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Multi-pumping disc laser

A laser and pump light technology, applied in the field of lasers, can solve the problems of inconvenient assembly and adjustment, complex structure, etc., and achieve the effect of effective absorption, compact overall size and light weight

Active Publication Date: 2020-11-13
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the defects of related technologies, the purpose of the present invention is to provide a compact and efficient multi-pumped disk laser, which aims to solve the technical problems of complex structure and inconvenient assembly and adjustment when the existing disk laser realizes a large folding angle range

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0059] In the following, the parabolic surface and the combination of the first folding mirror and the second folding mirror will be taken as an example, and the present invention will be further described in detail with reference to the accompanying drawings. figure 1 It is a schematic diagram of the main structure of the multi-pumped disk solid-state laser according to the present invention when viewed from one direction. Such as figure 1 As shown in exemplarily, the multi-pumped disk solid-state laser according to the present invention mainly includes a pump light source, a disk crystal unit, a multi-pump unit and a resonant cavity unit.

[0060] The pump light source is used to generate collimated pump light. The semiconductor laser stack or pigtailed semiconductor laser that is shaped and output by the optical system can be selected. The cross section of the collimated pump light can be round or square. Or other shapes, the collimated pump light b1 enters the multiple pumping...

Embodiment 2

[0074] Such as Figure 4a As shown, a third folding mirror a4 is placed next to the second folding mirror a2 in Embodiment 1. The light emitted from the third folding mirror a4 is parallel to the incident light, but there will be a displacement in space. The third folding mirror a4 is a hollow right-angle prism composed of two identical right-angle prisms. The thickness of the right-angle prism (the side perpendicular to the right-angle side) and the length of the right-angle side must be greater than or equal to the diameter of the cross-section of the pump light b1. The thickness of the right-angle prisms of the first folding mirror a1 and the second folding mirror a2 should also be greater than or equal to twice the diameter of the cross section of the pump light b1. In this example Figure 4a In this case, the length of the right-angle side of the third folding mirror a4 is set to half the thickness of the right-angle prism of the second folding mirror a2, and this condition...

Embodiment 3

[0083] The size relationship and position relationship of the prism in this embodiment are different from the previous examples, such as Figure 5a As shown, the distance between the two right-angle prisms of the first folding mirror a1 is d, the length of the right-angle prism is L, and the length of the right-angle prisms constituting the second folding mirror a2 is L+d, where L is an integer multiple of d, and the composition The two right-angle prisms of the second folding mirror a2 are symmetrical about the vertical symmetry axis of the disc crystal unit c1, and the right side of the second folding mirror a2 is aligned with the right side of the first folding mirror a1. If the paraboloid is large enough, the number of reflections of the pump light c1 through the disc crystal unit can be calculated Which requires L to be an integer multiple of d. The position of the third folding mirror a4 is moved from the side of the second folding mirror a2 in the second embodiment to th...

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Abstract

The invention discloses a multi-pumping disc laser, and belongs to the technical field of lasers. The multi-pumping disc laser comprises a pump light source, a multi-pumping unit, a disc crystal unitand a resonant cavity output unit, wherein the multi-pumping unit comprises a parabolic reflector, a first folding mirror and a second folding mirror; the parabolic reflector is provided with an openhole; the first folding mirror and the second folding mirror are folding mirrors capable of reflecting by 180 degrees; the disc crystal unit is placed at the focal point of the parabolic reflector; the first folding mirror and the second folding mirror are located on the upper side and the lower side of the disc crystal unit respectively and located on a reflection light path of the parabolic reflector; and the resonant cavity output unit and the disc crystal unit jointly form a laser resonant cavity. Through the design of the single paraboloid and the multiple folding mirrors, the clear aperture for laser transmission in the pumping unit is increased, the laser resonant cavity can be built under the conditions of a large folding angle and a small folding angle at the same time, a multi-round-trip resonant cavity with a larger number of round trips can be built more conveniently, and the output power and the output efficiency of the laser are improved.

Description

Technical field [0001] The present invention belongs to the technical field of lasers, and more specifically, relates to a multi-pumped disc laser. Background technique [0002] The disc laser is one of the high-end high-power solid-state lasers. This sheet-like structure (0.2mm~0.4mm thickness) adopts axial plane cooling, which greatly reduces the thermal distortion and thermal lens effect of the laser crystal. , Which is beneficial to obtain laser output with high conversion efficiency, high average power and high beam quality. However, due to the flake geometry, the short absorption length of the pump light is short. In order to improve the absorption efficiency of the pump light, multiple pumping technology and spot homogenization technology are the core technologies for the efficient and stable operation of high-power disc solid-state lasers. . In 1994, Professor A. Giesen proposed the concept of multiple pumping, which made the idea of ​​discs come true. In 2003, Steffen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/06H01S3/081H01S3/091H01S3/042
CPCH01S3/042H01S3/0604H01S3/081H01S3/091
Inventor 王海林董静陈涵天朱广志朱晓
Owner HUAZHONG UNIV OF SCI & TECH