CN211017729U - Optical fiber output head with collimation function - Google Patents

Abstract

An optical fiber output head with collimation function, comprising: the optical fiber cooling device comprises a lens barrel, an optical fiber sleeve accommodated in the lens barrel, an optical fiber cooling assembly connected with the lens barrel, and a collimation assembly installed in the lens barrel; the optical fiber cooling assembly comprises a liquid cooling sleeve sleeved outside the optical fiber sleeve; the liquid cooling sleeve limits the optical fiber sleeve in the lens barrel; the collimating assembly comprises a collimating lens arranged in the lens barrel; the collimating lens is arranged corresponding to the light outlet of the optical fiber sleeve. After the output optical fiber is arranged in the optical fiber sleeve in a penetrating mode, the output optical fiber is limited in the lens barrel through the liquid cooling sleeve and the optical fiber sleeve, the light outlet end of the output optical fiber corresponds to the collimating lens, and after the laser beam with the divergence angle output by the output optical fiber is collimated by the collimating lens, the parallel laser beam is emitted from the light outlet side of the lens barrel, 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

Optical fiber output head with collimation function

Technical Field

The utility model relates to an optic fibre laser output technique especially relates to an optic fibre delivery outlet of area collimation function.

Background

The fiber output head with collimation function of the existing fiber laser mainly has standards of QBH, QD and the like. After the output optical fiber is fixed in output heads such as QBH and QD, when laser is emitted from QBH or QD, a divergence angle is formed, and the output optical fiber can be used for laser cutting or laser welding after a collimation unit is installed at the rear end of the output heads; because the collimation unit is detachably connected with the output head, dust is easy to enter a space between the optical fiber output head with the collimation function and the collimation unit, laser reflection can be caused, the output head or a laser generating device is damaged, or the power of the laser which is effectively output is reduced.

SUMMERY OF THE UTILITY MODEL

Therefore, the optical fiber output head with the collimation function is needed to be provided for solving the problem that the output head can output the collimation processing laser after an external butt-joint collimation unit is needed.

An optical fiber output head with collimation function, comprising: the optical fiber cooling device comprises a lens barrel, an optical fiber sleeve accommodated in the lens barrel, an optical fiber cooling assembly connected with the lens barrel, and a collimation assembly installed in the lens barrel; the optical fiber cooling assembly comprises a liquid cooling sleeve sleeved outside the optical fiber sleeve; the liquid cooling sleeve limits the optical fiber sleeve in the lens barrel; the collimating assembly comprises a collimating lens arranged in the lens barrel; the collimating lens is arranged corresponding to the light outlet of the optical fiber sleeve.

According to the optical fiber output head with the collimation function, after the output optical fiber is arranged in the optical fiber sleeve in a penetrating mode, the output optical fiber is limited in the lens cone through the liquid cooling sleeve and the optical fiber sleeve, the light outlet end of the output optical fiber corresponds to the collimation lens, the laser beam with the divergence angle output by the output optical fiber is collimated through the collimation lens, and then the parallel laser beam is emitted from the light outlet side of the lens cone, so that an external collimation device can be omitted, and laser reflection or output power reduction caused by dust after the external collimation device is connected is avoided.

In one embodiment, a through external liquid inlet is arranged on the side surface of the lens barrel; a first through liquid outlet is also formed in the side surface of the lens barrel; the optical fiber sleeve comprises a fiber accommodating part which is arranged in the liquid cooling sleeve in a penetrating way and a column accommodating part which is connected with the fiber accommodating part; a through inner liquid inlet is formed in the outer side of the liquid cooling sleeve, and a through inner liquid outlet is also formed in the outer side of the liquid cooling sleeve; 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 reserved between the inner wall of the liquid cooling sleeve and the surface of the fiber accommodating part, and an optical fiber cooling flow channel is formed by the gap between the inner wall of the liquid cooling sleeve and the surface of the fiber accommodating part; and the sufficient cooling of the optical fiber sleeve is realized.

