SPECIAL AMO PHYSICS SEMINAR
"Filament-ignited free-space nitrogen laser:
problem overview and first results”"
Photonics Institute Vienna University of Technology
Since 2009, we have been working on the development of an atmospheric stand-off
backward sensing as part of a multilateral project funded by the European
Commission. The core objective of this research is to enable a phase-matched
Raman signal generation from non-scattering and non-reflective gaseous samples
in the backward direction with respect to the excitation laser beam. The
prerequisite to realizing such a scheme is remotely induced free-space laser
emission from atmospheric gases, which we pursue via laser filamentation with
near-IR and mid-IR femtosecond pulses. This presentation will give an overview
of the project and recent experimental results on free-space lasing from nitrogen. The following subjects will be discussed: the general idea and possible control parameters for lasing in atmospheric species; comparison of different femtosecond laser sources for the filament-assistant lasing; adaptive UV-fluorescence control and the first demonstration of an efficient laser generation from the filament in the nitrogen-argon gas mixture.
Monday, October 3, 2011
IQSE 578, 4:00 p.m.
Mitchell Physics Building
Institute for Quantum Science and Engineering
THE INSTITUTE FOR QUANTUM
SCIENCE AND ENGINEERING