CN117233895A - Optical fiber beam combining device - Google Patents
Optical fiber beam combining device Download PDFInfo
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- CN117233895A CN117233895A CN202210644619.0A CN202210644619A CN117233895A CN 117233895 A CN117233895 A CN 117233895A CN 202210644619 A CN202210644619 A CN 202210644619A CN 117233895 A CN117233895 A CN 117233895A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 139
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- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 8
- 239000011247 coating layer Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 12
- 239000003292 glue Substances 0.000 description 3
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- 238000012545 processing Methods 0.000 description 2
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- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010330 laser marking Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses an optical fiber beam combining device, which relates to the technical field of optical devices, and particularly relates to an optical fiber beam combining device. The optical fiber beam combining device utilizes the lens component and the optical fiber standard interface to shape and couple multiple light beams into one output optical fiber, reduces the difficulty of the optical fiber beam combining production and manufacturing process, and the beam combining device and the output optical fiber are connected by the optical fiber standard interface, so that the optical fiber beam combining device is convenient to detach and replace, and can reduce the production and maintenance cost.
Description
Technical Field
The invention relates to the technical field of optical devices, in particular to an optical fiber beam combining device.
Background
The fiber laser has the advantages of good beam quality, high efficiency, compact structure, high reliability and the like, and is rapidly developed in the fields of communication, machining, laser marking, medical treatment and the like. Along with the increasingly wide application fields of the optical fiber lasers, the requirements on the output power of the optical fiber lasers are higher, and the optical fiber beam combining device is one of the most direct and effective methods for improving the output power of the lasers.
At present, the manufacturing process of the optical fiber combining technology is mainly divided into a rotary tapering method and a sleeve method, wherein the rotary tapering method is to wind a plurality of optical fibers, heat the tapering to enable the optical fibers to be welded together, manufacture an optical fiber bundle, cut the optical fiber bundle at the thinnest place and weld the optical fiber bundle with an output optical fiber. The ferrule method is to thread a plurality of optical fibers into a quartz ferrule, fuse the ferrule and the optical fibers together by heating and tapering, then cut the same at the place where the optical fiber bundle is the finest, and fuse the same with the output optical fibers. Both the rotary tapering method and the sleeve method need tapering welding operation, but the tapering welding process has large control difficulty, and if the optical fiber is damaged in use, the optical fiber needs to be tidied and replaced or welded again, and the replacement difficulty is large and the cost is high.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an optical fiber beam combining device which can combine multiple optical fibers into one optical fiber, and each section of optical fiber can be plugged and replaced, so that the problems in the prior art are solved.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides an optic fibre beam combining device, includes beam combining lens subassembly, beam combining input optical fiber, output optical fiber, the one end joint of beam combining lens subassembly has input end optical fiber interface, the other end joint of beam combining lens subassembly has output end optical fiber interface, the equal fixed mounting of one end of input end optical fiber interface, output end optical fiber interface separation and reunion beam lens subassembly has the optic fibre carrier, the inside fixed mounting of input end optical fiber interface one end optic fibre carrier has beam combining input optical fiber, the inside fixed mounting of output end optical fiber carrier one end optical fiber carrier has output optical fiber, beam combining lens subassembly is including installation casing, first plano-convex lens, light beam compression lens, second plano-convex lens.
Preferably, the optical fiber carrier is a ceramic ferrule.
Preferably, the inner diameter value of the ceramic ferrule is 20-50 μm larger than the total diameter value of the combined input optical fiber after the coating layers are removed and densely arranged.
Preferably, the input end optical fiber interface and the output end optical fiber interface are FC optical fiber standard interfaces.
Preferably, the incident end of the output optical fiber is plated with an antireflection film.
Preferably, the first plano-convex lens, the beam compression lens and the second plano-convex lens are fixedly arranged in the installation shell, the first plano-convex lens, the beam compression lens and the second plano-convex lens are located on the same central axis, the beam compression lens is located between the first plano-convex lens and the second plano-convex lens, an incidence plane equivalent lens is arranged at one end, close to the first plano-convex lens, of the beam compression lens, and an output plane equivalent lens is arranged at one end, close to the second plano-convex lens, of the beam compression lens.
Preferably, the beam combination lens component is a coupling lens or a lens group, and the magnification M of the coupling lens or the lens group is less than or equal to the total diameter of the output optical fiber core diameter/the close-packed beam combination input optical fiber.
The invention provides an optical fiber beam combining device, which has the following beneficial effects:
1. the optical fiber beam combining device utilizes the lens component and the optical fiber standard interface to shape and couple multiple light beams into one output optical fiber, reduces the difficulty of the optical fiber beam combining production and manufacturing process, and the beam combining device and the output optical fiber are connected by the optical fiber standard interface, so that the optical fiber beam combining device is convenient to detach and replace, and can reduce the production and maintenance cost.
2. The optical fiber beam combining device can replace the components of the beam combining device according to the number of light sources required to be combined, thereby avoiding direct processing of the optical fibers and realizing free design of multi-light source beam combining.
Drawings
FIG. 1 is a schematic diagram of the input and output optical fibers of the present invention after connection;
fig. 2 is an equivalent light path diagram of the present invention.
In the figure: 1. a beam combining input optical fiber; 2. an input end optical fiber interface; 3. a first plano-convex lens; 4. a beam compression lens; 5. a second plano-convex lens; 6. an output optical fiber; 7. a beam combining lens assembly; 8. an output end optical fiber interface; 9. an incidence plane equivalent lens; 10. the output face is equivalent to a lens.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Example 1: referring to fig. 1 and 2, the present invention provides a technical solution: the utility model provides an optic fibre beam combining device, including beam combining lens assembly 7, beam combining input optical fiber 1, output optical fiber 6, the one end joint of beam combining lens assembly 7 has input optical fiber interface 2, the other end joint of beam combining lens assembly 7 has output optical fiber interface 8, input optical fiber interface 2, the one end that output optical fiber interface 8 far away from beam combining lens assembly 7 all fixed mounting has the optic fibre carrier, the inside fixed mounting of input optical fiber interface 2 one end optic fibre carrier has beam combining input optical fiber 1, the inside fixed mounting of output optical fiber interface 8 one end optic fibre carrier has output optical fiber 6, beam combining lens assembly 7 includes the installation casing, first plano-convex lens 3, beam compression lens 4, second plano-convex lens 5, can be as required beam combining's light source quantity, beam combining device part has been changed, the direct processing of optic fibre has been avoided, the free design of multi-source beam combining is realized.
The optical fiber carrier is a ceramic ferrule, and an FC interface matched with the input end optical fiber interface 2 and the output end optical fiber interface 8 is arranged on the ceramic ferrule.
The inner diameter value of the ceramic ferrule is 20-50 mu m larger than the total diameter value of the beam combination input optical fiber 1 after the coating layer is removed from close arrangement, the diameter value of the single optical fiber cladding is 125 mu m, the allowable error of the ceramic ferrule is 10-30 mu m, the stability of the multiple beam combination optical fibers after being installed is ensured, and the emergent end face of the beam combination input optical fiber 1 is positioned at the focus of the first plano-convex lens 3.
The input end optical fiber interface 2 and the output end optical fiber interface 8 are FC optical fiber standard interfaces, and the lens component and the optical fiber standard interfaces are utilized to shape and couple multiple light beams into one output optical fiber, so that the difficulty of the optical fiber beam combination production and manufacturing process is reduced.
The incident end of the output optical fiber 6 is coated with an antireflection film, and the incident end surface of the output optical fiber 6 is positioned at the focus of the second plano-convex lens 5.
The first plano-convex lens 3, the beam compression lens 4 and the second plano-convex lens 5 are fixedly arranged in the installation shell, interfaces matched with the input end optical fiber interface 2 and the output end optical fiber interface 8 are arranged at two ends of the installation shell, standard interface connection is used, disassembly and replacement are convenient, production and maintenance cost can be reduced, the first plano-convex lens 3, the beam compression lens 4 and the second plano-convex lens 5 are located on the same central axis, the beam compression lens 4 is located between the first plano-convex lens 3 and the second plano-convex lens 5, an incidence plane equivalent lens 9 is arranged at one end, close to the first plano-convex lens 3, of the beam compression lens 4, an output plane equivalent lens 10 is arranged at one end, close to the second plano-convex lens 5, of divergent light emitted by the beam combination input optical fiber 1 enters the beam compression lens 4 after being collimated by the first plano-convex lens 3, the beam compression lens 4 can reduce collimated beam compression, and the compressed beam is focused and converged on the end face of the output optical fiber 6 to complete beam combination.
The beam combination lens component 7 is a coupling lens or a lens group, and the magnification M of the coupling lens or the lens group is less than or equal to the core diameter of the output optical fiber/the total diameter of the closely arranged beam combination input optical fibers;
the compression ratio of the beam compression lens is > (F1. Times. TanNA 1)/(F2. Times. TanNA 2), wherein F1 and F2 are respectively the focal lengths of the first plano-convex lens and the second plano-convex lens, and NA1 and NA2 are respectively the numerical apertures of the beam-combining input optical fiber and the beam-combining output optical fiber;
the limiting purpose of the two constraints is to ensure that the laser light exiting the combined input optical fiber 1 is shaped by the beam combining lens assembly 7 and then enters the output optical fiber 6.
Example 2: the optical fiber beam combining device is configured as in embodiment 1, except that the input end optical fiber interface 2 and the output end optical fiber interface 8 can use other optical fiber standard interfaces, such as SMA905 and the like.
Example 3: an optical fiber beam combining device has a structure as in the embodiment 1, and is different in that a beam combining lens assembly 7 can be replaced by a single-chip coupling lens with the magnification M being smaller than or equal to the core diameter of an output optical fiber/the total diameter of a beam combining input optical fiber after close arrangement, and the emergent end face of the beam combining input optical fiber 1 and the incident end face of the output optical fiber 6 are respectively positioned on front and rear focuses of the coupling lens.
In combination, when the optical fiber beam combining device is used, a coating layer of 2-3cm is stripped from the output ends of a plurality of optical fibers to be combined, the plurality of optical fibers with the stripped coating layer penetrate into a ceramic ferrule with an FC interface, glue is used for fixing, the end face of the ceramic ferrule is inserted into an optical fiber interface 2 of an input end for fixing after grinding and polishing, antireflection films with designed wavelengths are plated on the surfaces of a first plano-convex lens 3, a beam compression lens 4, a second plano-convex lens 5 and the incident end of an output optical fiber 6, the first plano-convex lens 3, the beam compression lens 4 and the second plano-convex lens 5 are coaxially arranged in an installation shell and are fixed through optical glue, the centers of the lenses and the optical fiber ferrule are ensured to be on the same shaft, one end of the output optical fiber 6 is stripped of 2-3cm and then penetrates into the ceramic ferrule with the FC interface, the ceramic ferrule is fixed through glue after grinding and polishing the end face of the ceramic ferrule, divergent light of the optical fiber input optical fiber 1 enters the beam compression lens 4 after being collimated by the first plano-convex lens 3, and the collimated light beam 4 is compressed by the first plano-convex lens 4, and the light beam is focused by the second plano-convex lens 5 after being compressed, and the light beam is focused on the end face of the output optical fiber 5.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present invention; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an optic fibre beam combining device, includes beam combining lens subassembly (7), beam combining input optical fiber (1), output optical fiber (6), its characterized in that: the one end joint of beam combination lens subassembly (7) has input optic fibre interface (2), the other end joint of beam combination lens subassembly (7) has output optic fibre interface (8), the equal fixed mounting of one end of input optic fibre interface (2), output optic fibre interface (8) far away from beam combination lens subassembly (7) has the optical fiber carrier, the inside fixed mounting of input optic fibre interface (2) one end optical fiber carrier has beam combination input optic fibre (1), the inside fixed mounting of output optic fibre interface (8) one end optical fiber carrier has output optic fibre (6), beam combination lens subassembly (7) are including installation casing, first plano-convex lens (3), beam compression lens (4), second plano-convex lens (5).
2. The optical fiber combining device according to claim 1, wherein: the optical fiber carrier is a ceramic ferrule.
3. The optical fiber combining device according to claim 2, wherein: the inner diameter value of the ceramic ferrule is 20-50 mu m larger than the total diameter value of the beam-combined input optical fiber (1) after the coating layers are removed and densely arranged.
4. The optical fiber combining device according to claim 1, wherein: the input end optical fiber interface (2) and the output end optical fiber interface (8) are FC optical fiber standard interfaces.
5. The optical fiber combining device according to claim 1, wherein: the incident end of the output optical fiber (6) is plated with an antireflection film.
6. The optical fiber combining device according to claim 1, wherein: the light beam compression lens is characterized in that the first plano-convex lens (3), the light beam compression lens (4) and the second plano-convex lens (5) are fixedly arranged in the installation shell, the first plano-convex lens (3), the light beam compression lens (4) and the second plano-convex lens (5) are located on the same central axis, the light beam compression lens (4) is located between the first plano-convex lens (3) and the second plano-convex lens (5), an incidence plane equivalent lens (9) is arranged at one end, close to the first plano-convex lens (3), of the light beam compression lens (4), and an output plane equivalent lens (10) is arranged at one end, close to the second plano-convex lens (5).
7. The optical fiber combining device according to claim 1, wherein: the beam combination lens component (7) is a coupling lens or a lens group, and the magnification M of the coupling lens or the lens group is less than or equal to the total diameter of the output optical fiber core diameter/the close-packed beam combination input optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210644619.0A CN117233895A (en) | 2022-06-08 | 2022-06-08 | Optical fiber beam combining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210644619.0A CN117233895A (en) | 2022-06-08 | 2022-06-08 | Optical fiber beam combining device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117233895A true CN117233895A (en) | 2023-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210644619.0A Pending CN117233895A (en) | 2022-06-08 | 2022-06-08 | Optical fiber beam combining device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117233895A (en) |
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2022
- 2022-06-08 CN CN202210644619.0A patent/CN117233895A/en active Pending
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