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Proceedings Paper

Narrow linewidth UV sources at 257nm
Author(s): Brian Cole; Lew Goldberg; Chris McIntosh; Vernon King; Alan Hays
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Paper Abstract

We describe and compare the performance of two types of compact, passively Q-switched Yb:YAG 1030nm lasers and their use for 257nm fourth harmonic generation (FHG). In the first implementation, an end-pumped Yb:YAG laser produced a 250μJ pulse train with an average power at 1030nm of 3.6W. Using a 10mm LBO crystal (70% doubling efficiency), followed by a 7mm BBO crystal (45% conversion efficiency), 1.1W at 257nm was generated (overall FHG efficiency of 30%). The second implementation was a side-pumped Q-switched Yb:YAG laser pumped by a 200W diode bar. A 10mm KTP crystal followed by a 6mm BBO crystal resulted a 15% FHG conversion efficiency. The UV emission was in a form of 1-5 Hz PRF, 2ms long burst of 0.2mJ pulses with a 30kHz intra-burst PRF. Within a 1.65ms emission window, an 11.5mJ burst at 257 nm was generated that had a maximum intra-burst power of 7W. This paper will address the merits of each approach for realizing a man-portable laser suitable for ultraviolet Raman explosives detection.

Paper Details

Date Published: 17 February 2017
PDF: 10 pages
Proc. SPIE 10082, Solid State Lasers XXVI: Technology and Devices, 100821O (17 February 2017); doi: 10.1117/12.2253910
Show Author Affiliations
Brian Cole, U.S. Army RDECOM CERDEC (United States)
Lew Goldberg, U.S. Army RDECOM CERDEC (United States)
Chris McIntosh, U.S. Army RDECOM CERDEC (United States)
Vernon King, U.S. Army RDECOM CERDEC (United States)
Alan Hays, U.S. Army RDECOM CERDEC (United States)

Published in SPIE Proceedings Vol. 10082:
Solid State Lasers XXVI: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)

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