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Proceedings Paper

Continuous-wave intracavity frequency-doubled Nd:YAG-KNbO3 blue laser at 473 nm
Author(s): Nicolaie A. Pavel; Ichiro Shoji; Jiro Saikawa; Takunori Taira
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Paper Abstract

High power blue radiation obtained by intracavity frequency-doubling of a continuous wave diode end-pumped Nd:YAG laser operating on the 4F3/24I9/2 transition is reported. The maximum output power for the randomly polarized beam at 946 nm was 3.7 W for 9.5 W absorbed pump power at 808 nm; the slope efficiency with respect to the absorbed pump power was 44%. For the polarized fundamental radiation the maximum power was 1.1 W (26% optical-to-optical efficiency with respect to the absorbed power), the laser operating with 38% slope efficiency. Intracavity frequency-doubling by a 2.0-mm thick KNbO3 crystal placed in a linear resonator yielded 159-mW single-ended blue-output with optical conversion efficiency versus the absorbed pump power of 4.8%. Using a V-type resonator increased the blue power at 418 mW with 11.6% optical conversion efficiency in absorbed power; the laser optical conversion efficiency was 6.7%, while the conversion of the available infrared power reached 50%.

Paper Details

Date Published: 21 October 2004
PDF: 5 pages
Proc. SPIE 5581, ROMOPTO 2003: Seventh Conference on Optics, (21 October 2004); doi: 10.1117/12.582806
Show Author Affiliations
Nicolaie A. Pavel, Institute for Molecular Science (Japan)
Institute of Atomic Physics (Romania)
Ichiro Shoji, Institute for Molecular Science (Japan)
Jiro Saikawa, Institute for Molecular Science (Japan)
Takunori Taira, Institute for Molecular Science (Japan)

Published in SPIE Proceedings Vol. 5581:
ROMOPTO 2003: Seventh Conference on Optics
Valentin I. Vlad, Editor(s)

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