CN115133385B - Sealing assembly for laser and solid laser - Google Patents
Sealing assembly for laser and solid laser Download PDFInfo
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- CN115133385B CN115133385B CN202210774548.6A CN202210774548A CN115133385B CN 115133385 B CN115133385 B CN 115133385B CN 202210774548 A CN202210774548 A CN 202210774548A CN 115133385 B CN115133385 B CN 115133385B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06704—Housings; Packages
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1106—Mode locking
- H01S3/1112—Passive mode locking
- H01S3/1115—Passive mode locking using intracavity saturable absorbers
- H01S3/1118—Semiconductor saturable absorbers, e.g. semiconductor saturable absorber mirrors [SESAMs]; Solid-state saturable absorbers, e.g. carbon nanotube [CNT] based
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Nanotechnology (AREA)
- Lasers (AREA)
Abstract
A sealing assembly for a laser and a solid-state laser are provided. 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 the laser amplifying cavity of the solid laser in an axial sealing manner; 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 abutted against the first flange of the inner sealing piece in an axial sealing mode and being abutted against the outer wall of the laser amplifying cavity of the solid laser in an axial sealing mode, when the inner sealing piece and the outer sealing piece are assembled together, the protruding column forms a seal with the fourth opening of the second shell, the second flange forms a seal with the first flange, and the protruding column forms a seal with a seed source output optical fiber jumper penetrating into the through hole. Thereby, sealing is achieved and sealing performance is improved.
Description
Technical Field
The present disclosure relates to the field of lasers, and more particularly to a sealing assembly for a laser and a solid state laser.
Background
Compared with microsecond and nanosecond lasers, the high-energy picosecond and femtosecond lasers have higher peak power and narrower pulse width, and are widely applied to the fields of material fine micromachining, LED scribing, solar photovoltaic, scientific research and the like. The picosecond and femtosecond laser is adopted to process the material, so that the processing precision is higher, the heat affected zone of the processed edge is extremely small, and the processing method has the advantages of no burr, no carbonization and the like.
In order to meet the requirements of the processing applications described above, the peak power of the processing laser is typically required to be on the order of MW. The current principle of generating MW magnitude peak power picosecond laser is: a mode-locked seed source laser with a frequency of tens of MHz is selected, kHz to hundred kHz is selected by an acousto-optic or electro-optic modulation method, and then the power output of watt level is realized by amplification. There are various ways of generating seed light pulses, and a popular and common way is to use a fiber optic SESAM mode-locked pulse seed source. The optical fiber SESAM mode-locking pulse seed source has the technical advantages that: the mode locking pulse output is stable, the passive mode locking pulse mode ensures the self-starting stability, and the fundamental frequency pulse menu can be realized by an acousto-optic or electro-optic modulation mode.
The optical fiber SESAM mode locking pulse seed source is output by a polarization maintaining optical fiber jumper, and the output end of the optical fiber SESAM mode locking 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 carrying out solid laser amplification, the optical fiber SESAM mode locking pulse seed source needs to be introduced into a sealed solid amplifying laser cavity through a polarization maintaining optical fiber jumper wire output, and at the moment, the part passing 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 that realize sealing and improve sealing performance.
Thus, a sealing assembly for a laser comprises an inner seal and an outer seal, the inner seal being a unitary single piece, the inner seal comprising a first housing having a first cavity and axially opposed first and second ends, the first housing having a first opening at the first end and a second opening at the second end, the first opening having a diameter greater than the diameter of the second opening, a first flange integrally projecting radially outwardly from a periphery at the first end of the first housing, the first flange for axially sealingly bearing against an outer wall of a laser amplification cavity of a solid state laser; the protruding column integrally protrudes outwards axially from the end wall at the second end of the first shell, the protruding column is provided with a through hole which penetrates through the protruding column axially, 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 and a seed source optical fiber output port which are connected together to pass through in a sealing mode and further pass through the outer wall of a laser amplifying cavity of the solid laser to enter the laser amplifying cavity; the outer sealing piece 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 in the axial direction, the second shell is provided with a third opening at the third end and a fourth opening at the fourth end, the diameter of the third opening is larger than that of the fourth opening, the second shell is sleeved on the first shell in the axial direction, and the fourth opening is used for allowing a protruding column of the inner sealing piece to pass through; a second flange integrally projecting radially outwardly from the periphery at the third end of the second housing, the second flange for axially sealingly abutting against the first flange of the inner seal and axially sealingly abutting against the 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 seal and the outer seal are assembled together, the second flange of the outer seal and the first flange of the inner seal forming a seal; when the inner seal and the outer seal are assembled together and assembled with the connected seed source output optical fiber jumper and seed source optical fiber output port, a seal is formed between the protruding column of the inner seal and the seed source output optical fiber jumper penetrating 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 perforations extending axially therethrough, the shortest radial distance of the periphery of each perforation from the center of the second housing being greater than the maximum radial distance of the outer edge of the first flange from the center of the first housing, such that when the inner and outer seals are assembled together, the plurality of perforations of the outer seal are located radially outward of the first flange of the inner seal; the sealing assembly for the laser also comprises a plurality of screws, wherein each screw is used for penetrating through a corresponding through hole and being in threaded connection with a screw hole on the outer wall of the laser amplifying cavity of the solid laser, so that the second flange of the outer sealing piece is fixed on the outer wall of the laser amplifying cavity of the solid laser in a sealing way, and the first flange of the inner sealing piece and the outer wall of the laser amplifying cavity of the solid laser form a sealing way.
In some embodiments, the sealing assembly for a laser further comprises a locking member for locking the first post and the seed source output fiber jumper from the outside when the seed source output fiber jumper and the seed source fiber output port assembled together and connected together pass through the through hole of the post of the inner sealing member and the first cavity of the first housing of the inner sealing member, such that a seal is formed between the first post and the seed source output fiber jumper in a radial and circumferential direction.
In some embodiments, the outer seal is a rubber seal.
In some embodiments, the outer seal has a hardness that is greater than the hardness of the inner seal.
In some embodiments, the locking member comprises a clip portion, two protruding portions, 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 of the two protruding parts is provided with a through hole; the screw is used for being screwed with the threaded hole through the through hole so as to connect the two protruding parts together and enable the clamping part to press the protruding column of the inner sealing piece to deform the protruding column of the inner sealing piece, and therefore a seal is formed between the first protruding column and the seed source output optical fiber jumper wire in the radial direction and the circumferential direction.
In some embodiments, the clamping portion of the locking member is provided with a plurality of slots that are circumferentially spaced apart from one another; each slot extends along the axial direction, is closed along the two ends along the axial direction and penetrates through the clamping part along the radial direction.
In some embodiments, a solid state laser includes a seed source optical path package, a seed source output fiber jumper, a seed source fiber output port, a laser amplification cavity, and a sealing assembly for the aforementioned laser; the outer wall of the laser amplification cavity is provided with a through hole, the through hole is axially covered by the first shell of the inner sealing member of the sealing assembly for the laser, and the through hole of the protruding column of the inner sealing member is axially aligned with the through hole so that the seed source output optical fiber jumper wire and the seed source optical fiber output port which are connected together penetrate through the through hole of the protruding column of the inner sealing member and the through hole of the first shell of the inner sealing member, and the through hole of the outer wall of the laser amplification cavity and enter the laser amplification cavity.
The beneficial effects of the present disclosure are as follows: when the inner sealing piece and the outer sealing piece are assembled together, sealing is formed between the protruding column of the inner sealing piece and the seed source output optical fiber jumper penetrating the through hole; the sealing and leaning of the first flange and the outer wall of the laser amplifying cavity realize one sealing, and the sealing and leaning of the second flange and the outer wall of the laser amplifying cavity realize the other sealing, so that the sealing performance of the part of the installed seed source output optical fiber jumper wire and the part of the installed seed source optical fiber output port penetrating through the passing hole of the outer wall of the laser amplifying cavity is improved through the two sealing.
Drawings
Fig. 1 is an assembly view 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 partial 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 sealing assembly for the laser of fig. 2.
