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Direct liquid cooling array type sheet unstable resonant cavity capable of suppressing high-order distortion in cavity

An array type, resonant cavity technology, applied in the direction of laser cooling device, laser parts, laser parts, etc., can solve the problems of complex aberration components, affecting laser transmission, and difficulty in obtaining ideal laminar flow state, etc., to achieve effective heat dissipation Effect of management, high beam quality, simple structure

Active Publication Date: 2020-07-10
INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for direct liquid-cooled lasers, since the laser needs to pass through the flowing liquid, the flow field of the liquid will affect the laser transmission
In actual design, limited by the accuracy of processing and assembly, it is difficult to obtain the ideal laminar flow state in the flow state of the liquid. The flow state in a single flow channel (directly affecting the heat distribution) usually has a certain spatial domain and The high-frequency components in the time domain, through the superposition of dozens or hundreds of flow channels, the aberration components will become extremely complex

Method used

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  • Direct liquid cooling array type sheet unstable resonant cavity capable of suppressing high-order distortion in cavity
  • Direct liquid cooling array type sheet unstable resonant cavity capable of suppressing high-order distortion in cavity
  • Direct liquid cooling array type sheet unstable resonant cavity capable of suppressing high-order distortion in cavity

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Embodiment 1

[0033] This embodiment discloses a direct liquid-cooled array thin slice unstable resonator that can suppress high-order distortion in the cavity, including a direct liquid-cooled array distributed gain module 1, a resonant cavity mirror, a 4f imaging system, and a high-order distortion suppression system and pumping system. The components, structure and functions of each system are as follows:

[0034] Direct liquid-cooled array distributed gain module (hereinafter referred to as gain module): used to generate laser gain. It includes several sheet-type gain media and laser cooling liquid; the core structure is an array of several sheet-type gain media, and micro-channels are formed between adjacent gain media, and the laser cooling liquid flows through the micro-channels, and at the same time, Cool down the gain sheet.

[0035] Pumping system: used to inject pumping light D2 into the gain module 1, so that the gain sheet realizes population inversion to obtain laser gain. ...

Embodiment 2

[0041] This embodiment discloses the structure of a direct liquid-cooled array distributed gain module (hereinafter referred to as a gain module). like image 3 As shown, the gain module 1 includes a plurality of composite crystals (ie gain media) arranged in an array. The composite crystals are fixedly stacked in the module inner frame 20 by the crystal fixing bars 16, and the adjacent composite crystals are separated by the flow channel separators 22. In order to form a flat microchannel, the inner frame 20 of the module is fixed in the outer frame 13 of the module, there is a gap between the inner frame 20 and the outer frame 13 of the module, and light-transmitting windows 14 are provided on opposite sides of the outer frame 13 of the module for transmitting the laser light D1 and The pump light D2, the laser cooling liquid 21 flows through the guide cone 12 into the flat micro-channel formed by the channel separator 22 between the crystals and the gap between the inner an...

Embodiment 3

[0044] This embodiment discloses the structure of the pumping system. The pump system includes at least one set of pump coupling systems, the pump coupling system includes a pump light source 10 and a dichroic beam splitter 11 that match each other, the dichroic beam splitter reflects the pump light D2 and projects the laser light D1, and the dichromatic beam splitter 11 will The pump light D2 outputted by the pump light source 10 is reflected into the gain module 1, and the pumping mode of the large face end is adopted. The pump light source 10 may be one of a diode stack, a diode pigtail output light source, and a flash light source. In one embodiment, there are two pump coupling systems, which are respectively disposed on both sides of the gain module 1 .

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Abstract

The invention discloses a direct liquid cooling array type sheet unstable resonant cavity capable of suppressing high-order distortion in a cavity. The structure of the direct liquid cooling array type sheet unstable resonant cavity comprises a direct liquid cooling array distributed gain module, a resonant cavity mirror, a 4f phase transmission, a diaphragm, a reflection type volume Bragg gratingand a pumping system. The invention aims to overcome the defect of poor light beam quality caused by more high-order distortion introduced by liquid flow of a direct liquid cooling array type sheet laser device. An unstable cavity structure is innovatively changed, a 4f system is introduced into the cavity, and high-order wavefront distortion suppression is realized in the cavity by adopting a mode of combining a diaphragm and a reflective Bragg grating, so that high-beam-quality laser output is obtained. The laser device not only can effectively solve the problem of solid laser thermal management, but also realizes high-beam-quality laser output, and is a novel high-power laser device.

Description

technical field [0001] The invention relates to the technical field of high-energy lasers, and provides a laser output device, in particular a direct liquid-cooled array thin-slice laser unstable resonant cavity capable of suppressing high-order distortion in the cavity. Background technique [0002] High average power all-solid-state lasers play an important role in frontier scientific research, national economy, national security and other fields, and are research hotspots and important directions in the laser field. The severe thermal effect caused by the increase of laser power has become the core problem that limits the high average power and high beam quality laser output of all solid-state lasers. Direct liquid cooling is an effective thermal management method. For example, US Patent No. US7366211B2 discloses a laser directly cooled by liquid, which is implemented by arranging multiple gain media in an array to form a gain module. The method reduces the gain of the m...

Claims

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Application Information

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IPC IPC(8): H01S3/04H01S3/042H01S3/081
CPCH01S3/0407H01S3/042H01S3/08081
Inventor 易家玉阮旭胡浩涂波曹海霞高清松唐淳
Owner INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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