Anti-interference narrow-linewidth optical fiber pulse laser
By adding upper and lower shielding shells, partition plates and heat dissipation fans outside the narrow line-wide fiber pulse laser housing, the problem of insufficient heat dissipation is solved, the laser working temperature is reduced, and the service life of the equipment is extended.
Patent Information
- Application Number
- CN202421540959.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The current narrow line-wide fiber pulse laser has insufficient heat dissipation due to the sealing of the metal shell, which leads to excessive internal temperature, affecting its performance and stability.
Add an upper shield case and a lower shield case outside the laser housing, and install a partition plate and a heat dissipation fan inside it to increase the overall heat dissipation surface area of the housing and accelerate heat discharge.
By enhancing the heat dissipation capability, the laser operating temperature is reduced, the thermal stress affects the device, and the service life of the equipment is extended.
Smart Images
Figure CN222673590U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lasers, in particular to an anti-interference narrow-linewidth optical fiber pulse laser. Background Art
[0002] Narrow linewidth fiber pulse laser is a key optical device, and its main structure includes laser medium, optical resonant cavity, pump light source and mode locking device. First of all, the laser medium usually uses erbium-doped or ytterbium-doped optical fiber, which can generate laser radiation after being excited by pump light. The optical resonant cavity is composed of reflectors and coupling devices, which reflects and enhances light of a specific frequency to ensure the stability and single frequency of the laser output. The pump light source provides energy to activate the doped optical fiber, usually using a laser diode or other high-energy light source. The most critical is the mode-locked device, which can ensure the coherence of light in time and frequency, thereby generating pulse output with high peak power and narrow linewidth. When it is working, the optical resonant cavity forms light amplification and radiation through multiple reflections. The dopants in the doped fiber are excited by the pump light to produce controlled laser output. The length and doping concentration of the doped fiber can adjust the output frequency and linewidth of the laser. However, the anti-interference shielding method of the current narrow-linewidth fiber pulse laser is achieved by using its own metal shell, and the metal shell forms a relatively closed space, which limits the effective dissipation of heat to the external environment, resulting in an increase in the internal temperature. This limitation can easily lead to excessive internal temperature of the laser, thereby affecting its performance and stability. Utility Model Content
[0003] The purpose of the utility model is to provide an interference-resistant narrow-linewidth fiber pulse laser, and an upper shielding shell and a lower shielding shell are added to the outside of the laser housing to conduct heat and reduce electromagnetic interference, and partition plates and cooling fans for heat conduction are installed in the upper and lower shielding shells to solve the problems raised in the above-mentioned background technology.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an interference-resistant narrow-linewidth fiber pulse laser, comprising a narrow-linewidth fiber pulse laser body and an upper shielding shell and a lower shielding shell respectively installed at the top and bottom of the narrow-linewidth fiber pulse laser body, the outer walls of both sides of the upper shielding shell and the lower shielding shell are installed with long pin-type bolting structures for locking the two, the internal structures of the upper shielding shell and the lower shielding shell are the same, a partition plate is fixed at one end inside the upper shielding shell, and cooling fans are installed on both sides of the bottom end of the partition plate, a gap portion is arranged between the top surface of the partition plate and the top wall of the upper shielding shell, and array-type wire groove portions are arranged at the corner positions of the top end of the upper shielding shell and the corner positions of the bottom end of the lower shielding shell.
[0005] Preferably, the front and rear outer walls of the upper shielding shell and the lower shielding shell are both provided with rectangular notches for engaging with the narrow linewidth fiber pulse laser body.
[0006] Preferably, a plane portion is provided on the top surface of the upper shielding shell, and outer groove portions are provided on both side outer walls of the upper shielding shell.
[0007] Preferably, copper foil layers are bonded to the inner walls of the upper shielding shell and the lower shielding shell.
[0008] Preferably, the long pin bolting structure includes a first lug and a second lug integrally formed on the left and right outer walls of the upper shielding shell and the lower shielding shell, the projections of the first lug and the second lug on the vertical plane overlap with each other, an internal threaded countersunk hole is provided inside the second lug, and a long screw for threadably mating with the second lug is installed inside the first lug.
[0009] Preferably, through holes are provided on both sides of the surface of the partition plate, and the partition plate is made of aluminum alloy.
