Trichromatic laser

Abstract

The utility model provides a kind of three-color laser, including base, sleeve and lens, base includes pedestal, end cap and three laser chips, three laser chips are installed on the heat sink on base, heat sink and laser chip are located in end cap, sleeve is set on top surface, end cap is located in second accommodating cavity, lens is set in second through hole, first through hole is communicated with second through hole, lens is provided with three light-transmitting convex parts, one light-transmitting convex part is opposite to one laser chip.By integrating three laser chips arrangement on the heat sink of a pedestal, then through the packaging of end cap, and through lens fixedly arranged on sleeve, by the connection of sleeve and base, then the relative position of lens and laser chip is fixed, and by the three light-transmitting convex parts set in lens are respectively opposite to laser chip, then the light path adjustment of the laser output by each laser chip through light-transmitting convex part makes each laser beam in predetermined position beam combination.

Description

Technical Field

[0001] This utility model relates to the field of lasers, specifically to a three-color laser. Background Technology

[0002] With the development of optoelectronic technology, lasers are widely used in industrial, communication, military, and medical fields. Due to the low power of a single laser chip, multiple chips are usually used for spatial and wavelength beam combining to meet total power or wavelength requirements. Currently, common multi-chip packaging forms include TO-CAN packaging and butterfly packaging. TO-CAN packaging is generally used for a single laser chip, while butterfly packaging is generally used for packaging multiple chips and focusing multiple beams of light onto optical fibers or window outputs.

[0003] Current methods for focusing multicolor lasers typically employ multiple monochromatic lasers, with each monochromatic laser corresponding to a lens. The optical paths of the multicolor lasers are adjusted to combine them into a single beam. As a result, existing technologies suffer from complex structures and cannot further reduce the size of the beam. Utility Model Content

[0004] The purpose of this invention is to provide a simple and compact three-color laser.

[0005] To achieve the purpose of this utility model, a three-color laser is provided, including a base, a sleeve, and a lens. The base includes a pedestal, an end cap, and three laser chips. The bottom surface of the base is provided with pins, and the top surface of the base is provided with a heat sink. The three laser chips are disposed on the heat sink. The end cap forms a first receiving cavity, and the first receiving cavity has a first through hole through it along the output direction. The end cap is disposed on the top surface, and the heat sink and the three laser chips are located inside the first receiving cavity. The three laser chips are arranged facing the first through hole. The sleeve forms a second receiving cavity, and the second receiving cavity has a second through hole through it along the output direction. The sleeve is disposed on the top surface, and the end cap is located inside the second receiving cavity. The lens is disposed at the second through hole, and the first through hole communicates with the second through hole. The lens has three light-transmitting protrusions, one of which is opposite to one laser chip.

[0006] A further proposed solution is to provide a positioning step on the outer edge of the second through hole of the tube sleeve, and to place the lens inside the positioning step; the three-color laser includes a pressure plate, and the pressure plate is provided with a third through hole along the output direction. The third through hole is connected to the second through hole, the pressure plate is connected to the outer end face of the tube sleeve, the pressure plate covers the outer side of the positioning step, and the edge of the third through hole is matched with the lens for limiting.

[0007] A further improvement is that the base has multiple positioning grooves on its radial circumferential wall, and the sleeve has multiple positioning posts with a clearance fit between the positioning posts and the positioning grooves.

[0008] A further proposed solution is to install multiple positioning posts on the bottom surface of the sleeve, with the bottom surface of the sleeve adjacent to the top surface of the base.

[0009] A further approach is to arrange the cross-section of the positioning groove in an arc or rectangular shape.

[0010] A further proposed solution is to have three light-transmitting protrusions located on the outer end face of the lens.

[0011] A further approach is to arrange the inner end face of the lens as a flat end face.

[0012] The beneficial effects of this utility model are as follows: by integrating three laser chips on a heat sink of a base, then encapsulating them with end caps and fixing them to a sleeve with lenses, and connecting the sleeve to the base, the relative positions of the lens and the laser chips are fixed. Furthermore, by having three light-transmitting protrusions on the lens respectively aligned with the laser chips, the laser output from each laser chip undergoes optical path adjustment through the light-transmitting protrusions, allowing each laser beam to be combined at a predetermined position. This combined beam can then be synthesized into a single beam via a coupler or lens. Additionally, the use of positioning steps and pressure plates facilitates the assembly and fixing of the lens, and the gap fit between the positioning post and the positioning groove further facilitates the fixing and assembly of the sleeve, thereby improving the stability of the laser. Attached Figure Description

[0013] Figure 1 This is a structural diagram of an embodiment of the three-color laser of this utility model.

[0014] Figure 2 This is an exploded view of an embodiment of the three-color laser of this utility model.

[0015] Figure 3 This is an exploded view of an embodiment of the three-color laser of this utility model from another perspective.

[0016] Figure 4 This is a cross-sectional view of an embodiment of the three-color laser of this utility model.

[0017] Figure 5 This is a schematic diagram of beam combining in an embodiment of the three-color laser of this utility model.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0019] Reference Figures 1 to 4The tri-color laser includes a base 1, a sleeve 2, a lens 3, and a pressure plate 4. The base 1 includes a base 11, an end cap 12, and three laser chips 112. The bottom surface of the base 11 is provided with pins 114, and the top surface of the base 11 is provided with a heat sink 111. The three laser chips 112 are disposed on the heat sink 111, and each laser chip 112 is wired to a corresponding pin. The end cap 12 forms a first receiving cavity 121. The first receiving cavity 121 has a first through hole 122 through it along the output direction X. The end cap 12 is disposed on the top surface of the base 11. The heat sink 111 and the three laser chips 112 are located in the first receiving cavity 121. The three laser chips 112 are arranged facing the first through hole 122. The three laser chips 112 are used to output laser along the output direction X.

[0020] The sleeve 2 forms a second receiving cavity 21. The second receiving cavity 21 has a second through hole 22 extending through it in the output direction X. The sleeve 2 has a positioning step 23 on the outer edge of the second through hole 22. The lens 3 is placed inside the positioning step 23 and is located at the second through hole 22. The pressure plate 4 has a third through hole 41 extending through it in the output direction X. The third through hole 41 communicates with the second through hole 22. The pressure plate 4 is connected to the outer end face of the sleeve 2. The pressure plate 4 covers the outer side of the positioning step 23. The edge of the third through hole 41 is matched with the lens 3 to limit its movement, thereby preventing the lens 3 from dislodging from the positioning step 23.

[0021] The base 11 has multiple positioning grooves 113 on its radial peripheral wall, and the bottom surface of the sleeve 2 has multiple positioning posts 24. In this embodiment, there are three positioning grooves 113 and positioning posts 24. Two of the positioning grooves 113 and two of the positioning posts 24 have arc-shaped cross-sections, and the other positioning groove 113 and the positioning post 24 have rectangular cross-sections. The sleeve 2 is placed on the top surface of the base 11, and the corresponding positioning post 24 is clearance-fitted with the positioning groove 113. The bottom surface of the sleeve 2 is adjacent to the top surface of the base 11, and the end cap 12 is located in the second receiving cavity 21.

[0022] The first through hole 122, the second through hole 22, and the third through hole 41 are connected along the output direction X. The lens 3 is provided with three light-transmitting protrusions 31, which are located on the outer end face of the lens 3. The inner end face of the lens 3 is arranged as a flat end face 32. Each light-transmitting protrusion 31 is opposite to a laser chip 112. The three light-transmitting protrusions 31 are arranged outward, while the flat end face 32 is arranged inward. Of course, in other embodiments, the light-transmitting protrusions are arranged inward, while the flat end face is arranged outward, which can also achieve the purpose of this invention.

[0023] Reference Figure 5Three laser chips 112 emit lasers of different wavelengths or colors, such as RGB lasers. The three lasers pass through their corresponding light-transmitting protrusions 31 and their corresponding different curvatures, thus converging the lasers at a preset point. The light-transmitting protrusions on both sides focus the lasers to the focal point in an off-axis manner, and a coupling device, which can be an optical fiber, is arranged at this point to realize the combined transmission of the three lasers.

[0024] As can be seen from the above, by integrating three laser chips onto a heat sink on a base, then encapsulating them with end caps, and fixing them onto a sleeve with lenses, the relative positions of the lenses and laser chips are fixed through the connection between the sleeve and the base. The three light-transmitting protrusions on the lenses are respectively aligned with the laser chips, and the laser output from each laser chip is adjusted through the light-transmitting protrusions, allowing each laser beam to be combined at a predetermined position. This combined beam can then be synthesized into a single beam through a coupler or lens. Furthermore, the use of positioning steps and pressure plates facilitates the assembly and fixing of the lenses, and the gap fit between the positioning posts and positioning slots also facilitates the fixing and assembly of the sleeve, thereby improving the stability of the laser.

Claims

1. A three-color laser, characterized in that, include: The base includes a base, an end cap, and three laser chips. The bottom surface of the base is provided with pins, and the top surface of the base is provided with a heat sink. The three laser chips are disposed on the heat sink. The end cap forms a first receiving cavity. The first receiving cavity has a first through hole through it along the output direction. The end cap is disposed on the top surface. The heat sink and the three laser chips are located in the first receiving cavity. The three laser chips are arranged facing the first through hole. A sleeve is provided to form a second receiving cavity, and a second through hole is provided through the second receiving cavity along the output direction. The sleeve is disposed on the top surface, and the end cap is located inside the second receiving cavity. The lens is disposed at the second through hole, the first through hole is connected to the second through hole, and the lens is provided with three light-transmitting protrusions, one of which is opposite to one of the laser chips.

2. The tri-color laser according to claim 1, characterized in that: The sleeve has a positioning step on the outer edge of the second through hole, and the lens is disposed in the positioning step; The tri-color laser includes a pressure plate with a third through hole extending through it along the output direction. The third through hole communicates with the second through hole. The pressure plate is connected to the outer end face of the sleeve. The pressure plate covers the outside of the positioning step. The edge of the third through hole is matched with the lens for limiting.

3. The tri-color laser according to claim 1, characterized in that: The base has multiple positioning grooves on its radial peripheral wall, and the sleeve has multiple positioning posts, with the positioning posts and positioning grooves having clearance fit.

4. The tri-color laser according to claim 3, characterized in that: Multiple positioning posts are disposed on the bottom surface of the sleeve, and the bottom surface of the sleeve is adjacent to the top surface of the base.

5. The tri-color laser according to claim 3, characterized in that: The positioning groove has an arc-shaped or rectangular cross-section.

6. The three-color laser according to any one of claims 1 to 5, characterized in that: The three light-transmitting protrusions are located on the outer end face of the lens.

7. The tri-color laser according to claim 6, characterized in that: The inner end face of the lens is arranged as a flat end face.

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