EXCITED-STATE ABSORPTION AND LASER POTENTIAL OF MN6-DOPED BASO4 CRYSTALS()

BRUNOLD TC GUDEL HU KUCK S HUBER G

Tc. Brunold et al., EXCITED-STATE ABSORPTION AND LASER POTENTIAL OF MN6-DOPED BASO4 CRYSTALS(), Journal of the Optical Society of America. B, Optical physics, 14(9), 1997, pp. 2373-2377

23

INGLESE

Article

Optics

Journal of the Optical Society of America. B, Optical physics → ACNP

0740-3224

14

9

1997

2373 - 2377

ISI

0740-3224(1997)14:9<2373:EAALPO>2.0.ZU;2-L

Room-temperature E parallel to b and E perpendicular to b polarized ex cited-state absorption (ESA) measurements on Mn6+-doped crystals of Ba SO4 in the 530-1800-nm spectral region are reported. ESA transitions f rom the metastable T-2(2) ligand-field state to the lowest-energy liga nd-to-metal charge transfer states involve two-electron excitations an d thus carry low intensity. A strong ESA band owing to the first one-e lectron 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 stimul ated-emission cross section is larger than the ESA cross section over the whole range of spontaneous emission. Our results indicate that tun able laser action between 920 nm and 1.6 mu m should, in principle, be achievable. The effective peak stimulated-emission cross section at 1 100 nm is 3 x 10(-19) cm(2). (C) 1997 Optical Society of America.