Intensity clamping during laser filamentation by TW level femtosecond laser in air and argon
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- Xu, S., Bernhardt, J., Sharifi, M. et al. Laser Phys. (2012) 22: 195. doi:10.1134/S1054660X12010264
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A systematic research on intensity clamping phenomenon was conducted both in air and argon by using a TW level femtosecond laser. Though the laser peak power was increased from 0.1 up to 1.5 TW in the experiment, highly stabilized peak intensity inside the filament was observed in both gases. The peak intensities inside filaments were experimentally determined to be about 6.4 × 1013 W/cm2 (f = 20 cm) in air and 1.2, 1.3, and 1.7 × 1014 W/cm2 when different focal lenses (f = 100, 60, and 20 cm) were used in argon, respectively.