber sleeve (30) limit the output optical fiber (801) in the lens barrel (20), and a light exiting end of the output optical fiber (801) corresponds to the collimation lens (51); after a laser beam having a divergence angle which is output by the output optical fiber (801) is collimated by the collimation lens (51), a parallel laser beam is emitted from a light exiting side of the lens barrel (20), so that an external collimating device can be omitted, and laser reflection or output power reduction caused by dust after the external collimating device is connected is avoided.

Description

Fiber output head

Technical field

The invention relates to optical fiber laser output technology, in particular to an optical fiber output head.

Background technique

The fiber output head of the existing fiber laser mainly has QBH, QD and other standards. After the output fiber is fixed to the output heads such as QBH, QD, etc., when the laser is emitted from QBH or QD, it has a divergence angle. It is necessary to install a collimating unit at the rear end of the output head before it can be used for laser cutting or laser welding; The straight unit and the output head are disconnected and connected. Therefore, dust can easily enter the space between the fiber output head and the collimating unit, which may cause laser reflection, damage the output head or laser generating device, or cause the effective output laser power to drop .

Summary of the invention

According to various embodiments of the present application, an optical fiber output head is provided.

An optical fiber output head, comprising: a lens barrel, an optical fiber sleeve housed in the lens barrel, an optical fiber cooling assembly connected to the lens barrel, and a collimating assembly installed in the lens barrel; the optical fiber cooling assembly includes A liquid-cooled sleeve sleeved on the outside of the optical fiber sleeve; the liquid-cooled sleeve confines the optical fiber sleeve in the lens barrel; the collimating assembly includes a collimating lens arranged in the lens barrel ; The collimating lens is arranged corresponding to the light exit of the optical fiber sleeve.

The beneficial effects of the optical fiber output head of the present invention: after the output fiber is inserted into the fiber sleeve, the liquid-cooled sleeve and the fiber sleeve confine the output fiber in the lens barrel, and the output end of the output fiber is aligned with the collimator. Corresponding to the lens. After the laser beam with divergence angle output by the output fiber is collimated by the collimating lens, the parallel laser beam is emitted from the light exit side of the lens barrel, so as to avoid external collimation devices and avoid connecting external collimation devices. Laser reflection or output power drop due to dust.

The details of one or more embodiments of the present invention are set forth in the following drawings and description. Other features, objects and advantages of the present invention will become apparent from the description, drawings and claims.

Description of the drawings

In order to better describe and explain the embodiments and/or examples of the inventions disclosed herein, one or more drawings may be referred to. The additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed inventions, the currently described embodiments and/or examples, and the best mode of these inventions currently understood.

Fig. 1 is a three-dimensional schematic diagram of an optical fiber output head according to an embodiment;

Figure 2 is a front view of the optical fiber output head shown in Figure 1;

Fig. 3 is a side view of the optical fiber output head shown in Fig. 2 in the AA direction;

Fig. 4A is an enlarged view of the optical fiber output head shown in Fig. 3 at the circle B;

Fig. 4B is an enlarged view of the optical fiber output head shown in Fig. 3 at the circle C;

Fig. 5 is an enlarged view of the optical fiber output head shown in Fig. 3 at the circle D;

Fig. 6 is an exploded schematic diagram of the optical fiber output head shown in Fig. 1;

Fig. 7 is a three-dimensional schematic diagram of the optical fiber ferrule in Fig. 6 after being separated from the liquid cooling sleeve, in which the lens barrel and the collimating cooling component are hidden;

Figure 8 is a three-dimensional schematic diagram of the collimating component and the protective component in Figure 6 after being separated from the lens barrel, in which the fiber tube and the fiber cooling component are hidden;

FIG. 9 is a three-dimensional schematic diagram of the lens barrel in FIG. 8.

The corresponding relationship between each component and the label in the drawings is:

Optical fiber output head 100;

The lens barrel 20, the outer liquid inlet 201, the first outer liquid outlet 202, the first positioning step 211, the collimated cooling channel 212, the direct flow section 213, the circulation section 214, the threaded area 221, the installation part 222, the first installation Hole 223, first screw hole 231, first annular groove 241, second annular groove 242, third annular groove 251, second screw hole 271, tapered inner cavity 281, second positioning step 291, seventh annular groove 292 ；

Fiber optic ferrule 30, fiber containing portion 31, containing column portion 32, and connecting barrel 33;

Optical fiber cooling assembly 40, liquid cooling sleeve 41, inner liquid inlet 411, inner liquid outlet 412, fourth annular groove 413, flange portion 414, third mounting hole 415, cylindrical groove 416, fifth annular groove 417 , The sixth annular groove 418, the fiber cooling channel 410, the third sealing ring 42, the fourth sealing ring 43, the fifth sealing ring 44, the sixth sealing ring 45, the sleeve locking ring 46, and the seventh sealing ring 47;

The collimating component 50, the collimating lens 51, the collimating locking ring 52, the first spacer 53, the second spacer 54;

The collimating cooling component 60, the outer tube 61, the second outer liquid outlet 611, the second mounting hole 612, the liquid cooling locking ring 62, the anti-slip pattern 621, the first sealing ring 63, and the second sealing ring 64;

Protective component 70, protective lens 71, protective lens locking ring 72, and eighth sealing ring 73;

Output fiber 801, quartz column 802.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be more fully described below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or a central element may also be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention.

Please refer to FIG. 1 to FIG. 9, an optical fiber output head 100 according to an embodiment is used for fixing optical fibers. The optical fiber output head 100 includes a lens barrel 20, an optical fiber sleeve 30 accommodated in the lens barrel 20, an optical fiber cooling assembly 40 connected to the lens barrel 20, and a collimating assembly 50 installed in the lens barrel 20; the optical fiber cooling assembly 40 includes A liquid-cooled sleeve 41 sleeved on the outside of the optical fiber sleeve 30; the liquid-cooled sleeve 41 confines the optical fiber sleeve 30 in the lens barrel 20; the collimating assembly 50 includes a collimating lens 51 arranged in the lens barrel 20; The straight lens 51 is arranged corresponding to the light exit of the optical fiber sleeve 30.

After the output optical fiber 801 is inserted into the optical fiber sleeve 30, the liquid-cooled sleeve 41 and the optical fiber sleeve 30 confine the output optical fiber 801 in the lens barrel 20, and the light output end of the output optical fiber 801 corresponds to the collimating lens 51, After the laser beam with a divergence angle output by the output fiber 801 is collimated by the collimating lens 51, the parallel laser beam is emitted from the light exit side of the lens barrel 20, thereby avoiding external collimation devices and avoiding access to external collimation devices. Laser reflection or output power drop due to dust.

3, the side of the lens barrel 20 is provided with an outer liquid inlet 201 that penetrates to the inner cavity; the side of the lens barrel 20 is also provided with a first outer liquid outlet 202 that penetrates to the inner cavity; the lens barrel 20 The inner side is provided with a first positioning step 211 corresponding to the collimating lens 51; the outer side of the lens barrel 20 is provided with a threaded area 221; the outer side of the lens barrel 20 is also extended with a mounting portion 222.

Please refer to FIG. 1, the mounting portion 222 of the lens barrel 20 is provided with a plurality of first mounting holes 223. This facilitates the installation and fixation of the optical fiber output head 100.

The lens barrel 20 defines a first screw hole 231 between the threaded area 221 and the mounting portion 222.

Referring to FIGS. 3 and 8, the outer side of the lens barrel 20 is provided with a first annular groove 241 and a second annular groove 242; the light entrance side of the lens barrel 20 is provided with a third annular groove 251.

Please refer to Figures 3 and 7, the fiber optic ferrule 30 includes a fiber-containing portion 31 inserted in the liquid-cooled sleeve 41, and a pole portion 32 connected to the fiber-containing portion 31; the fiber optic ferrule 30 also includes a fiber-receiving portion The connecting barrel 33 between the portion 31 and the receiving column portion 32; the outer side of the connecting barrel 33 is provided with an external thread.

Referring to FIGS. 3 and 9, the lens barrel 20 is provided with a tapered inner cavity 281 between the accommodating column portion 32 and the collimating lens 51.

