CN115051234A - Quasi-continuous green laser light-emitting device and use method thereof - Google Patents
Quasi-continuous green laser light-emitting device and use method thereof Download PDFInfo
- Publication number
- CN115051234A CN115051234A CN202210625565.3A CN202210625565A CN115051234A CN 115051234 A CN115051234 A CN 115051234A CN 202210625565 A CN202210625565 A CN 202210625565A CN 115051234 A CN115051234 A CN 115051234A
- Authority
- CN
- China
- Prior art keywords
- laser
- light
- frequency doubling
- enters
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10061—Polarization control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
-
- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
- H01S3/109—Frequency multiplication, e.g. harmonic generation
Abstract
The invention provides a quasi-continuous green laser light-emitting device and a use method thereof, wherein a seed laser light path comprises a laser, and the laser emits seed laser; the seed laser passes through the polarization beam splitter and is divided into a first laser and a second laser; the second laser is ninety degrees to the first laser propagation direction; the first light splitting path comprises a first frequency doubling crystal and a first dichroic mirror; the first laser penetrates through the first frequency doubling crystal to form first frequency doubling laser, and the first frequency doubling laser penetrates through the first double-color mirror and is divided into first useless laser and first monochromatic laser; the first monochromatic laser enters a polarization beam combiner; the second light splitting path comprises a second frequency doubling crystal, a second dichroic mirror and a third dichroic mirror; the second laser penetrates through the second frequency doubling crystal to form second frequency doubling laser, and the second frequency doubling laser penetrates through the second double-color mirror and is divided into second useless laser and second single-color laser; the polarization beam combiner emits synthetic laser, and the technical scheme utilizes a red laser with lower price to obtain green laser.
Description
Technical Field
The invention relates to the technical field of laser welding, in particular to a quasi-continuous green laser light-emitting device and a using method thereof.
Background
Laser welding is an efficient precision welding method using a laser beam with high energy density as a heat source. Laser welding is one of the important directions for the application of laser material processing techniques. The laser welding process belongs to a heat conduction type, namely, the surface of a workpiece is heated by laser radiation, the surface heat is diffused inwards through heat conduction, and the workpiece to be welded is melted by controlling parameters such as the width, the energy, the peak power, the repetition frequency and the like of laser pulse to form a specific molten pool. Due to the unique advantages, the welding method is successfully applied to the precision welding of micro and small parts.
The laser welding usually adopts the high power continuous laser, usually adopts the infrared continuous laser to some accurate sheet welding, because the cold absorption rate of high anti-copper product normal temperature state to 1um wave band laser is very low (nearly 10%), however along with the temperature rise after, the absorptivity can progressively strengthen (until being greater than 40%), from this when adopting the infrared continuous laser to weld high anti-copper product, the yield of molten copper product is crescent in the molten bath, after a large amount of heat was absorbed by the copper product after melting, because the temperature is too high and splashes, seriously influence welding quality. Therefore, laser welding of high reflective copper materials typically requires a blue or green laser.
The blue light wavelength is about 400nm, and a plurality of semiconductor blue light chips are usually coupled into the optical fiber to form the blue light chip, so that the cost is high, the quality of light beams is extremely poor, and the light spot is too large during welding, so that the blue light chip is not suitable for precision welding application.
Therefore, a quasi-continuous green laser for welding high-reflectivity copper materials is needed in the field of laser welding technology.
Disclosure of Invention
In view of the above, the present invention provides a quasi-continuous green laser light emitting device and a method for using the same, wherein a non-polarized (randomly polarized) continuous infrared laser with a narrow line width (spectral width less than 0.5nm) is used as a pre-stage, frequency doubling is performed by polarization splitting and two LBO paths, and finally, polarization synthesis is performed on the converted green laser.
