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

Citation
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
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Optics
ISSN journal
0740-3224
Volume
14
Issue
9
Year of publication
1997
Pages
2373 - 2377
Database
ISI
SICI code
0740-3224(1997)14:9<2373:EAALPO>2.0.ZU;2-L
Abstract
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.