4A and 5, the outer side of the liquid-cooled sleeve 41 is provided with an inner liquid inlet 411 that penetrates to its inner cavity, and the outer side of the liquid-cooled sleeve 41 is also provided with an inner liquid outlet 412 that penetrates to its inner cavity. The outer liquid inlet 201 and the inner liquid inlet 411 are correspondingly communicated, and the first outer liquid outlet 202 and the inner liquid outlet 412 are correspondingly communicated.

3, a gap is left between the inner wall of the liquid cooling sleeve 41 and the surface of the fiber containing portion 31, and the gap between the inner wall of the liquid cooling sleeve 41 and the surface of the fiber containing portion 31 forms an optical fiber cooling channel 410; specifically , The output optical fiber 801 is accommodated in the tubular fiber-containing portion 31, the quartz column 802 fused to the output optical fiber 801 is accommodated in the accommodating column portion 32, and the accommodating column portion 32 abuts against the outlet end of the liquid-cooled sleeve 41; The cooling liquid enters the fiber cooling channel 410 through the outer liquid inlet 201 and the inner liquid inlet 411 in sequence, and then flows out of the fiber cooling channel 410 from the inner liquid outlet 412 and the first outer liquid outlet 202; preferably, the cooling liquid In full contact with the surface of the fiber containing portion 31, the inner liquid inlet 411 and the inner liquid outlet 412 are arranged on the opposite sides of the liquid cooling sleeve 41, and the inner liquid inlet 411 and the inner liquid outlet 412 are respectively close to the liquid cooling jacket The two ends of the tube 41 are arranged to increase the stroke of the cooling liquid along the surface of the fiber containing portion 31 and fully absorb the heat on the output optical fiber 801 and the optical fiber sleeve 30. In other embodiments, a threaded groove may be provided on the surface of the liquid cooling sleeve 41 to guide the cooling liquid.

7 and 8, the outer side of the liquid cooling sleeve 41 is provided with a fourth annular groove 413; the fourth annular groove 413 is located between the inner liquid inlet 411 and the inner liquid outlet 412; the liquid cooling sleeve 41 extends There is a flange portion 414 corresponding to the light entrance side of the lens barrel 20; the third annular groove 251 corresponds to the flange portion 414; the optical fiber cooling assembly 40 also includes a third sealing ring 42 received in the third annular groove 251, And the fourth sealing ring 43 housed in the fourth annular groove 413; because the third sealing ring 42 and the fourth sealing ring 43 respectively abut between the liquid cooling sleeve 41 and the lens barrel 20, thereby avoiding the cooling liquid along The gap between the liquid cooling sleeve 41 and the lens barrel 20 leaks.

The flange portion 414 of the liquid-cooling sleeve 41 is provided with a number of third mounting holes 415; the lens barrel 20 is provided with a second screw hole 271 corresponding to the third mounting hole 415; the screws are sequentially inserted through the third mounting holes Between 415 and the second screw hole 271, when the third mounting hole 415 and the second screw hole 271 overlap, the outer liquid inlet 201 corresponds to the inner liquid inlet 411; thus, the liquid cooling sleeve 41 can be opposed to the lens barrel 20 Fixed.

Please refer to FIG. 5 and FIG. 7, the side of the liquid cooling sleeve 41 corresponding to the column portion 32 is provided with internal threads; the connecting barrel 33 is threadedly connected with the liquid cooling sleeve 41.

The optical fiber cooling assembly 40 also includes a fifth sealing ring 44 sleeved on the connecting barrel 33; the fifth sealing ring 44 is located between the liquid cooling sleeve 41 and the receiving column portion 32; thereby preventing the cooling liquid from flowing along the liquid cooling sleeve 41 and The gap between the container column portions 32 causes leakage.

