Supercontinuum generation of ultrashort laser pulses in air at different central wavelengths
arXiv:physics/0703155 · doi:10.1016/j.optcom.2007.06.067
Abstract
Supercontinuum generation by femtosecond filaments in air is investigated for different laser wavelengths ranging from ultraviolet to infrared. Particular attention is paid on the role of third-harmonic generation and temporal steepening effects, which enlarge the blue part of the spectrum. A unidirectional pulse propagation model and nonlinear evolution equations are numerically integrated and their results are compared. Apart from the choice of the central wavelength, we emphasize the importance of the saturation intensity reached by self-guided pulses, together with their temporal duration and propagation length as key players acting on both supercontinuum generation of the pump wave and emergence of the third harmonics. Maximal broadening is observed for large wavelengths and long filamentation ranges.
arXiv comment10 pages, 11 figures
References in corpus (1)
Cited by in corpus (4)
- Photoionization-induced emission of tunable few-cycle mid-IR dispersive waves in gas-filled hollow-core photonic crystal fiber
- Spectral dependence of purely-Kerr driven filamentation in air and argon
- Memory effects in the long-wave infrared avalanche ionization of gases: A review of recent progress
- Generation of bottle beam using low-density channel in air