Laser beam combining device

Abstract

The present invention relates to the field of laser beam combining technology, specifically a laser beam combining device, including a beam combiner and N laser components, each laser component including a TO-packaged laser tube, a 4mm prism, a semi-cylindrical optical mirror, a 4mm×4mm×8mm prism, a 6mm×6mm×8mm prism, a copper sheet and a 45° lens, the laser beam emitted by the TO-packaged laser tube passes through the semi-cylindrical optical mirror for preliminary beam shaping and polarization adjustment, and then is guided by the 4mm prism to turn to the 4mm×4mm×8mm prism, then to the 6mm×6mm×8mm prism, and finally guided to the beam combiner through the 45° lens, the beam combiner receives and combines the laser beams from the N laser components; wherein N is a positive integer greater than or equal to 1, and the number and arrangement of the laser components can be adjusted according to actual needs. The present invention has a simple structure, is easy to manufacture and assemble, and has high beam combining accuracy and good stability.

Description

Technical Field

[0001] The present invention relates to the technical field of laser beam combining, and in particular to a laser beam combining device with simple structure, high beam combining accuracy and good stability. Background Art

[0002] With the continuous development of laser technology, laser beam combining technology has become an important means to improve laser output power and achieve efficient laser processing and measurement. Laser beam combining is a process of coupling multiple laser beams into one beam. Due to the slight differences between the laser components, the combined beam often has problems such as low precision and poor stability, which limits its application in the field of high-precision laser processing and measurement. Although the existing laser beam combining devices can combine multiple beams into one beam, thereby improving the laser output power and brightness, they often have problems such as complex structure, difficult assembly, low beam combining accuracy and poor stability.

[0003] Therefore, it is particularly important to invent a laser beam combining device which has a simple structure, is easy to manufacture and assemble, has high beam combining accuracy and good stability. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention proposes a laser beam combining device which has a simple structure, is easy to manufacture and assemble, has high beam combining accuracy and good stability.

[0005] In order to achieve the above object, the technical solution specifically adopted by the present invention is as follows:

[0006] A laser beam combining device comprises a beam combiner and N laser components, each laser component comprises a TO-packaged laser tube, a 4mm prism, a semi-cylindrical optical mirror, a 4mm×4mm×8mm prism, a 6mm×6mm×8mm prism, a copper sheet and a 45° lens. The laser beam emitted by the TO-packaged laser tube first passes through the semi-cylindrical optical mirror for preliminary beam shaping and polarization adjustment, then is guided by the 4mm prism to be turned to the 4mm×4mm×8mm prism, then turned to the 6mm×6mm×8mm prism for further turning, and finally is guided to the beam combiner through the 45° lens. The beam combiner receives and combines the laser beams from the N laser components; wherein N is a positive integer greater than or equal to 1, and the number and arrangement of the laser components can be adjusted according to actual needs.

[0007] Furthermore, the laser assembly further comprises:

[0008] The laser assembly base is used to support the TO-packaged laser tube, 4mm prism, semi-cylindrical optical mirror, 4mm×4mm×8mm prism and copper sheet to ensure the stability and reliability of the laser assembly;

[0009] The laser assembly support is set under the laser assembly base to support the 6mm×6mm×8mm prism and 45° lens to ensure the relative position between the laser assemblies is accurate;

[0010] The clustering device support is used to support and fix the clustering device.

[0011] Furthermore, the laser assembly base is connected to both sides of the laser assembly support 7 by bolts, the TO-packaged laser tube is located in four holes on both sides of the laser assembly base and is symmetrically fixed, the semi-cylindrical optical mirror is symmetrically placed 12 mm away from the emission point of the TO-packaged laser tube, a pair of 4 mm prisms are placed vertically and parallel in the center of both sides so that the reflected pair of light beams face each other, and the 4 mm × 4 mm × 8 mm prism is located in the center of the laser assembly base with the tip facing the opening.

[0012] Furthermore, the laser assembly support platform can be increased in length according to research needs to increase the optical path. A countersunk structure is provided on the support platform to facilitate fixation on the platform and the laser assembly base. A pair of 6mm×6mm×8mm prisms are placed parallelly at the midline position of the upper surface of the laser assembly support platform to reflect the light beam from the 4mm×4mm×8mm prism and redirect the light beam to the 45° lens at the end of the laser assembly support platform.

[0013] Furthermore, the copper sheet is placed at the pin of the TO-packaged laser tube to dissipate heat and fix the TO-packaged laser tube, thereby ensuring the stability and reliability of the laser assembly during operation.

[0014] Furthermore, a 4.8mm wide and 5mm high boss is provided in the middle of the laser component base, and a rectangular hole is provided in the center for placing a 4mm×4mm×8mm prism; two countersunk holes are symmetrically provided on the short side of one side of the laser component base to facilitate installation and debugging, and bosses are provided on both sides of the countersunk hole at a distance of 7mm from the center, and a 4mm prism is placed in the center of the two bosses.

[0015] Furthermore, the beam combiner is made of a dichroic mirror, which can ensure that the laser beams emitted by lasers of multiple wavelengths are accurately combined into a single beam, and ensure that the combined beam has a high power density and stability.

[0016] Furthermore, the present invention utilizes the spatial three-dimensional arrangement design of the laser tube to reduce the volume of the entire laser and improve space utilization.

[0017] The present invention has the following characteristics and beneficial effects:

[0018] The structure is simple, easy to manufacture and assemble, and the overall size is small and the stability is good. The number and arrangement of laser components can be adjusted as needed to adapt to different laser power and wavelength requirements, which greatly improves the flexibility and applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0020] Figure 1 The figure is a schematic diagram of the structure of a laser beam combining device according to an embodiment of the present invention.

[0021] Figure 2 Schematic diagram of the structure of the laser assembly in an embodiment of the present invention.

[0022] Figure 3 Schematic diagram of the structure of N laser components in the present invention, N=3.

[0023] Figure 4 It is a schematic diagram of the structure of the laser assembly base in the present invention.

[0024] Figure 5 It is a schematic diagram of the structure of the laser assembly support platform in the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of the clustering device support platform in the present invention.

[0026] Figure 7 FIG. 4 is a schematic diagram of a laser beam optical path according to an embodiment of the present invention.

[0027] In the figure: 1-TO packaged laser tube; 2-4mm prism; 3-semi-cylindrical optical mirror; 4-4mm×4mm×8mm prism; 5-6mm×6mm×8mm prism; 6-laser component base; 7-laser component support; 8-copper sheet; 9-45° lens; 10-beam collector; 11-beam collector support. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0029] like Figure 1As shown, a laser beam combining device according to an embodiment of the present invention comprises N laser components, a beam collector 10 and a beam collector support 11. Each laser component comprises a TO-packaged laser tube 1, a 4mm prism 2, a semi-cylindrical optical mirror 3, a 4mm×4mm×8mm prism 4, a 6mm×6mm×8mm prism 5, a laser component base 6, a laser component support 7, a copper sheet 8 and a 45° lens 9. When working, Figure 7 As shown, the laser beam emitted by the TO-packaged laser tube 1 first passes through the semi-cylindrical optical mirror 3 for preliminary beam shaping and polarization adjustment, and then the laser beam is guided by the 4mm prism 2 for the first turn, and then emitted to the 4mm×4mm×8mm prism 4 for the second turn, and then further turned by the 6mm×6mm×8mm prism 5. Finally, the laser beam is guided to the beam collector 10 through the 45° lens 9, and the beam collector 10 receives and combines the laser beams from N laser components to form a single, high-intensity laser beam; wherein N is a positive integer greater than or equal to 1, and the number and arrangement of the laser components can be adjusted according to actual needs.

[0030] like Figure 2 As shown, in a single laser assembly, every 4 TO-packaged laser tubes 1 form a group, which are placed in pairs in four holes on both sides of the laser assembly base 6 at equal distances, and there are 2 groups in total; each group of TO-packaged laser tubes is equipped with a pair of semi-cylindrical optical mirrors 3, a pair of 4mm prisms 2, a pair of 4mm×4mm×8mm prisms 4, a pair of 6mm×6mm×8mm prisms 5 and a pair of 45° lenses 9, the center of the pair of semi-cylindrical optical mirrors 3 is placed 12mm away from the emission point of the corresponding TO-packaged laser tube, a pair of 4mm prisms 2 are placed vertically, parallel and symmetrically in the center of both sides so that the reflected pair of light beams face each other, a pair of 4mm×4mm×8mm prisms 4 are symmetrically arranged in the center of the laser assembly base 6, with the tip facing the opening, and a pair of 6mm×6mm×8mm prisms 5 are placed parallel and upright at the midline position of the upper surface of the laser assembly support, reflecting the light beams from the 4mm×4mm×8mm prisms and redirecting the light beams to the 45° lens 9 located at the end of the laser assembly support.

[0031] like Figure 3 As shown, in the case of N=3, the laser assembly support platform is appropriately lengthened to make the optical path of each group of laser assemblies the same.

[0032] like Figure 4As shown, the laser assembly base 6 is connected to both sides of the laser assembly support 7 by bolts. The laser assembly base 6 is 44.2mm long, 29.6mm wide, and 13.5mm high. A 4.8mm wide and 5mm high equi-height boss is left in the middle, and a 8mm long rectangular hole is left in the center for placing a 4mm×4mm×8mm prism 4. Two countersunk holes with an outer diameter of 6mm, a depth of 3mm, an inner diameter of 3.1mm, and a depth of 2.6mm are symmetrically left on the short side of one side of the laser assembly base 6. A boss with a height of 1mm is set at 7mm from the center on both sides of the laser assembly base 6 in the width direction, and a 4mm prism 2 is placed in the center of the two bosses.

[0033] like Figure 5 As shown, the laser assembly support platform 7 is 87.4mm long, 40mm wide, and 30.1mm high, with a boss of 87.4mm long, 10mm wide, and 20.1mm high in the middle to support the 6mm×6mm×8mm prism 5 and the 45° lens 9. On the platform 10mm high and 52.4mm long from the ground, there are four countersunk holes with an outer diameter of 10.2mm, a depth of 4mm, an inner diameter of 6.1mm, and a depth of 6mm, which are symmetrically placed for fixing. At the same time, two holes with a diameter of 3.1mm are left at the end to be bolted to the laser assembly base 6.

[0034] like Figure 6 As shown, the bottom surface of the clustering device support 11 is an isosceles right triangle with a waist length of 40 mm. At the plane with a height of 10 mm, there is a square boss with a side length of 12 mm and a height of 20.1 at the right angle to support the clustering device 10.

[0035] The technical solution of the present invention is described in detail below in conjunction with specific embodiments:

[0036] Embodiment 1:

[0037] In this embodiment Figure 1 The laser beam combining device includes 6 laser components and a beam combiner. Each laser component includes a TO-packaged laser tube 1, a 4mm prism 2, a semi-cylindrical optical mirror 3, a 4mm×4mm×8mm prism 4, a 6mm×6mm×8mm prism 5, a laser component base 6, a laser component support 7, a copper sheet 8 and a 45° lens 9. Each laser component is assembled and configured according to the above technical solution.

[0038] During the assembly process, the TO-packaged laser tube 1 is first fixed on the laser assembly base 6, and then the semi-cylindrical optical mirror 3, 4mm prism 2, 4mm×4mm×8mm prism 4, 6mm×6mm×8mm prism 5 and copper sheet 8 are installed in sequence. Subsequently, the 45° lens 9 is installed at the end of the laser assembly support 7 to reflect and guide the laser beam into the beam collector 10.

[0039] The laser assembly support 7 is used to support and fix the laser assembly to ensure the relative position between them is accurate. The beam collector support 11 is used to support and fix the beam collector to ensure the stability and accurate position of the beam collector.

[0040] During operation, the TO-packaged laser tubes 1 of the six laser assemblies emit laser beams respectively, which are initially shaped and polarized by the semi-cylindrical optical mirror 3, and then redirected multiple times by the 4mm prism 4, the 4mm×4mm×8mm prism 5, and the 6mm×6mm×8mm prism 5. Finally, the laser beams emitted by the six lasers are reflected and guided by their respective 45° lenses 9, and converged in the beam collector 10 to form a single, high-intensity laser beam.

[0041] In this embodiment, the beam combiner is made of a dichroic mirror, which can ensure that the laser beams emitted by multiple lasers are accurately combined into a single beam.

[0042] During implementation, users can adjust the number and arrangement of laser components according to actual needs to adapt to different laser power and wavelength requirements. At the same time, by optimizing the design of the support and base, the stability and reliability of the device can be further improved.

[0043] In addition, the present invention also provides a variety of preferred implementations, such as increasing the number of laser components, adjusting the specifications and arrangement of prisms, etc., to meet the needs of different application scenarios. These preferred implementations are all based on the core technical solution of the present invention, and through subtle adjustments and optimizations, the performance and applicability of the device are further improved.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A laser beam combining device, comprising a beam combiner (10) and N laser assemblies, characterized in that: Each laser assembly comprises a TO-packaged laser tube (1), a 4mm prism (2), a semi-cylindrical optical mirror (3), a 4mm×4mm×8mm prism (4), a 6mm×6mm×8mm prism (5), a copper sheet (8) and a 45° lens (9). The laser beam emitted by the TO-packaged laser tube (1) first passes through the semi-cylindrical optical mirror (3) for preliminary beam shaping and polarization adjustment, and then is guided by the 4mm prism (2) to the 4mm×4mm×8mm prism (4), and then is directed to the 6mm×6mm×8mm prism (5) for further steering, and finally is guided to the beam collector (10) through the 45° lens (9). The beam collector (10) receives and combines the laser beams from N laser assemblies; wherein N is a positive integer greater than or equal to 1, and the number and arrangement of the laser assemblies can be adjusted according to actual needs.

2. A laser beam combining device as claimed in claim 1, characterized in that: The laser assembly further comprises: A laser assembly base (6) for supporting a TO-packaged laser tube (1), a 4 mm prism (2), a semi-cylindrical optical mirror (3), a 4 mm×4 mm×8 mm prism (4), and a copper sheet (8); A laser assembly support (7) for supporting a 6mm x 6mm x 8mm prism (5) and a 45° mirror (9); and A clustering device support platform (11) is used for supporting and fixing a clustering device (10).

3. A laser beam combining device as claimed in claim 2, characterized in that: The laser assembly base (6) is connected to both sides of the laser assembly support (7) by bolts. The TO-packaged laser tube (1) is located in four holes on both sides of the laser assembly base (6) and is fixed symmetrically. The semi-cylindrical optical mirror (3) is symmetrically placed 12 mm away from the laser emission point of the TO-packaged laser tube. A pair of 4 mm prisms (2) are placed vertically and parallel in the center of both sides so that the reflected pair of light beams face each other. The 4 mm×4 mm×8 mm prism (4) is located in the center of the laser assembly base (6) with its tip facing the opening.

4. A laser beam combining device as claimed in claim 2, characterized in that: A pair of 6mm×6mm×8mm prisms (5) are placed parallel and upright at the center line of the upper surface of the laser assembly support (7), reflecting the light beam from the 4mm×4mm×8mm prism (4) and redirecting the light beam to a 45° lens (9) located at the end of the laser assembly support.

5. A laser beam combining device as claimed in claim 1, characterized in that: The copper sheet (8) is placed at the pins of the TO-packaged laser tube (1) and is used for heat dissipation and fixing the TO-packaged laser tube.

6. A laser beam combining device as claimed in claim 1, characterized in that: The middle of the laser assembly base (6) is provided with an equal height boss with a width of 4.8 mm and a height of 5 mm, and a rectangular hole is provided in the center thereof for placing a 4 mm×4 mm×8 mm prism (4); two countersunk holes are symmetrically provided on one short side of the laser assembly base (6), and bosses are provided on both sides of the countersunk holes at a distance of 7 mm from the center, and a 4 mm prism (2) is placed in the center of the two bosses.

7. A laser beam combining device as claimed in claim 1, characterized in that: The beam combiner (10) is made of a dichroic mirror, which can ensure that the laser beams emitted by multiple lasers are accurately combined into a single beam, and ensure that the combined beam has a high power density and stability.

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