4A and 6, the liquid cooling sleeve 41 is provided with a cylindrical groove 416 at one end where the laser enters; the liquid cooling sleeve 41 is provided with a fifth annular groove 417 on the inner side of the cylindrical groove 416; An internal thread is provided on the inner wall corresponding to the cylindrical groove 416; the liquid cooling sleeve 41 also includes a sixth sealing ring 45 housed in the fifth annular groove 417, and a sleeve lock housed in the cylindrical groove 416 The tight ring 46; the optical fiber ferrule 30 passes through the sleeve locking ring 46; the sixth sealing ring 45 abuts between the sleeve locking ring 46 and the liquid-cooled sleeve 41. Specifically, the fifth annular groove 417 is located close to the edge of the inner cavity of the liquid cooling sleeve 41. Under the pushing of the sleeve locking ring 46, the sixth sealing ring 45 blocks the space between the fiber containing portion 31 and the liquid cooling sleeve 41. So as to avoid the leakage of the coolant along the gap between the optical fiber ferrule 30 and the liquid-cooled ferrule 41.

Referring to FIG. 7, the outer side of the liquid cooling sleeve 41 is provided with a sixth annular groove 418; the sixth annular groove 418 is located between the end of the liquid cooling sleeve 41 facing the column portion 32 and the inner liquid outlet 412; the optical fiber cooling assembly 40 also includes a seventh sealing ring 47 accommodated in the sixth annular groove 418.

3 and 4B, the collimating lens 51 is disposed close to the first positioning step 211; the collimating assembly 50 also includes a collimating locking ring 52 threadedly connected to the inner side of the lens barrel 20; the collimating lens 51 is disposed in the first Position between the step portion 211 and the collimation locking ring 52.

The collimating assembly 50 further includes a first spacer 53 disposed between the collimating lens 51 and the first positioning step 211, and a second spacer 54 disposed between the collimating lens 51 and the collimation locking ring 52 . Thus, the friction received during the installation of the collimating lens 51 is reduced.

3 and 6, the optical fiber output head 100 further includes a collimation cooling assembly 60 connected to the lens barrel 20; the collimation cooling assembly 60 includes an outer sleeve 61 sleeved on the outside of the lens barrel 20; the outer sleeve 61 is provided with a first Two outer liquid outlets 611; a collimating cooling channel 212 is provided between the outer tube 61 and the lens barrel 20, and the collimating cooling channel 212 is located between the threaded area 221 and the mounting portion 222; the collimating cooling channel 212 includes a direct flow section 213, and the circulation section 214; the direct flow section 213 connects the first outer liquid outlet 202 and the beginning end of the circulation section 214; the second outer liquid outlet 611 communicates with the end of the circulation section 214 correspondingly; the circulation section 214 and the first positioning step 211 Corresponding; the cooling liquid flowing out from the inner liquid outlet 412 and the first outer liquid outlet 202 is connected to the circulation section 214 through the direct flow section 213 of the collimating cooling channel 212; the heat absorbed by the collimating lens 51 from the laser beam is transferred to After the lens barrel 20, the cooling liquid passing through the circulation section 214 of the collimating cooling channel 212 is taken away, thereby reducing the temperature of the collimating lens 51 and prolonging its service life.

The collimation cooling assembly 60 also includes a liquid-cooled locking ring 62 sleeved on the threaded area 221; the outer tube 61 is provided between the mounting portion 222 and the liquid-cooled locking ring 62; specifically, the liquid-cooled locking ring 62 is connected to the The lens barrel 20 is threadedly connected, thereby confining the outer tube 61 to a position corresponding to the collimating cooling channel 212.

An anti-slip pattern 621 is provided on the outer side of the liquid-cooled locking ring 62.

The outer sleeve 61 is provided with a second installation hole 612 corresponding to the first screw hole 231; specifically, when the second installation hole 612 overlaps the first screw hole 231, the second outer liquid outlet 611 on the outer sleeve 61 and The ends of the circulation section 214 are correspondingly overlapped, and the fixing members are sequentially inserted into the second mounting hole 612 and the first screw hole 231 to lock the angle and position of the outer tube 61 relative to the lens barrel 20.

Referring to FIG. 8, the collimating cooling channel 212 is located between the first annular groove 241 and the second annular groove 242; the collimating cooling assembly 60 further includes a first sealing ring 63 accommodated in the first annular groove 241, and The second sealing ring 64 in the second annular groove 242 is accommodated; since the first sealing ring 63 and the second sealing ring 64 respectively abut between the lens barrel 20 and the outer tube 61, thereby avoiding the cooling liquid along the outer tube 61 and The gap between the lens barrels 20 leaks out of the outer sleeve 61.

