CN112630904A - Laser coupling debugging device and laser coupling debugging method - Google Patents

Laser coupling debugging device and laser coupling debugging method Download PDF

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Publication number
CN112630904A
CN112630904A CN202011615408.1A CN202011615408A CN112630904A CN 112630904 A CN112630904 A CN 112630904A CN 202011615408 A CN202011615408 A CN 202011615408A CN 112630904 A CN112630904 A CN 112630904A
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China
Prior art keywords
coupling
lens
laser
optical fiber
coupler
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Pending
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CN202011615408.1A
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Chinese (zh)
Inventor
王建刚
杨田
王雪辉
雷桂明
杨威
程英
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Wuhan Huagong Laser Engineering Co Ltd
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Wuhan Huagong Laser Engineering Co Ltd
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Priority to CN202011615408.1A priority Critical patent/CN112630904A/en
Publication of CN112630904A publication Critical patent/CN112630904A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
    • G02B6/422—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements
    • G02B6/4225—Active alignment, i.e. moving the elements in response to the detected degree of coupling or position of the elements by a direct measurement of the degree of coupling, e.g. the amount of light power coupled to the fibre or the opto-electronic element

Abstract

The invention provides a laser coupling debugging device and a laser coupling debugging method, wherein the laser coupling debugging device comprises: the laser is used for emitting indicating light, and the indicating light is red light; the optical fiber coupling device comprises at least one coupling optical fiber assembly, each coupling optical fiber assembly comprises at least one lens group, at least one coupler and at least one optical fiber, the number of the couplers and the number of the optical fibers are the same, each lens group comprises at least one lens, the lens groups are used for changing the propagation direction of indicating light and transmitting the indicating light to the couplers, the couplers are used for coupling the indicating light to the optical fibers, the optical fibers comprise end faces where the indicating light enters, and the red light reflectivity of the end faces is 1% -5%; at least one optically coupled viewing lens. The application provides a laser coupling debugging device is through the ruddiness reflectivity who sets for the terminal surface of optic fibre, can audio-visually observe the formation of image of pilot light on the terminal surface of optic fibre through the optical coupling sight glass and debug, and then confirms the position of laser, ensures that laser gets into the optical fiber core footpath, has avoided blind harmonious illusion coupling phenomenon up to standard.

Description

Laser coupling debugging device and laser coupling debugging method
Technical Field
The invention relates to the technical field of laser processing, in particular to a laser coupling debugging device and a laser coupling debugging method.
Background
Currently, laser coupling technology is commonly used for laser processing equipment. For laser coupling, optical fiber butt joint is often adopted, or an optical fiber with an end cap is adopted, during debugging, adjustment is carried out under low input power, and the position where the output power reaches the maximum is measured to judge whether the coupling meets the requirement. The prior method has the following problems: adopting low input power, blindly guessing the adjusting direction, and measuring the output power to judge whether the coupling is effective; the false coupling reaches the standard, namely the laser does not completely enter the core diameter of the optical fiber and is transmitted through the cladding, and the output power can also reach the requirement.
Disclosure of Invention
In view of this, an object of the embodiments of the present application is to provide a laser coupling debugging apparatus and a laser coupling debugging method, which can solve the problems that the existing debugging method needs to guess the adjusting direction blindly and the pseudo coupling reaches the standard.
The invention provides the following technical scheme:
in a first aspect, an embodiment of the present application provides a laser coupling debugging apparatus, including:
the laser is used for emitting indicating light, wherein the indicating light is red light;
at least one coupling optical fiber assembly, wherein each coupling optical fiber assembly comprises at least one lens group, at least one coupler and at least one optical fiber, the number of the couplers and the number of the optical fibers are the same, each lens group comprises at least one lens, the lens group is used for changing the propagation direction of the indicating light and transmitting the indicating light to the coupler, the coupler is used for coupling the indicating light to the optical fiber, the optical fiber comprises an end face on which the indicating light is incident, and the red light reflectivity of the end face is 1% -5%;
at least one optically coupled viewing mirror for viewing an image of the indicator light at the end face.
According to a specific embodiment disclosed in the present application, the number of the coupling optical fiber assembly, the lens group, the coupler, the optical fiber, the lens and the optical coupling observation mirror is one, and the lens is a beam combining lens.