Wherein reference numerals are as follows:
100 solid laser 513 stud
1 Seed source light path packaging box 513a through hole
2 Seed source output optical fiber jumper 52 external sealing member
3 Seed source optical fiber output port 521 second housing
4 Laser amplification cavity 521a second cavity
41 Outer wall 521b third end
411 Screw 521c fourth end
412 Through the third opening of 521d
Sealing assembly 521e fourth opening for 5-laser
D-axis 522 second flange
51 Inner seal 522a is perforated
511 First housing 53 screw
511A first cavity 54 locking member
511B first end 541 wrapping portion
511C second end 541a slot
511D first opening 542 projection
511E second opening 543 screw
512 First flange
Detailed Description
The drawings illustrate embodiments of the present disclosure, and it is to be understood that the disclosed embodiments are merely examples of the disclosure that may be embodied in various forms and that, 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 practice the disclosure.
Referring to fig. 1 to 6, a solid state laser 100 includes a seed source optical path 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 sealing assembly 5 for a laser.
The seed source optical path package 1 is used to package a corresponding device (not shown) that generates a seed optical pulse. The seed source optical path enclosure 1 may be, but is not limited to, a fiber optic SESAM mode locked pulsed seed source.
The seed source output optical fiber jumper wire 2 is used for outputting seed light pulses 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 wire 2. The seed source output optical fiber jumper 2 and the seed source optical fiber output port 3 may be connected together by, for example, optical fiber fusion. The seed source fiber output port 3 may be an FC-APC seed source fiber output port or an SMA905 seed source fiber output port, but is not limited thereto, and the seed source fiber output port 3 may be any type of standard fiber output port.
The laser amplifying cavity 4 is used for receiving the seed light pulse output by the seed source optical fiber output port 3 and amplifying the solid laser.
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 allowing the seed source output optical fiber jumper wire 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 at the outer wall 41 of the laser amplification cavity 4.
Referring to fig. 2,4 to 6, the sealing assembly 5 for a laser includes an inner seal 51 and an outer seal 52.
The inner seal 51 is a unitary one-piece. The inner seal 51 is manufactured by a suitable manufacturing process depending on the use of materials, 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, the elastic expansion and contraction characteristics of rubber can be fully utilized to achieve sealing.
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, 511c along the axial direction D, the first housing 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 511 e. As shown, the profile of the first housing 511 may be approximately hemispherical. At the time of installation, as shown in fig. 4, the first housing 511 of the inner seal 51 of the seal assembly 5 for laser use covers the through hole 412 in the axial direction D.
The first flange 512 integrally protrudes radially outward from the periphery at the first end 511b of the first housing 511, the first flange 512 being for abutment against the outer wall 41 of the laser amplification chamber 4 of the solid-state laser 100 in the axial direction D. By the sealing of the first flange 512 against the outer wall 41 of the laser amplification chamber 4 of the solid-state laser 100, it is possible to seal the portion of the installed seed-source output optical fiber jumper 2 and the seed-source optical fiber output port 3 that passes through the passage hole 412 of the outer wall 41 of the laser amplification chamber 4. Note that the first flange 512 is formed entirely around the periphery at the first end 511b of the first housing 511.
The stud 513 integrally protrudes axially outwardly from the end wall at the second end 511c of the first housing 511, the stud 513 having a through hole 513a penetrating the stud 513 in the axial direction D, the through hole 513a communicating with the second opening 511e of the first housing 511, the through hole 513a, the second opening 511e and the first cavity 511a for the seed source output optical fiber jumper 2 and the seed source optical fiber output port 3 connected together to pass through hermetically and thus through the outer wall 41 of the laser amplification cavity 4 of the solid-state laser 100 into the laser amplification cavity 4. When installed, the through hole 513a of the post 513 of the inner seal member 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 member 51 and the first cavity 511a of the first housing 511 of the inner seal member 51, the through hole 412 of the outer wall 41 of the laser amplification cavity 4, and into the laser amplification cavity 4.
The outer seal 52 is a unitary, one-piece. The outer seal 5 is manufactured by a suitable manufacturing process depending on the use of materials, 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 rubber can be fully utilized to achieve sealing. Of course, since the outer seal 52 is to be fitted over the inner seal 51, the hardness of the outer seal 52 is greater than that of the inner seal 51 in order to allow both to exert the elastic telescoping 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, opposite third and fourth ends 521b and 521c in the axial direction D, the second housing 521 having a third opening 521D at the third end 521b and a fourth opening 521e at the fourth end 521c, the third opening 521D having a diameter 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 configured to be sleeved on the first housing 511 along the axial direction D, and the fourth opening 521e is configured to allow the protrusion 513 of the inner seal 51 to pass through, where, as shown in fig. 4, the first housing 511 is accommodated in the second cavity 521a of the second housing 521.
The second flange 522 integrally protrudes radially outward from the periphery at the third end 521b of the second housing 521, the second flange 522 being for sealingly abutting 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 chamber 4 of the solid-state laser 100. The second flange 522 is in sealing contact with 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 pass through the part of the outer wall 41 of the laser amplification cavity 4, where the through hole 412 is located, to be sealed. Note that the second flange 522 is formed entirely around the periphery at the third end 521b of the second housing 521. Note also that in fig. 4, 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, and the second flange 522 of the outer seal 52 and the first flange 512 of the inner seal 51 form a seal.
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.
In the sealing assembly 5 for a laser, when the inner seal member 51 and the outer seal member 52 are assembled together, the passage hole 412 surrounding the outer wall 41 of the laser amplification chamber 4, the sealing abutment of the first flange 512 with the outer wall 41 of the laser amplification chamber 4 achieves one seal, and the sealing abutment of the second flange 522 with the outer wall 41 of the laser amplification chamber 4 achieves the other seal, whereby, by these two seals, the sealing performance of the portion where the installed seed-source output optical fiber jumper 2 and seed-source optical fiber output port 3 pass through the passage hole 412 of the outer wall 41 of the laser amplification chamber 4 is improved.
In the seal assembly 5 for a laser, when the inner seal 51 and the outer seal 52 are assembled together, the sealing abutment of the second flange 522 of the outer seal 52 with the first flange 512 of the inner seal 51 achieves a seal, and the same applies to the case where the outside air enters between the second flange 522 and the outer wall 41 of the laser amplification chamber 4 from the post 513 of the inner seal 51 and the second housing 521 of the outer seal 52 at the fourth opening 521e of the second housing 521 of the outer seal 52, even if the outside air enters between the inner seal 51 and the outer seal 52 via the second flange 522 and the outer wall 41 of the laser amplification chamber 4, the entering air is redirected 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 chamber 4 (i.e., based on the principle of force minimisation), and in this case, when the outside air cannot enter from the post 513 of the inner seal 51 and the second housing 521 of the outer seal 52, but also the outside air can enter between the second flange 522 and the outer wall 41 of the laser amplification chamber 4 via the principle of the pressure drop between the first and the outer wall 41 of the laser amplification chamber 4, and the optical fiber source of the laser amplification chamber 4 is still not being able to enter the point of the laser amplification chamber 2, and the point of the principle of the pressure drop between the two laser amplification chamber 4, and the laser amplification chamber, and the point of the maximum pressure drop, is reached, and the point of the pressure drop, and the pressure drop.
In the sealing assembly 5 for a laser, when the inner seal member 51 and the outer seal member 52 are assembled together and assembled with the seed-source output optical fiber jumper 2 and the seed-source optical fiber output port 3 connected, the protrusion 513 of the inner seal member 51 forms a seal with the seed-source output optical fiber jumper 2 penetrating the through hole 513 a.
In the sealing assembly 5 for a laser, when the inner seal member 51 and the outer seal member 52 are assembled together, an accommodation space is formed between the first case 511 and the second case 521, sealing contact is formed between the protruding post 513 of the seal member 51 and the seed source output optical fiber jumper wire 2 penetrating through the through hole 513a, and especially when both are made of rubber materials capable of elastically expanding and contracting, the rubber materials themselves and the accommodation space can be very well adapted to buffering and releasing under external impact (such as stress or vibration), and the inner seal member 51 and the outer seal member 52 realize an integrally long external impact buffering path through the protruding post 513, thereby enabling the external impact to be very effectively buffered and released, and improving the stability and durability of the seal.
