CN213816730U - Optical fiber coupling device of laser - Google Patents
Optical fiber coupling device of laser Download PDFInfo
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- CN213816730U CN213816730U CN202023310612.0U CN202023310612U CN213816730U CN 213816730 U CN213816730 U CN 213816730U CN 202023310612 U CN202023310612 U CN 202023310612U CN 213816730 U CN213816730 U CN 213816730U
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Abstract
The utility model relates to the technical field of lasers, and provides a laser optical fiber coupling device, which comprises a first laser and a first prism component arranged along a first light path; a second laser and a second prism assembly disposed along a second optical path; the light-emitting paths of the first prism assembly and the second prism assembly are also provided with a first cemented prism and a first coupling lens, and laser beams generated by the first laser and the second laser form a first combined beam through the first cemented prism and then are emitted through the first coupling lens; the first prism assembly and the second prism assembly are both wedge prism assemblies, and each wedge prism assembly at least comprises two wedge prisms capable of rotating relatively. The utility model discloses a set up wedge prism subassembly and adjust laser beam to rectify laser beam's skew, effectively improved the precision that laser closed a bundle, improved and closed a bundle light quality.
Description
Technical Field
The utility model relates to a laser instrument technical field, more specifically say, relate to a laser instrument optical fiber coupling device.
Background
The semiconductor laser has the advantages of small volume, light weight, high reliability, long service life, low power consumption and the like, and is widely applied to various fields of national economy at present. The optical fiber laser is a laser using rare earth element doped glass optical fiber as a gain medium, and has a very wide application range, including laser optical fiber communication, military and national defense safety, medical equipment, industrial manufacturing and the like. The popularization and application of current lasers (such as semiconductor lasers and fiber lasers) are limited by the beam quality, so that the improvement of the beam quality, brightness and power of the lasers is the most important research direction.
Laser beam combining technology has been rapidly developed in recent years because of its ability to improve beam quality, increase output power, and increase power density. The laser beam combining technology combines a plurality of beams into one beam on the premise of ensuring that the beam quality is not changed, and the output power is improved by multiple times, so that high-brightness laser beam output is obtained. Common laser beam combining technologies include a spatial beam combining technology, a polarization beam combining technology, a wavelength beam combining technology, and the like, wherein the spatial beam combining technology is to arrange and stack a plurality of semiconductor lasers spatially according to a certain order to form a group of laser beams propagating along the same direction, so as to obtain high-power laser output.
However, when the existing laser is used for laser beam combination, the lasers are usually only mechanically combined together, the overall size is large, the laser beam combination precision is not high, and the quality of the obtained combined beam is not high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a laser instrument optical fiber coupling device to solve among the prior art laser and close the not high, the not high technical problem of beam combining light quality of acquisition of restrainting the precision.
In order to achieve the above object, the utility model adopts the following technical scheme: there is provided a laser fibre coupling device comprising:
a first laser and a first prism assembly disposed along a first optical path;
a second laser and a second prism assembly disposed along a second optical path;
the light-emitting paths of the first prism assembly and the second prism assembly are also provided with a first cemented prism and a first coupling lens, and laser beams generated by the first laser and the second laser form a first combined beam through the first cemented prism and then are emitted through the first coupling lens;
the first prism assembly and the second prism assembly are both wedge prism assemblies, and each wedge prism assembly at least comprises two wedge prisms capable of rotating relatively.
In one embodiment, the wedge prism assembly further comprises an optical wedge outer ferrule and an optical wedge inner ferrule, wherein the optical wedge inner ferrule is arranged inside the optical wedge outer ferrule and can rotate relative to the optical wedge outer ferrule;
the optical wedge outer ring and the optical wedge inner ring are both fixedly provided with at least one wedge-shaped prism.
In one embodiment, the wedge prism assembly comprises two wedge prisms, the inclined surfaces of the two wedge prisms are arranged oppositely, and the deviation angle of the wedge prism assembly to the laser beam is 0-3 degrees.
In one embodiment, the laser fiber coupling apparatus further comprises:
the first beam shaping lens group is arranged on the first light path and is positioned between the first prism assembly and the first cemented prism;
and the second beam shaping lens group is arranged on the second light path and is positioned between the second prism assembly and the first cemented prism.
In one embodiment, the first beam shaping lens group comprises a first plano-concave cylindrical lens and a first plano-convex cylindrical lens disposed between the first prism assembly and the first cemented prism, and the second beam shaping lens group comprises a second plano-concave cylindrical lens and a second plano-convex cylindrical lens disposed between the second prism assembly and the first cemented prism;
the axis of the first plano-concave cylindrical lens deflects a first preset angle relative to the axis of the second plano-concave cylindrical lens, and the axis of the first plano-convex cylindrical lens deflects a second preset angle relative to the axis of the second plano-convex cylindrical lens.
In one embodiment, the laser fiber coupling apparatus further comprises:
the prism system comprises a third laser and a third prism assembly arranged along a third light path, a fourth laser and a fourth prism assembly arranged along a fourth light path, and rhombic prisms are further arranged on light emitting paths of the third prism assembly and the fourth prism assembly;
a fifth laser and a fifth prism assembly are arranged along a fifth light path, and a second cemented prism and a second coupling lens are further arranged on light emitting paths of the fourth prism assembly and the fifth prism assembly;
laser beams of the third laser and the fourth laser form intermediate combined beam light through the rhombic prism and then enter the second cemented prism, and the intermediate combined beam light and the laser beam of the fifth laser form second combined beam light through the second cemented prism and then are emitted through the second coupling lens;
the third prism assembly, the fourth prism assembly and the fifth prism assembly are the wedge prism assembly.
In one embodiment, the beam fast axes of the first laser and the second laser are perpendicular to each other;
and/or the presence of a gas in the gas,
the fast axes of the light beams of the third laser and the fourth laser are parallel to each other, and the fast axes of the light beams of the fourth laser and the fifth laser are perpendicular to each other.
In one embodiment, the laser fiber coupling apparatus further comprises:
a laser base;
the laser heat sink is arranged in the laser base;
the first pressing plate is arranged in the laser base, and the first laser and the second laser are fixed in the laser heat sink through the first pressing plate;
the second pressing plate is arranged in the laser base, and the third laser, the fourth laser and the fifth laser are fixed in the laser heat sink through the second pressing plate;
the first coupling lens is fixedly arranged on the first lens mounting seat;
the second coupling lens is fixedly arranged on the second lens mounting seat;
the first optical fiber connecting piece is connected with the laser base and corresponds to the light emitting path of the first combined beam light;
and the second optical fiber connecting piece is connected with the laser base and corresponds to the light emitting path of the second combined beam light.
In one embodiment, at least one of the incident surface and the emergent surface of the rhombic prism is plated with an antireflection film;
and/or the presence of a gas in the gas,
the first cemented prism and the second cemented prism are both formed by cementing a total reflection prism and an oblique square prism.
In one embodiment, the first laser and the second laser are both blue lasers, and the third laser, the fourth laser, and the fifth laser are all green lasers.
The utility model provides a laser instrument optical fiber coupling device's beneficial effect lies in at least: when the laser generates and outputs a laser beam, the output beam may deviate from the optical axis, and when the existing laser performs the laser beam, the two lasers are usually only mechanically combined together, and the deviation of the laser beam generated by each laser is not corrected, so that the laser beam combining precision is not high, and the beam combining light quality is low. The utility model discloses the skew condition when fully having considered the laser instrument and producing laser beam has set up first prism subassembly and second prism subassembly respectively in first light path and second light path, adjust the laser beam's that first laser instrument and second laser instrument produced emergence angle through two at least wedge prism, with the skew of correction laser beam, the precision that laser closed the bundle has effectively been improved, the light quality of beam combination has been improved, satisfy the requirement of different fields to laser quality, good application prospect has.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of a light path structure of a laser fiber coupling device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a light path structure of a laser fiber coupling device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a laser fiber coupling device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a wedge prism assembly in a laser fiber coupling device according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional structural diagram of a wedge prism assembly in a laser fiber coupling device according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
Referring to fig. 1, the present embodiment provides a laser fiber coupling device, which includes a first laser 11 and a first prism assembly 12 disposed along a first optical path 10, and a second laser 21 and a second prism assembly 22 disposed along a second optical path 20. The light-emitting paths of the first prism assembly 12 and the second prism assembly 22 are further provided with a first cemented prism 13 and a first coupling lens 14, and laser beams generated by the first laser 11 and the second laser 21 form a first combined beam through the first cemented prism 13 and then are emitted through the first coupling lens 14. The first prism assembly 12 and the second prism assembly 22 are each a wedge prism assembly comprising at least two relatively rotatable wedge prisms 121.
