The influence of atomic densities on the propagation property for ultrashort pulses in a two-level atom (TLA) medium is investigated. With higher atomic densities, the self-induced transparency (SIT) cannot be recovered even for 2? ultrashort pulses. New features such as pulse splitting, red-shift and blue-shift of the corresponding spectra arise, and the component of central frequency gradually disappears.
© 2005 Chinese Optics Letters
(140.0140) Lasers and laser optics : Lasers and laser optics
(190.4720) Nonlinear optics : Optical nonlinearities of condensed matter
(270.5530) Quantum optics : Pulse propagation and temporal solitons
(320.2250) Ultrafast optics : Femtosecond phenomena
Bingxin Liu, Shangqing Gong, Xiaohong Song, and Shiqi Jin, "Influence of atomic densities on propagation property for ultrashort pulses in a two-level medium," Chin. Opt. Lett. 3, 278-280 (2005)