CN115113347A - Optical module for laser indication and laser - Google Patents
Optical module for laser indication and laser Download PDFInfo
- Publication number
- CN115113347A CN115113347A CN202210552436.6A CN202210552436A CN115113347A CN 115113347 A CN115113347 A CN 115113347A CN 202210552436 A CN202210552436 A CN 202210552436A CN 115113347 A CN115113347 A CN 115113347A
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- China
- Prior art keywords
- light
- laser
- cladding
- glue
- refractive index
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Classifications
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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
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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
- G02B6/245—Removing protective coverings of light guides before coupling
-
- 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
- G02B6/4212—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element being a coupling medium interposed therebetween, e.g. epoxy resin, refractive index matching material, index grease, matching liquid or gel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0225—Out-coupling of light
- H01S5/02251—Out-coupling of light using optical fibres
Abstract
The invention relates to an optical module for laser indication and a laser, wherein the optical module for laser indication comprises a light emitting tube, a cladding light stripper and a mode field adapter which are sequentially connected, and the mode field adapter can be also connected with a rear light path of the laser; the luminotron is used for emitting signal light, and the cladding light stripper and the mode field adapter can transmit the signal light. The mode field adapter can be connected with two optical fibers with different core diameters and numerical apertures, so that the transmission efficiency of signal light is improved, the mode transmission of the signal light is optimized, the mode change and the power loss caused by direct fusion of a light path behind a light emitting tube and a laser are reduced, the maximum power of the signal light and the transmission of the best light beam quality can be realized, and the problem that the signal light cannot play an indicating role due to the fact that the energy becomes low after the signal light passes through the whole section of light path of the laser is solved. The cladding stripper is used for stripping cladding light which enters the laser indication optical module from the laser rear optical path and reversely transmits the cladding light, so that the laser indication optical module is protected from being damaged.
Description
Technical Field
The invention relates to the technical field of lasers, in particular to an optical module for laser indication and a laser.
Background
The laser plays an important role in the field of industrial processing due to the advantages of light weight, good beam quality, high long-term stability and the like. In the industrial processing process using the laser, signal light indication is required to be applied so as to lock the action position of the laser. Taking a laser marking machine as an example, the signal light indication has the following advantages:
1) can be used as the focus of a laser marking machine;
2) as the identification light, the light path of the resonant cavity is debugged;
3) as the marker light of marking machine accurate positioning.
As can be seen from the above, in the laser system, the signal light module is used to emit signal light, and thus the signal light module is important. However, in the laser system, the signal light module includes a light emitting tube, and if the light emitting tube is directly connected to the rear optical path of the laser, this causes two problems:
1. the geometrical structures of the luminotrons used for emitting the signal light and the optical fibers of the rear optical path device of the laser are different, and the optical fibers which do not correspond to the two geometrical structures are subjected to standard fusion to generate high insertion loss and reduce the beam quality of the signal light. After signal light is further lost through a light path system behind the laser, the required power at the output end of the laser is difficult to achieve;
2. in the process of processing the high-reflectivity material, certain return light enters the laser system, reversely enters the light-emitting tube along the rear light path system of the laser, and may damage the light-emitting tube. Because the laser wave band used by the industrial common laser system is invisible light, once the signal optical module is damaged by the reverse laser, the whole laser application system is paralyzed and is troublesome to maintain.
Therefore, a light module for laser indicator is needed to solve the above technical problems.
Disclosure of Invention
An object of the present invention is to provide an optical module for laser indication, so as to reduce the loss of forward transmission signal light, ensure the strength of the emitted signal light to meet the requirement, and prevent the return light in the laser from damaging the optical module for laser indication.
In order to achieve the above object, a first aspect of the present invention provides an optical module for laser indication, including a light emitting tube, a cladding stripper and a mode field adapter connected in sequence, where the mode field adapter can also be connected to a rear optical path of a laser;
the luminotron is used for emitting signal light, and the cladding light stripper and the mode field adapter can transmit the signal light.
Optionally, the cladding light stripper includes a light inlet end and a light outlet end, the optical fiber of the light inlet end is fused with the optical fiber of the light emitting tube to form a first fusion point, the optical fiber of the light outlet end is fused with the optical fiber of the mode field adapter to form a second fusion point, and the first fusion point and the second fusion point are both coated with glue.
Optionally, the glue on the first welding point comprises a high refractive index glue.
Optionally, the glue at the first fusion point further includes a low refractive index glue, and the high refractive index glue and the low refractive index glue are alternately arranged along a radial direction of the optical fiber.
Optionally, the refractive index of the high refractive index glue is 1.5-1.6.
