Previous abstract | Graphical version | Text version | Next abstract

Session K20 - Poster Session.
POSTER session, Sunday afternoon, April 29
Congressional C, Renaissance Hotel

[K20.062] Optical Spectroscopy and Stimulated Emission of Dysprosium-doped Tungstates

J.T. Seo, U.H. Hommerich (a), A.A. Kaminskii (b), A.A. Pavlyuk (c), (a) Research Center for Optical Physics Collaboration, (b) Institute of Crystallography Collaboration, (c) Institute of Inorganic Chemistry Collaboration

Rare-earth ion-doped tungstate materials have been intensively investigated for laser development for lidar applications. The tungstate materials in many different compositions have a large x(3) Raman scattering effect and can be used in various laser experiments and developments. We are currently interested in the development of a visible laser, which can be doubled to the 270-320 nm for the remote sensing of ozone in the atmosphere. Recently, a new visible stimulated-emission at 574 nm in Dy-doped KGd(WO_4)_2 has been reported. The stimulated emission line is assigned to the ^4F_9/2 to ^6H_13/2 transition of Dy^3+ activators. The peak emission cross-section of this channel is ~5.4x10^-20 cm^2 with our spectroscopic parameters. The lifetime at ^4F_9/2 and the branching ratio of the ^4F_9/2 to ^6H_13/2 stimulated emission channel are ~160 \mus and ~0.69, respectively. Details of inter-manifold and inter-Stark transitions and emission properties of Dy-doped KGW will be discussed.

Part K of program listing