In one embodiment, the device further comprises a collimation cooling assembly connected with the lens barrel; the collimating cooling component comprises an outer sleeve sleeved outside the lens cone; a second outer liquid outlet is formed in the outer sleeve; a first positioning step part corresponding to the collimating lens is arranged on the inner side of the lens barrel; the collimating lens is arranged close to the first positioning step part; a collimation cooling flow passage is arranged between the outer sleeve and the lens cone and comprises a direct current section and a circulating current section; the direct-current section is communicated with the first liquid outlet and the starting end of the circulation section; the second outer liquid outlet is correspondingly communicated with the tail end of the circulation section; the circulation section corresponds to the first positioning step part; thereby reducing the temperature of the collimating lens and prolonging the service life of the collimating lens.

In one embodiment, the alignment assembly further comprises an alignment locking ring in threaded connection with the inside of the lens barrel; the collimating lens is arranged between the first positioning step part and the collimating locking ring; so that the collimating lens can be confined in the barrel.

In one embodiment, the outer side of the lens barrel is provided with a threaded area; a mounting part extends from the outer side of the lens barrel; the collimating cooling channel is between the threaded region and the mounting portion; the collimation cooling assembly further comprises a liquid cooling locking ring sleeved on the threaded area; the outer sleeve is arranged between the mounting part and the liquid cooling locking ring; thereby confining the outer sleeve to a position corresponding to the collimated cooling flow path.

In one embodiment, a third annular groove is arranged on the light inlet side of the lens barrel; a fourth annular groove is formed in the outer side of the liquid cooling sleeve; the fourth annular groove is positioned between the inner liquid inlet and the inner liquid outlet; a flange part corresponding to the light inlet side of the lens barrel extends from the liquid cooling sleeve; the third annular groove corresponds to the flange part; the optical fiber cooling assembly further comprises a third sealing ring accommodated in the third annular groove and a fourth sealing ring accommodated in the fourth annular groove; thereby avoiding the cooling liquid from leaking along the clearance between the liquid cooling sleeve and the lens cone.

In one embodiment, the fiber optic ferrule further comprises a connector barrel disposed between the fiber receiving portion and the post portion; the outer side of the connecting cylinder is provided with an external thread; an internal thread is arranged on one side of the liquid cooling sleeve corresponding to the column accommodating part; the connecting cylinder is in threaded connection with the liquid-cooled sleeve; therefore, the fixation between the optical fiber sleeve and the liquid cooling sleeve can be realized.

In one embodiment, the lens barrel is provided with a conical inner cavity between the column containing part and the collimating lens; thereby preventing the divergent laser beam from contacting the inner wall of the lens barrel.

In one embodiment, a sixth annular groove is formed in the outer side of the liquid cooling sleeve; the sixth annular groove is positioned between one end of the liquid cooling sleeve facing the column containing part and the inner liquid outlet; the optical fiber cooling assembly further comprises a seventh sealing ring received in the sixth annular groove; thereby avoiding the cooling liquid leaked from the inner liquid outlet from entering the inner side of the collimating lens from the clearance between the lens barrel and the liquid cooling sleeve.

In one embodiment, the lens barrel further comprises a protective component connected with the lens barrel; the protective assembly comprises a protective lens mounted in the lens barrel; a second positioning step part corresponding to the protective lens is arranged on the inner side of the lens barrel; the protective assembly also comprises a protective lens locking ring in threaded connection with the inner side of the lens cone; the protective lens is positioned between the second positioning step part and the protective lens locking ring; a seventh annular groove is formed in the second positioning step part of the lens barrel; the seventh annular groove faces the protective lens; the guard assembly further comprises an eighth seal ring received in the seventh annular groove; thereby preventing the collimating lens from coming into direct contact with external dust.