Optionally, the glue on the second welding point comprises a low refractive index glue.
Optionally, the refractive index of the low-refractive-index glue is 1.3-1.4.
Optionally, the cladding light stripper includes an incident optical fiber, a cladding light stripper body, and an emergent optical fiber, which are connected in sequence, and the incident optical fiber and/or the emergent optical fiber are/is coiled.
Optionally, the light emitting tube includes a red laser diode.
It is another object of the present invention to provide a laser that provides stability.
To achieve the purpose, the second aspect of the invention adopts the following technical scheme:
a laser comprises the laser indicating light module.
Therefore, according to the technical scheme provided by the invention, the light-emitting tube emits signal light, and the signal light only has normal optical fiber loss after passing through the cladding light stripper and the mode field adapter. The mode field adapter can be connected with two optical fibers with different core diameters and numerical apertures, so that the transmission efficiency of signal light is improved, the mode transmission of the signal light is optimized, the mode change and the power loss caused by direct fusion of a light path behind a light emitting tube and a laser are reduced, the maximum power of the signal light and the transmission of the best light beam quality can be realized, and the problem that the signal light cannot play an indicating role due to the fact that the energy becomes low after the signal light passes through the whole section of light path of the laser is solved.
The cladding light stripper is used for stripping reverse cladding light which enters the laser indication light module from a laser rear light path and is transmitted reversely, so that the laser indication light module is protected from being damaged.
Drawings
Fig. 1 is a schematic structural diagram of an optical module for laser pointing according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another optical module for laser pointing according to an embodiment of the present invention.
In the figure:
1. a light emitting tube;
2. a cladding light stripper; 21. a cladding light stripper body; 22. an incident optical fiber; 23. an outgoing optical fiber;
3. a mode field adapter;
4. a first weld point; 5. a second weld point; 7. high refractive index glue; 8. glue with low refractive index;
30. laser back path.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the present invention, the directional terms such as "upper", "lower", "left", "right", "inner" and "outer" are used for easy understanding without making a contrary explanation, and thus do not limit the scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integral to one another; 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 in specific cases to those skilled in the art.
The present embodiment provides an optical module for laser indication, which is mainly used in a laser to provide signal light, so as to provide indication and guide functions for the laser, but is not limited thereto, and may also be used in other devices that need to provide signal light, so as to reduce loss of signal light, ensure that the intensity of emitted signal light meets requirements, and simultaneously avoid damage of return light in the laser to the optical module for laser indication.
As shown in fig. 1, the optical module for laser indicator provided in this embodiment includes a light emitting tube 1, a cladding stripper 2, and a mode field adapter 3 connected in sequence, where the mode field adapter 3 can also be connected to a rear optical path 30 of a laser, the light emitting tube 1 is used to emit signal light, and both the cladding stripper 2 and the mode field adapter 3 can transmit the signal light.
The light emitting tube 1 emits signal light for indication, and the signal light has only normal optical fiber loss after passing through the cladding stripper and the mode field adapter 3. The mode field adapter 3 can be connected with two optical fibers with different core diameters and numerical apertures, so that the transmission efficiency of signal light is improved, the mode transmission of the signal light is optimized, the mode change and the power loss caused by the direct fusion of the light emitting tube 1 and the rear light path 30 of the laser are reduced, the maximum power of the signal light and the transmission of the best light beam quality can be realized, and the problem that the signal light cannot play an indicating role due to energy attenuation after passing through the whole section of light path of the laser is solved.
The cladding stripper 2 is used to strip the feedback light which enters the laser indication optical module from the laser rear optical path 30 and is transmitted in the reverse direction, thereby protecting the laser indication optical module from damage.
Preferably, the light emitting tube 1 comprises a red laser diode. The red laser diode is used for emitting red light, and the red light is used as visible light, so that the device can well attract attention and has a good indicating effect. Of course, in other alternative embodiments, the light emitting tube 1 may be a light emitting structure other than a red laser diode.
Specifically, the cladding stripper 2 comprises a light inlet end and a light outlet end, the optical fiber of the light inlet end is welded with the optical fiber of the light-emitting tube 1 to form a first welding point 4, the optical fiber of the light outlet end is welded with the optical fiber of the mode field adapter 3 to form a second welding point 5, and the first welding point 4 and the second welding point 5 are both coated with glue. The glue can play a role in dust prevention for the first welding point 4 and the second welding point 5 and light energy conduction according to needs, so that the dust is prevented from affecting the long-term stability of the welding points, and unnecessary cladding light is properly led out according to needs.
