CN219477227U - Pump power transmission tail fiber and high-power fiber laser comprising same - Google Patents
Pump power transmission tail fiber and high-power fiber laser comprising same Download PDFInfo
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- CN219477227U CN219477227U CN202320141503.5U CN202320141503U CN219477227U CN 219477227 U CN219477227 U CN 219477227U CN 202320141503 U CN202320141503 U CN 202320141503U CN 219477227 U CN219477227 U CN 219477227U
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Abstract
The utility model discloses a pumping power transmission pigtail and a high-power optical fiber laser comprising the same, belonging to the field of optical devices, comprising a ferrule and an optical fiber comprising a first optical fiber section and a second optical fiber section, wherein the first optical fiber section passes through a ceramic part of the ferrule and penetrates out from the end part of the ferrule, and a coating inclined plane is arranged at the end part of the ferrule; meanwhile, the second optical fiber section, the shrinkage tube and the ferrule metal tail handle are fixed through the combination of the shrinkage tube and the shadowless glue, so that the reliable arrangement of the tail fiber is realized. The pump power transmission pigtail has a simple structure, is convenient to assemble, can effectively improve the reliability and stability of the use of the pigtail, reduces the influence of return light on the service life of a pump source, effectively avoids the cracking of a film layer of the existing pigtail caused by the difference of thermal expansion among a ceramic surface, a glue layer and an optical fiber, avoids the failure condition of a manufacturing process, ensures the use accuracy and reliability of the pigtail, the pump source and even a laser, and has good practical value and application prospect.
Description
Technical Field
The utility model belongs to the field of optical devices, and particularly relates to a pumping power transmission tail fiber and a high-power fiber laser comprising the same.
Background
With the wide application of special optical fibers and related devices, the market of industrial optical fiber lasers is vigorously developed, and the industrial optical fiber lasers are widely applied to the fields of automobile manufacturing, medical treatment, communication, national defense and the like. With the trend of domestic fiber laser market competition and the gradual penetration of domestic substitution, the fiber laser market has fully entered a price competition stage; the continuous rise of power and the continuous decrease of cost are becoming important means for industrial fiber laser manufacturers to participate in market competition.
In general, a high-power laser is realized by combining a plurality of semiconductor lasers, and is used as a pump source of an energy output core source, and the aim of energy output is generally achieved by carrying out collimation, coupling and packaging with a coated optical fiber. In the whole laser, the pump source has the characteristics of large use quantity and high cost ratio, and the coupling packaging production process of the pump source also often has the difficulties of large technical difficulty, high component loss and the like, so that the pump source becomes an important subject to be improved.
In the pump source packaging process, manufacturers generally need to attempt to repeatedly adjust coupling parameters of each lens and other components so as to ensure realization of each performance index of the optical fiber coupling module. Wherein, the coated optical fiber belongs to a lightweight vulnerable component, and the problems of damage, breakage, pollution and the like are easy to occur in the processes of taking, debugging and the like; on the other hand, because the optical fiber product has no effective positioning structural member, the assembly and fixation links have the problems of low efficiency, difficult realization of an automatic coupling process and the like, and finally the increase of the production working hour cost of the pump source influences the economic application of the pump source and even the laser, and the method has certain limitation.
Disclosure of Invention
Aiming at one or more of the defects or improvement demands in the prior art, the utility model provides a pumping power transmission pigtail and a high-power fiber laser comprising the same, which can simplify the assembly process of the pigtail for a pumping source, ensure the reliability and stability of the application of the pigtail and reduce the loss of components.