The technical scheme of the invention is realized as follows: a quasi-continuous green laser light-emitting device comprises a seed laser light path, a polarization beam splitter, a first light splitting path, a second light splitting path and a polarization beam combiner, wherein the seed laser light path comprises a laser, and the laser emits seed laser; the seed laser penetrates through the polarization beam splitter and is divided into a first laser and a second laser; the first laser and the seed laser have the same propagation direction, and the second laser and the first laser have the propagation direction of ninety degrees; the first light splitting path comprises a first frequency doubling crystal and a first dichroic mirror; the first laser passes through the first frequency doubling crystal to form first frequency doubling laser, and the first frequency doubling laser passes through the first double-color mirror and is divided into first useless laser and first monochromatic laser; the first monochromatic laser enters a polarization beam combiner; the second light splitting path comprises a second frequency doubling crystal, a second dichroic mirror and a third dichroic mirror; the second laser penetrates through the second frequency doubling crystal to form second frequency doubling laser, and the second frequency doubling laser penetrates through the second double-color mirror and is divided into second useless laser and second single-color laser; the second monochromatic laser is reflected by a third dichroic mirror and then enters a polarization beam combiner; the polarization beam combiner emits the combined laser.
On the basis of the above technical solution, preferably, the polarization beam splitter is a red light polarization beam splitter, and the polarization beam combiner is a green light polarization beam combiner.
On the basis of the technical scheme, preferably, the laser is a narrow-band continuous laser or a single-frequency continuous laser or a nanosecond pulse laser or an ultrafast pulse laser.
On the basis of the above technical scheme, preferably, the seed laser light path further includes a laser amplifier and a laser collimation isolator, and the seed laser light enters the polarization beam splitter after sequentially passing through the laser amplifier and the laser collimation isolator.
On the basis of the above technical solution, preferably, the first optical splitting path further includes a first focusing lens, and the first laser light enters the first frequency doubling crystal after passing through the first focusing lens.
On the basis of the above technical solution, preferably, the first light splitting path further includes a first collimating lens, and the first frequency doubling laser enters the first dichroic mirror after passing through the first collimating lens.
On the basis of the above technical solution, preferably, the second optical splitting path further includes a second focusing lens, and the second laser light enters the second frequency doubling crystal after passing through the second focusing lens.
On the basis of the above technical solution, preferably, the second light splitting path further includes a second collimating lens, and the second frequency-doubled laser enters the second dichroic mirror after passing through the second collimating lens.
On the basis of the above technical solution, preferably, the laser further includes a red light high-reflection mirror, and the second laser light reflected by the red light high-reflection mirror enters the second focusing lens.
On the basis of the above technical solution, it is preferable that the laser further includes a first light-receiving tube and a second light-receiving tube, the first useless laser light enters the first light-receiving tube, and the second useless laser light enters the second light-receiving tube.
Compared with the prior art, the quasi-continuous green laser light-emitting device and the using method thereof have the following beneficial effects:
(1) the laser adopts a quasi-continuous random polarization laser, and the peak power of the finally obtained synthetic laser is high enough after passing through a laser amplifier and a polarization beam combining mirror;
(2) controlling the spectrum width in a narrow range by means of grating mode selection and nonlinear control;
(3) the infrared light is divided into two paths by adopting a first light dividing path and a second light dividing path, the first light dividing path utilizes a first frequency doubling crystal, and the second light dividing path utilizes a second frequency doubling crystal to share the pressure of one frequency doubling crystal;
(4) and a green laser is obtained by using a red laser with lower price.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a light path diagram of a quasi-continuous green laser light-emitting device according to the present invention;
FIG. 2 is a light path diagram of a quasi-continuous green laser light-emitting device according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1-2, a quasi-continuous green laser light emitting device includes a seed laser light path 1, a polarization beam splitter 2, a first light splitting path 3, a second light splitting path 4, and a polarization beam combiner 5.
The seed laser optical path 1, as shown in fig. 1 and fig. 2, includes a laser 11, the laser 11 emits a seed laser 121, the laser 11 may also be a narrow-band continuous laser, a single-frequency continuous laser, a nanosecond pulse laser, or an ultrafast pulse laser, in this embodiment, the laser 11 takes an unpolarized continuous infrared laser whose spectral width is less than 0.1nm as an example, the laser 11 is constructed by using a standard continuous fiber oscillator, a low-reflection grating near an output end is a narrow-band grating, the spectral width of the seed laser 121 is less than 0.1nm, the seed laser 121 output in pulses is formed by adjusting a pumping source current of the laser, the pulse width of the seed laser 121 is 50 us-50 ms, and the output peak power is about 10W; the laser 11 is used as an injection light source of the laser amplifier 12, the required line width is less than 0.1nm, the laser can work by pulse modulation, and the pulse width and the repetition frequency are adjustable.