In practical applications, the required power of the laser is higher and higher, and the feedback light transmitted in the reverse direction is relatively increased when the laser is applied in industrial applications, which requires higher requirements on the isolation of the reverse light. Therefore, as shown in fig. 2, in order to improve the isolation degree of the laser indication light module from the reverse light, the present embodiment provides that the high refractive index glue 7 peels off the reverse light, i.e. the glue on the first welding point 4 comprises the high refractive index glue 7. The high-refractive-index glue 7 at the first fusion-bonding point 4 does not affect the signal light mode transmitted in the optical fiber and does not affect the transmission of the signal light energy, but the high-refractive-index glue 7 can strip the return light transmitted into the cladding by the cladding stripper 2 out of the optical module for laser indication.
Because when the high refractive index glue 7 peels off the return light, the return light can pass through the high refractive index glue 7, so the high refractive index glue 7 can heat up, in order to prevent heat accumulation, the glue melts, influences the splice point, and further, the glue on the first splice point 4 also comprises low refractive index glue 8, and the high refractive index glue 7 and the low refractive index glue 8 are arranged alternately along the radial direction of the bare fiber cladding. The low refractive index glue 8 cannot be stripped to return light, namely, a sectional stripping return light method is adopted, the low refractive index glue 8 cannot be heated, the low refractive index glue 8 separates two adjacent sections of high refractive index glue 7, and heat accumulation can be avoided. In this embodiment, a section of low refractive index glue 8 is provided, and high refractive index glue 7 is provided on both sides of the low refractive index glue 8, but in other alternative embodiments, the number of sections and corresponding lengths of the high refractive index glue 7 and the low refractive index glue 8 are not limited, and are appropriately adjusted as needed.
Preferably, since the returned light at the second welding point 5 is not weakened by the clad light stripper 2, the intensity of the returned light is greater here, and in order to avoid the returned light from melting the glue at the second welding point 5, the glue at the second welding point 5 is provided as a low refractive index glue 8. The signal light can smoothly pass through the low-refractive-index glue 8 for restraining light energy leakage to enter the mode field adapter 3, after passing through the mode field adapter 3, the mode of the signal light is kept in the original state, and the light energy passes through to the maximum extent and finally enters a rear light path 30 system of the laser.
The clad light stripper 2 includes an incident optical fiber 22, a clad light stripper body 21, and an exit optical fiber 23 connected in this order, and the incident optical fiber 22 and the exit optical fiber 23 are arranged in a coiled manner. It is understood that the coiled arrangement means that the optical fibers are spirally arranged around the same central axis and that each turn has the same diameter, and of course, two adjacent turns of the optical fibers may contact each other or may have a gap. Of course, in other alternative embodiments, one of the incident optical fiber 22 and the exit optical fiber 23 may be coiled. It is understood that the light input end is one end of the incident optical fiber 22, and the light output end is one end of the exit optical fiber 23.
The refractive index distribution of the optical fiber is changed by utilizing the bending stress, so that the return light of a high-order mode can be more quickly leaked out, and the power loss is increased, therefore, the incident optical fiber 22 and the emergent optical fiber 23 which are arranged in a coiling way can enable the return light to enter the cladding of the optical fiber to form cladding light transmitted in the cladding, and the cladding light is finally stripped outside the cladding by utilizing the cladding light stripper 2 and the high-refractive-index glue 7 and enters the outside. It is understood that the winding radius and the specific number of turns of the incident optical fiber 22 and the exit optical fiber 23 may be set as required as long as the intensity of the returned light can be controlled within a preset range.
The return light first passes almost without loss through the mode field adapter 3 and the low refractive index glue 8 at the second weld point 5. Part of the energy of the returned light is "leaked" into the cladding by the cladding stripper 2, and the returned light is stripped by the cladding stripper 2 and the high refractive index glue 7.
By the flexible application of the high-refractive-index glue 7 and the low-refractive-index glue 8 and the combination of the bending mode selection of the incident optical fiber 22 and the outgoing optical fiber 23, the isolation of the reverse light is improved under the condition of ensuring the low-loss transmission of the signal light, so that the optical module for indicating the laser is effectively prevented from being damaged by the reverse light.
Preferably, in this embodiment, high-refractive-index glue 73 has a refractive index of 1.5-1.6, such as a refractive index of 1.56. The low index glue 82 has a refractive index of 1.3-1.4, such as a refractive index of 1.369.
The embodiment also provides a laser which comprises the light module for laser indication. The laser provided by the embodiment has good stability.
Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The optical module for laser indication is characterized by comprising a light emitting tube (1), a cladding light stripper (2) and a mode field adapter (3) which are sequentially connected, wherein the mode field adapter (3) can be further connected with a rear optical path (30) of a laser;
the light emitting tube (1) is used for emitting signal light, and the cladding light stripper (2) and the mode field adapter (3) can transmit the signal light.
2. The light module for laser indication according to claim 1, wherein the cladding light stripper (2) comprises a light inlet end and a light outlet end, the optical fiber of the light inlet end is welded with the optical fiber of the light emitting tube (1) to form a first welding point (4), the optical fiber of the light outlet end is welded with the optical fiber of the mode field adapter (3) to form a second welding point (5), and the first welding point (4) and the second welding point (5) are both coated with glue.
3. The light module for laser pointing according to claim 2, characterized in that the glue on the first fusion point (4) comprises a high refractive index glue (7).
4. The light module for laser pointing according to claim 3, characterized in that said glue on said first fusion point (4) further comprises low refractive index glue (8), said high refractive index glue (7) and said low refractive index glue (8) being arranged alternately in the radial direction of the optical fiber.
5. The light module for laser pointing according to claim 4, characterized in that the refractive index of the high refractive index glue (7) is 1.5-1.6.
6. The light module for laser pointing according to any of claims 2-4, characterized in that the glue on the second fusion point (5) comprises a low refractive index glue (8).
7. The light module for laser pointing according to claim 6, characterized in that the low refractive index glue (8) has a refractive index of 1.3-1.4.
8. The optical module for laser pointing according to any one of claims 1 to 5, characterized in that the cladding stripper (2) comprises an incident optical fiber (22), a cladding stripper body (21) and an exit optical fiber (23) connected in this order, and the incident optical fiber (22) and/or the exit optical fiber (23) are disposed in a coil.
9. The light module for laser indication according to claim 1, wherein the light emitting tube (1) comprises a red laser diode.
10. A laser comprising the laser-indicating optical module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210552436.6A CN115113347A (en) | 2022-05-20 | 2022-05-20 | Optical module for laser indication and laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210552436.6A CN115113347A (en) | 2022-05-20 | 2022-05-20 | Optical module for laser indication and laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115113347A true CN115113347A (en) | 2022-09-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210552436.6A Pending CN115113347A (en) | 2022-05-20 | 2022-05-20 | Optical module for laser indication and laser |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109491017A (en) * | 2018-12-29 | 2019-03-19 | 昆山华辰光电科技有限公司 | The protection structure and guard method of visible light instruction |
| CN111596408A (en) * | 2020-05-25 | 2020-08-28 | 光惠（上海）激光科技有限公司 | High-power fiber laser indication light protection device and implementation method thereof |
| CN113031156A (en) * | 2021-03-31 | 2021-06-25 | 湖南大科激光有限公司 | Optical fiber mode field adapter with cladding power stripping function and preparation method thereof |
| CN113712663A (en) * | 2021-08-20 | 2021-11-30 | 深圳技术大学 | Thulium-doped optical fiber laser treatment device |
| CN113809621A (en) * | 2020-06-12 | 2021-12-17 | 大族激光科技产业集团股份有限公司 | High-power continuous optical fiber laser and processing method of central optical fiber thereof |
| CN114122884A (en) * | 2021-11-30 | 2022-03-01 | 广东利元亨智能装备股份有限公司 | Laser system |
| CN114336244A (en) * | 2021-12-31 | 2022-04-12 | 湖南大科激光有限公司 | Optical fiber laser |
-
2022
- 2022-05-20 CN CN202210552436.6A patent/CN115113347A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109491017A (en) * | 2018-12-29 | 2019-03-19 | 昆山华辰光电科技有限公司 | The protection structure and guard method of visible light instruction |
| CN111596408A (en) * | 2020-05-25 | 2020-08-28 | 光惠（上海）激光科技有限公司 | High-power fiber laser indication light protection device and implementation method thereof |
| CN113809621A (en) * | 2020-06-12 | 2021-12-17 | 大族激光科技产业集团股份有限公司 | High-power continuous optical fiber laser and processing method of central optical fiber thereof |
| CN113031156A (en) * | 2021-03-31 | 2021-06-25 | 湖南大科激光有限公司 | Optical fiber mode field adapter with cladding power stripping function and preparation method thereof |
| CN113712663A (en) * | 2021-08-20 | 2021-11-30 | 深圳技术大学 | Thulium-doped optical fiber laser treatment device |
| CN114122884A (en) * | 2021-11-30 | 2022-03-01 | 广东利元亨智能装备股份有限公司 | Laser system |
| CN114336244A (en) * | 2021-12-31 | 2022-04-12 | 湖南大科激光有限公司 | Optical fiber laser |
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