Grounding method and structure of a slab laser

Abstract

The application relates to a grounding method and structure of a slab laser, one end of a slab laser body is movably grounded, the other end of the slab laser body is fixedly grounded, when the slab laser is heated and expanded or shrunk due to work, the slab laser body can move a certain distance, the slab laser body will not be seriously deformed due to a large counterforce, normal work of the laser is ensured, and the crown spring structure is rationally designed, the grounding guide shaft stably contacts the crown spring, and grounding failure will not occur.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of slab laser, in particular to a grounding method and structure of slab laser. BACKGROUND

[0002] Slab laser is a kind of laser using RF power as excitation source, which is superior to DC excitation discharge gas laser. It can avoid thermal lens effect and thermal light distortion effect, and greatly improve the laser output power.

[0003] Since the slab laser uses RF power as excitation source, the RF transmission mode determines that the negative slab component of the RF laser must have sufficient grounding, otherwise it will cause uneven discharge, unstable discharge and poor discharge matching. Especially for long slabs, more grounding points are needed to ensure the best RF discharge working condition. The common grounding method is to use conductive aluminum sheet to ground. The conductive aluminum sheet is fixed at both ends of the slab laser body by screws, and then fixed to the grounding end by screws. The disadvantage is that the long grounding path increases the inductance, which makes the RF discharge matching worse. Moreover, the part processing is complex and difficult to assemble. In addition, due to the thermal expansion and contraction phenomenon during the operation of the laser, the fixed connection will cause the slab to deform and cannot move, which will bear a larger counterforce and cause greater deformation, affecting the stability of the laser operation. SUMMARY

[0004] In view of the above defects of the prior art, the technical problem to be solved by the present application is to allow a certain movement when the slab heats up. To this end, the present application provides a grounding method and structure of slab laser, and the specific technical solutions are as follows:

[0005] A grounding method of slab laser, one end of the slab laser body is movably grounded, and the other end of the slab laser body is fixedly grounded.

[0006] As a preferred embodiment of the method of the present application, the one end of the slab laser body is fixedly connected with a grounding guide shaft below, the front end of the grounding guide shaft is transversely inserted into a crown spring to achieve movable grounding, and the crown spring is installed in a grounding hole.

[0007] A grounding structure of slab laser, comprising a gas sealing cavity, a slab laser body, a grounding guide shaft, a crown spring, a front gas sealing side plate, a fixed grounding plate and a rear gas sealing side plate. The slab laser body is installed in the gas sealing cavity, the grounding guide shaft is fixedly connected to the front end of the slab laser body, the front gas sealing side plate is provided with a grounding hole, the crown spring is installed in the grounding hole, the front end of the grounding guide shaft is transversely inserted into the grounding hole, the crown spring presses the grounding guide shaft, the fixed grounding plate is fixedly installed at the rear end of the slab laser body, and the fixed grounding plate is fixedly connected to the rear gas sealing side plate.

[0008] As a preferred scheme of the present application, the crown spring comprises a front circular ring part, an intermediate elastic sheet part and a rear circular ring part, the intermediate elastic sheet part is connected behind the front circular ring part, the intermediate elastic sheet part is composed of a plurality of elastic sheets, the elastic sheets are arranged in a circle around the central axis of the crown spring, and the rear circular ring part is connected behind the intermediate elastic sheet part.

[0009] As a preferred scheme of the present application, the elastic sheet is straight at both ends and is bent inward at the middle part, and the elastic sheet is pressed against the grounding guide shaft.

[0010] As a preferred scheme of the present application, the plate laser main body comprises a positive plate, a ceramic waveguide block and a negative plate, the ceramic waveguide block is installed on the side of the positive plate, the negative plate is installed below the positive plate, and the negative plate is movably grounded at one end and fixedly grounded at the other end.

[0011] As a preferred scheme of the present application, the front gas sealing side plate is installed behind the output cavity mirror, and the rear gas sealing side plate is installed in front of the rear cavity mirror.

[0012] As a preferred scheme of the present application, the radio frequency power supply enters from above the gas sealing cavity.

[0013] The plate laser main body is movably grounded at one end and fixedly grounded at the other end, so that when the plate laser expands or shrinks due to work, the plate laser main body can move a certain distance, without being subjected to a large counterforce to cause serious deformation, thereby ensuring normal work of the laser, and the crown spring structure is reasonable, the grounding guide shaft stably contacts the crown spring, and grounding failure does not occur. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic diagram of the present application;

[0015] Figure 2 is Figure 1 is an enlarged view of A in FIG. 4;

[0016] Figure 3 is a perspective view of the crown spring of the present application. DETAILED DESCRIPTION

[0017] The specific embodiments of the present application are further described below in conjunction with the drawings:

[0018] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the positions or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] like Figure 1 As shown, a grounding method for a slab laser is described. One end of the slab laser body 1 is movably grounded, and the other end of the slab laser body 1 is fixedly grounded. Specifically, a grounding guide shaft 2 is fixedly connected to the lower part of one end of the slab laser body 1. A crown spring 3 is inserted laterally into the front end of the grounding guide shaft 2 to achieve movable grounding. The crown spring 3 is installed in the grounding hole 4.

