A semiconductor laser side pump module

Abstract

The invention provides a semiconductor laser side pump module, comprising: a semiconductor laser horizontal array Bar (9), a transparent rigid tube and a laser crystal rod (11) placed in the transparent rigid tube, characterized in that the outer circumference of the transparent rigid tube The wall has arc-shaped protruding surfaces (15) evenly distributed in the circumferential direction. The arc-shaped protruding surfaces (15) are continuous in the axial direction and their length matches the length of the semiconductor laser horizontal array Bar (9). The laser horizontal array Bar (9) is evenly arranged around the transparent rigid tube, so that the pumping light emitted by each semiconductor laser horizontal array Bar passes through the corresponding arc-shaped protruding surface (15). The invention can simplify the installation and calibration process, and has a more compact volume; can improve the absorption efficiency of pumping light; and has high reliability and low cost.

Description

technical field [0001] The invention relates to the technical field of solid-state lasers, in particular, the invention relates to a semiconductor laser side pump module. Background technique [0002] Side pumping is one of the main modes to achieve laser pumping at present. Laser side-pumped modules (referred to as side-pumped modules) are generally used for solid-state lasers. The side pumping module of the laser mainly includes the module body, the pumping source (such as Bar bar) and the laser crystal rod. Both the pump source and the laser crystal rod are installed inside the module body, wherein the pump source is used to provide the required pump light, and the laser crystal rod is used to receive the pump light and generate laser radiation under the excitation of the pump light. As all-solid-state lasers show more and more application prospects in the fields of national defense, scientific research, industry, and medical treatment, the semiconductor laser side-pump...

AI Technical Summary

Problems solved by technology

[0006] 1) Complicated assembly

Usually, when the Bars in the side pump module are arranged, they must be consistent vertically and horizontally and surround the laser crystal bar at equal intervals. Correspondingly, the cylindrical lens and shaping mirror must also be consistent vertically and horizontally and surround the laser at equal intervals. At the same time, ensure that the light-emitting surface of the corresponding Bar bar is aligned, otherwise, any deviation in any link will lead to uneven pump light, resulting in low conversion efficiency

Therefore, the pump system has strict requirements on the processing and assembly of mechanical fixed parts. In addition, the use of cylindrical lenses and shaping mirrors also increases the volume of the pump system, which brings inconvenience to subsequent applications.

[0007] 2) Insufficient reliability

Generally speaking, in order to improve the pumping efficiency, the distance between the light-emitting surface of the laser bar and the laser crystal rod is very short, and a cylindrical lens (or a cylindrical lens and a shaping mirror group) is placed in this distance to give the structural package a It is very difficult, and it also restricts the shaping effect and transmission efficiency to a certain extent

Long-time work of the system will inevitably lead to a decrease in the consistency of the arrangement of bars and shaping devices, greatly reducing the reliability of the system

[0008] 3) Low efficiency

The pump light emitted by the bar passes through the cylindrical lens (or multiple times through the cylindrical lens and the shaping mirror group), and it will inevitably lose part of the energy due to surface reflection, refraction and material absorption, which will reduce the overall efficiency of the system

[0009] 4) High cost

This will significantly increase the final cost

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