CN115133385A

CN115133385A - Laser seal assembly and solid laser

Info

Publication number: CN115133385A
Application number: CN202210774548.6A
Authority: CN
Inventors: 马英俊; 李永辉
Original assignee: Anhui Guangzhi Technology Co Ltd
Current assignee: First Semiconductor Materials Co ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-09-30
Anticipated expiration: 2042-07-01

Abstract

Provided are a laser sealing module and a solid laser. The sealing assembly for the laser comprises an inner sealing piece and an outer sealing piece, wherein the inner sealing piece comprises a first shell, a first flange and a protruding column, and the first flange is used for being abutted against the outer wall of a laser amplification cavity of the solid-state laser in an axial sealing mode; the protruding column is provided with a through hole; the outer sealing piece comprises a second shell and a second flange, the second shell is used for being sleeved on the first shell, and the fourth opening is used for allowing the protruding column to penetrate out; the second flange is used for being attached to the first flange of the inner sealing piece in an axial sealing mode and being attached to the outer wall of the laser amplification cavity of the solid laser in an axial sealing mode. Thereby, sealing is achieved and sealing performance is improved.

Description

Laser sealing assembly and solid laser

Technical Field

The present disclosure relates to the field of lasers, and more particularly, to a sealing assembly for a laser and a solid laser.

Background

Compared with microsecond and nanosecond lasers, high-energy picosecond and femtosecond lasers are widely applied to the fields of material fine micromachining, LED scribing, solar photovoltaic, scientific research and the like due to higher peak power and narrower pulse width. The picosecond and femtosecond laser processing material is adopted, so that the processing precision is higher, the heat affected zone of the processing edge is extremely small, and the advantages of no burr, no carbonization and the like are achieved.

To meet the requirements of the above-mentioned machining applications, the peak power of the machining laser is usually required to reach the MW level. The current principle of generating MW magnitude peak power picosecond laser is as follows: a mode-locked seed source laser with dozens of MHz is selected, kHz to hundred kHz is selected through an acousto-optic or electro-optic modulation method, and watt-level power output is realized through amplification. Seed light pulse can be generated in various ways, and the current popular and popular way is an optical fiber SESAM mode-locked pulse seed source. The optical fiber SESAM mode-locked pulse seed source has the technical advantages that: the mode locking pulse output is stable, the mode locking pulse mode is passively adopted to ensure the stable self-starting, and the fundamental frequency pulse menu can be realized in an acousto-optic or electro-optic modulation mode.

The optical fiber SESAM mode-locked pulse seed source is output by adopting a polarization-maintaining optical fiber jumper mostly, and the output end of the optical fiber SESAM mode-locked pulse seed source is an FC-APC standard optical fiber output port. The other components of the fiber SESAM mode-locked pulse seed source are packaged in a separate box. Under the condition that the optical fiber SESAM mode-locking pulse seed source is used for amplifying solid laser, the optical fiber SESAM mode-locking pulse seed source needs to be output through a polarization-maintaining optical fiber jumper and led into a sealed solid amplifying laser cavity, and at the moment, the part which penetrates through the solid amplifying laser cavity needs to be sealed.

Disclosure of Invention

In view of the problems in the background art, an object of the present disclosure is to provide a sealing assembly for a laser and a solid-state laser, which achieve sealing and improve sealing performance.

