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Proceedings Paper

High-brightness-solar-pumped Nd:YAG laser design
Author(s): Mordechai Lando; David G. Jenkins; Hana Bernstein; Joseph J. O'Gallagher; Roland Winston; Allan Lewandowski
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Paper Abstract

We have designed a Nd:YAG laser to be pumped by the High-Flux Solar Furnace (HFSF) at the National Renewable Energy Laboratory. Based on the unique features of the HFSF, the design objectives are high brightness and superior efficiency in primary mirror area utilization. The HFSF has a primary mirror of 11.5 m2 and a 1.85 f-number. With such a high f-number, the target is set off-axis and does not block incoming solar flux. Moreover, large f-number enables concentration which approaches the theoretical limit, and a two- dimensional non-imaging concentrator deposits the solar flux onto the internal part of a 10 mm diameter laser rod. For high brightness, we plan a wide low-loss fundamental mode and a laser rod aperture that suppresses high order modes. To get a fundamental mode, of up to a 2.5 mm waist, we have designed a convex-concave resonator, following well-known g1g2 equals 0.5 design for resonators with internal beam focusing. We have used the edge ray principle to design the concentrator, and ray traced the deposited power inside the laser rod. A 1.3% Nd doping level supports a maximal power deposition inside a 5 mm diameter.

Paper Details

Date Published: 6 June 1995
PDF: 13 pages
Proc. SPIE 2426, 9th Meeting on Optical Engineering in Israel, (6 June 1995); doi: 10.1117/12.211229
Show Author Affiliations
Mordechai Lando, Univ. of Chicago (Israel)
David G. Jenkins, Univ. of Chicago (United States)
Hana Bernstein, Univ. of Chicago (United States)
Joseph J. O'Gallagher, Univ. of Chicago (United States)
Roland Winston, Univ. of Chicago (United States)
Allan Lewandowski, National Renewable Energy Lab. (United States)

Published in SPIE Proceedings Vol. 2426:
9th Meeting on Optical Engineering in Israel
Itzhak Shladov; Yitzhak Wiessman; Natan Kopeika, Editor(s)

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