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Proceedings Paper

Temperature-dependent spectroscopy of Ho3+:YVO4 relevant to 2-μm laser operation
Author(s): Z. D. Fleischman; L. D. Merkle; G. A. Newburgh; M. Dubinskii
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Paper Abstract

The spectroscopic properties of Ho3+-doped YVO4 were studied at cryogenic and room temperatures in the 2 μm spectral region to clarify recent observations of efficient dual-wavelength laser operation in this material. Polarized absorption cross sections were measured, and stimulated emission cross sections were determined using the reciprocity method coupled with Füchtbauer-Ladenburg calculations. The observed laser emission wavelengths were at 2041.7 nm, 2054.2 nm, and 2068.5 nm; the first two corresponding to pi transitions and the third to a sigma transition. Gain cross section calculations were used to predict which of the three wavelengths would lase for a given output coupler reflectivity. In depth analysis of the gain cross section in the region between 80 K and 100 K showed that the laser output wavelength is very susceptible to minor changes in temperature.

Paper Details

Date Published: 23 May 2013
PDF: 8 pages
Proc. SPIE 8733, Laser Technology for Defense and Security IX, 87330G (23 May 2013); doi: 10.1117/12.2017758
Show Author Affiliations
Z. D. Fleischman, U.S. Army Research Lab. (United States)
L. D. Merkle, U.S. Army Research Lab. (United States)
G. A. Newburgh, U.S. Army Research Lab. (United States)
M. Dubinskii, U.S. Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 8733:
Laser Technology for Defense and Security IX
Mark Dubinskii; Stephen G. Post, Editor(s)

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