According to a specific embodiment disclosed in the present application, the coupling optical fiber assembly, the lens group, the coupler, the optical fiber and the number of the optical coupling observation mirrors are one, the lens group includes a beam combining lens and two total reflection lenses, the indication light sequentially passes through the beam combining lens, two the total reflection lenses are transmitted to the coupler.
According to the specific embodiment disclosed in the application, the quantity of coupling optical fiber subassembly is a plurality of, every coupling optical fiber subassembly includes a lens group, a coupler and an optic fibre, every the lens group includes a lens, and the distance lens that the laser instrument is farthest is for totally reflecting lens and other lenses are the beam split lens, the instruction light passes through in proper order transmit to corresponding coupler and warp behind the beam split lens beam split the transmission to corresponding coupler after totally reflecting the lens reflection, the quantity of optical coupling sight glass with the quantity of coupling optical fiber subassembly is the same.
According to a specific embodiment disclosed in the present application, the red light transmittance of the non-laser-incident surface of the splitting lens is greater than or equal to 85%.
According to a specific embodiment disclosed in the application, the quantity of coupling optical fiber subassembly is one, the coupling optical fiber subassembly includes a lens group, a plurality of coupler and a plurality of optic fibre, the coupler with the quantity of optic fibre is the same, the lens group includes a beam combining lens and a full anti-lens, the full anti-lens is connected with a motor, the motor is used for control the full anti-lens is with a plurality of angle between the coupler, the pilot light passes through in proper order the beam combining lens the full anti-lens transmit to one the coupler, the quantity of optical coupling sight glass is one.
According to a specific embodiment disclosed in the present application, the red light transmittance of the non-laser facing surface of the all-reflection lens is greater than or equal to 85%.
According to a specific embodiment disclosed in the present application, the red light transmittance of the laser facing surface of the beam combining lens is greater than or equal to 10%, and the red light transmittance of the laser non-facing surface of the beam combining lens is greater than or equal to 85%.
According to a specific embodiment disclosed in the present application, the laser coupling debugging apparatus further includes: the collimating mirror is arranged between the laser and the coupling optical fiber assembly and is used for collimating the indicating light emitted by the laser.
In a second aspect, an embodiment of the present application provides a laser coupling debugging method, which is applied to the coupling debugging apparatus in the first aspect, and the method includes:
controlling the laser to emit indicating light;
adjusting the position of the optical fiber, wherein the position comprises the relative position between the optical fiber and the coupler and the position of the optical fiber in the plane of the end face;
observing the image of the indicating light on the end face through the optical coupling observation mirror;
and if the image is positioned in the center of the end face and the size of the image is within a preset threshold value, judging that the coupling is effective.
The embodiment of the invention has the following advantages:
the application provides a laser coupling debugging device, through the ruddiness reflectivity who sets for the terminal surface of optic fibre to can audio-visually observe the formation of image of pilot light on the terminal surface of optic fibre through the optical coupling sight glass and debug, and then confirm the position of laser, ensure that laser gets into the optical fiber core footpath, avoid the blind phenomenon up to standard of mediating the false image coupling.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible and comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram illustrating a laser coupling debugging apparatus according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram illustrating a laser coupling debugging apparatus according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram illustrating a laser coupling debugging apparatus according to a third embodiment of the present invention;
fig. 4 shows a schematic structural diagram of a laser coupling debugging apparatus according to a fourth embodiment of the present invention;
fig. 5 shows a flowchart of a laser coupling debugging method provided by an embodiment of the present invention.