The first laser 11 and the second laser 21 may be semiconductor lasers or fiber lasers, and are not limited herein. A wedge prism is an optical device with tilted surfaces for beam steering deflection. At least one side of the wedge-shaped prism is an inclined surface, the light beam can be deflected to the thicker side, a certain angle of deviation can be carried out on an incident light path by using one wedge-shaped prism, and the wedge-shaped prism can be used as a deformation prism when two wedge-shaped prisms are used in combination, and can be used for correcting the laser beam. In this embodiment, the first prism assembly 12 combines at least two wedge prisms together, and can shift the laser beam generated by the first laser 11 to adjust the emitting angle of the laser beam, so that the laser beam is emitted to the first glue prism 13 along the first optical path 10. The second prism assembly 22 combines at least two wedge prisms together to shift the laser beam generated by the second laser 21 so as to adjust the emitting angle of the laser beam, so that the laser beam is emitted to the first glue prism 13 along the second optical path 20. The first cemented prism 13 is used to combine the laser beams of the first optical path 10 and the second optical path 20 to form a first combined beam. The first coupling lens 14 is used to focus the first combined beam of light so as to couple the first combined beam of light to the first laser output 101 for output through the optical fibre.
The laser fiber coupling device provided by the embodiment has the beneficial effects that: when the laser generates and outputs a laser beam, the output beam may deviate from the optical axis, and when the existing laser performs the laser beam, the two lasers are usually only mechanically combined together, and the deviation of the laser beam generated by each laser is not corrected, so that the laser beam combining precision is not high, and the beam combining light quality is low. In this embodiment, the deviation condition of the laser when generating the laser beam is fully considered, the first prism assembly 12 and the second prism assembly 22 are respectively arranged in the first optical path 10 and the second optical path 20, and the emitting angles of the laser beams generated by the first laser 11 and the second laser 12 are adjusted by at least two wedge prisms, so as to correct the deviation of the laser beams, thereby effectively improving the precision of the laser beam combination, improving the quality of the beam combination light, meeting the requirements of different fields on the laser quality, and having good application prospects.
Referring to fig. 4, further, the wedge prism assembly further includes an optical wedge outer ferrule 122 and an optical wedge inner ferrule 123, the optical wedge inner ferrule 123 is disposed inside the optical wedge outer ferrule 122 and can rotate relative to the optical wedge outer ferrule 122, and at least one wedge prism 121 is fixedly disposed on each of the optical wedge outer ferrule 122 and the optical wedge inner ferrule 123. In this embodiment, the number of the wedge prisms 121 is preferably two, and the wedge outer ferrule 122 and the wedge inner ferrule 123 fix one wedge prism 121, respectively. Referring to fig. 5, the optical wedge outer ring 122 and the optical wedge inner ring 123 are both provided with hollow cavities, and the wedge prism 121 is fixed in the hollow cavities of the optical wedge outer ring 122 and the optical wedge inner ring 123 by means of glue. The inclined planes of the two wedge prisms 121 are arranged oppositely, and considering that the offset angle of the laser beam generated by the laser is usually small, the inclined planes of the wedge prisms have a small inclination angle, so as to ensure that the offset angle of the wedge prism assembly to the laser beam is 0-3 degrees, and preferably 1 degree. It will be appreciated that through the relative rotation of the outer and inner wedge rings 122 and 123, the offset angle of the wedge prism assembly to the laser beam can be adjusted as required to correct the offset of the laser beams of different lasers.