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 diameter of the stud 513 of the inner seal 51 and the fourth opening 521e of the second housing 521 of the outer seal 52 can be sealed directly by an interference fit. In particular, when the inner seal member 51 and the outer seal member 52 are each made of a rubber material capable of elastically expanding and contracting, 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 perforations 522a penetrating in the axial direction D, and a shortest radial distance from the periphery of each perforation 522a to the center of the second housing 521 is greater than a maximum radial distance from the outer edge of the first flange 512 to the center of the first housing 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 located radially outside the first flange 512 of the inner seal 51; the sealing assembly 5 for a laser further comprises a plurality of screws 53, each screw 53 being adapted to pass through a corresponding through hole 522a and to be screwed with a screw hole 411 in 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 seal 52 to the outer wall 41 of the laser amplification chamber 4 and to seal between the first flange 512 of the inner seal 51 and the outer wall 41 of the laser amplification chamber 4 of the solid-state laser 100. The removable mounting of the outer seal 52 is achieved by the provision of screws 53. Of course, in an alternative embodiment, the second flange 522 of the outer seal 52 is non-detachably mounted with the outer wall 41 of the laser amplification chamber 4 in an adhesive form.
Referring to fig. 2 and 6, the sealing assembly 5 for a laser further includes a locking member 54, and the locking member 54 locks the first post 513 and the seed-source output optical fiber jumper 2 from the outside so that a seal is formed between the first post 513 and the seed-source output optical fiber jumper 2 in the radial direction and the circumferential direction when the seed-source output optical fiber jumper 2 and the seed-source optical fiber output port 3 assembled and connected together by the inner sealing member 51 and the outer sealing member 52 pass through the through hole 513a of the post 513 of the inner sealing member 51 and the first cavity 511a of the first housing 511 of the inner sealing member 51.
As shown in fig. 6, in an example, the locking member 54 includes a clamping portion 541, two protruding portions 542, and a screw 543; the sandwiching portion 541 is for sandwiching the protruding column 513 of the inner seal 51 from the outside in the circumferential direction; two protruding portions 542 protrude radially outward from both ends of the clip 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 screw with the threaded hole through the via hole to connect the two protruding portions 542 together and to press the clamping portion 541 against the protruding post 513 of the inner seal member 51 to deform the protruding post 513 of the inner seal member 51, so that a seal is formed between the first protruding post 513 and the seed-source output optical fiber jumper 2 in the radial direction and the circumferential direction. The screw 543 can adjust the force of pressing the column 513 of the inner seal 51, and can enhance the sealing property between the first column 513 and the seed-source output optical fiber jumper 2. In particular, when the inner seal member 51 is made of a rubber material capable of elastic expansion and contraction, the sealing performance is further improved.
As shown in fig. 6, the clamping portion 541 of the lock member 54 is provided with a plurality of slits 541a, the plurality of slits 541a being spaced apart from each other in the circumferential direction; each slit 541a extends in the axial direction D, is closed at both ends in the axial direction D, and penetrates the sandwiching portion 541 in the radial direction. The provision of slots 541a facilitates more convenient and more compliant wrapping of the wrapping clip 541 over the post 513 of the inner seal 51. In addition, the slots 541a provide a buffer release space upon external impact, and especially when a plurality of slots 541a are provided, buffer release of 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 sealing assembly 5 for a laser is not limited to application to the solid state laser 100, but may be applied to any suitable laser.
The various exemplary embodiments are described using the above detailed description, but are not intended to be limited to the combinations explicitly disclosed herein. Thus, unless otherwise indicated, the various features disclosed herein may be combined together to form a number of additional combinations that are not shown for the sake of brevity.