[0021] like Figures 1 to 3 As shown, a grounding structure for a slab laser includes a gas-sealing cavity 5, a slab laser body 1, a grounding guide shaft 2, a crown spring 3, a front gas-sealing side plate 6, a fixed grounding plate 7, and a rear gas-sealing side plate 8. The slab laser body 1 is installed inside the gas-sealing cavity 5. The grounding guide shaft 2 is fixedly connected to the front end of the slab laser body 1. The front gas-sealing side plate 6 has a grounding hole 4, and the crown spring 3 is installed inside the grounding hole 4. The front end of the grounding guide shaft 2 is laterally inserted into the grounding hole 4, and the crown spring 3 presses against the grounding guide shaft 2. The fixed grounding plate 7 is fixedly installed at the rear end of the slab laser body 1, and the fixed grounding plate 7 is fixedly connected to the rear gas-sealing side plate 8. Because the lateral insertion of the front end of the grounding guide shaft 2 into the crown spring 3 is not a tight fit, the grounding guide shaft 2 can move freely laterally within the hole under the force of thermal expansion and contraction of the slab, without generating a reaction force acting on the slab and causing deformation of the slab.

[0022] Specifically, the crown spring 3 includes a front ring portion 31, a middle spring piece portion 32, and a rear ring portion 33. The middle spring piece portion 32 is connected to the rear of the front ring portion 31. The middle spring piece portion 32 is composed of multiple spring pieces arranged circumferentially around the central axis of the crown spring. The rear ring portion 33 is connected to the rear of the middle spring piece portion 32. The two ends of the spring pieces are straight and the middle part is bent inward. The spring pieces press against the ground guide shaft.

[0023] Specifically, the main body 1 of the slab laser includes a positive electrode slab 11, a ceramic waveguide block 12, and a negative electrode slab 13. The ceramic waveguide block 12 is installed on the side of the positive electrode slab 11, and the negative electrode slab 13 is installed below the positive electrode slab 11. One end of the negative electrode slab 13 is movably grounded, that is, a grounding guide shaft 2 is installed at one end of the negative electrode slab 13; the other end is fixedly grounded, that is, a fixed grounding plate 7 is fixedly installed below the other end of the negative electrode slab 13 by screws.

[0024] Specifically, the output mirror is installed behind the front gas sealing side plate 6, the rear mirror is installed in front of the rear gas sealing side plate 8, the RF power source enters from above the gas sealing cavity 5, and the laser output hole of the front gas sealing side plate 10 outputs.

[0025] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application should not be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as falling within the protection scope of the present application.

Claims

1. A grounding structure for a slab laser, characterized in that: The system includes a sealing cavity, a slab laser body, a grounding guide shaft, a crown spring, a front sealing side plate, a fixed grounding plate, and a rear sealing side plate. The slab laser body is installed inside the sealing cavity. The grounding guide shaft is fixedly connected to the front end of the slab laser body. The front sealing side plate has a grounding hole, and the crown spring is installed in the grounding hole. The front end of the grounding guide shaft is laterally inserted into the crown spring to achieve movable grounding. The crown spring presses against the grounding guide shaft. The lateral insertion of the crown spring into the front end of the grounding guide shaft is not a tight fit. The grounding guide shaft can move freely laterally within the hole under the force of thermal expansion and contraction of the slab. The fixed grounding plate is fixedly installed at the rear end of the slab laser body. The fixed grounding plate is fixedly connected to the rear sealing side plate. The crown spring includes a front circular ring, a middle spring piece, and a rear circular ring. The middle spring piece is connected to the rear of the front circular ring. The middle spring piece is composed of multiple spring pieces arranged circumferentially around the central axis of the crown spring. The rear circular ring is connected to the rear of the middle spring piece. The spring pieces are straight at both ends and curved inward in the middle. The spring pieces press against the grounding guide shaft. The main body of the slab laser includes a positive electrode slab, a ceramic waveguide block, and a negative electrode slab. The ceramic waveguide block is installed on the side of the positive electrode slab, and the negative electrode slab is installed below the positive electrode slab. One end of the negative electrode slab is movably grounded, and the other end is fixedly grounded.

2. The grounding structure of a slab laser according to claim 1, characterized in that: An output endoscope is installed behind the front sealing side plate, and a rear endoscope is installed in front of the rear sealing side plate.

3. The grounding structure for a slab laser according to claim 1, characterized in that: The radio frequency power supply enters from above the sealed cavity.

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