In order to enable the seed laser 121 emitted by the laser 11 to meet the requirements, as a preferred embodiment, the seed laser optical path 1 further includes a laser amplifier 12 and a laser collimation isolator 13, the seed laser 121 sequentially passes through the laser amplifier 12 and the laser collimation isolator 13 and then enters the polarization beam splitter 2, the laser amplifier 12 amplifies the input seed laser 121, the peak power is amplified to 1KW to 3KW, the average power is amplified to 100W to 500W, and the spectral width of the amplified seed laser 121 is controlled within 0.5 nm; the laser output by the laser amplifier 12 is output through the collimating isolator 13, and the laser is output after collimating the seed laser 121 through the collimating isolator 13, and is used for preventing a part of the seed laser 121 reflected by the optical device from returning to the laser 11 and damaging the laser 11.
The seed laser 121 passes through the polarization beam splitter 2 and is divided into a first laser 122 and a second laser 123; the first laser 122 passes through the polarization beam splitter 2 and then exits, the direction of propagation of the first laser 122 is the same as that of the seed laser 121, the second laser 123 is reflected by the polarization beam splitter 2 and then exits, the direction of propagation of the second laser 123 is ninety degrees from that of the first laser 122, since the laser 11 and the laser amplifier 12 both use non-polarization-maintaining optical fibers, the polarization state of the seed laser 121 is randomly polarized, and since the polarization beam splitter 2 uses a red light polarization beam splitter, the seed laser 121 which is randomly polarized passes through the polarization beam splitter 2 and then is divided into the first laser 122 and the second laser 123, and the first laser 122 and the second laser 123 are orthogonal polarization states.
The first light splitting path 3, as shown in fig. 1 and 2, includes a first frequency doubling crystal 31, a first dichroic mirror 32, a first focusing lens 33, and a first collimating lens 34.
The first laser 122 enters the first frequency doubling crystal 31 after passing through the first focusing lens 33, in this embodiment, the first frequency doubling crystal 31 is a lithium triborate crystal of a double frequency crystal, and the first frequency doubling crystal 31 may further select a triple frequency crystal or a quadruple frequency crystal with a suitable wavelength according to actual needs, so as to avoid waste of the first laser 122 entering the first frequency doubling crystal 31, the first focusing lens 33 is first used to converge the first laser 122.
The converged first laser 122 passes through the first frequency doubling crystal 31 to form a first frequency doubling laser 124, the first frequency doubling laser 124 passes through the first collimating lens 34 and then enters the first dichroic mirror 32, the first frequency doubling laser 124 comprises a frequency doubled green laser and non-frequency doubled infrared light, therefore, the first frequency doubling laser 124 passes through the first dichroic mirror 32 and then is divided into a first useless laser 125 and a first monochromatic laser 126, the first useless laser 125 is non-frequency doubled infrared light, the first monochromatic laser 126 is frequency doubled green laser, the first useless laser 125 passes through the first dichroic mirror 32 and then exits, and the first monochromatic laser 126 is reflected by the first dichroic mirror 32 and then exits.
The red high-reflection mirror 7 is further included, and since the first laser light 122 and the second laser light 123 are in orthogonal polarization states, in order to reduce the volume of the whole structure, the second laser light 123 enters the second focusing lens 44 after being reflected by the red high-reflection mirror 7.
The second laser 123 enters the second frequency doubling crystal 41 after passing through the second focusing lens 44, and in this embodiment, the second frequency doubling crystal 41 is a double-frequency crystal lithium triborate crystal, and a frequency tripling crystal or a frequency quadrupler crystal with a suitable wavelength may also be selected according to actual needs. The second laser 123 passes through the second frequency doubling crystal 41 to form a second frequency doubling laser 127, the second frequency doubling laser 127 passes through the second collimating lens 45 and then enters the second dichroic mirror 42, the second frequency doubling laser 127 comprises a frequency doubled green laser and frequency-doubled infrared light, the second frequency doubling laser 127 passes through the second dichroic mirror 42 and then is divided into a second useless laser 128 and a second monochromatic laser 129, the second useless laser 128 is frequency-doubled infrared light, the second monochromatic laser 129 is frequency-doubled green laser, the second useless laser 128 passes through the second dichroic mirror 42 and then is directly emitted, and the second monochromatic laser 129 is reflected by the second dichroic mirror 42 and then reaches the third dichroic mirror 43.
