The results of experimental studies of conditions for THz emission generation in laser filament created by focused ultrashort laser pulse of Ti: Sapphire complex are presented. The influence of magnitude and direction of applied external electric field, energy and polarization of pump radiation in one- and two-color optical schemes on the intensity, divergence, and polarization of THz radiation are investigated. THz spectra is estimated and optimal generation conditions are discussed.
This paper presents model study and experimental results on frequency conversion of Ti:Sapphire laser operating at 950 nm into the long-wavelength THz range in a β-BBO crystal. The generating spectrum in the range of 0.2 - 0.8 THz is studied in detail.
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