Drawings

FIG. 1 is a schematic perspective view of an optical fiber output head with collimation function according to an embodiment;

FIG. 2 is a front view of the fiber output head with collimation shown in FIG. 1;

FIG. 3 is a side view in the direction AA of the fiber output head with collimation shown in FIG. 2;

FIG. 4A is an enlarged view of the fiber output head with collimation shown in FIG. 3 at circle B;

FIG. 4B is an enlarged view of the fiber output head with collimation shown in FIG. 3 at circle C;

FIG. 5 is an enlarged view of the fiber output head with collimation shown in FIG. 3 at circle D;

FIG. 6 is an exploded view of the fiber output head of FIG. 1 with alignment;

FIG. 7 is a perspective view of the optical fiber ferrule of FIG. 6 after being separated from the liquid-cooled ferrule, with the lens barrel and the collimating cooling assembly hidden;

FIG. 8 is a perspective view of the collimating assembly and the shielding assembly of FIG. 6 shown separated from the lens barrel with the fiber ferrule and the fiber cooling assembly hidden;

fig. 9 is a perspective view of the lens barrel in fig. 8.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully below. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 to 9, an embodiment of an optical fiber output head 100 with a collimating function is used for fixing an optical fiber. The optical fiber output head 100 with the collimation function comprises a lens barrel 20, an optical fiber sleeve 30 accommodated in the lens barrel 20, an optical fiber cooling assembly 40 connected with the lens barrel 20, and a collimation assembly 50 installed in the lens barrel 20; the optical fiber cooling assembly 40 comprises a liquid cooling sleeve 41 sleeved outside the optical fiber sleeve 30; the liquid-cooled ferrule 41 confines the fiber ferrule 30 within the lens barrel 20; the collimating assembly 50 includes a collimating lens 51 disposed in the lens barrel 20; the collimating lens 51 is disposed corresponding to the light exit of the optical fiber ferrule 30.

After the output optical fiber 801 is inserted into 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 the light-emitting end of the output optical fiber 801 corresponds to the collimating lens 51, and after the laser beam with the divergence angle output by the output optical fiber 801 is collimated by the collimating lens 51, the parallel laser beam is emitted from the light-emitting 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.

Referring to fig. 3, an external liquid inlet 201 penetrating to an inner cavity of the lens barrel 20 is disposed on a side surface of the lens barrel; a first liquid outlet 202 penetrating to the inner cavity of the lens barrel 20 is further formed in the side surface of the lens barrel; a first positioning step part 211 corresponding to the collimating lens 51 is arranged on the inner side of the lens barrel 20; the outer side of the lens barrel 20 is provided with a threaded area 221; a mounting portion 222 also extends outside the lens barrel 20.

Referring to fig. 1, the mounting portion 222 of the lens barrel 20 is provided with a plurality of first mounting holes 223. Thereby facilitating the installation and fixation of the optical fiber output head 100 with the collimation function.

The lens barrel 20 is provided with a first screw hole 231 between the threaded region 221 and the mounting portion 222.

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

Referring to fig. 3 and 7, the optical fiber ferrule 30 includes a fiber accommodating portion 31 penetrating through the liquid-cooled ferrule 41, and a column portion 32 connected to the fiber accommodating portion 31; the optical fiber ferrule 30 further includes a connecting tube 33 provided between the fiber containing portion 31 and the column portion 32; the outside of the connecting cylinder 33 is provided with an external thread.

Referring to fig. 3 and 9, the lens barrel 20 has a tapered inner cavity 281 between the column part 32 and the collimating lens 51.

Referring to fig. 4A and 5, an inner liquid inlet 411 penetrating through the liquid cooling sleeve 41 to the inner cavity thereof is disposed at the outer side of the liquid cooling sleeve 41, and an inner liquid outlet 412 penetrating through the inner cavity thereof is further disposed at the outer side of the liquid cooling sleeve 41; the external liquid inlet 201 is correspondingly communicated with the internal liquid inlet 411, and the first external liquid outlet 202 is correspondingly communicated with the internal liquid outlet 412.

Referring to fig. 3, a gap is left between the inner wall of the liquid cooling sleeve 41 and the surface of the fiber accommodating portion 31, and the gap between the inner wall of the liquid cooling sleeve 41 and the surface of the fiber accommodating portion 31 forms an optical fiber cooling channel 410; specifically, the output optical fiber 801 is accommodated in the tubular fiber accommodating portion 31, the quartz column 802 welded to the output optical fiber 801 is accommodated in the column accommodating portion 32, and the column accommodating portion 32 abuts against the outlet end of the liquid cooling sleeve 41; the external cooling liquid sequentially enters the optical fiber cooling flow channel 410 through the external liquid inlet 201 and the internal liquid inlet 411, and then flows out of the optical fiber cooling flow channel 410 from the internal liquid outlet 412 and the first external liquid outlet 202; preferably, in order to make the cooling liquid fully contact with the surface of the fiber accommodating portion 31, the inner liquid inlet 411 and the inner liquid outlet 412 are disposed on two opposite sides of the liquid cooling sleeve 41, and the inner liquid inlet 411 and the inner liquid outlet 412 are disposed near two ends of the liquid cooling sleeve 41, respectively, so as to increase the stroke of the cooling liquid along the surface of the fiber accommodating 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 formed on the surface of the liquid-cooled sleeve 41 to guide the cooling liquid.