4B and FIG. 8, the optical fiber output head 100 further includes a protective assembly 70 connected to the lens barrel 20; the protective assembly 70 includes a protective lens 71 installed in the lens barrel 20; in the axial direction of the collimating lens 51, the protective lens 71 is located outside of the collimating lens 51.

The inner side of the lens barrel 20 is provided with a second positioning step 291 corresponding to the protective lens 71; the protective assembly 70 further includes a protective lens locking ring 72 threadedly connected to the inner side of the lens barrel 20; the protective lens 71 is at the second positioning step 291 and The protective lens is locked between the locking rings 72; thus, the protective lens 71 is limited in the lens barrel 20.

The lens barrel 20 is provided with a seventh annular groove 292 on the second positioning step 291; the seventh annular groove 292 faces the protective lens 71; the protective assembly 70 further includes an eighth sealing ring 73 accommodated in the seventh annular groove 292; The eighth sealing ring 73 fills the gap between the second positioning step 291 and the protective lens 71. This prevents external dust or liquid from entering the lens barrel 20 along the gap between the second positioning step 291 and the protective lens 71.

The above-mentioned embodiments only express several embodiments of the present invention, and the descriptions are relatively specific and detailed, but they should not be understood as limiting the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

An optical fiber output head, comprising a lens barrel, an optical fiber sleeve housed in the lens barrel, an optical fiber cooling assembly connected to the lens barrel, and a collimating assembly installed in the lens barrel; the optical fiber cooling assembly includes a sleeve A liquid-cooled sleeve arranged on the outside of the optical fiber sleeve; the liquid-cooled sleeve defines the optical fiber sleeve in the lens barrel; the collimating assembly includes a collimating lens arranged in the lens barrel; The collimating lens is arranged corresponding to the light exit of the optical fiber sleeve.
The optical fiber output head according to claim 1, wherein a through outer liquid inlet is provided on the side of the lens barrel; a through first outer liquid outlet is also provided on the side of the lens barrel; The optical fiber ferrule includes a fiber-containing part penetrating through the liquid-cooling sleeve, and a column-containing part connected to the fiber-containing part; the outer side of the liquid-cooling sleeve is provided with a penetrating inner liquid inlet, so The outer side of the liquid cooling sleeve is also provided with a through inner liquid outlet; the outer liquid inlet is correspondingly communicated with the inner liquid inlet, and the first outer liquid outlet is correspondingly communicated with the inner liquid outlet; A gap is left between the inner wall of the liquid cooling sleeve and the surface of the fiber containing portion, and the gap between the inner wall of the liquid cooling sleeve and the surface of the fiber containing portion forms an optical fiber cooling channel.
The optical fiber output head according to claim 2, further comprising a collimation cooling assembly connected to the lens barrel; the collimation cooling assembly includes an outer sleeve sleeved on the outside of the lens barrel; and the outer sleeve The tube is provided with a second outer liquid outlet; the inner side of the lens barrel is provided with a first positioning step corresponding to the collimating lens; the collimating lens is arranged close to the first positioning step; the outer sleeve A collimated cooling channel is provided between the lens barrel and the collimated cooling channel. The collimated cooling channel includes a direct flow section and a circulation section; the direct flow section communicates with the first outer liquid outlet and the starting end of the circulation section The second outer liquid outlet is correspondingly communicated with the end of the circulation section; the circulation section corresponds to the first positioning step.
The optical fiber output head according to claim 3, wherein the collimating assembly further comprises a collimating locking ring threadedly connected to the inner side of the lens barrel; the collimating lens is arranged on the first positioning step Between the part and the collimating locking ring.
The optical fiber output head according to claim 4, wherein the collimating assembly further comprises a first spacer arranged between the collimating lens and the first positioning step, and a first spacer arranged on the The second spacer between the collimating lens and the collimating locking ring.
The optical fiber output head according to claim 3, characterized in that: the outer side of the lens barrel is provided with a threaded area; the outer side of the lens barrel is also extended with a mounting part; the collimated cooling channel is located in the threaded area and Between the mounting parts; the collimating cooling assembly further includes a liquid-cooled locking ring sleeved on the threaded area; the outer tube is arranged between the mounting portion and the liquid-cooling locking ring .
