Comparative analysis of post-focal filamentation of focused UV and IR laser pulses in air

Journal Article · Thu Apr 30 00:00:00 EDT 2015 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2015V045N04ABEH015640· OSTI ID:22551270

Geints, Yu E; Zemlyanov, A A ^[1]; Ionin, A A; Mokrousova, D V; Seleznev, L V; Sinitsyn, D V; Sunchugasheva, E S ^[2]

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1. V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, Tomsk (Russian Federation)
2. P N Lebedev Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

We report the results of laboratory experiments and numerical calculations of the spatial position and structure of a plasma channel produced in air by high-power focused femtosecond laser radiation with wavelengths of 740 and 248 nm as a result of its self-focusing and filamentation. A comparative analysis of the physical patterns of filamentation of IR and UV laser beams with variations in the beam focal length, transverse size and power is performed. It is found that a plasma channel beyond the linear focal waist of the laser beam is formed differently for two different spectral ranges. (nonlinear optical phenomena)

• OSTI ID: 22551270
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 45, Issue 4; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AIR
COMPUTERIZED SIMULATION
EXPERIMENT RESULTS
FOCUSING
INFRARED RADIATION
LASER RADIATION
PHOTON BEAMS
PLASMA
PULSES
ULTRAVIOLET RADIATION
WAVELENGTHS