Referring to fig. 7 and 8, a fourth annular groove 413 is formed on the outer side of the liquid cooling sleeve 41; a fourth annular groove 413 is positioned between the inner liquid inlet 411 and the inner liquid outlet 412; a flange part 414 corresponding to the light inlet side of the lens barrel 20 extends from the liquid cooling sleeve 41; the third annular groove 251 corresponds to the flange portion 414; the optical fiber cooling assembly 40 further comprises a third sealing ring 42 received in the third annular groove 251, and a fourth sealing ring 43 received in the fourth annular groove 413; since the third seal ring 42 and the fourth seal ring 43 are respectively abutted between the liquid cooling sleeve 41 and the lens barrel 20, the cooling liquid is prevented from leaking along the gap between the liquid cooling sleeve 41 and the lens barrel 20.

The flange part 414 of the liquid cooling sleeve 41 is provided with a plurality 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 screw members are sequentially arranged between the third mounting hole 415 and the second screw hole 271 in a penetrating manner, and when the third mounting hole 415 is overlapped with the second screw hole 271, the outer liquid inlet 201 corresponds to the inner liquid inlet 411; thereby, the fixation of the liquid cooling jacket 41 with respect to the lens barrel 20 can be achieved.

Referring to fig. 5 and 7, an internal thread is formed on the liquid-cooling sleeve 41 at a side corresponding to the column portion 32; the connecting tube 33 is screwed to the liquid cooling jacket 41.

The optical fiber cooling assembly 40 further includes a fifth sealing ring 44 disposed on the connecting cylinder 33; a fifth seal ring 44 is provided between the liquid-cooling sleeve 41 and the column portion 32; thereby preventing the coolant from leaking along the gap between the liquid cooling jacket 41 and the column portion 32.

Referring to fig. 4A and fig. 6, a cylindrical groove 416 is formed at the laser-entering end of the liquid-cooling sleeve 41; the liquid cooling sleeve 41 is provided with a fifth annular groove 417 at the inner side of the cylindrical groove 416; the inner wall of the liquid cooling sleeve 41 corresponding to the cylindrical groove 416 is provided with an internal thread; the liquid cooling bushing 41 further includes a sixth sealing ring 45 received in the fifth annular groove 417, and a bushing locking ring 46 received in the cylindrical groove 416; the fiber ferrule 30 is inserted into the ferrule lock 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 disposed near the inner cavity edge of the liquid cooling sleeve 41, and under the pushing of the sleeve locking ring 46, the sixth sealing ring 45 blocks the gap between the fiber accommodating portion 31 and the liquid cooling sleeve 41; thereby preventing the cooling liquid from leaking along the gap between the optical fiber ferrule 30 and the liquid-cooled ferrule 41.

Referring to fig. 7, a sixth annular groove 418 is formed at the outer side of the liquid-cooling sleeve 41; the sixth annular groove 418 is located between the end of the liquid-cooling jacket 41 facing the column portion 32 and the inner liquid outlet 412; the fiber cooling assembly 40 also includes a seventh sealing ring 47 received in the sixth annular groove 418.

Referring to fig. 3 and 4B, the collimating lens 51 is disposed near the first positioning step 211; the alignment assembly 50 further includes an alignment locking ring 52 threadedly coupled to the inside of the lens barrel 20; the collimating lens 51 is disposed between the first positioning step portion 211 and the collimating 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 collimating locking ring 52. Thereby reducing the friction experienced during installation of the collimating lens 51.

Referring to fig. 3 and 6, the optical fiber output head 100 with collimation function further includes a collimation cooling assembly 60 connected to the lens barrel 20; the collimation cooling assembly 60 comprises an outer sleeve 61 sleeved outside the lens cone 20; the outer sleeve 61 is provided with a second outer liquid outlet 611; a collimation cooling flow channel 212 is arranged between the outer sleeve 61 and the lens barrel 20, and the collimation cooling flow channel 212 is positioned between the threaded area 221 and the mounting part 222; the collimating cooling channel 212 includes a direct flow section 213 and a circular flow section 214; the direct-current section 213 communicates the first liquid outlet 202 with the start end of the circular-current section 214; the second outer liquid outlet 611 is correspondingly communicated with the tail end of the circulation section 214; the circulation section 214 corresponds to the first positioning step portion 211; the cooling liquid flowing out from the inner liquid outlet 412 and the first outer liquid outlet 202 is communicated to the circulation section 214 through the direct-flow section 213 of the collimating cooling flow channel 212; after the heat absorbed by the collimating lens 51 from the laser beam is transferred to the lens barrel 20, the heat is carried away by the cooling liquid passing through the circulation section 214 of the collimating cooling channel 212, so that the temperature of the collimating lens 51 can be reduced, and the service life of the collimating lens is prolonged.

The collimating cooling assembly 60 further comprises a liquid cooling locking ring 62 sleeved on the threaded region 221; the outer sleeve 61 is disposed between the mounting portion 222 and the liquid cooling locking ring 62; specifically, the liquid cooled locking ring 62 is threadably connected to the barrel 20, thereby defining the outer sleeve 61 to a position corresponding to the collimated cooling flow path 212.

The outside of the liquid cooling locking ring 62 is provided with anti-slip threads 621.

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

Referring to FIG. 8, the collimating cooling channel 212 is disposed between the first annular groove 241 and the second annular groove 242; the collimating cooling assembly 60 further comprises a first seal ring 63 received in the first annular groove 241, and a second seal ring 64 received in the second annular groove 242; since the first seal ring 63 and the second seal ring 64 are respectively abutted between the lens barrel 20 and the outer sleeve 61, the coolant is prevented from leaking out of the outer sleeve 61 along the gap between the outer sleeve 61 and the lens barrel 20.

Referring to fig. 4B and fig. 8, the optical fiber output head 100 with collimation function further includes a protection component 70 connected to the lens barrel 20; the protective assembly 70 includes a protective lens 71 mounted in the lens barrel 20; in the axial direction of the collimator lens 51, the protective lens 71 is located outside the collimator lens 51.

A second positioning step portion 291 corresponding to the protection lens 71 is provided inside the lens barrel 20; the protective assembly 70 further includes a protective lens locking ring 72 threadedly coupled to the inside of the lens barrel 20; the protective lens 71 is between the second positioning step 291 and the protective lens locking ring 72; thereby confining the protective lens 71 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 guard assembly 70 further includes an eighth seal ring 73 received in the seventh annular groove 292; the eighth seal ring 73 fills the gap between the second positioning step 291 and the protective lens 71. Thereby preventing external dust or liquid from entering the inside of the lens barrel 20 along the gap between the second positioning step 291 and the protective lens 71.

In this embodiment, after the output optical fiber is inserted into the optical fiber sleeve, the liquid cooling sleeve and the optical fiber sleeve limit the output optical fiber in the lens barrel assembly, and the light-emitting end of the output optical fiber corresponds to the collimating lens, and after the laser beam with the divergence angle output by the output optical fiber is collimated by the collimating lens, the parallel laser beam is emitted from the light-emitting side of the lens barrel, 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 accessed is avoided.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. An optical fiber output head with collimation function, comprising: the optical fiber cooling device comprises a lens barrel, an optical fiber sleeve accommodated in the lens barrel, an optical fiber cooling assembly connected with the lens barrel, and a collimation assembly installed in the lens barrel; the optical fiber cooling assembly comprises a liquid cooling sleeve sleeved outside the optical fiber sleeve; the liquid cooling sleeve limits the optical fiber sleeve in the lens barrel; the collimating assembly comprises a collimating lens arranged in the lens barrel; the collimating lens is arranged corresponding to the light outlet of the optical fiber sleeve.

2. The optical fiber output head with the collimating function of claim 1, wherein a through external liquid inlet is arranged on a side surface of the lens barrel; a first through liquid outlet is also formed in the side surface of the lens barrel; the optical fiber sleeve comprises a fiber accommodating part which is arranged in the liquid cooling sleeve in a penetrating way and a column accommodating part which is connected with the fiber accommodating part; a through inner liquid inlet is formed in the outer side of the liquid cooling sleeve, and a through inner liquid outlet is also formed in the outer side of the liquid cooling sleeve; 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 reserved between the inner wall of the liquid cooling sleeve and the surface of the fiber containing part, and an optical fiber cooling flow channel is formed by the gap between the inner wall of the liquid cooling sleeve and the surface of the fiber containing part.

3. The fiber output head with collimation function of claim 2, further comprising a collimation cooling assembly connected to the lens barrel; the collimating cooling component comprises an outer sleeve sleeved outside the lens cone; a second outer liquid outlet is formed in the outer sleeve; a first positioning step part corresponding to the collimating lens is arranged on the inner side of the lens barrel; the collimating lens is arranged close to the first positioning step part; a collimation cooling flow passage is arranged between the outer sleeve and the lens cone and comprises a direct current section and a circulating current section; the direct-current section is communicated with the first liquid outlet and the starting end of the circulation section; the second outer liquid outlet is correspondingly communicated with the tail end of the circulation section; the circulation section corresponds to the first positioning step portion.

4. The fiber output head with the alignment function according to claim 3, wherein the alignment assembly further comprises an alignment locking ring screwed to the inside of the lens barrel; the collimating lens is disposed between the first positioning step and the collimating locking ring.

5. The optical fiber output head with the collimating function of claim 3, wherein the outside of the lens barrel is provided with a threaded area; a mounting part extends from the outer side of the lens barrel; the collimating cooling channel is between the threaded region and the mounting portion; the collimation cooling assembly further comprises a liquid cooling locking ring sleeved on the threaded area; the outer sleeve is arranged between the mounting part and the liquid cooling locking ring.

6. The optical fiber output head with the collimating function of claim 2, wherein the light-entering side of the lens barrel is provided with a third annular groove; a fourth annular groove is formed in the outer side of the liquid cooling sleeve; the fourth annular groove is positioned between the inner liquid inlet and the inner liquid outlet; a flange part corresponding to the light inlet side of the lens barrel extends from the liquid cooling sleeve; the third annular groove corresponds to the flange part; the optical fiber cooling assembly further comprises a third sealing ring accommodated in the third annular groove and a fourth sealing ring accommodated in the fourth annular groove.

7. The fiber output head with the collimating function of claim 2, wherein the fiber ferrule further comprises a connecting cylinder disposed between the fiber containing portion and the column containing portion; the outer side of the connecting cylinder is provided with an external thread; an internal thread is arranged on one side of the liquid cooling sleeve corresponding to the column accommodating part; the connecting cylinder is in threaded connection with the liquid cooling sleeve.

8. The optical fiber output head with collimation function as claimed in claim 2, wherein the lens barrel is provided with a tapered inner cavity between the column containing part and the collimation lens.

9. The optical fiber output head with the collimating function of claim 2, wherein a sixth annular groove is formed on the outer side of the liquid cooling sleeve; the sixth annular groove is positioned between one end of the liquid cooling sleeve facing the column containing part and the inner liquid outlet; the optical fiber cooling assembly further includes a seventh sealing ring received in the sixth annular groove.

10. The fiber output head with the collimating function of claim 1, further comprising a protective assembly connected to the lens barrel; the protective assembly comprises a protective lens mounted in the lens barrel; a second positioning step part corresponding to the protective lens is arranged on the inner side of the lens barrel; the protective assembly also comprises a protective lens locking ring in threaded connection with the inner side of the lens cone; the protective lens is positioned between the second positioning step part and the protective lens locking ring; a seventh annular groove is formed in the second positioning step part of the lens barrel; the seventh annular groove faces the protective lens; the shield assembly further includes an eighth seal ring received in the seventh annular groove.

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