Thus, a sealing assembly for a laser comprises an inner sealing piece and an outer sealing piece, wherein the inner sealing piece is a single piece, the inner sealing piece comprises a first shell, a first flange and a protruding column, the first shell is provided with a first cavity and a first end and a second end which are opposite along the axial direction, the first shell is provided with a first opening at the first end and a second opening at the second end, the diameter of the first opening is larger than that of the second opening, the first flange integrally and radially protrudes outwards from the periphery of the first end of the first shell, and the first flange is used for being tightly attached to the outer wall of a laser amplification cavity of the solid-state laser along the axial direction; the protruded column integrally protrudes outwards in the axial direction from the end wall at the second end of the first shell, the protruded column is provided with a through hole which penetrates through the protruded column in the axial direction, the through hole is communicated with the second opening of the first shell, and the through hole, the second opening and the first cavity are used for enabling a seed source output optical fiber jumper wire and a seed source optical fiber output port which are connected together to pass through in a sealing manner and further pass through the outer wall of a laser amplification cavity of the solid laser to enter the laser amplification cavity; the outer sealing element is an integral single piece and comprises a second shell and a second flange, the second shell is provided with a second cavity, a third end and a fourth end which are opposite along the axial direction, the third end of the second shell is provided with a third opening, the fourth end of the second shell is provided with a fourth opening, the diameter of the third opening is larger than that of the fourth opening, the second shell is used for being sleeved on the first shell along the axial direction, and the fourth opening is used for allowing the protruding column of the inner sealing element to penetrate out; a second flange integrally projecting radially outwardly from a peripheral edge at the third end of the second housing, the second flange for axially sealing against the first flange of the inner seal and axially sealing against an outer wall of the laser amplification cavity of the solid state laser, the post of the inner seal forming a seal with the second housing of the outer seal at the fourth opening of the second housing of the outer seal when the inner and outer seals are assembled together, the second flange of the outer seal and the first flange of the inner seal forming a seal; when the inner sealing piece and the outer sealing piece are assembled together and are assembled with the connected seed source output optical fiber jumper and the seed source optical fiber output port, a seal is formed between the protruding column of the inner sealing piece and the seed source output optical fiber jumper penetrating into the through hole.

In some embodiments, the inner seal is a rubber seal.

In some embodiments, the outer diameter of the post of the inner seal is greater than the diameter of the fourth opening of the second housing of the outer seal.

In some embodiments, the second flange of the outer seal is provided with a plurality of axially therethrough perforations, each perforation having a peripheral edge at a shortest radial distance from the center of the second casing that is greater than a greatest radial distance from the outer edge of the first flange to the center of the first casing, such that when the inner and outer seals are assembled together, the plurality of perforations of the outer seal are radially outward of the first flange of the inner seal; the sealing component for the laser further comprises a plurality of screws, and each screw is used for penetrating through the corresponding through hole and being in threaded connection with a screw hole in the outer wall of the laser amplification cavity of the solid laser so as to hermetically fix the second flange of the outer sealing piece on the outer wall of the laser amplification cavity of the solid laser and enable the first flange of the inner sealing piece and the outer wall of the laser amplification cavity of the solid laser to form sealing.

In some embodiments, the sealing assembly for the laser further comprises a locking member, wherein the locking member is used for locking the first stud and the seed source output optical fiber jumper from the outside when the seed source output optical fiber jumper and the seed source optical fiber output port which are assembled together by the inner sealing member and the outer sealing member and connected together pass through the through hole of the stud of the inner sealing member and the first cavity of the first shell of the inner sealing member, so that a seal is formed between the first stud and the seed source output optical fiber jumper in the radial direction and the circumferential direction.

In some embodiments, the outer seal is a rubber seal.

In some embodiments, the outer seal has a hardness greater than the hardness of the inner seal.

In some embodiments, the locking member includes a clamping portion, two protrusions, and a screw; the clamping part is used for clamping the protruding column of the inner sealing element from the outside along the circumferential direction; the two protruding parts protrude outwards from the two ends of the clamping part in the radial direction, one of the two protruding parts is provided with a threaded hole, and the other protruding part is provided with a through hole; the screw is used for being threaded with the threaded hole and passing through the through hole to connect the two protruding parts together and enable the clamping part to press the stud of the inner sealing element to deform the stud of the inner sealing element, and therefore sealing is formed between the first stud and the seed source output optical fiber jumper in the radial direction and the circumferential direction.

In some embodiments, the entrapment portion of the retaining member is provided with a plurality of slots, the plurality of slots being circumferentially spaced from one another; each slot extends along the axial direction, is closed along the two axial ends and penetrates through the clamping part along the radial direction.

