21 October 2004 Continuous-wave intracavity frequency-doubled Nd:YAG-KNbO3 blue laser at 473 nm
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Proceedings Volume 5581, ROMOPTO 2003: Seventh Conference on Optics; (2004); doi: 10.1117/12.582806
Event: ROMOPTO 2003: Seventh Conference on Optics, 2003, Constanta, Romania
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%.
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Nicolaie A. Pavel, Ichiro Shoji, Jiro Saikawa, Takunori Taira, "Continuous-wave intracavity frequency-doubled Nd:YAG-KNbO3 blue laser at 473 nm", Proc. SPIE 5581, ROMOPTO 2003: Seventh Conference on Optics, (21 October 2004); doi: 10.1117/12.582806; https://doi.org/10.1117/12.582806
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KEYWORDS
Crystals

Nd:YAG lasers

Nonlinear crystals

Resonators

Mirrors

Continuous wave operation

Diodes

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