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A serpentine microchannel heat sink for laser strip crystals

A micro-channel and strip-type technology, applied in the direction of lasers, laser components, laser components, etc., to achieve the effects of weakening temperature gradients, high heat carrying capacity, and small flow differences

Active Publication Date: 2022-07-29
CHINA ACADEMY OF SPACE TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing heat sink structure cannot satisfy these conditions at the same time.

Method used

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  • A serpentine microchannel heat sink for laser strip crystals
  • A serpentine microchannel heat sink for laser strip crystals
  • A serpentine microchannel heat sink for laser strip crystals

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Embodiment Construction

[0040] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments disclosed in the present invention will be described in further detail below with reference to the accompanying drawings.

[0041]One of the core ideas of the present invention is to provide a serpentine microchannel radiator for a laser strip crystal, including a laser strip crystal and two sets of upper and lower serpentine microchannel radiators with the same structure. The upper and lower sides of the strip-type crystal are respectively combined with the bottom heat-absorbing surfaces of the two groups of serpentine microchannel radiators; the serpentine microchannel radiator is a two-layer structure, including a microchannel layer and a cover plate layer; Road snake-type micro-channel structure; the cover layer is provided with an inlet header and an outlet header, which respectively provide the inlet and outlet of the working medium for the microcha...

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Abstract

The invention discloses a serpentine microchannel radiator used for a laser strip crystal, comprising: a laser strip crystal and two sets of upper and lower serpentine microchannel radiators with the same structure; The upper and lower sides are respectively combined with the bottom heat-absorbing surfaces of the two groups of serpentine microchannel radiators; the serpentine microchannel radiator is a two-layer structure, including a microchannel layer and a cover plate layer. The fluid working medium overlaps with the heat dissipation area of ​​the laser strip crystal for many times in the flow direction, and the overall heat dissipation power is high. Along the width direction of the laser strip crystal, the flow directions of the fluid working medium in the upper and lower groups of serpentine microchannel radiators are reciprocal flow; along the length direction of the laser strip crystal, the upper and lower groups of serpentine The flow direction of the fluid working medium in the microchannel radiator can be co-current or counter-current, which significantly improves the temperature uniformity in the elongated crystal.

Description

technical field [0001] The invention belongs to the technical field of laser applications, and in particular relates to a serpentine micro-channel radiator for laser strip-type crystals. Background technique [0002] In solid-state lasers, elongated crystals are often used as gain media. The pump light spot is incident on the narrow end face of the crystal, and a large amount of heat is generated in the crystal when the pump light passes through the crystal. The absorption of the pump light by the crystal generally decays exponentially. Therefore, there is a high local heat flux density in the crystal, and at the same time, there is a large temperature gradient distribution along the light-passing direction. Even with double-end pumping, the internal temperature of the crystal is still higher at both ends and lower in the middle, showing a parabolic distribution. [0003] Crystal thermal effect is a key factor restricting laser power and beam quality. As the power of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/04H01S3/042
CPCH01S3/0407H01S3/042
Inventor 王庆功姚伟毛叶飞
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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