Prof. Andrius Baltuška received the diploma in physics from Vilnius University, Lithuania, in 1993 and a Ph.D. degree in chemical physics from the University of Groningen, The Netherlands, in 2000. Since 2006 he is a full professor at the faculty of Electrical Engineering and Information Technology, Vienna University of Technology. His group (http://atto.photonik.tuwien.ac.at) works on the development of intense ultrafast laser and parametric amplifiers and applications of fully controlled optical pulses in ultrafast spectroscopy and high-field physics. He received a European Young Investigator Award (EURYI) from the European Science Foundation (2004), Ignaz L. Lieben Award from the Austrian Academy of Sciences (2006) and a Starting Grant (Consolidator) of the European Research Council (2011). In 2016 he was elected a corresponding member of the Austrian Academy of Sciences (ÖAW).
Generation of deterministic femtosecond pulse bursts with inter-pulse temporal separation ranging from fs to ns is required in a broad range of applications in spectroscopy, strong-field physics, laser materials processing, free electron laser technology, etc. An opportunity to control inter-pulse delay within the excitation pulse train (i.e. control over the intra-burst frequency) directly in the time domain would enable very attractive types of vibrational and rotational Raman spectroscopies and open a path to the generation of narrowband THz pulses.
The talk will survey a number of approaches recently developed at TU Wien enabling different burst-amplification regimes. Several proof-of-concept applications will be highlighted: generation of high-energy UV and mid-IR pulses, femtosecond filamentation in air enhanced through multi-pulse-induced rotational nitrogen coherence and generation of tunable-frequency THz pulses via optical rectification of laser pulse bursts.