1 October 1991 Generation of ultrashort far-infrared laser pulses optically pumped with truncated hybrid-10 μm-CO2 laser pulses
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Proceedings Volume 1576, 16th International Conference on Infrared and Millimeter Waves; 15761E (1991) https://doi.org/10.1117/12.2297763
Event: 16th International Conference on Infrared and Millimeter Waves, 1991, Lausanne, Switzerland
Abstract
The generation of ultrashort far- infrared laser pulses is of interest for applications in solid state physics, plasma physics and also for the understanding of fundamental processes occuring on a short-time scale in far-infrared gas lasers. However, far-infrared lasers are generally low-pressure narrow-band systems which implies that in this wavelength range short pulses cannot be produced by conventional means. We therefore investigate the generation of ultrashort far-infrared pulses with laser gases which emit by coherent processes such as superradiance or Raman emission.1 In the process of superradiant emission2 the atoms are coupled together by their common radiation field, and thus decay cooperatively. For a number N of emitting atoms or molecules the pulse intensity is therefore proportional to N2 and the pulse duration to 1/N. Since N can be large, this process offers the possibility of producing intense short pulses. In the case of Raman emission3 the pulse can be shorter than the inverse linewidth of the transition if the pump pulse is broad band. Hence, the pulse duration is determined by the larger of either the pump-pulse bandwidth or the laser linewidth.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. P. Scherrer, D. P. Scherrer, } "Generation of ultrashort far-infrared laser pulses optically pumped with truncated hybrid-10 μm-CO2 laser pulses", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15761E (1 October 1991); doi: 10.1117/12.2297763; https://doi.org/10.1117/12.2297763
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