In some embodiments, a solid state laser includes a seed source optical path packaging box, a seed source output optical fiber jumper, a seed source optical fiber output port, a laser amplification cavity, and the aforementioned sealing component for a laser; the outer wall of the laser amplification cavity is provided with a through hole, the first shell of an inner sealing piece of the sealing assembly for the laser axially covers the through hole, and the through hole of the stud of the inner sealing piece is axially aligned with the through hole so that a seed source output optical fiber jumper and a seed source optical fiber output port which are connected together penetrate through the through hole of the stud of the inner sealing piece, the first cavity of the first shell of the inner sealing piece and the through hole of the outer wall of the laser amplification cavity to enter the laser amplification cavity.

The beneficial effects of this disclosure are as follows: when the inner sealing element and the outer sealing element are assembled together, a seal is formed between the protruding column of the inner sealing element and the seed source output optical fiber jumper wire which penetrates into the through hole; the first flange is attached to the outer wall of the laser amplification cavity in a sealing mode to achieve one sealing around the through hole in the outer wall of the laser amplification cavity, and the second flange is attached to the outer wall of the laser amplification cavity in a sealing mode to achieve the other sealing.

Drawings

Fig. 1 is an assembly diagram of a solid state laser according to the present disclosure.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a cross-sectional view of fig. 1.

Fig. 4 is a partially enlarged view of fig. 3.

FIG. 5 is an enlarged cross-sectional view of the inner and outer seals of FIG. 4.

Fig. 6 is an enlarged view of a retaining member of the seal assembly for a laser in fig. 2.

Wherein the reference numerals are as follows:

100 solid laser 513 stud

1 seed source light path packaging box 513a through hole

2 external sealing piece of seed source output optical fiber jumper wire 52

3 second housing of seed source optical fiber output port 521

4 laser amplification cavity 521a second cavity

41 third end of outer wall 521b

411 screw hole 521c fourth end

412 pass through aperture 521d third opening

5 sealing component 521e for laser use fourth opening

D-axis 522 second flange

51 inner seal 522a piercing

511 first housing 53 screw

511a first cavity 54 locking member

511b first end 541 sandwiches portion

511c second end 541a slot

511d first opening 542 projection

511e second opening 543 screw

512 first flange

Detailed Description

The accompanying drawings illustrate embodiments of the present disclosure and it is to be understood that the disclosed embodiments are merely examples of the disclosure, which can be embodied in various forms, and therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure.

Referring to fig. 1 to 6, the solid-state laser 100 includes a seed source optical fiber package 1, a seed source output optical fiber jumper 2, a seed source optical fiber output port 3, a laser amplification cavity 4, and a laser sealing assembly 5.

The seed source optical circuit packaging box 1 is used for packaging a corresponding device (not shown) for generating a seed light pulse. The seed source optical path enclosure 1 may be, but is not limited to, a fiber SESAM mode-locked pulsed seed source.

The seed source output optical fiber jumper 2 is used for outputting the seed light pulse of the seed source optical path packaging box 1.

The seed source optical fiber output port 3 is used as an output port of the seed light pulse and is connected with the seed source output optical fiber jumper 2. The seed source output optical fiber jumper 2 and the seed source optical fiber output port 3 can be connected together by means of optical fiber fusion for example. The seed source optical fiber output port 3 can be an FC-APC seed source optical fiber output port or an SMA905 seed source optical fiber output port, but is not limited thereto, and the seed source optical fiber output port 3 can be any type of standard optical fiber output port.

The laser amplification cavity 4 is used for receiving the seed light pulse output by the seed source optical fiber output port 3 and performing solid laser amplification.

The outer wall 41 of the laser amplification cavity 4 is provided with a through hole 412, and the through hole 412 is used for the seed source output optical fiber jumper 2 and the seed source optical fiber output port 3 which are connected together to penetrate into the laser amplification cavity 4.

The sealing assembly 5 for the laser is used for sealing the seed source output optical fiber jumper 2 and the seed source optical fiber output port 3 which are connected together and penetrate into the laser amplification cavity 4 on the outer wall 41 of the laser amplification cavity 4.

Referring to fig. 2, 4 to 6, the seal assembly 5 for a laser includes an inner seal member 51 and an outer seal member 52.

The inner seal member 51 is a unitary one-piece member. The inner seal 51 is manufactured by a suitable manufacturing process depending on the use of the material, for example, if the inner seal 51 is a rubber seal, injection molding may be used. If the inner seal 51 is a rubber seal, sealing can be achieved by sufficiently utilizing the elastic expansion and contraction characteristics of rubber.

The inner seal 51 includes a first housing 511, a first flange 512, and a post 513.

The first housing 511 has a first cavity 511a and opposite first and second ends 511b and 511c along the axial direction D, the first housing 511 has a first opening 511D at the first end 511b and a second opening 511e at the second end 511c, and the first opening 511D has a diameter larger than that of the second opening 511 e. As shown, the profile of the first housing 511 may be approximately hemispherical. When installed, as shown in fig. 4, the laser covers the through hole 412 with the first housing 511 of the inner seal 51 of the seal assembly 5 in the axial direction D.

A first flange 512 integrally projects radially outwardly from the peripheral edge at the first end 511b of the first housing 511, the first flange 512 being adapted to abut against the outer wall 41 of the laser amplification chamber 4 of the solid state laser 100 in the axial direction D. The first flange 512 is tightly attached to the outer wall 41 of the laser amplification cavity 4 of the solid-state laser 100, so that the mounted seed source output optical fiber jumper 2 and the seed source optical fiber output port 3 can be sealed through the outer wall 41 of the laser amplification cavity 4 at the position passing through the through hole 412. Note that the first flange 512 is formed around the entire circumference at the first end 511b of the first housing 511.

The protruding pillar 513 integrally protrudes from the end wall at the second end 511c of the first housing 511 in the axial direction D, the protruding pillar 513 has a through hole 513a penetrating through the protruding pillar 513 in the axial direction D, the through hole 513a communicates with the second opening 511e of the first housing 511, and the through hole 513a, the second opening 511e and the first cavity 511a are used for the seed source output optical fiber jumper 2 and the seed source optical fiber output port 3 connected together to pass through in a sealing manner, and further pass through the outer wall 41 of the laser amplification cavity 4 of the solid-state laser 100 to enter the inside of the laser amplification cavity 4. When mounted, the through hole 513a of the post 513 of the inner seal 51 is aligned with the through hole 412 in the axial direction D for the seed source output optical fiber jumper 2 and the seed source optical fiber output port 3 connected together to pass through the through hole 513a of the post 513 of the inner seal 51 and the first cavity 511a of the first housing 511 of the inner seal 51, the through hole 412 of the outer wall 41 of the laser amplification cavity 4 into the laser amplification cavity 4.

The outer seal 52 is a one-piece, unitary member. The outer seal 5 is manufactured by a suitable manufacturing process depending on the use of the material, for example, if the outer seal 52 is a rubber seal, injection molding may be used. If the outer seal 52 is a rubber seal, the elastic expansion and contraction characteristics of the rubber can be sufficiently utilized to achieve sealing. Of course, since the outer seal member 52 is fitted over the inner seal member 51, the hardness of the outer seal member 52 is greater than that of the inner seal member 51 in order to allow both members to exert the elastic expansion and contraction action of the rubber material.

The outer seal 52 includes a second housing 521 and a second flange 522.

The second housing 521 has a second cavity 521a and a third end 521b and a fourth end 521c opposite to each other in the axial direction D, the second housing 521 has a third opening 521D at the third end 521b and a fourth opening 521e at the fourth end 521c, and the diameter of the third opening 521D is larger than that of the fourth opening 521 e. As shown, the second housing 521 may be approximately hemispherical in profile. The second housing 521 is used for being sleeved on the first housing 511 along the axial direction D, and the fourth opening 521e is used for allowing the protruding column 513 of the inner seal 51 to pass through, as shown in fig. 4, the first housing 511 is received in the second cavity 521a of the second housing 521.

A second flange 522 projects radially outwardly integrally from the peripheral edge at the third end 521b of the second housing 521, the second flange 522 being adapted to sealingly abut in the axial direction D against the first flange 512 of the inner seal 51 and in the axial direction D against the outer wall 41 of the laser amplification cavity 4 of the solid state laser 100. The second flange 522 is tightly attached to the outer wall 41 of the laser amplification cavity 4 along the axial direction D, so that the mounted seed source output optical fiber jumper 2 and the seed source optical fiber output port 3 can be sealed through the outer wall 41 of the laser amplification cavity 4 at the position passing through the through hole 412. Note that the second flange 522 is formed around the entire circumference at the third end 521b of the second housing 521. Note also that in fig. 4, in order to show the assembled relationship, a state is shown in which the second flange 522 is spaced apart from the outer wall 41 of the laser amplification chamber 4. The second flange 522 sealingly abuts the first flange 512 of the inner seal 51 in the axial direction D, the second flange 522 of the outer seal 52 and the first flange 512 of the inner seal 51 forming a seal.

When the inner seal 51 and the outer seal 52 are assembled together, the post 513 of the inner seal 51 forms a seal with the second housing 521 of the outer seal 52 at the fourth opening 521e of the second housing 521 of the outer seal 52.

In the sealing assembly 5 for the laser, when the inner sealing piece 51 and the outer sealing piece 52 are assembled together, the sealing contact of the first flange 512 and the outer wall 41 of the laser amplification cavity 4 is sealed around the through hole 412 of the outer wall 41 of the laser amplification cavity 4, and the sealing contact of the second flange 522 and the outer wall 41 of the laser amplification cavity 4 is sealed for one time, so that the sealing performance of the mounted seed source output optical fiber jumper 2 and the seed source optical fiber output port 3 passing through the through hole 412 of the outer wall 41 of the laser amplification cavity 4 is improved through the two seals.

In the sealing assembly 5 for the laser, when the inner sealing element 51 and the outer sealing element 52 are assembled together, the sealing abutment of the second flange 522 of the outer sealing element 52 and the first flange 512 of the inner sealing element 51 realizes one seal, the pillar 513 of the inner sealing element 51 and the second housing 521 of the outer sealing element 52 form another seal at the fourth opening 521e of the second housing 521 of the outer sealing element 52, and the two seals realize the seal between the inner sealing element 51 and the outer sealing element 52, even if the external air enters between the second flange 522 and the outer wall 41 of the laser amplification cavity 4, the entering air is changed into the gap between the first housing 511 and the second housing 521 by the resistance caused by the sealing relationship between the first flange 512 and the outer wall 41 of the laser amplification cavity 4 (i.e. based on the principle of minimum force action), which is also applicable to the case where the external air enters 521 from between the pillar 513 of the inner sealing element 51 and the second housing 521 of the outer sealing element 52, in an extreme case, when external air enters not only between the second flange 522 and the outer wall 41 of the laser amplification chamber 4 but also between the protruding column 513 of the inner seal 51 and the second housing 521 of the outer seal 52, the two portions of the entering air form a communicating relationship, and based on the principle of minimum action of force, the air still cannot enter the first chamber 511a, thereby improving the sealing performance of the connected seed source output optical fiber jumper 2 and the seed source optical fiber output port 3 passing through the through hole 412 of the outer wall 41 of the laser amplification chamber 4.

In the seal assembly 5 for a laser, when the inner seal 51 and the outer seal 52 are assembled together and assembled with the connected seed source output optical fiber jumpers 2 and the seed source optical fiber output ports 3, a seal is formed between the post 513 of the inner seal 51 and the seed source output optical fiber jumpers 2 penetrating into the through holes 513 a.

In the sealing assembly 5 for the laser, when the inner sealing element 51 and the outer sealing element 52 are assembled together, an accommodating space is formed between the first housing 511 and the second housing 521, the protruding column 513 of the sealing element 51 is in sealing contact with the seed source output optical fiber jumper 2 penetrating into the through hole 513a, especially when the two are made of rubber materials capable of elastic expansion and contraction, the rubber materials and the accommodating space can be well adapted to buffering and releasing of external impact (such as stress or vibration), and the inner sealing element 51 and the outer sealing element 52 realize an integrally long external impact buffering path through the protruding column 513, so that the external impact can be effectively buffered and released, and the stability and durability of sealing are improved.