The second monochromatic laser light 129 is reflected by the third dichroic mirror 43 and then enters the polarization beam combiner 5, and the first monochromatic laser light 126 enters the polarization beam combiner 5; the polarization beam combiner 5 finally emits the combined laser light 130.
The laser welding device further comprises a first light receiving barrel 61 and a second light receiving barrel 62, the first useless laser 125 enters the first light receiving barrel 61, the second useless laser 128 enters the second light receiving barrel 62, and the first useless laser 125 and the second useless laser 128 are infrared lasers which are not needed for welding in the technical scheme, so the infrared lasers belong to useless lasers in the technical scheme. Because infrared laser enters the nature and can generate radiation, influence people's normal life, so utilize first receipts light section of thick bamboo 61 and second to receive a light section of thick bamboo 62 and retrieve, avoid infrared laser to cause light pollution to the environment after the emergence.
The use method of the quasi-continuous green laser light-emitting device of the invention is introduced as follows:
s1, adjustment of seed laser 121:
the laser 11 emits red seed laser 121, and the power of the seed laser 121 is amplified by the laser amplifier 12, passes through the laser collimating isolator 13, and enters the polarization beam splitter 2.
S2, splitting the adjusted seed laser beam 121:
the adjusted seed laser 121 passes through the polarization beam splitter 2 and is divided into a first laser 122 and a second laser 123, where the first laser 122 and the second laser 123 are in orthogonal polarization states.
The first laser light 122 enters the first optical branch path 3, and the second laser light enters the second optical branch path 4.
S3, obtaining green laser light in the first optical branch path 3:
the first laser 122 enters the first frequency doubling crystal 31 after passing through the first focusing lens 33, the first focusing lens 33 converges the first laser 122, the converged first laser 122 forms a first frequency doubling laser 124 after passing through the first frequency doubling crystal 31, the first frequency doubling laser 124 enters the first dichroic mirror 32 after passing through the first collimating lens 34, and the first frequency doubling laser 124 comprises a frequency doubled green laser and an un-frequency doubled infrared light, so that the first frequency doubling laser 124 passes through the first dichroic mirror 32 and is divided into a first useless laser 125 and a first monochromatic laser 126, the first useless laser 125 is the un-frequency doubled infrared light, and the first monochromatic laser 126 is the frequency doubled green laser.
S4, obtaining green laser light in the second optical branch 4:
the second laser 123 is reflected by the red light high-reflection mirror 7 and enters the second focusing lens 44, the second laser 123 passes through the second focusing lens 44 and enters the second frequency doubling crystal 41, the second laser 123 passes through the second frequency doubling crystal 41 and forms a second frequency doubling laser 127, the second frequency doubling laser 127 passes through the second collimating lens 45 and enters the second dichroic mirror 42, the second frequency doubling laser 127 comprises a frequency doubled green laser and an un-doubled infrared light, the second frequency doubling laser 127 passes through the second dichroic mirror 42 and is divided into a second useless laser 128 and a second monochromatic laser 129, the second useless laser 128 is the un-doubled infrared light, and the second monochromatic laser 129 is the frequency doubled green laser.
S5, recovery of unnecessary laser light:
the first waste laser 125 enters the first light-receiving tube 61 and the second waste laser 128 enters the second light-receiving tube 62.
S6, emission of green laser beam:
the second monochromatic laser light 129 is reflected by the third dichroic mirror 43 and then enters the polarization beam combiner 5, and the first monochromatic laser light 126 enters the polarization beam combiner 5; the polarization beam combiner 5 emits the combined laser beam 130.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A quasi-continuous green laser light-emitting device comprises a seed laser light path (1), a polarization beam splitter (2), a first light splitting path (3), a second light splitting path (4) and a polarization beam combiner (5),
the seed laser optical path (1) comprises a laser (11), and the laser (11) emits seed laser (121);
the seed laser (121) is divided into a first laser (122) and a second laser (123) after passing through the polarization beam splitter (2); the first laser (122) and the seed laser (121) are in the same propagation direction, and the second laser (123) and the first laser (122) are in a ninety-degree propagation direction;
the method is characterized in that: the first light splitting path (3) comprises a first frequency doubling crystal (31) and a first dichroic mirror (32);
the first laser (122) penetrates through the first frequency doubling crystal (31) to form first frequency doubling laser (124), and the first frequency doubling laser (124) penetrates through the first dichroic mirror (32) and then is divided into first useless laser (125) and first monochromatic laser (126);
the first monochromatic laser (126) finally enters a polarization beam combiner (5);
the second light splitting path (4) comprises a second frequency doubling crystal (41), a second dichroic mirror (42) and a third dichroic mirror (43);
the second laser (123) passes through the second frequency doubling crystal (41) to form second frequency doubling laser (127), and the second frequency doubling laser (127) passes through the second dichroic mirror (42) and then is divided into second useless laser (128) and second monochromatic laser (129);
the second monochromatic laser (129) is reflected by a third dichroic mirror (43) and finally enters a polarization beam combiner (5);
the polarization beam combiner (5) emits the synthesized laser (130).