Further, in order to facilitate the control of the relative rotation of the optical wedge outer ring 122 and the optical wedge inner ring 123, bosses are provided on the sidewalls of the optical wedge outer ring 122 and the optical wedge inner ring 123, so as to facilitate the rotation of an operator through the boss controller. Optionally, the side walls of the optical wedge outer ring 122 and the optical wedge inner ring 123 are provided with a plurality of bosses, and the plurality of bosses are arranged at equal intervals.
Referring to fig. 1, further, the laser fiber coupling device provided in this embodiment further includes a first beam shaping lens group 15 and a second beam shaping lens group 23, which are used to collimate the laser beam to obtain a collimated beam. The first beam shaping lens group 15 is arranged on the first light path 10 and is positioned between the first prism assembly 12 and the first cemented prism 13; a second beam shaping lens group 23 is disposed on the second optical path 20 and between the second prism assembly 22 and the first cemented prism 13.
In one embodiment, the first beam shaping lens group 15 includes a first plano-concave cylindrical lens 151 and a first plano-convex cylindrical lens 152 disposed between the first prism assembly 12 and the first cemented prism 13, and the second beam shaping lens group 23 includes a second plano-concave cylindrical lens 231 and a second plano-convex cylindrical lens 232 disposed between the second prism assembly 22 and the first cemented prism 13. The plano-concave cylindrical lens and the plano-convex cylindrical lens are cylindrical lenses, and the cylindrical lenses are aspheric lenses and have positive focal power and are used for shaping laser beams and reducing spherical aberration. In this embodiment, the first plano-concave cylindrical lens 151 and the first plano-convex cylindrical lens 152 are sequentially disposed on the first optical path 10, and the plane of the first plano-concave cylindrical lens 151 faces the first prism assembly 12, and the plane of the first plano-convex cylindrical lens 152 faces the first plano-concave cylindrical lens 151, so as to ensure that the laser beam of the first laser 11 sequentially enters the planes of the first plano-concave cylindrical lens 151 and the first plano-convex cylindrical lens 152. The second plano-concave cylindrical lens 231 and the second plano-convex cylindrical lens 232 are sequentially disposed on the second optical path 20, the plane of the second plano-concave cylindrical lens 231 faces the second prism assembly 22, and the plane of the second plano-convex cylindrical lens 232 faces the second plano-concave cylindrical lens 231, so as to ensure that the laser beam of the second laser 21 sequentially enters the planes of the second plano-concave cylindrical lens 231 and the second plano-convex cylindrical lens 232.
In one embodiment, the axis of the first plano-concave cylindrical lens 151 is offset from the axis of the second plano-concave cylindrical lens 231 by a first preset angle, and the first preset angle is in a range of 0 to 90 °, and may be, for example, 0 °, 15 °, 30 °, 45 °, 60 °, 75 °, 90 °, and the like. The axis of the first plano-convex cylindrical lens 152 deflects a second preset angle relative to the axis of the second plano-convex cylindrical lens 232, where the second preset angle is 0 to 90 °, and may be, for example, 0 °, 15 °, 30 °, 45 °, 60 °, 75 °, 90 °, and so on.
In one embodiment, in order to improve the beam combination quality of the laser beams, the beam fast axis of the first laser 11 and the beam fast axis of the second laser 21 are perpendicular to each other, and accordingly, the first plano-concave cylindrical lens 151 and the second plano-concave cylindrical lens 231 are perpendicular to each other, and the first plano-convex cylindrical lens 152 and the second plano-convex cylindrical lens 232 are perpendicular to each other, so that better laser beam shaping effect and beam combination quality can be obtained.
Referring to fig. 2, further, the laser fiber coupling device provided in this embodiment further includes: the third laser 31 and the third prism assembly 32 are arranged along the third light path 30, the fourth laser 41 and the fourth prism assembly 42 are arranged along the fourth light path 40, and the light-emitting paths of the third prism assembly 32 and the fourth prism assembly 42 are also provided with a rhombic prism 43. The fifth laser 51 and the fifth prism assembly 52 are arranged along the fifth light path 50, and the second cemented prism 44 and the second coupling lens 45 are also arranged on the light outgoing paths of the fourth prism assembly 42 and the fifth prism assembly 52. The laser beams of the third laser 31 and the fourth laser 41 form an intermediate beam combination through the rhombic prism 43 and then enter the second cemented prism 44, and the intermediate beam combination and the laser beam of the fifth laser 51 form a second beam combination through the second cemented prism 44 and then exit through the second coupling lens 45.
The third laser 31, the fourth laser 41, and the fifth laser 51 may be semiconductor lasers or fiber lasers, and are not limited herein. The third prism assembly 32, the fourth prism assembly 42 and the fifth prism assembly 52 are all wedge prism assemblies, which can shift the laser beam to adjust the emitting angle of the laser beam, thereby realizing the correction of the laser beam. The rhombic prism 43 is used for combining the laser beams of the third laser 31 and the fourth laser 41, and at least one of the incident surface and the emitting surface of the rhombic prism is coated with an antireflection film, for example, only the incident surface or the emitting surface can be coated with an antireflection film, or both the incident surface and the emitting surface can be coated with an antireflection film, so that the loss of the laser beams passing through the rhombic prism 43 is reduced. The second cemented prism 44 is used to combine the laser beams of the fourth optical path 40 and the fifth optical path 50 to form a second combined beam. The second coupling lens 45 is used to focus the second combined beam of light so that it is coupled to the second laser output 401 for output through the optical fiber.
In one embodiment, the first and second cemented prisms 13 and 44 are formed by cementing a total reflection prism and an oblique prism, and beam loss can be reduced while ensuring effective beam combination of laser beams. The total reflection prism is a prism with the cross section of an isosceles right triangle, and the inclined plane of the total reflection prism is a reflecting surface.
In one embodiment, to improve the quality of the combined laser beams, the fast axis of the third laser 31 and the fast axis of the fourth laser 41 are parallel to each other, and the fast axes of the fourth laser 41 and the fifth laser 51 are perpendicular to each other.
Referring to fig. 3, in order to fix each element, the laser fiber coupling device provided in this embodiment further includes a laser base 61, a laser heat sink 62, a first pressing plate 63, a second pressing plate 64, a first lens mounting seat 65, a second lens mounting seat 66, a first fiber connector 67, and a second fiber connector 68.
Wherein the laser base 61 is provided with a cavity for placing and fixing the elements of the laser fiber coupling device. The first laser output end 101 is disposed in the laser base 61 and is adapted to the emitting position of the first combined beam, so as to emit the first combined beam. The laser base 61 is connected with the first optical fiber connector 67 at a position corresponding to the first laser output end 101, so that the position of the first optical fiber connector 67 is ensured to correspond to the light emitting path of the first combined beam, the first optical fiber connector 67 is used for being connected with an optical fiber, the second laser output end 401 is arranged in the laser base 61 and is adapted to the emergent position of the second combined beam, and the second combined beam is emitted conveniently. A second optical fiber connector 68 is connected to a position of the laser base 61 corresponding to the second laser output end 401, so as to ensure that the position of the second optical fiber connector 68 corresponds to the light exit path of the second combined beam, and the second optical fiber connector 68 is used for being connected with an optical fiber.
The laser heat sink 62 is disposed in the laser base 61 and is made of a material with good thermal conductivity, such as metal, preferably copper, to ensure heat dissipation of the laser. The laser heat sink 62 is connected with the laser base 61 through screws, so that the laser heat sink 62 is fixed, and meanwhile, heat-conducting silicone grease is coated on a contact surface, and the heat-conducting performance is improved.