In order to achieve the above object, according to one aspect of the present utility model, there is provided a pump power transmission pigtail including an optical fiber and a ferrule disposed at an end of the optical fiber;
the optical fiber comprises a first optical fiber section and a second optical fiber section which are coaxially and continuously arranged; the first optical fiber section is obtained by stripping a coating layer from the second optical fiber section, an inclined surface is formed by grinding the end part of the first optical fiber section, which is away from the second optical fiber section, and a coating layer is arranged on the inclined surface;
the insert core comprises a ceramic part and a metal tail handle which are assembled and connected, the middle parts of the ceramic part and the metal tail handle are coaxially provided with through holes, and a tightening pipe with the end part protruding out of the metal tail handle is arranged in the through holes of the metal tail handle; the first optical fiber section sequentially passes through the compaction tube and the through hole in the middle of the ceramic part and passes out from one end of the ceramic part, which is away from the metal tail handle;
one end of the first optical fiber section, which is away from the coating inclined plane, extends out of the shrink tube; and the junction of the second optical fiber section and the tightening pipe and the junction of the tightening pipe and the metal tail handle are respectively fixed through shadowless glue.
As a further improvement of the utility model, a horn mouth is arranged at the end part of the ceramic part connected with the metal tail handle and corresponds to the through hole in the middle of the ceramic part, and the end part of the second optical fiber section and the end part of the constriction tube respectively extend into the horn mouth.
As a further improvement of the present utility model, an inner diameter of the through hole in the middle of the ceramic portion is between an outer diameter of the first optical fiber section and an outer diameter of the second optical fiber section, and an end of the second optical fiber section abuts against an inner peripheral wall surface of the bell mouth.
As a further improvement of the utility model, the length of the first optical fiber section extending out of the ceramic part is 2 mm-8 mm;
and/or
The length of the first optical fiber section is 12 mm-18 mm.
As a further improvement of the utility model, the inclination angle of the inclined plane is 5-10 degrees.
As a further improvement of the utility model, the coating layer comprises Ta positioned in the inner layer 2 O 5 Layer and SiO on the surface layer 2 A layer.
As a further improvement of the utility model, the thickness of the coating layer is 180 mm-300 mm;
and/or
The Ta is 2 O 5 The thickness of the layer is 30 nm-60 nm, the SiO 2 The thickness of the layer is 150 nm-250 nm.
As a further improvement of the utility model, the middle part of the metal tail handle is provided with a step through hole, and the step through hole comprises a large-diameter end and a small-diameter end;
one end of the ceramic part is embedded into the large-diameter end in an interference fit mode, and one end of the tightening pipe extends into the small-diameter end.
As a further improvement of the present utility model, the length of the optical fiber is 2m to 2.5m, and the end of the second optical fiber section extending out of the shrink tube is housed by being wound into a ring.
In another aspect of the present utility model, a high power fiber laser is provided, which includes at least one pump power transmission pigtail.
The above-mentioned improved technical features can be combined with each other as long as they do not collide with each other.
In general, the above technical solutions conceived by the present utility model have the beneficial effects compared with the prior art including:
(1) The utility model relates to a pumping power transmission tail fiber, which comprises a ferrule and an optical fiber comprising a first optical fiber section and a second optical fiber section, wherein the first optical fiber section passes through a ceramic part of the ferrule and passes out from the end part of the ferrule, and a coating inclined plane is arranged at the end part of the ferrule; meanwhile, the second optical fiber section, the shrinkage tube and the metal tail handle of the ferrule are fixed through the combination of the shrinkage tube and the shadowless glue, so that the reliable arrangement of the tail fibers is realized; the method effectively avoids the cracking of the film layer and the process failure caused by the difference of the thermal expansion of the ceramic surface, the adhesive layer and the optical fiber in the high-power laser transmission process of the traditional tail fiber by only arranging the coating film at the end part of the first optical fiber section; meanwhile, the inclined plane is ground at the end part of the first optical fiber section, so that the influence of return light on the service life of the pump source can be effectively reduced, and the use reliability and accuracy of the pump source and the laser are ensured.
(2) According to the pump power transmission pigtail, the length of the first optical fiber section and the length of the first optical fiber section extending out of the ceramic part are preferably set, so that the structure of the transmission pigtail is further optimized; meanwhile, through the arrangement of the horn mouth at the end part of the ceramic part, the quick alignment of the end part of the second optical fiber section and the end part of the tight shrinkage tube is effectively realized, the quick alignment assembly of the first optical fiber section in the assembly process of the optical fiber and the ferrule is convenient, the fiber penetrating process in the assembly process of the pigtail is further simplified, and the yield of single pigtail products is improved.
(3) According to the pump power transmission tail fiber, through the arrangement of the two film layers in the film coating layer, reliable combination of the high refractive index material and the low refractive index material is realized, the influence of return light on the service life of a pump source is effectively reduced, and the transmission efficiency is improved to a certain extent.
(4) The pump power transmission tail fiber has a simple structure, is convenient to assemble, can effectively improve the reliability and stability of the tail fiber in use, reduces the influence of return light on the service life of a pump source, effectively avoids the cracking of a film layer caused by the difference of thermal expansion among a ceramic surface, a glue layer and an optical fiber in the existing tail fiber, avoids the failure condition of a manufacturing process, ensures the accuracy and reliability of the tail fiber, the pump source and even a laser in use, and has good practical value and application prospect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a pump power transmission pigtail in an embodiment of the present utility model;
FIG. 2 is a perspective view of a pump power transmission pigtail according to an embodiment of the present utility model;
like reference numerals denote like technical features throughout the drawings, in particular:
1. a core insert; 2. an optical fiber; 3. tightening the shrinkage tube; 4. a shadowless glue;
101. a ceramic part; 102. a metal tail handle; 201. a first optical fiber segment; 202. a second optical fiber segment; 203. and a coating layer.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Examples:
referring to fig. 1 to 2, a pump power transmission pigtail according to a preferred embodiment of the present utility model includes a ferrule 1 and an optical fiber 2, which are assembled and connected by a pinch tube 3 embedded in the ferrule 1.
Specifically, as shown in fig. 2, the ferrule 1 in the preferred embodiment includes a ceramic portion 101 and a metal tail 102, each of which is provided with a through hole in the middle thereof, and is coaxially assembled and connected such that the through holes of the two are coaxially disposed.
More specifically, in the preferred embodiment, the through hole in the middle of the metal shank 102 is a stepped hole, which includes a large diameter section corresponding to the outer diameter of the ceramic part 101 and a small diameter section corresponding to the outer diameter of the shrink tube 3. Wherein the ceramic portion 101 ends in the preferred embodiment are connected in an interference fit in the large diameter section of the metal shank 102, as shown in fig. 1. Correspondingly, the shrink tube 3 is sleeved on the periphery of the optical fiber 2 and correspondingly embedded in the small-diameter section of the metal tail handle 102.
In practice, the end of the ceramic part 101 that protrudes into the metal shank 102 is flared towards the through-hole in the ceramic part 101, so that the pinch tube 3 that protrudes into the metal shank 102 can be end-fitted into the flared, as shown in fig. 1.
Further, the optical fiber 2 in the preferred embodiment is a two-segment structure comprising a first fiber segment 201 and a second fiber segment 202. Wherein, first fiber segment 201 penetrates into ceramic portion 101, and its tip is worn out from the tip of ceramic portion 101 that deviates from metal tail 102, and the length of wearing out is preferably 2mm ~ 8mm, more preferably 3mm ~ 6mm. Meanwhile, the first optical fiber 201 in the preferred embodiment is obtained by stripping the coating layer from the second optical fiber 202, that is, the first optical fiber 201 includes an optical fiber glass core located in the middle and a glass cladding coated on the outer periphery thereof. Accordingly, for the second fiber segment 202, it includes a fiber glass core, a glass cladding, and a coating layer disposed sequentially from inside to outside, which in a preferred embodiment is further preferably an epoxy coating layer.
In more detail, the length of the first optical fiber segment 201 in the preferred embodiment is preferably 12mm to 18mm, and more preferably 13mm to 16mm, which is generally determined by the length of the first optical fiber segment 201 extending out of the ceramic portion 101 and the length of the ceramic portion 101 itself.
Further, the end surface of the first optical fiber segment 201 extending out of the ceramic portion 101 is ground to a slope having an inclination angle of 5 ° to 10 °, more preferably 6 ° to 8 °, and in a specific embodiment is specifically set to 7 ° with respect to the radial end surface of the optical fiber. In actual setting, the end face polishing of the first optical fiber segment 201 is preferably performed before the stripping of the coating layer thereof.
