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Proceedings Paper

Designing new classes of high-power, high-brightness VECSELs
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Paper Abstract

Optically-pumped vertical external cavity semiconductor lasers offer the exciting possibility of designing kW-class solid state lasers that provide significant advantages over their doped YAG, thin-disk YAG and fiber counterparts. The basic VECSEL/OPSL (optically-pumped semiconductor laser) structure consists of a very thin (approximately 6 micron thick) active mirror consisting of a DBR high-reflectivity stack followed by a multiple quantum well resonant periodic (RPG) structure. An external mirror (reflectivity typically between 94%-98%) provides conventional optical feedback to the active semiconductor mirror chip. The "cold" cavity needs to be designed to take into account the semiconductor sub-cavity resonance shift with temperature and, importantly, the more rapid shift of the semiconductor material gain peak with temperature. Thermal management proves critical in optimizing the device for serious power scaling. We will describe a closed-loop procedure that begins with a design of the semiconductor active epi structure. This feeds into the sub-cavity optimization, optical and thermal transport within the active structure and thermal transport though the various heat sinking elements. Novel schemes for power scaling beyond current record performances will be discussed.

Paper Details

Date Published: 15 October 2005
PDF: 8 pages
Proc. SPIE 5990, Optically Based Materials and Optically Based Biological and Chemical Sensing for Defence II, 599003 (15 October 2005); doi: 10.1117/12.630864
Show Author Affiliations
J. V. Moloney, Univ. of Arizona (United States)
Optical Sciences Ctr./Univ. of Arizona (United States)
A. R. Zakharian, Univ. of Arizona (United States)
Optical Sciences Ctr./Univ. of Arizona (United States)
J. Hader, Univ. of Arizona (United States)
Optical Sciences Ctr./Univ. of Arizona (United States)
Stephan W. Koch, Univ. of Marburg (Germany)


Published in SPIE Proceedings Vol. 5990:
Optically Based Materials and Optically Based Biological and Chemical Sensing for Defence II
Anthony W. Vere; John C. Carrano; Arturas Zukauskas; James G. Grote; Francois Kajzar, Editor(s)

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