6 September 2017 Self-similar chirped laser pulse propagation in a medium with TOD and non-resonant TPA
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We study a self-similar mode of femtosecond pulse propagation in a medium with non-resonant TPA of laser energy and with taking into account the TOD influence. Non-resonant TPA appears due to detuning between a carrier frequency of wave packet and doubled frequency corresponding to certain energy level transition of substance atoms. This pulse propagation mode appears for a pulse with nonlinear chirp of definite form. Moreover, the pulse shape is asymmetric, as a rule. Laser pulse propagation in nonlinear medium is described by nonlinear Schrödinger equation. Using the analytical approach we derive a soliton-like pulse shape and its chirp evolution in time. Analytical results are confirmed by computer simulation, based on nonlinear Schrödinger equation. We demonstrate that the analytical results are valid at a long propagation distance.
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Vyacheslav A. Trofimov, Aleksey A. Kalinovich, Irina G. Zakharova, "Self-similar chirped laser pulse propagation in a medium with TOD and non-resonant TPA", Proc. SPIE 10345, Active Photonic Platforms IX, 103452D (6 September 2017); doi: 10.1117/12.2270633; https://doi.org/10.1117/12.2270633

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