CN110471191B - Novel multiband light source for material processing and implementation method thereof - Google Patents
Novel multiband light source for material processing and implementation method thereof Download PDFInfo
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- CN110471191B CN110471191B CN201910710784.XA CN201910710784A CN110471191B CN 110471191 B CN110471191 B CN 110471191B CN 201910710784 A CN201910710784 A CN 201910710784A CN 110471191 B CN110471191 B CN 110471191B
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Abstract
The invention discloses a novel multiband light source for material processing and an implementation method thereof, a blue light source near 450nm and light sources of other wave bands, the light source of other wave bands 800-1100nm infrared or near infrared light source, the blue light source and the light source of other wave bands are coupled to contain multi-band output light, the generated light source contains blue light near 450nm and light of other wave bands such as 1064nm infrared wave band, the light sources of all wave bands can be independently modulated according to the requirement, and can be operated in a continuous or pulse mode, can greatly improve the welding and processing capacity of copper, aluminum, gold and other materials, improve the efficiency of infrared light on the materials, locally heat the materials to a near-melting state by blue light, increase the absorption efficiency of the materials to infrared light locally, and the infrared rays further increase the melting part by larger power to heat, thereby completing the required material processing task.
Description
Technical Field
The invention relates to a novel multiband light source and an implementation method thereof, in particular to a novel multiband light source for material processing and an implementation method thereof.
Background
At present, infrared lasers, especially fiber lasers, have wide application in material processing, but the biggest problem of infrared lasers is in the welding of metal copper, and the processing of such materials is self-evident due to the wide application of metal copper in the microelectronic industry, the automobile industry and other aspects, and the infrared lasers have been difficult to process the welding of copper mainly due to the low absorption rate, as shown in fig. 1, copper has only about 5% absorption near the commonly used 1um infrared band, which means that the processing of copper material with infrared laser requires higher peak power, which causes many problems, such as surface oxidation, roughness change, poor welding repeatability, welding spots and the like, and the welding difficulty is very large for dissimilar metals, such as copper/aluminum, copper/stainless steel.
One of the solutions to solve the above problems is to use a blue light source, as shown in fig. 1, copper has an absorption rate of 65% near the blue light band (450nm), which is more than 12 times of the infrared band, and the absorption efficiency of blue light is improved to different degrees compared with that of infrared light for other metals, such as aluminum by about 3 times, nickel and stainless steel by about 2 times, and gold by about 50 times, and high absorption efficiency can be used to significantly improve the process window, and realize a welding mode in which infrared light cannot be realized or is low in efficiency, such as high-quality non-spatter welding.
The most advanced known blue light source is a 450nm laser with a 500 w/400 um core output manufactured by Nuburu corporation in the united states, and the output power of the blue light source is difficult to reach kilowatt or ten thousand watt level due to various technical reasons, and the output power density is limited, so that the blue light source is still not ideal in practical application.
Disclosure of Invention
The invention aims to provide a novel multiband light source for material treatment and an implementation method thereof, and the novel multiband light source has the advantages that blue light and multiband light are coupled, the action efficiency of infrared light on materials is improved, the blue light can locally heat the materials to a near-melting state, the absorption efficiency of the materials to infrared light is increased locally, the infrared light further increases the melting and heating locally with higher power, and the required material treatment task is completed.
In order to achieve the purpose, the invention provides the following technical scheme: a novel multiband light source for material processing, a blue light source near 450nm and light sources of other wave bands, a light source 800 and 1100nm infrared or near infrared light sources of other wave bands, the blue light source and the light sources of other wave bands are coupled to contain multiband output light;
the multiband output light and the input sub-light sources passing through the beam combiner are generated by coupling the blue light with 450nm of one input sub-light source and the blue light with 450nm of the other input sub-light source through the filter; the multi-band light source comprises multi-band output light and an input sub-light source passing through a polarization beam combiner, wherein the input sub-light source is generated by coupling 450nm blue light and 1064nm infrared light through the polarization beam combiner;
the light source generates mixed multiband light of 450nm blue light and 1064nm infrared light, the optical fiber line connects laser to a workpiece processing position from a host, and the quartz interface and the focusing lens module focus the laser to the surface of the workpiece.
