Grundlagenuntersuchungen von Festkoerperlasern im Spektralbereich 1 bis 3 Mikrometer Schlussbericht

Solid-state lasers have been fundamentally investigated in the spectral region 1 to 3 microns in a cooperation between the Institute of Laser Physics/Hamburg and the Eastern partners International Laser Centre/Minsk, General Physics Institute/Moscow and the company FIRN/Krasnodar. The cooperation had a duration of 2 years (1995-1996). The main aim was the characterization and evaluation of new laser materials. Several new lasers (Nd"3"+, Tm"3"+, Er"3"+, Yb"3"+) were realized with Russian laser crystals and published in 20 international papers. Krasnodar mainly worked on the growth of Er:YSGG for 3 #mu#m-lasers. Nd:GdVO_4-crystals (Moscow) don't have yet the quality of commercially available YVO_4 from Japan or USA; however the parameters of these crystals are principally superior (absorption coefficient and cross section). In the cooperation with Minsk a lot of crystals were investigated: Silicates, tungstates, berrylates, and aluminates. From the application point of view, the most interesting results are new Yb"3"+-lasers with very high efficiency (80%.) on the basis of tungstates and a new Er"3"+-laser on the basis of Er, Yb-tungstate. The laser application of the investigated crystals is in the spectral region 1 to 3 #mu#m, which is especially interesting for applications in measurements techniques and medicine. (orig.)SIGLEAvailable from TIB Hannover: F97B1619+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman