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Optical Engineering

Laser performance study of mixed vanadate crystals Nd:YxGd1-xVO4 with direct and indirect pumping
Author(s): Nils C. Fernelius; Yuanji Tang; Thomas S. Hartwick; Suning Tang
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Paper Abstract

We present, for the first time, comparative studies of laser performance in the mixed vanadate crystals Nd:YxGd1-xVO4 with direct and indirect pumping. A series of mixed vanadate crystals Nd:YxGd1-xVO4 with different yttrium and gadolinium composition ratios but the same Nd3+ dopant level is prepared under the same fabrication processes and their laser performance in the TEM00 mode operation is studied using the same experimental configuration under direct pumping with laser diodes at 880 nm as well as indirect pumping at 808 nm. Remarkable improvement in laser efficiency and maximum achievable output power is achieved under direct 880-nm excitation over indirect 808-nm excitation. The maximum optical slope efficiency in the TEM00 mode operation is 74% with direct 880-nm pumping, which also produces the maximum overall optical-to-optical conversion efficiency of 59%. The maximum attainable laser power is up to 50% higher under direct 880-nm pumping over the more conventional 808-nm pumping. These achieved results provide valuable insight into crystal composition selection and pump schemes for the mixed vanadate crystals, which have the potential to tailor laser parameters through crystal composition engineering.

Paper Details

Date Published: 1 December 2008
PDF: 8 pages
Opt. Eng. 47(12) 124201 doi: 10.1117/1.3041762
Published in: Optical Engineering Volume 47, Issue 12
Show Author Affiliations
Nils C. Fernelius, Air Force Research Lab. (United States)
Yuanji Tang, Crystal Research, Inc. (United States)
Thomas S. Hartwick, Crystal Research, Inc. (United States)
Suning Tang, Crystal Research, Inc. (United States)


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