Optical power limiting of ultrashort hyper-Gaussian pulses in cascade three-level system
Liu Ji-Cai †, Guo Fen-Fen, Zhao Ya-Nan, Li Xing-Zhe
       

(color online) Evolutions of the two-photon areas of the hyper-Gaussian pulses withτ = 5.0 fs. (a) θ0 = 0.5π, peak field intensities for n = 1 (rectangle), 2 (circle), and 3 (triangle) are respectively I0 = 0.808 × 1012 W/cm2, 0.866 × 1012 W/cm2, and 0.872 × 1012 W/cm2. (b) θ0 = π, peak field intensities for n = 1 (rectangle), 2 (circle), and 3 (triangle) are respectively I0 = 1.616 × 1012 W/cm2, 1.731 × 1012 W/cm2, and 1.744 × 1012 W/cm2. Results given by two-photon area theorem (Eq. (5)) are shown with star-dotted lines.