In more detail, the coating layer 203 is provided on the polished inclined surface, and in a preferred embodiment, the thickness of the coating layer 203 is preferably 180nm to 300nm, and it is further preferably a bilayer structure including Ta in the inner layer 2 O 5 Layer and SiO on the surface layer 2 The former is a high refractive index material, the thickness of the coating is preferably 30 nm-60 nm, and the latter is a low refractive index material, and the thickness of the coating is preferably 150 nm-250 nm. In the specific arrangement, the two layers of coating films are preferably arranged in a sequential evaporation mode.
As shown in fig. 1, a second fiber segment 202 in the preferred embodiment is disposed through the shrink tubing 3 with one end of the first fiber segment 201 attached thereto extending from the shrink tubing 3 and into the flare at the end of the ceramic portion 101, as shown in fig. 1. In practical arrangement, the inner diameter of the through hole in the middle of the ceramic portion 101 is preferably smaller than the outer diameter of the second optical fiber section 202, so that the end of the second optical fiber section 202 can be limited by abutting against the inner wall surface of the bell mouth. Accordingly, the other end of the second optical fiber 202 protrudes from the other end of the shrink tube 3.
More specifically, the length of the pinch tube 3 in the preferred embodiment is preferably greater than the length of the small diameter section of the metal tail shank 102 such that one end of the pinch tube 3 may extend from the small diameter section and abut the inner wall surface of the flare. At the same time, the other end of the pinch tube 3 protrudes beyond the end of the metal tail 102 facing away from the ceramic portion 101, as shown in fig. 1.
In actual setting, the second optical fiber section 202 and the shrink tube 3, and the shrink tube 3 and the metal tail handle 102 are fixed by the shadowless glue 4. In a preferred embodiment, the shadowless glue 4 used is preferably a photo-curable shadowless glue, which is cured after the application setup by irradiation with a light source in the corresponding wavelength range.
Preferably, in one embodiment, the shadowless glue 4 is an ultraviolet shadowless glue, which can be cured by irradiation with an ultraviolet light source in the range of 365-400 nm for a certain time (e.g. 60 s).
In more detail, in the actual setting, the shadowless glue 4 is provided at the interface of the end of the pinch tube 3 facing away from the ceramic portion 101 and the second optical fiber section 202 and the interface of the end of the pinch tube 3 facing away from the ceramic portion 101 and the metal pigtail 102, as shown in fig. 1. In order to improve the tightness of the arrangement of the first optical fiber segment 201, the outer peripheral wall surface of the pinch tube 3 in the preferred embodiment is preferably bonded to the inner peripheral wall surface of the small-diameter segment, and the outer peripheral wall surface of the second optical fiber segment 202 is preferably bonded to the inner peripheral wall surface of the pinch tube 3.
In practice, the length of the optical fiber 2 is preferably 2m to 2.5m, and the portion of the mating ferrule 1 and the crimp tube 3 extending beyond the ferrule 1, which is the second optical fiber segment 202, is removed, leaving a longer length. In order to ensure reliable accommodation of the second optical fiber segment 202 extending out of the end of the shrink tubing 3, it is preferable to coil the portion of the second optical fiber segment 202 in a ring shape of a certain size, for example, in a ring shape of 10cm, when actually installed.
For the pump power transmission pigtail in the preferred embodiment, the preparation process preferably comprises the following steps:
(1) Cutting optical fiber 2 with the corresponding length (2 m-2.5 m), and preparing corresponding ferrule 1, shrink tube 3 and shadowless glue 4 for standby;
(2) Grinding one end of the optical fiber 2, and forming an inclined end face with a certain inclined angle at one end of the optical fiber 2;
in practice, it is preferable to assemble the ceramic part 101 of the ferrule 1 with the metal stem 102 and fit the shrink tube 3 around the outer periphery of the optical fiber 2 before polishing. Correspondingly, the length of about 15cm is reserved to extend out of the shrinkage tube 3 for standby, and the rest departments are preferably coiled into a ring shape of 10 cm. Thereafter, the optical fiber 1 is placed on a corresponding polishing apparatus and tool to be fixed and a corresponding polishing process is completed.
