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Lateral pump module of semiconductor module

A laser and semiconductor technology, applied in the laser field, can solve the problem of poor pumping uniformity, achieve the effect of solving the problem of pumping uniformity, reducing thermal effects, and improving beam quality

Inactive Publication Date: 2012-07-04
BEIJING GK LASER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since this method needs to reflect back again to form multiple absorptions, although the pumping efficiency is improved, the pumping uniformity is not as good as the previous two methods.

Method used

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  • Lateral pump module of semiconductor module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment ( 1

[0040] figure 1 After the middle pump source 1 uses three-directional pump crystal rods, the distribution of pump fluorescence presents a triangular shape, thereby realizing the use of the three-directional surround pump source 1 to improve pumping uniformity.

[0041] as figure 1 A further modification of the structure shown in, figure 2 In the middle, the pump source 1 is deviated from the optical axis of the crystal rod 5 at a certain angle to form an off-axis pump, and the pump uniformity is further improved due to the presence of a certain dislocation overlapping area of ​​the pump light.

[0042] Among them, n is the number of pumping directions, N is the number of equivalent pumping directions, Δ is the number of rotations around the crystal rod, θ is the rotation angle along the optical axis of the crystal rod, and n is optional in the range of 1 to 10.

Embodiment ( 2

[0044] Due to the limitation of the size of semiconductor lasers, it is impossible to realize multi-directional compact pumping structures such as four-directional, five-directional, six-directional, seven-directional, and nine-directional. Therefore, the present embodiment (2) is a modification of the embodiment (1), which rotates the pump source 1 in the embodiment (1) at an angle of 60° along the optical axis of the crystal rod 5, so that the rotated The pumping structure is equivalent to a six-way pumping structure.

[0045] That is, will figure 1 After the pump source 1 of the three-way pump is rotated along the optical axis of the crystal rod by an angle of θ=60°, it is equivalent to a six-way pump structure.

[0046] as image 3 A further modification of the structure shown in, Figure 4 In the middle, the pump source 1 is deviated from the optical axis of the crystal rod 5 at a certain angle to form an off-axis pump. Since the pump light has a certain dislocation ov...

Embodiment ( 3

[0049] This embodiment is the same as embodiment (two), and is also a modification of embodiment (one).

[0050] Figure 5 In the above, the pump source 1 surrounds the crystal rod 5 at equal intervals, and the figure 1 The pumping source of the three-way pumping structure rotates twice along the optical axis of the crystal rod 5, and rotates 40° each time. The pumping structure after rotation is equivalent to the nine-way pumping structure, which greatly improves the uniformity of the pumping. sex.

[0051] as Figure 5 A further variant of the structure shown in the figure, Figure 6 The pumping source 1 is deviated from the optical axis of the crystal rod 5 at a certain angle to form off-axis pumping, and the pumping uniformity can be further improved because the pumping light has a certain dislocation overlapping area.

[0052] Similarly, in the present embodiment (3), an off-axis pump coupling structure can also be used, that is, the pump source 1 and the center of th...

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Abstract

The invention discloses a lateral pump module of a semiconductor module, which is used for improving evenness of a pump and is fixed on a base plate of the laser through a mechanical fixing piece. The lateral pump module comprises a diffuse reflection cavity and a pump source, wherein the diffuse reflection cavity comprises a cavity body, a quartz glass tube arranged in the cavity body and a crystal rod arranged in the quartz glass tube in the cavity body, and a plurality of light-through slits are arranged on the cavity body at intervals. The pump source comprises a plurality of lighting units arranged in the light-through slits. In addition, a water flow channel is arranged between the quartz glass tube and the crystal rod. The lateral pump module has the advantages obtaining a multi-direction pump by adjusting the axial intersection angle of the pump source and the crystal rod, further adopting an off-axis pump and resolving the problem of pump evenness.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a side pump module of a semiconductor laser that can improve pump uniformity. Background technique [0002] In recent years, all-solid-state lasers have been widely used in advanced manufacturing, medical treatment, communication and other fields due to their small size, light weight, high efficiency, stable performance, good reliability, and high beam quality. According to the classification of pumping methods, all-solid-state lasers can be divided into end-pumped and side-pumped types; among them, end-pumped has the advantages of good mode matching and high optical conversion efficiency, but due to the limitation of fracture stress, it cannot obtain high Power and high beam quality laser output, although in the end-pumped type, the slab laser reduces the fracture stress due to the large heat dissipation area, but because of the astigmatism of the output spot, it is not suitable ...

Claims

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Application Information

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IPC IPC(8): H01S5/04H01S5/10
Inventor 樊仲维康治军石朝辉王培峰闫晓超周密
Owner BEIJING GK LASER TECH
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