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- Title
Multiple filamentation of intense femtosecond laser pulses in air.
- Authors
Ionin, A. A.; Kudryashov, S. I.; Makarov, S. V.; Seleznev, L. V.; Sinitsyn, D. V.
- Abstract
The propagation of focused femtosecond laser pulses with supercritical peak powers in air has been investigated by the methods of optical visualization, profilometry, and calorimetry. Laser pulses with supercritical powers create a bundle of submillimeter filaments with a diameter of about 5 µm ahead of the lens focus; the maximum number of filaments in the beam cross section and their length increase linearly and sublinearly, respectively, with the radiation peak power. The optical visualization and calorimetry indicate that the plasma channels of filaments are optical contrast (a plasma density of 1018–1019 cm−3), ensuring the refraction of laser radiation incident on them.
- Subjects
FEMTOSECOND lasers; CALORIMETRY; LASER beams; METAL fibers; VISUALIZATION
- Publication
JETP Letters, 2009, Vol 90, Issue 6, p423
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364009180040