A structure for reducing stress of a solid laser resonator system

Abstract

The utility model discloses a kind of structures for reducing the stress of solid laser resonator cavity system, it is related to solid laser technical field.The utility model includes: heat dissipation system, condensing system, pumping system and resonator cavity system;The resonator cavity system includes resonator cavity pedestal, resonator cavity pressing strip, half mirror, circular arc upper seat, absorber, absorber gland, laser crystal, crystal gland and screw.The utility model is combined with the design of resonator cavity pressing strip and integrated base, and the concentrated stress produced by screw locking is dispersed into uniformly distributed pressure, to effectively inhibit the deformation trend of pedestal, help to keep the stability of resonator cavity end face parallelism, provide structural guarantee for the reliability of laser output performance.Meanwhile, the design of modularization makes the whole resonator cavity become an independent unit, facilitate to realize quick replacement and maintenance, improve production debugging efficiency, and reduce subsequent operation and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of solid-state laser technology, and specifically to a structure for reducing stress in a solid-state laser resonant cavity system. Background Technology

[0002] Solid-state lasers, especially those in the 1064nm band, have wide applications in industry, medicine, and scientific research. Their core performance largely depends on the stability of the resonant cavity system. Traditional resonant cavity systems typically employ a split design, where the laser crystal, absorber, and half-mirror are independently mounted on the pump system using their respective bases (e.g., laser crystal base, absorber base, half-mirror base). This structure means that a pump system can only be matched with one specific resonant cavity, making production debugging, maintenance, and upgrades extremely inconvenient and inefficient.

[0003] To improve the replaceability of resonant cavities, existing technologies propose an integrated solution that combines the laser crystal, absorber, and semi-reflective mirror onto a single resonant cavity base. However, the stability of this solution heavily relies on the parallelism of the two end faces of the resonant cavity base, which is highly susceptible to changes due to stress during assembly and use. The stress on the resonant cavity base primarily originates from internal stress generated during machining, and most critically, the concentrated stress generated by tightening screws when fixing the base to the pump system causes deformation of the base. Currently, the main approach to address this stress problem is to accelerate the release of machining stress through thermal aging or vibration aging. However, this process is time-consuming and cannot effectively eliminate the assembly stress introduced during screw tightening, resulting in incomplete stress release and the long-term stability of the resonant cavity still cannot be reliably guaranteed.

[0004] To address this, a structure for reducing stress in solid-state laser resonator systems is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a structure that reduces stress in a solid-state laser resonator system in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution: a structure for reducing stress in a solid-state laser resonator system, comprising: Heat dissipation system, light focusing system, pumping system, and resonant cavity system; The resonant cavity system includes a resonant cavity base, a resonant cavity pressure bar, a semi-reflective mirror, an arc-shaped upper seat, an absorber, an absorber cover, a laser crystal, a crystal cover, and screws. The resonant cavity base is mounted on the pumping system, and the heat dissipation system and the focusing system are configured in conjunction with the pumping system; The resonant cavity base is provided with a mounting groove for accommodating the absorber, the laser crystal, and the half-mirror; The resonant cavity pressure bar is fixed by the screw, and its bottom surface is pressed against the top surface of the resonant cavity base.

[0007] Furthermore, the resonant cavity pressure bar is a high-hardness metal component, and its length is adapted to the length of the resonant cavity base.

[0008] Furthermore, the absorber is housed in the absorber groove of the resonant cavity base and is secured by the absorber cap and screws.

[0009] Furthermore, the laser crystal is housed in the laser crystal slot of the resonant cavity base and is secured by the crystal cap and screws.

[0010] Furthermore, the semi-reflective mirror is bonded and fixed to the semi-reflective mirror groove of the resonant cavity base by the arc-shaped upper seat.

[0011] Furthermore, the resonant cavity pressure bar is provided with multiple screw through holes, and is fixedly connected to the pump system through the multiple screws, so that the locking force is distributed on the resonant cavity base.

[0012] The beneficial effects of this utility model are as follows: 1. This invention, by introducing a high-hardness resonant cavity pressure strip and cooperating with an integrated resonant cavity base, helps alleviate the deformation problem that may be caused by screw tightening stress in traditional integrated resonant cavities. This pressure strip can transform the concentrated tightening force of the screws into a more evenly distributed pressure on the upper surface of the base, which helps suppress bending deformation of the base, thereby supporting the long-term stability of the parallelism of the two key end faces of the resonant cavity. This has a positive impact on improving the beam quality, power stability, and service life of the output laser.

[0013] 2. This invention integrates the laser crystal, absorber, and semi-reflective mirror onto a single resonant cavity base, facilitating the formation of a complete, easily detachable modular resonant cavity unit. This design allows a single pumping system to be more easily matched with multiple such pre-tuned resonant cavity modules, simplifying production debugging, maintenance, and other processes, thus improving production efficiency, reducing maintenance costs, and meeting diverse application needs. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an exploded view of the structure of this utility model; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is a utility model Figure 3 Exploded view of the structure; Figure 5 This is a schematic diagram of the semi-reflective mirror base structure of this utility model; Figure reference numerals: 1. Heat dissipation system, 2. Focusing system, 3. Pumping system, 4. Resonant cavity system, 5. Absorber base, 6. Semi-reflector base, 7. Semi-reflector, 8. Arc-shaped upper seat, 9. Absorber, 10. Absorber cover, 11. Laser crystal, 12. Crystal cover, 13. Laser crystal base, 14. Screw, 15. Resonant cavity pressure bar, 16. Resonant cavity base. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0019] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. 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.

[0020] like Figures 1 to 5 As shown, a structure for reducing stress in a solid-state laser resonator system includes: The system consists of a heat dissipation system 1, a light-concentrating system 2, a pumping system 3, and a resonant cavity system 4. The resonant cavity system 4 includes a resonant cavity base 16, a resonant cavity pressure bar 15, a half-reflector 7, an arc-shaped upper seat 8, an absorber 9, an absorber cover 10, a laser crystal 11, a crystal cover 12, and screws 14. The resonant cavity base 16 is mounted on the pump system 3, and the heat dissipation system 1 and the focusing system 2 are arranged in conjunction with the pump system 3; The resonant cavity base 16 is provided with a mounting slot for accommodating the absorber 9, the laser crystal 11 and the half-mirror 7; The resonant cavity pressure strip 15 is fixed by screws 14, and its bottom surface is pressed against the top surface of the resonant cavity base 16.

[0021] This invention integrates previously discrete optical components onto a unified resonant cavity base 16, which is then secured by a high-rigidity resonant cavity clamping strip 15. Specifically, the absorber 9, laser crystal 11, and half-mirror 7 are first installed and fixed in their respective slots on the base. Then, the integrated resonant cavity base 16 is placed on the corresponding mounting surface of the pump system 3. Finally, the resonant cavity clamping strip 15 is placed across the base, and multiple screws 14 are threaded through the strip and tightened onto the pump system 3. At this point, the bottom surface of the resonant cavity clamping strip 15 evenly presses against the top surface of the entire resonant cavity base 16.

[0022] The resonant cavity pressure strip 15 is a high-hardness metal component, and its length is adapted to the length of the resonant cavity base 16.

[0023] The resonant cavity pressure strip 15 is preferably made of high-hardness metal materials such as hardened steel or high-grade stainless steel to ensure that it will not bend or deform under the enormous pressure of the locking screws. Its length is designed to match the length of the main stress area of ​​the resonant cavity base 16, and preferably covers the area from the absorber groove to the semi-reflector groove. Therefore, it can provide a rigid "bridge" that can convert the concentrated force of the subsequent locking screws into a uniformly distributed pressure, thereby minimizing the risk of the base warping due to excessive local stress.

[0024] The absorber 9 is housed within the absorber slot of the resonant cavity base 16 and secured by the absorber cap 10 and screws 14. During assembly, the absorber 9 is precisely placed in the specially machined absorber slot on the resonant cavity base 16, and then the absorber cap 10 is placed on top. Multiple screws 14 are used to evenly tighten the cap, thereby firmly pressing the absorber 9 against the bottom of the slot, ensuring its positional accuracy and stability in the optical path.

[0025] The laser crystal 11 is housed in the laser crystal slot of the resonant cavity base 16 and is pressed and fixed by the crystal cover 12 and screws 14.

[0026] The laser crystal 11 serves as the gain medium, and its installation method is similar to that of the absorber 9. It is placed inside the laser crystal slot and secured by the crystal cap 12 and screws 14. This modular installation method ensures that the relative positions of the laser crystal 11, the absorber 9, and the half-reflector 7 are precisely maintained on the same reference resonant cavity base, which is the basis for realizing rapid replacement of the resonant cavity.

[0027] The semi-reflective mirror 7 is bonded and fixed to the semi-reflective mirror slot of the resonant cavity base 16 via an arc-shaped upper seat 8. The semi-reflective mirror 7 is first bonded to the arc-shaped upper seat 8 using optical adhesive. After adjusting the angle and position, the entire arc-shaped upper seat 8 is then bonded to the semi-reflective mirror slot at the end of the resonant cavity base 16 using adhesive. This indirect bonding method facilitates fine-tuning and protection of the critical optical component, the semi-reflective mirror.

[0028] The resonant cavity clamping strip 15 has multiple screw through holes, which are fixedly connected to the pump system 3 by multiple screws 14, distributing the tightening force across the resonant cavity base 16. The resonant cavity clamping strip 15 has at least four screw through holes, preferably symmetrically distributed. During fixing, a torque wrench is used to sequentially and evenly tighten the screws 14 into the threaded holes of the pump system 3 in a diagonal order. This operation transfers the concentrated stress, which would otherwise act directly on the base at several screw points, to the rigid resonant cavity clamping strip 15, which then transforms it into a large-area, evenly distributed downward pressure. This "compression" rather than "locking" method significantly reduces the bending deformation of the resonant cavity base 16, thereby ensuring that the parallelism of its two end faces remains stable during long-term use, thus improving the output beam quality and long-term reliability of the laser.

[0029] In summary, this invention, by introducing a high-hardness resonant cavity pressure strip in conjunction with an integrated resonant cavity base, helps alleviate the deformation problems that may occur in traditional integrated resonant cavities due to screw tightening stress. This pressure strip transforms the concentrated tightening force of the screws into a more evenly distributed pressure on the upper surface of the base, which helps suppress bending deformation of the base, thus supporting the long-term stability of the parallelism of the two key end faces of the resonant cavity. This has a positive impact on improving the beam quality, power stability, and lifespan of the output laser. This invention integrates the laser crystal, absorber, and semi-reflecting mirror onto a single resonant cavity base, facilitating the formation of a complete, easily detachable modular resonant cavity unit. This design allows a single pumping system to more easily match multiple such pre-tuned resonant cavity modules, simplifying production debugging, maintenance, and other processes, and providing convenience for improving production efficiency, reducing maintenance costs, and meeting diverse application needs.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A structure for reducing stress in a solid-state laser resonator system, characterized in that, include: Heat dissipation system (1), light focusing system (2), pumping system (3) and resonant cavity system (4); The resonant cavity system (4) includes a resonant cavity base (16), a resonant cavity pressure bar (15), a half-reflector (7), an arc-shaped upper seat (8), an absorber (9), an absorber cover (10), a laser crystal (11), a crystal cover (12), and screws (14). The resonant cavity base (16) is mounted on the pumping system (3), and the heat dissipation system (1) and the focusing system (2) are configured in conjunction with the pumping system (3); The resonant cavity base (16) is provided with a mounting groove for accommodating the absorber (9), the laser crystal (11) and the half-mirror (7); The resonant cavity pressure bar (15) is fixed by the screw (14), and its bottom surface is pressed against the top surface of the resonant cavity base (16).

2. The structure for reducing stress in a solid-state laser resonator system according to claim 1, characterized in that, The resonant cavity pressure bar (15) is a high-hardness metal component, and its length is adapted to the length of the resonant cavity base (16).

3. The structure for reducing stress in a solid-state laser resonator system according to claim 1, characterized in that, The absorber (9) is housed in the absorber groove of the resonant cavity base (16) and is pressed and fixed by the absorber cover (10) and screws (14).

4. The structure for reducing stress in a solid-state laser resonator system according to claim 3, characterized in that, The laser crystal (11) is housed in the laser crystal slot of the resonant cavity base (16) and is pressed and fixed by the crystal cover (12) and screws (14).

5. The structure for reducing stress in a solid-state laser resonator system according to claim 1, characterized in that, The semi-reflective mirror (7) is bonded and fixed to the semi-reflective mirror groove of the resonant cavity base (16) by the arc-shaped upper seat (8).

6. The structure for reducing stress in a solid-state laser resonator system according to claim 5, characterized in that, The resonant cavity pressure bar (15) is provided with multiple screw through holes, and is fixedly connected to the pump system (3) by multiple screws (14), so that the locking force is distributed on the resonant cavity base (16).

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