In one example, the outer diameter of the post 513 of the inner seal 51 is greater than the diameter of the fourth opening 521e of the second housing 521 of the outer seal 52. Thus, the diameters of the pillar 513 of the inner seal 51 and the fourth opening 521e of the second housing 521 of the outer seal 52 can be directly sealed by interference fit. Particularly, when both the inner seal member 51 and the outer seal member 52 are made of an elastically stretchable rubber material, the sealing performance is further improved.

As shown in fig. 4 and 5, in an example, the second flange 522 of the outer seal 52 is provided with a plurality of through holes 522a penetrating in the axial direction D, and a shortest radial distance of a peripheral edge of each through hole 522a from a center of the second housing 521 is greater than a largest radial distance of an outer edge of the first flange 512 from a center of the first housing 511, so that when the inner seal 51 and the outer seal 52 are assembled together, the plurality of through holes 522a of the outer seal 52 are located radially outside the first flange 512 of the inner seal 51; the laser sealing assembly 5 further includes a plurality of screws 53, each screw 53 being adapted to pass through a corresponding through hole 522a and to be screwed into a screw hole 411 on the outer wall 41 of the laser amplification chamber 4 of the solid-state laser 100, so as to sealingly fix the second flange 522 of the outer sealing member 52 to the outer wall 41 of the laser amplification chamber 4 and to seal between the first flange 512 of the inner sealing member 51 and the outer wall 41 of the laser amplification chamber 4 of the solid-state laser 100. By the arrangement of the screws 53, the removable mounting of the outer seal 52 is achieved. Of course, in an alternative embodiment, the second flange 522 of the outer seal 52 is non-detachably mounted to the outer wall 41 of the laser amplification cavity 4 by gluing.

Referring to fig. 2 and 6, the sealing assembly 5 for the laser further includes a locking member 54, and the locking member 54 is used for locking the first stud 513 and the seed source optical fiber jumper 2 from the outside when the inner seal 51 and the outer seal 52 are assembled and the seed source optical fiber jumper 2 and the seed source optical fiber output port 3 connected together pass through the through hole 513a of the stud 513 of the inner seal 51 and the first cavity 511a of the first housing 511 of the inner seal 51, so that a seal is formed between the first stud 513 and the seed source output optical fiber jumper 2 in the radial direction and the circumferential direction.

As shown in fig. 6, in one example, the locking member 54 includes a clamping portion 541, two protrusions 542, and a screw 543; the sandwiching portion 541 for circumferentially sandwiching the pillar 513 of the inner seal 51 from the outside; two protruding portions 542 protrude radially outward from both ends of the sandwiching portion 541, one of the two protruding portions 542 is provided with a screw hole (not shown), and the other of the two protruding portions 542 is provided with a via hole (not shown); the screw 543 is used to thread through the through hole and with the threaded hole to connect the two projections 542 together and to press the clamping portion 541 against the post 513 of the inner seal 51 to deform the post 513 of the inner seal 51, so that a seal is formed between the first post 513 and the seed source output optical fiber jumper 2 in radial and circumferential directions. The force for pressing the stud 513 of the inner seal 51 can be adjusted by the screw 543, so that the sealing property formed between the first stud 513 and the seed source output optical fiber jumper 2 can be enhanced. In particular, when the inner seal member 51 is made of an elastically stretchable rubber material, the sealing performance is further improved.

As shown in fig. 6, the sandwiching portion 541 of the locking member 54 is provided with a plurality of slots 541a, the slots 541a being circumferentially spaced from each other; each slit 541a extends in the axial direction D, is closed at both ends in the axial direction D, and radially penetrates through the sandwiching portion 541. The provision of the slot 541a facilitates more convenient and more compliant wrapping of the pinching portion 541 over the post 513 of the inner seal 51. In addition, the slits 541a provide a space for buffering and releasing an external impact, and especially, when a plurality of slits 541a are provided, the buffering and releasing of the external impact is more remarkable.