Claims (10)
1. A seal assembly (5) for a laser, characterized by comprising an inner seal (51) and an outer seal (52),
The inner seal (51) is a single piece, the inner seal (51) comprises a first housing (511), a first flange (512) and a stud (513),
The first housing (511) has a first cavity (511 a) and opposite first (511 b) and second (511 c) ends in an axial direction (D), the first housing (511) having a first opening (511D) at the first end (511 b) and a second opening (511 e) at the second end (511 c), the first opening (511D) having a diameter larger than the second opening (511 e),
A first flange (512) integrally protruding radially outwards from a periphery at a first end (511 b) of the first housing (511), the first flange (512) being for sealingly bearing against an outer wall (41) of a laser amplification cavity (4) of the solid state laser (100) in an axial direction (D);
The protruding column (513) integrally protrudes outwards from the end wall at the second end (511 c) of the first shell (511) in the axial direction (D), the protruding column (513) is provided with a through hole (513 a) penetrating through the protruding column (513) in the axial direction (D), the through hole (513 a) is communicated with a second opening (511 e) of the first shell (511), the through hole (513 a), the second opening (511 e) and the first cavity (511 a) 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 then penetrate through the outer wall (41) of a laser amplifying cavity (4) of the solid laser (100) to enter the interior of the laser amplifying cavity (4);
the outer seal (52) is a single piece, the outer seal (52) includes a second housing (521) and a second flange (522),
The second housing (521) has a second cavity (521 a) and opposite third (521 b) and fourth (521 c) ends along an axial direction (D), the second housing (521) has a third opening (521D) at the third end (521 b) and a fourth opening (521 e) at the fourth end (521 c), the third opening (521D) has a diameter larger than the fourth opening (521 e), the second housing (521) is adapted to fit over the first housing (511) along the axial direction (D), and the fourth opening (521 e) is adapted to allow the protruding stud (513) of the inner seal (51) to protrude out;
A second flange (522) integrally protruding radially outwardly from the periphery at the third end (521 b) 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),
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 (521 e) of the second housing (521) of the outer seal (52), and the second flange (522) of the outer seal (52) and the first flange (512) of the inner seal (51) form a seal;
When the inner seal (51) and the outer seal (52) are assembled together and assembled with the connected seed source output optical fiber jumper (2) and seed source optical fiber output port (3), a seal is formed between the stud (513) of the inner seal (51) and the seed source output optical fiber jumper (2) penetrating the through hole (513 a).
2. The sealing assembly (5) for a laser according to claim 1, characterized in that,
The inner seal (51) is a rubber seal.
3. The sealing assembly (5) for a laser according to claim 2, characterized in that,
The outer diameter of the stud (513) of the inner seal (51) is greater than the diameter of the fourth opening (521 e) of the second housing (521) of the outer seal (52).
4. The sealing assembly (5) for a laser according to claim 1 or 2, characterized in that,
The second flange 522 of the outer seal 52 is provided with a plurality of perforations 522a penetrating in the axial direction D,
The shortest radial distance of the periphery of each perforation (522 a) from the center of the second housing (521) is greater than the maximum radial distance of the outer edge of the first flange (512) from the center of the first housing (511) such that when the inner seal (51) and the outer seal (52) are assembled together, the plurality of perforations (522 a) of the outer seal (52) are located radially outside the first flange (512) of the inner seal (51);
the sealing assembly (5) for a laser further comprises a plurality of screws (53), each screw (53) being adapted to pass through a corresponding through hole (522 a) and to be screwed with 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 seal (52) to the outer wall (41) of the laser amplification chamber (4) of the solid-state laser (100) and to seal between the first flange (512) of the inner seal (51) and the outer wall (41) of the laser amplification chamber (4) of the solid-state laser (100).
5. The sealing assembly (5) for a laser according to claim 1, characterized in that,
The sealing assembly (5) for the laser also comprises a locking piece (54),
The locking member (54) is used when the seed source output optical fiber jumper (2) and the seed source optical fiber output port (3) assembled together and connected by the inner sealing member (51) and the outer sealing member (52) pass through the through hole (513 a) of the protruding column (513) of the inner sealing member (51) and the first cavity (511 a) of the first shell (511) of the inner sealing member (51), and locks the first protruding column (513) and the seed source output optical fiber jumper (2) from the outside so that a seal is formed between the first protruding column (513) and the seed source output optical fiber jumper (2) in the radial direction and the circumferential direction.
6. The sealing assembly (5) for a laser according to claim 5, characterized in that,
The outer seal (52) is a rubber seal.
7. The sealing assembly (5) for a laser according to claim 6, characterized in that,
The hardness of the outer seal (52) is greater than the hardness of the inner seal (51).
8. The sealing assembly (5) for a laser according to claim 5, characterized in that,
The locking piece (54) comprises a clamping part (541), two protruding parts (542) and a screw (543);
the clamping part (541) is used for clamping the protruding column (513) of the inner sealing member (51) from the outside along the circumferential direction;
Two protruding parts (542) protrude outwards from 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 being screwed with the threaded hole through the through hole so as to connect the two protruding parts (542) together and enable the clamping part (541) to press the protruding column (513) of the inner sealing piece (51) to deform the protruding column (513) of the inner sealing piece (51), and therefore a seal is formed between the first protruding column (513) and the seed source output optical fiber jumper wire (2) in the radial direction and the circumferential direction.
9. The sealing assembly (5) for a laser according to claim 8, wherein,
The clamping part (541) of the locking member (54) is provided with a plurality of slots (541 a), and the plurality of slots (541 a) are circumferentially spaced apart from each other;
each slot 541a extends in the axial direction D, is closed at both ends in the axial direction D, and penetrates the sandwiching portion 541 in the radial direction.
10. A solid state laser (100) characterized by comprising a seed source optical path 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 sealing assembly (5) for a laser according to any of claims 1-9;
The outer wall (41) of the laser amplification cavity (4) is provided with a through hole (412), the first housing (511) of the inner seal (51) of the sealing assembly (5) for the laser covers the through hole (412) along the axial direction (D), the through hole (513 a) of the protruding column (513) of the inner seal (51) is aligned with the through hole (412) along the axial direction (D), so that the seed source output optical fiber jumper (2) and the seed source optical fiber output port (3) which are connected together penetrate through the through hole (513 a) of the protruding column (513) of the inner seal (51) and the first cavity (511 a) of the first housing (511) of the inner seal (51), and the through hole (412) of the outer wall (41) of the laser amplification cavity (4) and enter the laser amplification cavity (4).
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| CN110518449A (en) * | 2019-09-04 | 2019-11-29 | 杭州奥创光子技术有限公司 | A kind of encapsulating structure improving SESAM all -fiber mode-locked laser reliability of oscillator |
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| JP3433732B2 (en) * | 2000-11-22 | 2003-08-04 | 住友電気工業株式会社 | Optical semiconductor hermetically sealed container, optical semiconductor module and optical fiber amplifier |
| RU2670584C1 (en) * | 2014-02-03 | 2018-10-23 | Айпиджи Фотоникс Корпорэйшн | High-energy fiber laser, generating supershort pulses |
| JP7033068B2 (en) * | 2016-09-05 | 2022-03-09 | 古河電気工業株式会社 | Laser device and light source device |
| KR102129919B1 (en) * | 2018-12-05 | 2020-07-03 | 주식회사 이오테크닉스 | Cooling module for optical fiber laser and optical fiber laser device including the cooling module |
| CN109818250B (en) * | 2019-02-19 | 2019-12-20 | 武汉安扬激光技术有限责任公司 | All-fiber sealed packaging structure and packaging method of semiconductor saturable absorption mirror |
| CN111029891A (en) * | 2020-01-10 | 2020-04-17 | 华东师范大学重庆研究院 | A laser gain fiber cooling device |
| CN112864788A (en) * | 2021-03-17 | 2021-05-28 | 深圳技术大学 | SESAM packaging structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105870767A (en) * | 2016-05-03 | 2016-08-17 | 中电科天之星激光技术（上海）有限公司 | Light direction adjustable optical fiber output laser generator |
| CN110518449A (en) * | 2019-09-04 | 2019-11-29 | 杭州奥创光子技术有限公司 | A kind of encapsulating structure improving SESAM all -fiber mode-locked laser reliability of oscillator |
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