Description of the main element symbols:
1-a first optically coupled viewer; 1 a-a second optically coupled viewer; 1 b-a third optically coupled scope; 1 c-a fourth optically coupled scope; 2-beam combining lens; s1-the laser-facing surface of the beam-combining lens; s2-non-incident laser surface of the beam combining lens; 3-a first coupler; 3 a-a second coupler; 3 b-a third coupler; 3 c-a fourth coupler; 4-a first optical fiber; 4 a-a second optical fiber; 4 b-a third optical fiber; 4 c-a fourth optical fiber; s5 — a first end face; s5a — second end face; s5b — a third end face; s5c — a fourth end face; 5-total reflection lens; s4-non-incident laser surface of total reflection lens; 7-a collimating mirror; 8-a laser; 9-a first beam splitting lens; 10-a second beam splitting lens; s7-the non-incident laser surface of the first beam splitter lens; s9-the non-incident laser surface of the second beam splitter; 11-a motor; 13-coupled fiber optic assembly.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
The laser coupling debugging device that this application embodiment provided includes:
the laser is used for emitting indicating light, wherein the indicating light is red light;
at least one coupling optical fiber assembly 13, each coupling optical fiber assembly 13 comprises at least one lens group, at least one coupler and at least one optical fiber, the number of the couplers and the number of the optical fibers are the same, each lens group comprises at least one lens, the lens group is used for changing the propagation direction of the indicating light and transmitting the indicating light to the coupler, the coupler is used for coupling the indicating light to the optical fiber, the optical fiber comprises an end face on which the indicating light is incident, and the red light reflectivity of the end face is 1% -5%;
at least one optically coupled viewing mirror for viewing an image of the indicator light at the end face.
Specifically, red light refers to visible light with a wavelength of 600-700 nm. The red reflectance of the facets can be typically set by grinding the facets or plating the facets with an anti-reflective coating.
It will be appreciated by those skilled in the art that the number of the coupling fiber assembly, the lens set, the coupler, the optical fiber and the lens can be determined according to different laser systems. In this embodiment, the number of the coupling optical fiber assembly, the lens set, the coupler, the optical fiber, the lens and the optical coupling observation mirror is one.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a laser coupling debugging apparatus provided in this embodiment, and as shown in fig. 1, the number of the coupling optical fiber assembly, the lens group, the coupler, the optical fiber, the lens and the optical coupling observation mirror is one, and the lens is a beam combining lens 2.
The red light transmittance of the laser facing surface S1 of the beam combining lens is greater than or equal to 10%, and the red light transmittance of the laser non-facing surface S2 of the beam combining lens is greater than or equal to 85%.
The laser coupling debugging device further comprises: the collimating mirror 7 is arranged between the laser 8 and the coupling optical fiber assembly 13, and the collimating mirror 7 is used for collimating the indicating light emitted by the laser 8.
The laser 8 emits the indicating light, and the collimator lens 7 changes the divergent indicating light emitted from the laser 8 into parallel indicating light. The parallel indicator light is reflected by the beam combining lens 2, enters the first coupler 3, and is focused on the first end surface S5 of the first optical fiber 4. Since the red light reflectivity of the first end surface S5 of the first optical fiber 4 is 1% -5%, part of the indicating light passes through the first coupler 3 and the beam combining lens 2 after being reflected by the first end surface S5. Meanwhile, the beam combining lens 2 has a certain transmittance of red light, so that the first end surface S5 of the first optical fiber 4 and the image of the indicating light emitted by the laser 8 can be clearly seen through the first optical coupling observation mirror 1. By adjusting the relative positions of the first optical fiber 4 and the first coupler 3, a change in the image of the indication light focused on the first end face S5 of the first optical fiber 4 can be observed by the first optical coupling observation mirror 1; by adjusting the position of the first optical fiber 4 in the plane of the first end face S5, it can be observed through the first optical coupling observation mirror 1 whether the position of the indicating light on the first end face S5 of the first optical fiber 4 in the image is at the center of the first end face S5. When the first optical coupling observation mirror 1 sees that the image is located at the center of the first end surface S5 of the first optical fiber 4 and the size of the image is within the preset threshold, the coupling can be determined to be effective.
The application provides a laser coupling debugging device, through the ruddiness reflectivity who sets for the terminal surface of optic fibre to can audio-visually observe the formation of image of pilot light on the terminal surface of optic fibre through the optical coupling sight glass and debug, and then confirm the position of laser, ensure that laser gets into the optical fiber core footpath, avoid the blind phenomenon up to standard of mediating the false image coupling.
Example 2
Referring to fig. 2, fig. 2 is a schematic structural diagram of the laser coupling debugging apparatus provided in this embodiment, and as shown in fig. 2, compared with the above embodiments, the difference of the laser coupling debugging apparatus of this embodiment is that the number of the coupling optical fiber assembly, the lens group, the coupler, the optical fiber, and the optical coupling observation mirror is one, the lens group includes a beam combining lens 2 and two total reflection lenses 5, and the indicating light is transmitted to the first coupler 3 through the beam combining lens 2 and the two total reflection lenses 5 in sequence.
The red light transmittance of the laser facing surface of the beam combining lens is greater than or equal to 10%, and the red light transmittance of the laser non-facing surface of the beam combining lens is greater than or equal to 85%.
The red light transmittance of the non-laser facing surface S4 of the total reflection lens 5 is greater than or equal to 85%.
The laser 8 emits the indicating light, and the collimator lens 7 changes the divergent indicating light emitted from the laser 8 into parallel indicating light. The parallel indicating light sequentially passes through the beam combining lens 2 and the two total reflection lenses 5, enters the first coupler 3, and is focused on the first end surface S5 of the first optical fiber 4. Since the red light reflectivity of the first end surface S5 of the first optical fiber 4 is 1% -5%, part of the indicating light passes through the first coupler 3, the two total reflection lenses 5 and the beam combining lens 2 after being reflected by the first end surface S5. Meanwhile, the beam combining lens 2 has a certain transmittance of red light, so that the first end surface S5 of the first optical fiber 4 and the image of the indicating light emitted by the laser 8 can be clearly seen through the first optical coupling observation mirror 1.
Example 3
Referring to fig. 3, fig. 3 is a schematic structural diagram of a laser coupling debugging apparatus provided in this embodiment, and as shown in fig. 3, compared with the above embodiment, the difference of the laser coupling debugging apparatus of this embodiment is that the laser coupling debugging apparatus is applied to a laser energy splitting system, the number of the coupled optical fiber assemblies is multiple, each coupled optical fiber assembly includes a lens group, a coupler and an optical fiber, each lens group includes a lens, a lens farthest from the laser is a total reflection lens and the other lenses are splitting lenses, the indicating light is transmitted to the corresponding coupler after being split by the splitting lenses in sequence and is transmitted to the corresponding coupler after being reflected by the total reflection lens, and the number of the optical coupling observation mirrors is the same as the number of the coupled optical fiber assemblies.
The red light transmittance of the non-laser facing surface S4 of the total reflection lens is greater than or equal to 85%.
The red light transmittance of the non laser facing surface S7 of the first light splitting lens and the non laser facing surface S9 of the second light splitting lens is greater than or equal to 85%.
Those skilled in the art will appreciate that the number of the dispersing lenses can be set as desired. The present embodiment further describes the case where the number of the spectroscopic lens is two.
The laser 8 emits the indicating light, and the collimator lens 7 changes the divergent indicating light emitted from the laser 8 into parallel indicating light. After parallel indicating light is split by the first light splitting lens 9, a part of the light is reflected to enter the second coupler 3a corresponding to the first light splitting lens 9, the other part of the light is transmitted to the second light splitting lens 10 and then split, a part of the light is reflected to enter the third coupler 3b corresponding to the second light splitting lens 10, the other part of the light is transmitted to the total reflection lens 5, and the total reflection lens 5 totally reflects the light to enter the fourth coupler 3c corresponding to the total reflection lens 5. The indicator light is focused by the second coupler 3a, the third coupler 3b, and the fourth coupler 3c onto the second end face S5a of the second optical fiber 4a, the third end face S5b of the third optical fiber 4b, and the fourth end face S5c of the fourth optical fiber 4 c. Since the second end surface S5a, the third end surface S5b and the fourth end surface S5c have a reflectivity of 1% -5%, part of the indicating light is reflected through the second coupler 3a and the first beam splitter 9, the third coupler 3b and the second beam splitter 10, the fourth coupler 3c and the all-reflection mirror 5. Because the first spectroscope 9, the second spectroscope 10 and the total reflection lens 5 have a certain transmittance of red light, the imaging of the second end surface S5a of the second optical fiber 4a and the indicating light emitted by the laser 8, the imaging of the third end surface S5b of the third optical fiber 4b and the indicating light emitted by the laser 8, and the imaging of the fourth end surface S5c of the fourth optical fiber 4c and the indicating light emitted by the laser 8 can be clearly seen through the first optical coupling observation mirror 1, the second optical coupling observation mirror 1a, the third optical coupling observation mirror 1b and the fourth optical coupling observation mirror 1c, respectively.