The optical fiber output head according to claim 6, wherein the outer side of the liquid-cooled locking ring is provided with anti-skid patterns.
7. The optical fiber output head according to claim 6, wherein a plurality of first mounting holes are provided on the mounting portion of the lens barrel.
The optical fiber output head according to claim 6, wherein the lens barrel is provided with a first screw hole between the threaded area and the mounting portion; and the outer tube is provided with a first screw hole. The second mounting hole corresponding to the screw hole.
The optical fiber output head according to claim 3, wherein: the outer side of the lens barrel is provided with a first annular groove and a second annular groove; the collimated cooling channel is located between the first annular groove and the second annular groove. Between two annular grooves; the collimating cooling assembly further includes a first sealing ring accommodated in the first annular groove, and a second sealing ring accommodated in the second annular groove.
The optical fiber output head according to claim 2, characterized in that: the light entrance side of the lens barrel is provided with a third annular groove; the outer side of the liquid cooling sleeve is provided with a fourth annular groove; the fourth annular groove The groove is located between the inner liquid inlet and the inner liquid outlet; the liquid cooling sleeve extends with a flange portion corresponding to the light inlet side of the lens barrel; the third annular groove is connected to the The flange portion corresponds; the optical fiber cooling assembly further includes a third sealing ring accommodated in the third annular groove, and a fourth sealing ring accommodated in the fourth annular groove.
The optical fiber output head according to claim 11, wherein the flange portion of the liquid cooling sleeve is provided with a plurality of third mounting holes; and the lens barrel is provided with a plurality of third mounting holes corresponding to the third mounting holes. The second screw hole.
The optical fiber output head according to claim 2, wherein the optical fiber ferrule further comprises a connecting barrel arranged between the fiber containing portion and the receiving column portion; an outer side is provided on the outer side of the connecting barrel. Thread; the liquid-cooling sleeve and the side corresponding to the column portion are provided with internal threads; the connecting barrel is threadedly connected with the liquid-cooling sleeve.
The optical fiber output head according to claim 13, wherein the optical fiber cooling assembly further comprises a fifth sealing ring sleeved on the connecting barrel; the fifth sealing ring is located between the liquid cooling sleeve and the Between the said container column part.
The optical fiber output head according to claim 13, wherein the liquid-cooled sleeve is provided with a cylindrical groove at one end where the laser enters; and the liquid-cooled sleeve is provided with a fifth ring on the inner side of the cylindrical groove. Groove; the liquid-cooled sleeve is provided with internal threads on the inner wall corresponding to the cylindrical groove; the liquid-cooled sleeve further includes a sixth sealing ring accommodated in the fifth annular groove, and the container The sleeve locking ring is placed in the cylindrical groove; the optical fiber sleeve is inserted in the sleeve locking ring; the sixth sealing ring abuts against the sleeve locking ring and the sleeve Between the liquid-cooled casing.
The optical fiber output head according to claim 2, wherein the lens barrel is provided with a tapered cavity between the receiving column portion and the collimating lens.
The optical fiber output head according to claim 2, wherein a sixth annular groove is provided on the outer side of the liquid-cooled sleeve; the sixth annular groove is located in the direction of the liquid-cooled sleeve toward the container column. Between one end and the inner liquid outlet; the optical fiber cooling assembly further includes a seventh sealing ring accommodated in the sixth annular groove.
The optical fiber output head according to claim 1, further comprising a protective assembly connected to the lens barrel; the protective assembly includes a protective lens installed in the lens barrel.
The optical fiber output head according to claim 18, wherein: the inner side of the lens barrel is provided with a second positioning step corresponding to the protective lens; the protective assembly further comprises a threaded connection with the inner side of the lens barrel Protective lens locking ring; the protective lens is located between the second positioning step and the protective lens locking ring.
The optical fiber output head according to claim 19, wherein the lens barrel is provided with a seventh annular groove on the second positioning step portion; the seventh annular groove faces the protective lens; and the protective assembly is further It includes an eighth sealing ring accommodated in the seventh annular groove.