A laser absorption tube and a laser

Abstract

This utility model relates to the field of optical equipment technology. More specifically, this utility model relates to a laser absorption cylinder and a laser. The laser absorption cylinder of this utility model has a compact structure and can disperse high-power beams through reflection, reducing energy concentration and preventing the formation of high-temperature points that could burn out the absorber. The diffused and amplified light absorption surface can improve the overall heat dissipation efficiency, solving the problems of existing laser absorption cylinders where prolonged beam irradiation damages the light absorption surface, causing light leakage and slow heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of optical equipment technology. More specifically, this utility model relates to a laser absorption tube and a laser. Background Technology

[0002] In the field of optical technology, light absorption is required in certain situations. For example, in high-power ultraviolet lasers, frequency doubling of the 1064nm infrared laser produces strong green and infrared beams that exit through a filter; at high power, this residual beam needs to be absorbed. Another example is optical modulators, which deflect the beam by changing the refractive index to reduce its frequency; the zeroth-order light in these modulators requires absorption.

[0003] A laser absorption tube is an optical device used for light absorption. Its main function is to absorb excess light energy generated by a laser, preventing damage to optical components. Specifically, laser absorption tubes are commonly used in lasers, especially after second or higher harmonic generators. They absorb residual and useless fundamental light reflected by the laser beam splitter through multiple reflections, thereby reducing the power or energy density of the laser beam incident on the material surface and preventing sputtering and contamination of optical components.

[0004] Existing laser absorption tubes suffer from problems such as light leakage and slow heat dissipation due to damage to the light absorption surface caused by prolonged exposure to the laser beam. Utility Model Content

[0005] The purpose of this invention is to address the above-mentioned problems by providing a laser absorption cylinder and a laser.

[0006] To achieve these objectives and other advantages according to the present invention, a laser absorption tube is provided, comprising a transparent optical medium and an outer cylinder;

[0007] The outer cylinder is open at one end and is fitted onto the transparent optical medium;

[0008] The end of the transparent optical medium away from the opening of the outer cylinder is curved and forms a light-reflecting surface. The inner wall of the outer cylinder is provided with a light-absorbing surface. The laser entering the transparent optical medium is reflected by the light-reflecting surface, passes through the transparent optical medium, and is absorbed by the light-absorbing surface.

[0009] Furthermore, in the laser absorption tube, the transparent optical medium is cylindrical, and a conical notch is coaxially provided at one end of the transparent optical medium away from the opening of the outer cylinder, and the inner wall of the notch forms the light reflecting surface.

[0010] Furthermore, in the aforementioned laser absorption cylinder, the inner wall of the outer cylinder is roughened to form the light absorption surface.

[0011] Furthermore, in the laser absorption cylinder, the inner wall of the outer cylinder is provided with an annular groove, and the annular groove is filled with light-absorbing material to form the light-absorbing surface.

[0012] Furthermore, in the laser absorption tube described above, the transparent optical medium is made of quartz glass.

[0013] Furthermore, in the aforementioned laser absorption cylinder, the outer cylinder is made of metal.

[0014] Furthermore, in the laser absorption cylinder, heat dissipation fins are provided on the outer side of the outer cylinder.

[0015] Furthermore, in the laser absorption cylinder, the outer cylinder has cooling water channels, and water pipes are connected to the inlet and outlet of the cooling water channels.

[0016] Furthermore, in the laser absorption cylinder, a spiral mounting groove is provided on the outer wall of the outer cylinder, and a spiral cooling copper pipe is provided in the mounting groove, with the cooling water channel formed inside the cooling copper pipe.

[0017] This utility model also provides a laser, including a laser absorption tube as described in any of the above claims.

[0018] The beneficial effects of this utility model are:

[0019] The laser absorption tube of this invention has a compact structure and can disperse high-power beams through reflection, reducing energy concentration and preventing the formation of high-temperature points that could burn out the absorber. The diffused and amplified light absorption surface can improve the overall heat dissipation efficiency, solving the problems of existing laser absorption tubes where prolonged beam irradiation damages the light absorption surface, causing light leakage and slow heat dissipation.

[0020] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the laser absorption tube described in one embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of the laser absorption tube described in one embodiment of the present invention.

[0023] The reference numerals in the attached figures are as follows:

[0024] 1. Transparent optical medium; 2. Outer cylinder; 3. Light reflecting surface; 4. Light absorbing surface; 5. Cooling water channel; 6. Water pipe; 7. Cooling copper pipe. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the embodiments, so that those skilled in the art can implement it based on the description.

[0026] It should be noted that in the description of this utility model, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] like Figures 1-2 As shown, an embodiment of the present invention provides a laser absorption tube, comprising a transparent optical medium 1 and an outer cylinder 2;

[0028] The outer cylinder 2 has an opening at one end and is fitted onto the transparent optical medium 1;

[0029] The end of the transparent optical medium 1 away from the opening of the outer cylinder 2 is curved and forms a light reflecting surface 3. The inner wall of the outer cylinder 2 is provided with a light absorbing surface 4. The laser entering the transparent optical medium 1 is reflected by the light reflecting surface 3 and passes through the transparent optical medium 1 and is absorbed by the light absorbing surface 4.

[0030] In this embodiment, the laser enters the transparent optical medium 1 in a direction close to the optical axis of the transparent optical medium 1, and is nearly perpendicular to the end of the transparent optical medium 1 near the opening of the outer cylinder 2. The laser entering the transparent optical medium 1 irradiates any light reflecting surface 3, and total internal reflection is formed on the light reflecting surface 3, reflecting the laser onto the light absorbing surface 4 on the inner wall of the outer cylinder 2, where the laser is absorbed.

[0031] Preferably, in another embodiment of the present invention, the transparent optical medium 1 is cylindrical, and a conical notch is coaxially provided at one end of the transparent optical medium 1 away from the opening of the outer cylinder 2, the inner wall of the notch forming the light reflecting surface 3. The recess on the transparent optical medium 1 is conical and coaxial with it, and the inner wall of the outer cylinder 2 is provided with a light absorbing surface 4.

[0032] In this embodiment, the transparent optical medium 1 is cylindrical, and the recessed portion is a conical shape coaxial with it, forming a conical light-reflecting surface 3 on the transparent optical medium 1. The light-reflecting surface 3 is coaxial with the transparent optical medium 1. Thus, after laser light enters the transparent optical medium 1 from any position near the opening of the outer cylinder 2, it will be reflected back to the light-absorbing surface 4 at the same angle after reflection. This allows for a shorter length of the transparent optical medium 1 and the outer cylinder 2 while maintaining the desired light absorption effect, resulting in a more compact structure for the laser absorption cylinder. The compact structure of the laser absorption cylinder in this embodiment can disperse high-power beams through reflection, reducing energy accumulation and preventing high-temperature burning of the absorber. The amplified light-absorbing surface improves overall heat dissipation efficiency. A negative lens is not required to disperse the beam in front of the absorption cylinder. The conical aperture angle of the recessed portion should be less than 90° and the inner wall should be smooth to achieve total internal reflection on the surface.

[0033] Preferably, in another embodiment of the present invention, the inner wall of the outer cylinder 2 is roughened to form the light-absorbing surface 4.

[0034] Preferably, in another embodiment of the present invention, the inner wall of the outer cylinder 2 is provided with an annular groove, and the annular groove is filled with light-absorbing material to form the light-absorbing surface 4.

[0035] Preferably, in another embodiment of the present invention, the transparent optical medium 1 is made of quartz glass.

[0036] Preferably, in another embodiment of the present invention, the outer cylinder 2 is made of metal.

[0037] In this embodiment, the outer cylinder 2 is made of metal, which allows for faster high spectral transmission to the transparent optical medium 1 without damage from radiation.

[0038] Preferably, in another embodiment of the present invention, heat dissipation fins are provided on the outer side of the outer cylinder 2.

[0039] In this embodiment, by providing heat dissipation fins on the outside of the outer cylinder 2, heat dissipation can be achieved on the outer cylinder 2 when the absorption power of the laser absorption cylinder is not high, and a fan can be used to dissipate heat from the heat dissipation fins, thereby improving the heat dissipation effect of the outer cylinder 2.

[0040] Preferably, as another embodiment of the present invention, the outer cylinder 2 has a cooling water channel 5, and the inlet and outlet of the cooling water channel 5 are connected to water pipes 6.

[0041] In this embodiment, by providing a cooling water channel 5 on the outer cylinder 2, cooling water can be circulated through the cooling water channel 5 to cool the outer cylinder 2, allowing the laser absorption cylinder to use higher absorption power. Specifically, a spiral mounting groove is provided on the outer side wall of the outer cylinder 2, and a spiral cooling copper pipe 7 is provided in the mounting groove, with the cooling water channel 5 formed inside the cooling copper pipe 7. Cooling copper pipes are common pipe materials and have unique advantages in the refrigeration industry, such as air conditioners and refrigerators. The following are some of the main characteristics of copper pipes:

[0042] High thermal conductivity: Copper has excellent thermal conductivity, with a high thermal conductivity coefficient, enabling it to quickly transfer heat and thus improve cooling efficiency. This makes copper tubes perform exceptionally well in applications requiring rapid heat dissipation.

[0043] High pressure resistance: Copper pipes have high pressure resistance and can withstand high water pressure, making them suitable for use in high-pressure environments. This is especially important in hot water systems and cooling systems that need to withstand high pressure.

[0044] Corrosion resistance: Copper tubes have excellent corrosion resistance, enabling them to operate stably in a variety of environments and extending their service life. This makes copper tubes advantageous in cooling systems that require long-term stable operation.

[0045] Uniform heat dissipation: Copper pipes perform exceptionally well in liquid cooling systems, distributing heat evenly and improving heat dissipation efficiency. For example, in mobile phone cooling, the liquid circulation within the copper pipes effectively removes heat, maintaining a stable device temperature.

[0046] This utility model also provides a laser, including a laser absorption tube as described in any of the above claims.

[0047] In this embodiment, the laser absorption tube is installed in the laser optical path to absorb the residual beam after the laser frequency is doubled, and the residual beam generated when the optical modulator adjusts the frequency, phase and propagation direction of the laser beam.

[0048] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and embodiments shown and described herein.

Claims

1. A laser absorption tube, characterized in that, Includes a transparent optical medium and an outer cylinder; The outer cylinder is open at one end and is fitted onto the transparent optical medium; The end of the transparent optical medium away from the opening of the outer cylinder is curved and forms a light-reflecting surface. The inner wall of the outer cylinder is provided with a light-absorbing surface. The laser entering the transparent optical medium is reflected by the light-reflecting surface, passes through the transparent optical medium, and is absorbed by the light-absorbing surface.

2. A laser absorption tube as described in claim 1, characterized in that, The transparent optical medium is cylindrical, and a conical notch is coaxially provided at one end of the transparent optical medium away from the opening of the outer cylinder. The inner wall of the notch forms the light reflecting surface.

3. A laser absorption tube as described in claim 2, characterized in that, The inner wall of the outer cylinder is roughened to form the light-absorbing surface.

4. A laser absorption tube as described in claim 2, characterized in that, The inner wall of the outer cylinder is provided with an annular groove, and the annular groove is filled with light-absorbing material to form the light-absorbing surface.

5. A laser absorption tube as described in claim 1, characterized in that, The transparent optical medium is made of quartz glass.

6. A laser absorption tube as described in claim 1, characterized in that, The outer cylinder is made of metal.

7. A laser absorption tube as described in claim 6, characterized in that, The outer cylinder is equipped with heat dissipation fins on its outer side.

8. A laser absorption tube as described in claim 6, characterized in that, The outer cylinder has cooling water channels, and water pipes are connected to the inlet and outlet of the cooling water channels.

9. A laser absorption tube as described in claim 8, characterized in that, The outer wall of the outer cylinder is provided with a spiral mounting groove, and a spiral cooling copper pipe is provided in the mounting groove, forming the cooling water channel inside the cooling copper pipe.

10. A laser, characterized in that, Includes the laser absorption tube as described in any one of claims 1-9.

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