The first pressing plate 63 is arranged in the laser base 61, and the first laser 11 and the second laser 21 are fixed in the laser heat sink 62 through the first pressing plate 63, so that the heat can be rapidly transferred. The second pressing plate 64 is arranged in the laser base 61, and the third laser 31, the fourth laser 41 and the fifth laser 51 are fixed in the laser heat sink 62 through the second pressing plate 64, so that the rapid heat transfer is facilitated.
The first prism assembly 12, the second prism assembly 22, the first cemented prism 13, the second cemented prism 44, the first beam shaping lens group 15, the second beam shaping lens group 23, and the rhombic prism 43 are all fixedly connected in the laser base, for example, cured in the laser base 61 by ultraviolet glue.
First lens mount 65 is located in laser base 61 and is fixed through the mode of viscose, and first coupling lens 14 fixed mounting is on first lens mount 65, for example can be fixed through sticky mode to realize the fixed to first coupling lens 14, and need adjust the distance between first lens mount 65 and first laser output 101 before fixing first lens mount 65, so that laser beam gets into the optic fibre most efficiently. Second lens mount 66 is located in laser base 61 and is fixed through the mode of viscose, and second coupling lens 45 fixed mounting is on second lens mount 66, for example can be fixed through sticky mode to the realization is fixed to second coupling lens 45, and need adjust the distance between second lens mount 66 and second laser output 401 before fixing second lens mount 66, so that laser beam gets into the optic fibre most efficiently.
In one embodiment, the first laser 11 and the second laser 21 are both blue lasers, where both the laser light generated by the first laser 11 and the laser light generated by the second laser 21 are blue light, and the first combined light is blue light; the third laser 31, the fourth laser 41, and the fifth laser 51 are all green lasers, at this time, the laser light generated by the third laser 31, the fourth laser 41, and the fifth laser 51 is green light, and at this time, the second combined light is green light. Of course, in other embodiments, the first laser 11, the second laser 21, the third laser 31, the fourth laser 41, and the fifth laser 51 may be other types of lasers, and are not limited herein.
The beneficial effects of the laser fiber coupling device provided by the embodiment at least comprise:
(1) the embodiment fully considers the deviation condition when the laser generates the laser beam, the wedge prism assembly is arranged in the light path, and the emergent angle of the laser beam generated by the laser is adjusted through the at least two wedge prisms so as to correct the deviation of the laser beam, thereby effectively improving the precision of laser beam combination and improving the quality of the combined beam.
(2) In the present embodiment, the first beam shaping lens group 15 and the second beam shaping lens group 23 are respectively disposed in the first optical path 10 and the second optical path 20, and the laser beam is shaped by the beam shaping lens group to obtain a collimated beam, which is helpful to improve the quality of combined beam light.
(3) The laser fiber coupling device provided by the embodiment has a simple and compact structure, and the optical element is adhered to the laser base 61 by adopting a viscose process, so that the space and the cost are structurally saved, and the laser fiber coupling device is suitable for popularization and application in laser generation. The monochromatic laser fiber coupling device and the dichroic laser fiber coupling device provided by the embodiment can be used in any single-beam, double-beam or multi-beam combination project, the research and development period of a new product can be effectively shortened, and the research and development cost is saved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A laser fiber coupling device, comprising:
a first laser and a first prism assembly disposed along a first optical path;
a second laser and a second prism assembly disposed along a second optical path;
the light-emitting paths of the first prism assembly and the second prism assembly are also provided with a first cemented prism and a first coupling lens, and laser beams generated by the first laser and the second laser form a first combined beam through the first cemented prism and then are emitted through the first coupling lens;
the first prism assembly and the second prism assembly are both wedge prism assemblies, and each wedge prism assembly at least comprises two wedge prisms capable of rotating relatively.
2. The laser fiber coupling device of claim 1, wherein the wedge prism assembly further comprises an optical wedge outer ferrule and an optical wedge inner ferrule, the optical wedge inner ferrule being disposed within the optical wedge outer ferrule and rotatable relative to the optical wedge outer ferrule;
the optical wedge outer ring and the optical wedge inner ring are both fixedly provided with at least one wedge-shaped prism.