2. The quasi-continuous green laser light-emitting device according to claim 1, wherein: the polarization beam splitter (2) is a red light polarization beam splitter, and the polarization beam combiner (5) is a green light polarization beam combiner.
3. The quasi-continuous green laser light-emitting device according to claim 1, wherein: the laser (11) is a narrow-band continuous laser or a single-frequency continuous laser or a nanosecond pulse laser or an ultrafast pulse laser.
4. A quasi-continuous green laser light emitting device as claimed in claim 1, wherein: the seed laser light path (1) further comprises a laser amplifier (12) and a laser collimation isolator (13), and seed laser (121) sequentially passes through the laser amplifier (12) and the laser collimation isolator (13) and then enters the polarization beam splitter (2).
5. The quasi-continuous green laser light-emitting device according to claim 4, wherein: the first light splitting path (3) further comprises a first focusing lens (33), and the first laser (122) enters the first frequency doubling crystal (31) after passing through the first focusing lens (33).
6. The quasi-continuous green laser light-emitting device according to claim 5, wherein: the first light splitting path (3) further comprises a first collimating lens (34), and the first frequency doubling laser light (124) enters the first dichroic mirror (32) after passing through the first collimating lens (34).
7. The quasi-continuous green laser light-emitting device according to claim 6, wherein: the laser device also comprises a red light high-reflection mirror (7), the second light splitting path (4) further comprises a second focusing lens (44), and second laser light (123) reflected by the red light high-reflection mirror (7) passes through the second focusing lens (44) and then enters a second frequency doubling crystal (41).
8. The quasi-continuous green laser light-emitting device according to claim 7, wherein: the second light splitting path (4) further comprises a second collimating lens (45), and the second frequency doubling laser (127) enters the second dichroic mirror (42) after passing through the second collimating lens (45).
9. The quasi-continuous green laser light-emitting device according to claim 8, wherein: the laser device also comprises a first light-receiving tube (61) and a second light-receiving tube (62), wherein the first useless laser (125) enters the first light-receiving tube (61), and the second useless laser (128) enters the second light-receiving tube (62).
10. A method for using a quasi-continuous green laser light-emitting device, which is characterized by using the quasi-continuous green laser light-emitting device of claim 9, comprising the following steps:
s1, adjustment of seed laser (121):
starting a laser (11), wherein the laser emits red seed laser (121), and the power of the seed laser (121) enters a polarization spectroscope (2) after being amplified by a laser amplifier (12) and then passing through a laser collimation isolator (13);
s2, splitting the adjusted seed laser beam (121):
the adjusted seed laser (121) passes through the polarization beam splitter (2) and then is divided into a first laser (122) and a second laser (123), wherein the first laser (122) and the second laser (123) are in orthogonal polarization states;
the first laser (122) enters the first light splitting path (3), and the second laser enters the second light splitting path (4);
s3, obtaining green laser in the first light splitting path (3):
the first laser (122) penetrates through a first focusing lens (33) and then enters a first frequency doubling crystal (31), the first focusing lens (33) converges the first laser (122), the converged first laser (122) penetrates through the first frequency doubling crystal (31) and then forms first frequency doubling laser (124), the first frequency doubling laser (124) penetrates through a first collimating lens (34) and then enters a first dichroic mirror (32), the first frequency doubling laser (124) comprises frequency doubled green laser and frequency-doubled infrared light, therefore, the first frequency doubling laser (124) penetrates through the first dichroic mirror (32) and then is divided into first useless laser (125) and first monochromatic laser (126), the first useless laser (125) is the frequency-doubled infrared light, and the first monochromatic laser (126) is the frequency-doubled green laser;
s4, obtaining green laser in the second light splitting path (4):