In actual operation, the end grinding of the optical fiber 2 preferably undergoes the processes of rough grinding, fine grinding, polishing and the like until the end face of the optical fiber is ground to a corresponding inclined plane, at the moment, the ground end is cleaned, the ground inclined plane is detected, and the ground inclined plane is ensured to meet the design requirement;
(3) Performing coating stripping operation of the optical fiber 2 on the end with the inclined surface, so as to obtain a first optical fiber section 201 with a certain length;
in the preferred embodiment, a stripping device with a CCD amplifying screen and an automatic fixed length parameter setting function is adopted, after the coating layer of the optical fiber 2 is clamped, automatic knife edge engagement is carried out in a region to be stripped, and a high-precision-size coating heat stripping process of a region near the end is further carried out in a mode of clamping the optical fiber coating layer to move; successfully separating the epoxy coating layer from the cladding layer from the end face of the optical fiber which is grinded to the position of the required stripping length, and obtaining a first optical fiber section 201 with the corresponding length;
(4) Setting a coating layer 203 on the polished end inclined plane;
before the coating 203 is provided, a cleaning process of the beveled and first fiber segment 201 is preferably performed.
In a preferred embodiment, the glass core and cladding end faces and cladding cylindrical surfaces of the stripped region of the optical fiber 2 are wiped by using a surfactant, and then the cladding cylindrical surfaces of the stripped region are wiped secondarily by using absolute ethyl alcohol;
in another preferred embodiment, the first fiber section 201 may also be jet cleaned using dry clean nitrogen or air. After the cleaning process is completed, the cleaning effect of the outer circumferential surface of the first optical fiber segment 201 and the inclined surface is preferably checked.
After ensuring that the cleaning degree of the inclined plane to be coated meets the requirement, the optical fiber 2 is preferably placed into a coating fixture of a coating device, and evaporation of two film layers is sequentially completed in an electron beam evaporation and ion source assisted mode.
(5) Performing an assembly process of the optical fiber 2 and the ferrule 1, inserting the first optical fiber section 201 into the ferrule 1 from one end of the metal tail handle 102, enabling the end of the first optical fiber section 201 to extend out of the ceramic part 101 for a preset length, and inserting the shrink tube 3 into the metal tail handle 102;
during actual assembly, the shrink tube 3 is preferably slid to the end of the first optical fiber section 201, the end provided with the coating layer 203 can extend into the shrink tube 3 by 2 mm-3 mm, and then the optical fiber 2 and the shrink tube 3 are simultaneously extended into the metal tail handle 102, so that the first optical fiber section 201 can be protected in the process of extending into the metal tail handle 102, and the coaxial alignment of the first optical fiber section 201 and the through hole in the middle of the ceramic part 101 can be conveniently performed through the shrink tube 3, so that damage caused by the fact that the end is abutted against the inner wall surface of the bell mouth in the assembly process of the first optical fiber section 201 and the ferrule 1 is avoided.
(6) And (3) coating an shadowless glue 4 at the junction of the second optical fiber section 202 and the pinch tube 3 and the junction of the pinch tube 3 and the metal tail handle 102, and after the shadowless glue is solidified, realizing corresponding connection and fixation between all the components, and completing connection of the ferrule 1 and the optical fiber 2 to form the pumping power transmission tail fiber.
In another aspect of the utility model there is also provided a high power fibre laser in which at least one pump power delivery pigtail as shown in the foregoing is provided. Specifically, in actual setting, the transmission tail fiber is preferably packaged with a pump source to form a key component of the semiconductor laser; accordingly, the high power fiber laser in the preferred embodiment may be formed by an integrated arrangement of a plurality of semiconductor lasers with other components (e.g., housing, probe, etc.).
