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Cooling method and cooling device for semi-conductor lamp pump and side pump laser device

A technology of cooling device and cooling method, which is applied to lasers, laser parts, phonon exciters, etc., to achieve the effect of good cooling effect and compact structure

Active Publication Date: 2013-07-24
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to effectively cool the lamp-pumped side-pumped laser with high injection power under the condition that water cooling cannot be used

Method used

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  • Cooling method and cooling device for semi-conductor lamp pump and side pump laser device
  • Cooling method and cooling device for semi-conductor lamp pump and side pump laser device
  • Cooling method and cooling device for semi-conductor lamp pump and side pump laser device

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Effect test

Embodiment 1

[0039] Embodiment 1 adopts the pumping mode of side pump, as attached figure 1 Among them, 3 is the laser cavity, the laser cavity adopts a highly reflective elliptical cylindrical cavity, and the laser rod and the xenon lamp are respectively placed on two focal points. The elliptical structure is based on geometric principles, and the light emitted from one focal point of the ellipse is reflected to the other focal point , therefore, the elliptical cylindrical cavity transfers the emitted energy of the straight tube lamp at one focal line to the laser medium at the second focal point. Laser crystals and xenon lamps are placed in the laser cavity, of which 1 is a laser crystal and 2 is a xenon lamp; in the vertical direction to the laser crystal rod, N slits are evenly opened on the laser cavity, and N rows of spray devices are arranged. Among them, 4, 5, 6, and 7 are 4 rows of spraying devices, wherein N=4; each row of spraying devices is provided with a spraying point every ...

Embodiment 2

[0041] Embodiment 2 adopts the pumping mode of the side pump, as attached figure 2 Among them, 3 is a laser cavity. The laser cavity adopts a tightly coupled elliptical cavity. The distance between the laser rod and the xenon lamp in the elliptical cylinder is very close, and it is usually the pumping cavity with the highest efficiency. There are laser crystals and xenon lamps placed in the laser cavity, of which 1 is the laser crystal and 2 is the xenon lamp; in the vertical direction to the laser crystal rod 1, there are N slits evenly opened on the laser cavity, and N rows of sprays are arranged. device, wherein 4, 5, 6, and 7 are 4 rows of spraying devices, wherein N=4; each row of spraying devices is provided with a spraying device every L1, wherein L1=10mm; the distance between the spraying device and the laser crystal rod The closest distance is L2, where L2=4.5mm; the flow rate of each spray device is P1, where P1=3mL / min; the diameter of the small water droplets prod...

Embodiment 3

[0043] Embodiment 3 adopts the pumping mode of the side pump, as attached image 3 Among them, 3 is a laser cavity, and the laser cavity adopts an out-of-focus cavity, and the laser rod and the xenon lamp are not at the two focal points of the elliptical laser cavity. In an elliptical cylindrical cavity, the radiated light passing through the laser rod will be defocused when it is reflected in the resonant cavity, and will no longer enter the laser rod. Using an out-of-focus cavity, the focus will be slightly improved, but the number of reflections on the cavity wall will increase substantially, so the system efficiency will be very dependent on the reflection of the cavity wall. Laser crystals and xenon lamps are placed in the laser cavity, of which 1 is a laser crystal and 2 is a xenon lamp; in the vertical direction to the laser crystal rod, N slits are evenly opened on the laser cavity, and N rows of spray devices are arranged. Among them, 4, 5, 6, and 7 are 4 rows of spr...

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Abstract

The invention discloses a cooling method for a semi-conductor lamp pump and side pump laser device. The semi-conductor lamp pump and side pump laser device comprises a laser cavity and a laser crystal as well as a xenon lamp which are arranged in the laser cavity, wherein the laser cavity is of an oval shape, and a laser crystal bar and the xenon lamp are placed in a position close to the focus of the oval. The method comprises the following steps that a plurality of atomizing devices are arranged on the cavity wall of the laser cavity, and the atomizing devices are used for spraying water mist towards the laser crystal bar; and an air inlet as well as an air outlet are arranged in the direction parallel to the laser crystal bar in the laser cavity, and the air flow in the laser cavity is enabled to flow from the air inlet to the air outlet. The invention provides a novel composite cooling method and a cooling device with a compact structure and a good cooling effect, so that the effect of carrying out cooling on the semi-conductor lamp pump and side pump laser device which can not be cooled by water in the situation of high injected power is successfully realized.

Description

technical field [0001] The invention belongs to the technical field of solid-state lasers, in particular to a cooling method and a cooling device for semiconductor lamp pump side-pumped lasers, in particular to a cooling method and a cooling device that can be used to realize air cooling under the condition of high injection power, so as to be applied to Places where water cooling is inconvenient, such as lidar systems on aircraft. Background technique [0002] The xenon lamp pumped solid-state laser has a large amount of heat loss, and the laser working substance and the xenon lamp must be cooled. The existing cooling methods include conduction cooling, liquid cooling and air cooling. [0003] In the laser system, conduction cooling is adopted, and the laser rod is directly installed on the heat sink to maintain good thermal contact between the laser rod and the heat sink. The laser rod can be fixed to the heat sink by mechanical clamping, welding or bonding. Due to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/042
Inventor 赵伟芳林学春侯玮于海娟伊肖静李晋闽
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI