An investigation of a solid-liquid phase-change-cooled mirror
This article details a new design for a laser-reflecting mirror utilizing phase-change-cooling technology, which is innovative in using spiral cooling ducts filled with solid-liquid phase-change material to maintain a constant temperature inside the reflecting mirror in a positive-branch telescopic,...
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Published in | Journal of modern optics Vol. 52; no. 9; pp. 1319 - 1326 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
London
Taylor & Francis Group
15.06.2005
Taylor & Francis |
Subjects | |
Online Access | Get full text |
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Summary: | This article details a new design for a laser-reflecting mirror utilizing phase-change-cooling technology, which is innovative in using spiral cooling ducts filled with solid-liquid phase-change material to maintain a constant temperature inside the reflecting mirror in a positive-branch telescopic, virtually confocal unstable resonator. The structure no longer needs the 45° scraper plate that is always utilized in a positive-branch telescopic, virtually confocal unstable resonator for coupling the output and provides a high-quality coaxial laser output. The numerical calculation results show, that when phase-change cooling is utilized, the localized maximum temperature dropped from 44 to 33°C. Experiments show that the total surface deformation of a copper mirror dropped from 1.4 µm to 0.27 µm when using phase-change cooling, after continued laser exposure for 10 s and, under the same conditions, that of a silicon mirror dropped from 1.1 µm to 0.4 µm. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0950-0340 1362-3044 |
DOI: | 10.1080/09500340512331337885 |