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- Title
Nonlinear Enhancement of Resonance Absorption at the Filamentation of a Mid-Infrared Pulse in High-Pressure Gases.
- Authors
Kompanets, V. O.; Shipilo, D. E.; Nikolaeva, I. A.; Panov, N. A.; Kosareva, O. G.; Chekalin, S. V.
- Abstract
It has been found experimentally that the filamentation of a femtosecond pulse with a central wavelength of 1.3 µm in a mixture of nitrogen at a pressure of 30 bar and water vapor at a pressure of 2 mbar results in the redshift of the spectrum of the pulse and in the corresponding enhancement of resonance absorption at water lines near a wavelength of 1.35 µm. A replica of the resonance absorption band has been detected in the continuous spectrum of a pulse transmitted through the cell. The characteristic absorption lines of water detected experimentally correspond to the results of the numerical simulation of a three-dimensional nonstationary problem taking into account the resonance and nonresonance absorption in molecular gases.
- Subjects
FEMTOSECOND pulses; ABSORPTION; VAPOR pressure; WATER pressure; WATER vapor
- Publication
JETP Letters, 2020, Vol 111, Issue 1, p31
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364020010129