The laser pulses operating in continuous or pulsed mode consist of a pre-pulse of 450nm blue energy and a main pulse of 1064nm infrared energy.
The invention provides another technical scheme, and the implementation method of the novel multiband light source for material processing comprises the following steps:
the method comprises the following steps: a blue light source with input light of 450nm is produced by diode laser;
step two: the input light generated by diode laser or fiber laser is the light source of other wave band, and the light source of other wave band is 800-;
step three: the input light is coupled by a common lens coupling method and respectively enters the corresponding optical fibers;
step four: the optical fiber is fused into the output optical fiber by the optical fiber beam combiner, and the input light is combined into the output light in the output optical fiber through the beam combiner.
Further, with respect to step S4, the fiber combiner fuses a set of input fibers to an output fiber by a suitable method, such as high temperature fusion, the output light includes blue light in the 450nm band and also includes high power near infrared or infrared light, and the light sources in all bands can be independently modulated as needed to operate in continuous or pulsed mode.
The invention provides another technical scheme, and the implementation method of the novel multiband light source for material processing comprises the following steps:
the method comprises the following steps: an input sub-light source and a 450nm blue light source are produced by diode laser;
step two: 800-1100nm infrared or near-infrared light source for preparing light source in other wave band by diode laser or fiber laser;
step three: the 450nm blue light and the other wave band light are coupled through the filter plate and the filter plate in turn to generate an input sub-light source;
step four: the input sub-light source and the coupled input sub-light source are respectively coupled into the optical fiber again, and output light is generated by synthesis after passing through the beam combiner.
Further, with respect to step S4, the output light contains blue light around 450nm and light in other wavelength bands, such as the infrared band of 1064nm, and the light sources in all wavelength bands can be independently modulated as required to operate in a continuous or pulsed mode.
The invention provides another technical scheme, and the implementation method of the novel multiband light source for material processing comprises the following steps:
the method comprises the following steps: preparing 450nm blue light by diode laser;
step two: the 1064nm infrared light is generated by diode laser or fiber laser;
step three: the 450nm blue light and the 1064nm infrared light are coupled through a polarization beam combiner to generate a plurality of input sub-light sources;
step four: the input sub-light source and other input sub-light sources are respectively coupled into the optical fiber and are synthesized to generate output light after passing through the beam combiner.
Further, with respect to step S4, the output light contains blue light around 450nm and light in other wavelength bands, such as the infrared band of 1064nm, and the light sources in all wavelength bands can be independently modulated as required to operate in a continuous or pulsed mode.
Compared with the prior art, the invention has the beneficial effects that:
the novel multiband light source for material treatment and the realization method thereof generate light sources including blue light near 450nm and infrared band light with other bands such as 1064nm, the light sources of all bands can be independently modulated according to requirements, and the novel multiband light source operates in a continuous or pulse mode, can greatly improve the welding and processing capabilities of materials such as copper, aluminum, gold and the like, improve the action efficiency of infrared light on the materials, the blue light can locally heat the materials to a near-melting state, the absorption efficiency of the materials to infrared light is increased locally at the moment, and the infrared light further increases and heats the melting part with higher power to complete the required material treatment task.
Drawings
FIG. 1 is an absorption spectrum of a conventional copper;
FIG. 2 is one of the special light source implementations of the present invention;
FIG. 3 illustrates a second implementation of a special light source of the present invention;
FIG. 4 is a third implementation of a special light source of the present invention;
FIG. 5 illustrates a special light source application scenario of the present invention;
FIG. 6 illustrates a special light source control method according to the present invention.
Detailed Description
The technical scheme in the embodiment of the invention will be made clear below by combining the attached drawings in the embodiment of the invention; fully described, it is to be understood that the described embodiments are merely exemplary of some, but not all, embodiments of the invention and that all other embodiments, which can be derived by one of ordinary skill in the art based on the described embodiments without inventive faculty, are within the scope of the invention.
The first embodiment is as follows:
referring to fig. 2, a novel multiband light source for material processing, a blue light source near 450nm and light sources in other bands, a light source 800 in other bands and a 1100nm infrared or near infrared light source, the blue light source and the light sources in other bands are coupled to output light 20 containing multiband.
The invention provides another technical scheme, a novel multiband light source for material processing and an implementation method thereof, and the method comprises the following steps:
the method comprises the following steps: a blue light source with input light 10, 11 and 12 of 450nm is produced by diode laser;
step two: the input light 13 is generated by diode laser or generated by fiber laser, 14 is light source of other wave band, and the light source of other wave band is 800-;
step three: the input light 10-14 is coupled by the common lens coupling method and enters the corresponding input optical fiber 100-104;
step four: the optical fibers 100 and 104 are fused into the output optical fiber 200 by the optical fiber combiner 210, the input light 10-14 is also combined into the output light 20 in the output optical fiber 200 by the optical fiber combiner 210, the optical fiber combiner 210 fuses a group of input optical fibers 100 and 104 to one output optical fiber 200 by using a suitable method, such as high temperature fusion, the output light 20 includes blue light in a 450nm waveband and also includes high-power near infrared or infrared light, and light sources in all wavebands can be independently modulated as required and operate in a continuous or pulse mode.
Example two:
referring to fig. 3, a novel multiband light source for material processing, multiband output light 20, and input sub-light source 10 and input sub-light sources 30 and 31 passing through an optical fiber combiner 210, wherein the input sub-light source 10 is 450nm blue light, and the input sub-light sources 30 and 31 are 450nm blue light 301 and other band light sources 302 generated by coupling through a filter 304.
The invention provides another technical scheme, a novel multiband light source for material processing and an implementation method thereof, and the method comprises the following steps:
the method comprises the following steps: the input sub-light source 10 and the blue light source with the blue light 301 of 450nm are produced by diode laser;
step two: 800-1100nm infrared or near-infrared light source for preparing light source 302 in other wave band by diode laser generation or fiber laser generation;
step three: the 450nm blue light 301 and the light source 302 in other wave bands are coupled through the filter 303 and the filter 304 in turn to generate the input sub-light sources 30 and 31;
step four: the input sub-light source 10 and the input sub-light sources 30 and 31 are respectively coupled into an optical fiber and are synthesized to generate output light 20 after passing through the optical fiber beam combiner 210, the output light 20 contains blue light 301 near 450nm and light sources 302 in other wave bands such as infrared wave bands of 1064nm, the light sources in all the wave bands can be independently modulated according to requirements and operate in a continuous or pulse mode, the blue light 301 and the infrared light are respectively modulated when the optical fiber is used, and the total absorption of the optical fiber sources by materials is optimized.
Example three:
referring to fig. 4, a novel multiband light source for material processing is characterized in that multiband output light 20 and input sub-light source 40 and input sub-light sources 30 and 31 pass through a polarization beam combiner 403, and the input sub-light source 40 and input sub-light sources 30 and 31 are generated by coupling 450nm blue light 401 and 1064nm infrared light 402 through the polarization beam combiner 403.
The invention provides another technical scheme, a novel multiband light source for material processing and an implementation method thereof, and the method comprises the following steps:
the method comprises the following steps: preparing 450nm blue light 401 by diode laser;
step two: preparing 1064nm infrared light 402 by diode laser generation or fiber laser generation;
step three: the 450nm blue light 401 and the 1064nm infrared light 402 are coupled by a polarization beam combiner 403 to generate an input sub-light source 40 and input sub-light sources 30 and 31;
step four: the input sub-light source 10 and the input sub-light sources 30 and 31 are respectively coupled into an optical fiber, and are synthesized to generate output light 20 after passing through the beam combiner 210, wherein the output light 20 contains blue light near 450nm and infrared band light of other bands such as 1064nm, and light sources of all bands can be independently modulated according to requirements and operate in a continuous or pulse mode.
Blue light and infrared light are transmitted to the input optical fiber through the WDM filter plate and then coupled to the output optical fiber through the optical fiber beam combiner, and when the optical fiber beam combiner is used, the blue light 401 and the infrared light 402 are respectively modulated, so that the total absorption of the material to a light source is optimized.
Example four:
referring to fig. 5, a light source 50 generates mixed multi-band light of 450nm blue and 1064nm infrared, a fiber line 51 connects the laser from the host to the workpiece processing site, and a quartz interface 52 and a focusing lens module 53 focus the laser on the surface of a workpiece 54 for performing desired material processing operations such as welding, cutting, marking, or surface cleaning.
