Affiliation: | (1) Abteilung Laserphysik, Max-Planck-Institut für biophysikalische Chemie, Postfach 2841, D-3400 Göttingen, Germany;(2) Present address: Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, P.O. Box 8211, Shanghai, People's Republic of China;(3) Present address: JATE University, Research Group on Laser Physics of the Hungarian Academy of Sciences, Dóm tér 9, H-6720 Szeged, Hungary |