Temperature-dependent spectroscopy of Ho3+:YVO4 relevant to 2-μm laser operation

Z. D. Fleischman; L. D. Merkle; G. A. Newburgh; M. Dubinskii

doi:10.1117/12.2017758

23 May 2013 Temperature-dependent spectroscopy of Ho³⁺:YVO₄ relevant to 2-μm laser operation

Z. D. Fleischman, L. D. Merkle, G. A. Newburgh, M. Dubinskii

Proceedings Volume 8733, Laser Technology for Defense and Security IX; 87330G (2013) https://doi.org/10.1117/12.2017758
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

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.

Citation Download Citation

Z. D. Fleischman, L. D. Merkle, G. A. Newburgh, and M. Dubinskii "Temperature-dependent spectroscopy of Ho³⁺:YVO₄ relevant to 2-μm laser operation", Proc. SPIE 8733, Laser Technology for Defense and Security IX, 87330G (23 May 2013); https://doi.org/10.1117/12.2017758

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