[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the interference-resistant narrow-linewidth fiber pulse laser is provided with structures that cooperate with each other, such as a heat dissipation fan and a partition plate. The array-type wire groove part and the outer groove part increase the overall heat dissipation surface area of the shell, thereby evenly dissipating the heat, and the heat dissipation fan accelerates the discharge of heat, reducing the problem of insufficient heat dissipation caused by the metal shell sealing of the narrow-linewidth fiber pulse laser body itself. At the same time, by lowering the operating temperature of the laser and reducing the influence of thermal stress on the device, the purpose of extending the service life of the equipment is achieved. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;
[0012] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;
[0013] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 3 ;
[0014] Figure 4 This is a schematic diagram of the main structure of the utility model;
[0015] Figure 5 It is a schematic diagram of the three-dimensional structure of the upper shielding shell of the utility model.
[0016] In the figure: 1. narrow linewidth fiber pulse laser body; 2. upper shielding shell; 201. plane part; 202. array-type wire slot part; 203. outer slot part; 3. lower shielding shell; 4. rectangular notch; 5. long pin-type bolting structure; 501. first lug; 502. second lug; 503. internal threaded countersunk hole; 504. long screw; 6. copper foil layer; 7. partition plate; 701. through hole; 8. cooling fan. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] See also Figure 1-5 The utility model provides an embodiment: an anti-interference narrow linewidth fiber pulse laser, comprising a narrow linewidth fiber pulse laser body 1 and an upper shielding shell 2 and a lower shielding shell 3 respectively installed at the top and bottom of the narrow linewidth fiber pulse laser body 1, and long pin-type bolting structures 5 for locking the upper and lower shielding shells 2 and 3 are installed on the outer walls of both sides of the upper and lower shielding shells 2 and 3, and the internal structures of the upper and lower shielding shells 2 and 3 are the same, a partition plate 7 is fixed at one end of the interior of the upper shielding shell 2, and cooling fans 8 are installed on both sides of the bottom of the partition plate 7, and through holes 701 are opened on both sides of the surface of the partition plate 7, and the partition plate 7 is made of aluminum alloy. The cooling fan 8 accelerates the discharge of heat from the surface of the narrow linewidth fiber pulse laser body 1;
[0019] A gap is provided between the top surface of the partition plate 7 and the top wall of the upper shielding shell 2, and an array-type wire slot 202 is provided at the corner position of the top end of the upper shielding shell 2 and the corner position of the bottom end of the lower shielding shell 3;
[0020] The front and rear outer walls of the upper shielding shell 2 and the lower shielding shell 3 are both provided with rectangular notches 4 for embedding with the narrow linewidth fiber pulse laser body 1. The rectangular notches 4 are opened according to the width specification of the narrow linewidth fiber pulse laser body 1 to ensure that the upper shielding shell 2 and the lower shielding shell 3 can be just stuck on the narrow linewidth fiber pulse laser body 1;
[0021] The top surface of the upper shielding shell 2 is provided with a plane portion 201, and the outer walls on both sides of the upper shielding shell 2 are provided with outer groove portions 203, and the array-type wire groove portion 202 and the outer groove portion 203 increase the overall heat dissipation surface area of the shell;
[0022] The upper shielding shell 2 and the lower shielding shell 3 not only play the role of mechanical protection and heat dissipation and heat conduction, but also can enhance the device's ability to block external electromagnetic interference, and cooperate with the copper foil layer 6 installed on the inner wall of the shell to effectively prevent the external electromagnetic interference from affecting the internal electronic components and precision optical devices of the device, ensuring the stable operation of the device. The copper foil layer 6 is bonded to the inner walls of the upper shielding shell 2 and the lower shielding shell 3. The copper foil layer 6, as a conductive material, has excellent electromagnetic shielding performance. By bonding to the inner walls of the shielding shell, it can effectively block external electromagnetic interference from entering the interior of the device;
[0023] The long pin bolting structure 5 includes a first lug 501 and a second lug 502 integrally formed on the left and right outer walls of the upper shielding shell 2 and the lower shielding shell 3. The projections of the first lug 501 and the second lug 502 on the vertical plane overlap with each other. An internal threaded countersunk hole 503 is provided inside the second lug 502. A long screw 504 for threaded cooperation with the second lug 502 is installed inside the first lug 501.
[0024] When the long pin bolting structure 5 connects the upper shielding shell 2 and the lower shielding shell 3, the long screw 504 passes through the first lug 501 and is screwed into the internal threaded countersunk hole 503 of the second lug 502. When the staff continues to tighten the long screw 504, the long screw 504 is used to tighten the upper shielding shell 2 and the lower shielding shell 3, so as to achieve the purpose of fastening the two. It allows maintenance personnel to quickly disassemble and reinstall the upper shielding shell 2 and the lower shielding shell 3 without having to significantly disassemble the entire equipment casing.