the second laser (123) is reflected by the red light high-reflection mirror (7) and then enters the second focusing lens (44), the second laser (123) passes through the second focusing lens (44) and then enters the second frequency doubling crystal (41), the second laser (123) passes through the second frequency doubling crystal (41) and then forms second frequency doubling laser (127), the second frequency doubling laser (127) passes through the second collimating lens (45) and then enters the second dichroic mirror (42), the second frequency doubling laser (127) comprises frequency-doubled green laser and non-frequency-doubled infrared light, the second frequency doubling laser (127) passes through the second dichroic mirror (42) and then is divided into second useless laser (128) and second monochromatic laser (129), the second useless laser (128) is non-frequency-doubled infrared light, and the second monochromatic laser (129) is frequency-doubled green laser;
s5, recovery of unnecessary laser light:
the first useless laser (125) enters the first light receiving tube (61), and the second useless laser (128) enters the second light receiving tube (62);
s6, emission of green laser beam:
the second monochromatic laser (129) is reflected by the third dichroic mirror (43) and then enters the polarization beam combiner (5), and the first monochromatic laser (126) enters the polarization beam combiner (5); the polarization beam combiner (5) emits the synthesized laser (130).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210625565.3A CN115051234A (en) | 2022-06-02 | 2022-06-02 | Quasi-continuous green laser light-emitting device and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210625565.3A CN115051234A (en) | 2022-06-02 | 2022-06-02 | Quasi-continuous green laser light-emitting device and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115051234A true CN115051234A (en) | 2022-09-13 |
Family
ID=83160079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210625565.3A Pending CN115051234A (en) | 2022-06-02 | 2022-06-02 | Quasi-continuous green laser light-emitting device and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115051234A (en) |
-
2022
- 2022-06-02 CN CN202210625565.3A patent/CN115051234A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7807939B2 (en) | Laser welding method and laser welding apparatus | |
| US5982789A (en) | Pulsed laser with passive stabilization | |
| KR101445986B1 (en) | Pulsed laser machining method and pulsed laser machining equipment, in particular for welding, with variation of the power of each laser pulse | |
| JP2009544049A (en) | Method of controlling light source having precisely controlled wavelength conversion average output, and wavelength conversion system | |
| JP2007523499A (en) | Laser equipment | |
| EP4026205B1 (en) | Multi-wavelength adjustable-radial-mode fiber laser | |
| JP2003046173A (en) | Laser, wavelength changing element, laser oscillator, wavelength changing device, and method for laser beam machining | |
| JP2005313195A (en) | Double wavelength superposing type laser beam emission unit, and laser beam machining apparatus | |
| JP2009253068A (en) | Laser oscillating device and laser processing device | |
| KR20040063806A (en) | Green welding laser | |
| CN218887794U (en) | Quasi-continuous green laser light-emitting device | |
| CN112421361A (en) | Ultraviolet ultrafast laser for wood processing | |
| CN115051234A (en) | Quasi-continuous green laser light-emitting device and use method thereof | |
| CN102581485A (en) | Laser welding device | |
| JP2000343254A (en) | Laser beam line patterning method | |
| JP7079953B2 (en) | Wavelength conversion method, wavelength conversion device and laser light source device | |
| He et al. | 30 W output of short pulse duration nanosecond green laser generated by a hybrid fiber-bulk MOPA system | |
| US20220001488A1 (en) | Dual wavelength laser source for material processing applications | |
| EP0904615B1 (en) | Pulsed laser with passive stabilization | |
| Wang et al. | Fiber coupled 1 kW repetitively acousto-optic Q-switched cw-pumped Nd: YAG rod laser | |
| CN110768096A (en) | High-power and high-roundness industrial laser | |
| CN220190119U (en) | Multi-wavelength high-energy hundred picoseconds laser | |
| KR102176048B1 (en) | Apparatus and Method for generating pulse for amplifying maximum output of laser | |
| CN202212693U (en) | Laser welding equipment | |
| WO2021167021A1 (en) | Laser processing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |