Abstract

Room-temperature $\mathbf{E}\Vert \mathbf{b}$ and $\mathbf{E}\perp \mathbf{b}$ polarized excited-state absorption (ESA) measurements on ${\mathrm{Mn}}^{6+}$-doped crystals of ${\mathrm{BaSO}}_4$ in the 530–1800-nm spectral region are reported. ESA transitions from the metastable ${ }^2{T}_2$ ligand–field state to the lowest-energy ligand-to-metal charge transfer states involve two-electron excitations and thus carry low intensity. A strong ESA band owing to the first one-electron ligand-to-metal charge transfer transition peaks near 600 nm. Between 700 and 900 nm, ground-state absorption is stronger than ESA, and near-infrared pumping by laser diodes is thus possible. The stimulated-emission cross section is larger than the ESA cross section over the whole range of spontaneous emission. Our results indicate that tunable laser action between 920 nm and 1.6 µm should, in principle, be achievable. The effective peak stimulated-emission cross section at 1100 nm is $3\times {10}^{-19} {\mathrm{cm}}^2.$

© 1997 Optical Society of America

Evaluation of Mn⁵⁺-doped Sr₅(VO₄)₃F as a laser material based on excited-state absorption and stimulated-emission measurements

S. Kück, K. L. Schepler, and B. H. T. Chai
J. Opt. Soc. Am. B 14(4) 957-963 (1997)

Phase-sensitive detection of excited-state absorption transitions in Yb3+-codoped, Ho3+-doped YLiF4

Stefan Kück, Eugen Osiac, and Irena Sokólska
J. Opt. Soc. Am. B 22(2) 323-327 (2005)

Nonlinear spectroscopy and passive Q-switching operation of a Co²⁺:LaMgAl₁₁O₁₉ crystal

K. V. Yumashev, I. A. Denisov, N. N. Posnov, V. P. Mikhailov, R. Moncorgé, D. Vivien, B. Ferrand, and Y. Guyot
J. Opt. Soc. Am. B 16(12) 2189-2194 (1999)

Excited-state absorption in the range of pumping and laser efficiency of Cr⁴⁺:forsterite

N. V. Kuleshov, A. V. Podlipensky, V. G. Shcherbitsky, A. A. Lagatsky, and V. P. Mikhailov
Opt. Lett. 23(13) 1028-1030 (1998)

Fluorescence dynamics, excited-state absorption, and stimulated emission of Er³⁺ in KY(WO₄)₂

N. V. Kuleshov, A. A. Lagatsky, A. V. Podlipensky, V. P. Mikhailov, A. A. Kornienko, E. B. Dunina, S. Hartung, and G. Huber
J. Opt. Soc. Am. B 15(3) 1205-1212 (1998)