Example 4
Please refer to fig. 4, fig. 4 is a schematic structural diagram of a laser coupling debugging apparatus provided in this embodiment, and as shown in fig. 4, compared with the above embodiments, the difference of the laser coupling debugging apparatus of this embodiment is that the laser coupling debugging apparatus is applied to a laser high-speed optical splitting system, the number of the coupling optical fiber assemblies is one, the coupling optical fiber assemblies include a lens group, a plurality of couplers and a plurality of optical fibers, the number of the couplers and the optical fibers is the same, the lens group includes a beam combining lens and a total reflection lens, the total reflection lens is connected to a motor, the motor is used to control angles between the total reflection lens and the plurality of couplers, the indicating light is transmitted to one coupler through the beam combining lens and the total reflection lens in sequence, and the number of the optical coupling observation lenses is one.
The red light transmittance of the non-laser facing surface S4 of the total reflection lens is greater than or equal to 85%.
The red light transmittance of the laser facing surface of the beam combining lens is greater than or equal to 10%, and the red light transmittance of the laser non-facing surface of the beam combining lens is greater than or equal to 85%.
Those skilled in the art will appreciate that the number of couplers and fibers may be set as desired. The present embodiment is further described by taking the number of couplers and optical fibers as four as an example.
The laser 8 emits the indicating light, and the collimator lens 7 changes the divergent indicating light emitted from the laser 8 into parallel indicating light. The parallel indicating light is reflected to the total reflection lens 5 through the beam combining lens 2, the total reflection lens 5 is installed on the motor 11, the motor 11 is controlled to swing, the change of the incidence angle of the light emitted by the total reflection lens 5 and the laser 8 is changed, and the indicating light is reflected to one of the first coupler 3, the second coupler 3a, the third coupler 3b and the fourth coupler 3 c. The indicator light is focused by one of the first coupler 3, the second coupler 3a, the third coupler 3b, and the fourth coupler 3c onto a corresponding one of the first end face S5 of the first optical fiber 4, the second end face S5a of the second optical fiber 4a, the third end face S5b of the third optical fiber 4b, and the fourth end face S5c of the fourth optical fiber 4 c. Because the first end surface S5, the second end surface S5a, the third end surface S5b and the fourth end surface S5c have a reflectivity of 1% to 5%, part of the indicating light is reflected to pass through one of the first coupler 3, the second coupler 3a, the third coupler 3b and the fourth coupler 3c, and then is reflected to the beam combining lens 2 through the total reflection lens 5, and an image of the indicating light emitted by the laser and one of the first end surface S5, the second end surface S5a, the third end surface S5b and the fourth end surface S5c can be clearly seen through the first optical coupling observation lens 1.
Example 5
Referring to fig. 5, fig. 5 is a flowchart of a laser coupling debugging method according to an embodiment of the present application, and as shown in fig. 5, the laser coupling debugging method applied to the coupling debugging apparatus according to any of the embodiments includes the following steps:
step 501, controlling the laser to emit indicating light.
And 502, adjusting the position of the optical fiber, wherein the position comprises the relative position between the optical fiber and the coupler and the position of the optical fiber on the plane of the end face.
Specifically, by changing the relative position between the optical fiber and the coupler, the size of the image of the indicating light on the end face is changed; by changing the position of the optical fiber in the plane of the end face, the position of the image of the indicating light on the end face is changed.
And step 503, observing the image of the indicating light on the end face through the optical coupling observation mirror.
And step 504, if the image is located in the center of the end face and the size of the image is within a preset threshold value, judging that the coupling is effective.
In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (10)

1. A laser coupling debugging apparatus, comprising:
the laser is used for emitting indicating light, wherein the indicating light is red light;
at least one coupling optical fiber assembly, wherein each coupling optical fiber assembly comprises at least one lens group, at least one coupler and at least one optical fiber, the number of the couplers and the number of the optical fibers are the same, each lens group comprises at least one lens, the lens group is used for changing the propagation direction of the indicating light and transmitting the indicating light to the coupler, the coupler is used for coupling the indicating light to the optical fiber, the optical fiber comprises an end face on which the indicating light is incident, and the red light reflectivity of the end face is 1% -5%;
at least one optically coupled viewing mirror for viewing an image of the indicator light at the end face.
2. The apparatus of claim 1, wherein the number of the coupling fiber assembly, the lens set, the coupler, the optical fiber, the lens, and the optical coupling observation mirror is one, and the lens is a beam combining lens.