Example five:
referring to fig. 6, the laser pulse in continuous or pulsed mode consists of a pre-pulse 61 and a main pulse 62, the pre-pulse 61 is blue light energy of 450nm and the main pulse 62 is infrared light energy of 1064nm, the blue pre-pulse 61 can locally heat the material to a near-melting state, where the material locally absorbs infrared light more efficiently, and the infrared main pulse 62 further heats the melted part more heavily with more power to accomplish the desired material processing task.
In summary, the following steps: the invention relates to a novel multiband light source for material treatment and an implementation method thereof, wherein the generated light source comprises blue light near 450nm and infrared band light with other bands such as 1064nm, the light sources of all bands can be independently modulated according to requirements and operate in a continuous or pulse mode, the welding and processing capabilities of materials such as copper, aluminum, gold and the like can be greatly improved, the action efficiency of infrared light on the materials is improved, the blue light can locally heat the materials to a near-melting state, the absorption efficiency of the materials to infrared light is increased locally, and the infrared light further increases and heats the melting part with higher power to complete the required material treatment task.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (1)
1. A novel multiband light source for material processing is characterized by comprising a 450nm blue light source and other waveband light sources, wherein the other waveband light sources are 800-1100nm infrared or near-infrared light sources, and the blue light source and the other waveband light sources are coupled through an optical fiber beam combiner to obtain output light containing multiband;
the optical fiber beam combiner is coupled by an optical fiber line to connect laser to a workpiece processing position from a host, and the quartz interface and the focusing lens module are coupled to focus the laser on the surface of the workpiece;
the implementation method of the novel multiband light source for material processing comprises the following steps:
s1: a blue light source with input light of 450nm is produced by diode laser;
s2: the other waveband light source with the input light of 800-;
s3: generating a plurality of input sub-light sources by first coupling the blue light source and the other waveband light sources;
s4: performing second coupling on the blue light source and the other waveband light sources and the input sub-light source after the first coupling to generate output light;
the coupling mode in the step S3 is one of filter coupling, lens coupling and polarization beam combiner coupling;
the filter is coupled to couple the blue light with the output light of 450nm of the multiband and light sources in other wave bands through the filter;
the polarization beam combiner is coupled to enable the multiband output light to be 450nm blue light and 1064nm infrared light to be coupled through the polarization beam combiner;
the light sources of all wave bands are independently modulated according to requirements and run in a continuous or pulse mode, the laser pulse running in the continuous or pulse mode consists of a pre-pulse and a main pulse, the pre-pulse is blue light energy of 450nm, and the main pulse is infrared light energy of 1064 nm.
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| CN101634730A (en) * | 2008-07-25 | 2010-01-27 | 通用电气公司 | Light transformation system and light transformation method |
| CN101728757A (en) * | 2008-10-30 | 2010-06-09 | 北京中视中科光电技术有限公司 | All-solid-state laser |
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| WO2018144524A1 (en) * | 2017-01-31 | 2018-08-09 | Nuburu Inc. | Methods and systems for welding copper using blue laser |
| CN109715339A (en) * | 2016-04-29 | 2019-05-03 | 努布鲁有限公司 | The visible laser welding of Electronic Packaging, motor-driven electronic equipment, battery and other components |
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| CN206322993U (en) * | 2016-08-31 | 2017-07-11 | 中电科天之星激光技术（上海）有限公司 | A kind of dual wavelength fibre laser |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634730A (en) * | 2008-07-25 | 2010-01-27 | 通用电气公司 | Light transformation system and light transformation method |
| CN101728757A (en) * | 2008-10-30 | 2010-06-09 | 北京中视中科光电技术有限公司 | All-solid-state laser |
| CN203813199U (en) * | 2014-02-12 | 2014-09-03 | 南京长青激光科技有限责任公司 | Laser capable of outputting white light |
| CN109715339A (en) * | 2016-04-29 | 2019-05-03 | 努布鲁有限公司 | The visible laser welding of Electronic Packaging, motor-driven electronic equipment, battery and other components |
| WO2018144524A1 (en) * | 2017-01-31 | 2018-08-09 | Nuburu Inc. | Methods and systems for welding copper using blue laser |
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