The pump power transmission pigtail has a simple structure, is convenient to assemble, can effectively improve the reliability and stability of the use of the pigtail, reduces the influence of return light on the service life of a pump source, effectively avoids the cracking of a film layer of the existing pigtail caused by the difference of thermal expansion among a ceramic surface, a glue layer and an optical fiber, avoids the failure condition of a manufacturing process, ensures the use accuracy and reliability of the pigtail, the pump source and even a laser, and has good practical value and application prospect.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the utility model and is not intended to limit the utility model, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
Claims (10)
1. The pump power transmission tail fiber is characterized by comprising an optical fiber and an inserting core arranged at the end part of the optical fiber;
the optical fiber comprises a first optical fiber section and a second optical fiber section which are coaxially and continuously arranged; the first optical fiber section is obtained by stripping a coating layer from the second optical fiber section, an inclined surface is formed by grinding the end part of the first optical fiber section, which is away from the second optical fiber section, and a coating layer is arranged on the inclined surface;
the insert core comprises a ceramic part and a metal tail handle which are assembled and connected, the middle parts of the ceramic part and the metal tail handle are coaxially provided with through holes, and a tightening pipe with the end part protruding out of the metal tail handle is arranged in the through holes of the metal tail handle; the first optical fiber section sequentially passes through the compaction tube and the through hole in the middle of the ceramic part and passes out from one end of the ceramic part, which is away from the metal tail handle;
one end of the first optical fiber section, which is away from the coating inclined plane, extends out of the shrink tube; and the junction of the second optical fiber section and the tightening pipe and the junction of the tightening pipe and the metal tail handle are respectively fixed through shadowless glue.
2. The pump power transmission pigtail according to claim 1, wherein the end portion of the ceramic portion connected to the metal pigtail is provided with a flare corresponding to the through hole in the middle of the ceramic portion, and the end portion of the second optical fiber segment and the end portion of the pinch tube extend into the flare respectively.
3. The pump power transmission pigtail of claim 2, wherein the inner diameter of the through hole in the middle of the ceramic portion is between the outer diameter of the first optical fiber segment and the outer diameter of the second optical fiber segment, and the end of the second optical fiber segment abuts against the inner peripheral wall surface of the bell mouth.
4. The pump power transmission pigtail of claim 1, wherein the length of the first fiber segment extending beyond the ceramic portion is 2mm to 8mm;
and/or
The length of the first optical fiber section is 12 mm-18 mm.
5. The pump power transmission pigtail according to any of claims 1 to 4, wherein the slope has an inclination of 5 ° to 10 °.
6. The pump power transmission pigtail of claim 5, wherein the coating layer comprises Ta at an inner layer 2 O 5 Layer and SiO on the surface layer 2 A layer.
7. The pump power transmission pigtail of claim 6, wherein the thickness of the coating layer is 180 mm-300 mm;
and/or
The Ta is 2 O 5 The thickness of the layer is 30 nm-60 nm, the SiO 2 The thickness of the layer is 150 nm-250 nm.
8. The pump power transmission pigtail according to any one of claims 1 to 4, 6 and 7, wherein a stepped through hole is formed in the middle of the metal pigtail, and the stepped through hole comprises a large-diameter end and a small-diameter end;
one end of the ceramic part is embedded into the large-diameter end in an interference fit mode, and one end of the tightening pipe extends into the small-diameter end.
9. The pump power transmission pigtail according to any one of claims 1 to 4, 6, 7, wherein the length of the optical fiber is 2m to 2.5m, and the end of the second optical fiber section extending out of the shrink tube is housed by winding it into a ring.
10. A high power fiber laser comprising at least one pump power delivery pigtail according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320141503.5U CN219477227U (en) | 2023-01-12 | 2023-01-12 | Pump power transmission tail fiber and high-power fiber laser comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320141503.5U CN219477227U (en) | 2023-01-12 | 2023-01-12 | Pump power transmission tail fiber and high-power fiber laser comprising same |
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| CN219477227U true CN219477227U (en) | 2023-08-04 |
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| CN202320141503.5U Active CN219477227U (en) | 2023-01-12 | 2023-01-12 | Pump power transmission tail fiber and high-power fiber laser comprising same |
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