3. The apparatus of claim 1, wherein the number of the coupling fiber assembly, the lens set, the coupler, the optical fiber and the optical coupling observation mirror is one, the lens set includes a beam combining lens and two total reflection lenses, and the indication light is transmitted to the coupler through the beam combining lens and the two total reflection lenses in sequence.
4. The apparatus according to claim 1, wherein the number of the coupling optical fiber assemblies is plural, each of the coupling optical fiber assemblies includes a lens group, a coupler and an optical fiber, each of the lens groups includes a lens, the lens farthest from the laser is a total reflection lens and the other lenses are splitting lenses, the indication light is transmitted to the corresponding coupler after being split by the splitting lenses and then transmitted to the corresponding coupler after being reflected by the total reflection lens, and the number of the optical coupling observation mirrors is the same as the number of the coupling optical fiber assemblies.
5. The laser coupling debugging device of claim 4, wherein the red light transmittance of the non-laser facing surface of the splitting lens is greater than or equal to 85%.
6. The apparatus of claim 1, wherein the number of the coupling fiber assemblies is one, the coupling fiber assemblies include a lens set, a plurality of couplers and a plurality of fibers, the number of the couplers and the number of the fibers are the same, the lens set includes a beam combining lens and a total reflection lens, the total reflection lens is connected to a motor, the motor is configured to control an angle between the total reflection lens and the plurality of couplers, the indication light sequentially passes through the beam combining lens and the total reflection lens and is transmitted to one of the couplers, and the number of the optically coupled observation mirrors is one.
7. The laser coupling debugging device of any one of claims 3, 4 and 6, wherein the red light transmittance of the non-laser-facing surface of the all-reflection lens is greater than or equal to 85%.
8. The laser coupling debugging device of any one of claims 2, 3 and 6, wherein the red light transmittance of the laser facing surface of the beam combining lens is greater than or equal to 10%, and the red light transmittance of the laser non-facing surface of the beam combining lens is greater than or equal to 85%.
9. The laser coupling debugging apparatus according to claim 1, further comprising: the collimating mirror is arranged between the laser and the coupling optical fiber assembly and is used for collimating the indicating light emitted by the laser.
10. A laser coupling debugging method applied to the coupling debugging apparatus according to any one of claims 1 to 9, the method comprising:
controlling the laser to emit indicating light;
adjusting the position of the optical fiber, wherein the position comprises the relative position between the optical fiber and the coupler and the position of the optical fiber in the plane of the end face;
observing the image of the indicating light on the end face through the optical coupling observation mirror;
and if the image is positioned in the center of the end face and the size of the image is within a preset threshold value, judging that the coupling is effective.
CN202011615408.1A 2020-12-30 2020-12-30 Laser coupling debugging device and laser coupling debugging method Pending CN112630904A (en)

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Application Number Priority Date Filing Date Title
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CN204065472U (en) * 2014-07-11 2014-12-31 北京工业大学 A kind of simple fiber-optics taper-coupled imaging system efficiently
CN104977665A (en) * 2014-04-10 2015-10-14 苏州天弘激光股份有限公司 Laser and optical fiber coupler and coupling method
CN206235759U (en) * 2016-08-04 2017-06-09 苏州优谱德精密仪器科技有限公司 A kind of structure for laser coupled to be entered multifiber
CN208399756U (en) * 2018-08-02 2019-01-18 光越科技(深圳)有限公司 Laser splitting device
CN110895364A (en) * 2019-12-19 2020-03-20 苏州迅镭激光科技有限公司 High-coupling-efficiency fiber laser debugging device and method

Patent Citations (7)

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Publication number Priority date Publication date Assignee Title
CN104977665A (en) * 2014-04-10 2015-10-14 苏州天弘激光股份有限公司 Laser and optical fiber coupler and coupling method
CN104238044A (en) * 2014-07-11 2014-12-24 北京工业大学 Simple and efficient microstructure fiber end face imaging system
CN204065472U (en) * 2014-07-11 2014-12-31 北京工业大学 A kind of simple fiber-optics taper-coupled imaging system efficiently
CN204028412U (en) * 2014-09-01 2014-12-17 北京杏林睿光科技有限公司 Double-wavelength semiconductor laser beam coupled structure
CN206235759U (en) * 2016-08-04 2017-06-09 苏州优谱德精密仪器科技有限公司 A kind of structure for laser coupled to be entered multifiber
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Application publication date: 20210409