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- Title
Effect of beam diameter on the propagation of intense femtosecond laser pulses.
- Authors
Luo, Q.; Hosseini, S. A.; Liu, W.; Gravel, J.-F.; Kosareva, O. G.; Panov, N. A.; Aközbek, N.; Kandidov, V. P.; Roy, G.; Chin, S. L.
- Abstract
This paper describes the effects observed during the propagation of intense femtosecond laser pulses in air following the modification of the laser beam diameter with a pair of convex-concave lenses placed/mounted in a telescopic configuration. We observed that by reducing the diameter of the beam the detected back-scattered nitrogen fluorescence from the filaments becomes more stable on a shot-to-shot basis while, for a larger beam size, greater fluctuations are observed that are not correlated to shot-to-shot fluctuations in the laser pulse energy. This result leads to a new method to control the fluorescence signal which can be very important in remote-sensing applications.
- Subjects
FEMTOCHEMISTRY; LASER photochemistry; LASER beams; INDUSTRIAL lasers; FLUORESCENCE; RADIOACTIVITY
- Publication
Applied Physics B: Lasers & Optics, 2005, Vol 80, Issue 1, p35
- ISSN
0946-2171
- Publication type
Article
- DOI
10.1007/s00340-004-1692-2