3. The laser fiber coupling device of claim 1, wherein the wedge prism assembly comprises two wedge prisms, the inclined surfaces of the two wedge prisms are disposed oppositely, and the deviation angle of the wedge prism assembly to the laser beam is 0-3 °.
4. The laser fiber coupling device of claim 1, further comprising:
the first beam shaping lens group is arranged on the first light path and is positioned between the first prism assembly and the first cemented prism;
and the second beam shaping lens group is arranged on the second light path and is positioned between the second prism assembly and the first cemented prism.
5. The laser fiber coupling device of claim 4, wherein the first beam shaping lens group comprises a first plano-concave cylindrical lens and a first plano-convex cylindrical lens disposed between the first prism assembly and the first cemented prism, and the second beam shaping lens group comprises a second plano-concave cylindrical lens and a second plano-convex cylindrical lens disposed between the second prism assembly and the first cemented prism;
the axis of the first plano-concave cylindrical lens deflects a first preset angle relative to the axis of the second plano-concave cylindrical lens, and the axis of the first plano-convex cylindrical lens deflects a second preset angle relative to the axis of the second plano-convex cylindrical lens.
6. The laser fiber coupling device of claim 1, further comprising:
the prism system comprises a third laser and a third prism assembly arranged along a third light path, a fourth laser and a fourth prism assembly arranged along a fourth light path, and rhombic prisms are further arranged on light emitting paths of the third prism assembly and the fourth prism assembly;
a fifth laser and a fifth prism assembly are arranged along a fifth light path, and a second cemented prism and a second coupling lens are further arranged on light emitting paths of the fourth prism assembly and the fifth prism assembly;
laser beams of the third laser and the fourth laser form intermediate combined beam light through the rhombic prism and then enter the second cemented prism, and the intermediate combined beam light and the laser beam of the fifth laser form second combined beam light through the second cemented prism and then are emitted through the second coupling lens;
the third prism assembly, the fourth prism assembly and the fifth prism assembly are the wedge prism assembly.
7. The laser fiber coupling arrangement of claim 6 wherein the beam fast axes of the first laser and the second laser are perpendicular to each other;
and/or the presence of a gas in the gas,
the fast axes of the light beams of the third laser and the fourth laser are parallel to each other, and the fast axes of the light beams of the fourth laser and the fifth laser are perpendicular to each other.
8. The laser fiber coupling device of claim 6, further comprising:
a laser base;
the laser heat sink is arranged in the laser base;
the first pressing plate is arranged in the laser base, and the first laser and the second laser are fixed in the laser heat sink through the first pressing plate;
the second pressing plate is arranged in the laser base, and the third laser, the fourth laser and the fifth laser are fixed in the laser heat sink through the second pressing plate;
the first coupling lens is fixedly arranged on the first lens mounting seat;
the second coupling lens is fixedly arranged on the second lens mounting seat;
the first optical fiber connecting piece is connected with the laser base and corresponds to the light emitting path of the first combined beam light;
and the second optical fiber connecting piece is connected with the laser base and corresponds to the light emitting path of the second combined beam light.
9. The laser fiber coupling device of claim 6, wherein at least one of the incident surface and the exit surface of the rhombic prism is coated with an antireflection film;
and/or the presence of a gas in the gas,
the first cemented prism and the second cemented prism are both formed by cementing a total reflection prism and an oblique square prism.
10. The laser fiber coupling device of any of claims 6-9, wherein the first laser and the second laser are blue lasers, and the third laser, the fourth laser, and the fifth laser are green lasers.
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| CN202023310612.0U CN213816730U (en) | 2020-12-31 | 2020-12-31 | Optical fiber coupling device of laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112636160A (en) * | 2019-09-20 | 2021-04-09 | 青岛海信激光显示股份有限公司 | Laser device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112636160A (en) * | 2019-09-20 | 2021-04-09 | 青岛海信激光显示股份有限公司 | Laser device |
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