[0025] When the embodiment of the present application is used, the staff first takes out the upper shielding shell 2 and the lower shielding shell 3 to be connected to the narrow linewidth fiber pulse laser body 1, and the upper shielding shell 2 and the lower shielding shell 3 are respectively installed on the top surface and the bottom surface of the narrow linewidth fiber pulse laser body 1. At this time, the upper shielding shell 2 and the lower shielding shell 3 are connected and fixed by the long pin bolting structure 5, so that the upper shielding shell 2 and the lower shielding shell 3 surround and cover the upper and lower and left and right walls of the narrow linewidth fiber pulse laser body 1 to retain the operation panel at the front end and the interface panel at the rear end of the narrow linewidth fiber pulse laser body 1. When the narrow linewidth fiber pulse laser body 1 is working, the staff turns on the cooling fan 8 to work, and the outer surface of the narrow linewidth fiber pulse laser body 1 The heat on the shell is sent to the gap between the upper shielding shell 2 and the partition plate 7 or the lower shielding shell 3 and the partition plate 7 through the heat dissipation fan 8, and this part of the heat is heat exchanged and conducted with the arrayed wire groove part 202 and the outer groove part 203 on the outer wall of the upper shielding shell 2 and the lower shielding shell 3, so as to achieve the purpose of reducing the operating temperature of the narrow linewidth fiber pulse laser body 1 itself. In this process, the arrayed wire groove part 202 and the outer groove part 203 increase the overall heat dissipation surface area of the shell, thereby evenly dissipating the heat, and the heat dissipation fan 8 accelerates the discharge of heat, reducing the problem of insufficient heat dissipation caused by the metal shell sealing of the narrow linewidth fiber pulse laser body 1 itself, and at the same time, by reducing the operating temperature of the laser and reducing the influence of thermal stress on the device, the purpose of extending the service life of the equipment is achieved.
Claims
1. An anti-interference narrow linewidth fiber pulse laser, characterized in that: The invention comprises a narrow linewidth fiber pulse laser body (1) and an upper shielding shell (2) and a lower shielding shell (3) respectively mounted on the top and bottom of the narrow linewidth fiber pulse laser body (1); long pin-type bolting structures (5) for locking the upper and lower shielding shells (2) are mounted on the outer walls on both sides of the upper shielding shell (2) and the lower shielding shell (3); the upper shielding shell (2) and the lower shielding shell (3) have the same internal structure; a partition plate (7) is fixed at one end of the interior of the upper shielding shell (2); and cooling fans (8) are mounted on both sides of the bottom end of the partition plate (7); a gap is arranged between the top surface of the partition plate (7) and the top wall of the upper shielding shell (2); and array-type wire grooves (202) are arranged at the corner positions at the top end of the upper shielding shell (2) and the corner positions at the bottom end of the lower shielding shell (3).
2. The interference-resistant narrow-linewidth fiber pulse laser according to claim 1, characterized in that: Rectangular notches (4) for engaging with the narrow linewidth fiber pulse laser body (1) are provided on the front and rear outer walls of the upper shielding shell (2) and the lower shielding shell (3).
3. The anti-interference narrow linewidth fiber pulse laser according to claim 1, characterized in that: The top surface of the upper shielding shell (2) is provided with a plane portion (201), and the outer walls on both sides of the upper shielding shell (2) are provided with outer groove portions (203).
4. The anti-interference narrow linewidth fiber pulse laser according to claim 1, characterized in that: Copper foil layers (6) are bonded to the inner walls of the upper shielding shell (2) and the lower shielding shell (3).
5. The anti-interference narrow linewidth fiber pulse laser according to claim 1, characterized in that: The long pin bolting structure (5) comprises a first lug (501) and a second lug (502) integrally formed on the left and right outer walls of the upper shielding shell (2) and the lower shielding shell (3); the projections of the first lug (501) and the second lug (502) on the vertical plane overlap with each other; an internal threaded countersunk hole (503) is arranged inside the second lug (502); and a long screw (504) for threaded cooperation with the second lug (502) is installed inside the first lug (501).
6. The interference-resistant narrow-linewidth fiber pulse laser according to claim 1, characterized in that: Through holes (701) are provided on both sides of the surface of the partition plate (7), and the partition plate (7) is made of a component made of aluminum alloy.