Note that in the present disclosure, the solid state laser 100 may be, but is not limited to, a picosecond laser. Likewise, the laser sealing assembly 5 is not limited to use in the solid state laser 100, and may be used in any suitable laser.

The above detailed description is used to describe a number of exemplary embodiments, but is not intended to limit the combinations explicitly disclosed herein. Thus, unless otherwise specified, various features disclosed herein can be combined together to form a number of additional combinations that are not shown for the sake of brevity.

Claims

1. A seal assembly (5) for a laser comprising an inner seal (51) and an outer seal (52),

the inner seal (51) is a one-piece, the inner seal (51) comprising a first housing (511), a first flange (512), and a stud (513),

the first shell (511) has a first cavity (511a) and opposite first (511b) and second (511c) ends in an axial direction (D), the first shell (511) having a first opening (511D) at the first end (511b) and a second opening (511e) at the second end (511c), the first opening (511D) having a diameter larger than that of the second opening (511e),

a first flange (512) projecting radially outwards integrally from a peripheral edge at a first end (511b) of the first housing (511), the first flange (512) being intended to sealingly abut against an outer wall (41) of a laser amplification cavity (4) of the solid state laser (100) in an axial direction (D);

the protruded column (513) integrally protrudes outwards in the axial direction (D) from the end wall at the second end (511c) of the first shell (511), the protruded column (513) is provided with a through hole (513a) penetrating through the protruded column (513) along the axial direction (D), the through hole (513a) is communicated with a second opening (511e) of the first shell (511), and the through hole (513a), the second opening (511e) and the first cavity (511a) are used for enabling a seed source output optical fiber jumper (2) and a seed source optical fiber output port (3) which are connected together to pass through in a sealing mode and further pass through an outer wall (41) of a laser amplification cavity (4) of the solid laser (100) to enter the interior of the laser amplification cavity (4);

the outer sealing member (52) is a one-piece single piece, the outer sealing member (52) comprises a second shell (521) and a second flange (522),

the second shell (521) is provided with a second cavity (521a), a third end (521b) and a fourth end (521c) which are opposite in the axial direction (D), the second shell (521) is provided with a third opening (521D) at the third end (521b) and a fourth opening (521e) at the fourth end (521c), the diameter of the third opening (521D) is larger than that of the fourth opening (521e), the second shell (521) is used for being sleeved on the first shell (511) in the axial direction (D), and the fourth opening (521e) is used for allowing the protruding column (513) of the inner sealing element (51) to penetrate out;

a second flange (522) integrally and radially protrudes outwards from the peripheral edge at the third end (521b) of the second housing (521), the second flange (522) being used for sealing and abutting against the first flange (512) of the inner sealing member (51) along the axial direction (D) and against the outer wall (41) of the laser amplification cavity (4) of the solid laser (100) along the axial direction (D),

when the inner seal (51) and the outer seal (52) are assembled together, the stud (513) of the inner seal (51) forms a seal with the second housing (521) of the outer seal (52) at the fourth opening (521e) of the second housing (521) of the outer seal (52), and the second flange (522) of the outer seal (52) forms a seal with the first flange (512) of the inner seal (51);

when the inner sealing element (51) and the outer sealing element (52) are assembled together and are assembled with the connected seed source output optical fiber jumper (2) and the seed source optical fiber output port (3), a seal is formed between the stud (513) of the inner sealing element (51) and the seed source output optical fiber jumper (2) penetrating into the through hole (513 a).

2. The seal assembly (5) for a laser according to claim 1,

the inner seal (51) is a rubber seal.

3. The seal assembly (5) for a laser according to claim 2,

the outer diameter of the stud (513) of the inner seal (51) is larger than the diameter of the fourth opening (521e) of the second housing (521) of the outer seal (52).

4. The seal assembly (5) for a laser according to claim 1 or 2,

the second flange (522) of the outer seal (52) is provided with a plurality of through holes (522a) that penetrate in the axial direction (D),

the shortest radial distance of the periphery of each perforation (522a) from the center of the second shell (521) is larger than the maximum radial distance of the outer edge of the first flange (512) from the center of the first shell (511), so that when the inner seal (51) and the outer seal (52) are assembled together, the plurality of perforations (522a) of the outer seal (52) are positioned radially outside the first flange (512) of the inner seal (51);

the sealing assembly (5) for the laser further comprises a plurality of screws (53), and each screw (53) is used for penetrating through the corresponding through hole (522a) and being in threaded connection with a screw hole (411) on the outer wall (41) of the laser amplification cavity (4) of the solid laser (100) so as to hermetically fix the second flange (522) of the outer sealing piece (52) on the outer wall (41) of the laser amplification cavity (4) of the solid laser (100) and enable the first flange (512) of the inner sealing piece (51) and the outer wall (41) of the laser amplification cavity (4) of the solid laser (100) to form a seal.

5. The seal assembly (5) for a laser according to claim 1,

the sealing component (5) for the laser also comprises a locking piece (54),

the locking piece (54) is used for locking the first protruding column (513) and the seed source output optical fiber jumper (2) from the outside when the seed source output optical fiber jumper (2) and the seed source optical fiber output port (3) which are assembled together and connected together by the inner sealing piece (51) and the outer sealing piece (52) penetrate through the through hole (513a) of the protruding column (513) of the inner sealing piece (51) and the first cavity (511a) of the first shell (511) of the inner sealing piece (51), so that the first protruding column (513) and the seed source output optical fiber jumper (2) form sealing in the radial direction and the circumferential direction.

6. The seal assembly (5) for a laser according to claim 5,

the outer seal (52) is a rubber seal.

7. The seal assembly (5) for a laser according to claim 6,

the hardness of the outer seal member (52) is greater than the hardness of the inner seal member (51).

8. The seal assembly (5) for a laser according to claim 5,

the locking piece (54) comprises a clamping part (541), two protruding parts (542) and a screw (543);

a clamping portion (541) for clamping the stud (513) of the inner seal (51) from the outside in the circumferential direction;

the two protruding parts (542) protrude outwards from the two ends of the clamping part (541) in the radial direction, one of the two protruding parts (542) is provided with a threaded hole, and the other of the two protruding parts (542) is provided with a through hole;

the screw (543) is used for screwing with the threaded hole passing through the through hole to connect the two protruding parts (542) together and enable the clamping part (541) to press the convex column (513) of the inner sealing piece (51) to deform the convex column (513) of the inner sealing piece (51), so that a seal is formed between the first convex column (513) and the seed source output optical fiber jumper (2) in the radial direction and the circumferential direction.

9. The seal assembly (5) for a laser according to claim 8,

the clamping part (541) of the locking piece (54) is provided with a plurality of slots (541a), and the slots (541a) are spaced from each other along the circumferential direction;

each slit (541a) extends in the axial direction (D), is closed at both ends in the axial direction (D), and radially penetrates through the sandwiching portion (541).

10. A solid state laser (100) comprising a seed source optical path packaging box (1), a seed source output optical fiber jumper (2), a seed source optical fiber output port (3), a laser amplification cavity (4), and a laser sealing assembly (5) according to any one of claims 1 to 9;

the outer wall (41) of the laser amplification cavity (4) is provided with a through hole (412), the first shell (511) of an inner sealing piece (51) of the sealing assembly (5) for the laser covers the through hole (412) along the axial direction (D), and a through hole (513a) of a protruding column (513) of the inner sealing piece (51) is aligned with the through hole (412) along the axial direction (D) so that a seed source output optical fiber jumper (2) and a seed source optical fiber output port (3) which are connected together penetrate through the through hole (513a) of the protruding column (513) of the inner sealing piece (51) and the first cavity (511a) of the first shell (511) of the inner sealing piece (51) and the through hole (412) of the outer wall (41) of the laser amplification cavity (4) to enter the laser amplification cavity (4).