Saturation of the all-optical Kerr effect
- Brée, Carsten
- Demircan, Ayhan
- Steinmeyer, Günter
2010 Mathematics Subject Classification
2008 Physics and Astronomy Classification Scheme
- 42.65.Tg 42.65.-k 52.38.Hb 42.68.Ay
- Nonlinear Optics, all-optical Kerr effect, Femtosecond Filamentation
Saturation of the intensity dependence of the refractive index is directly computed from ionization rates via a Kramers-Kronig transform. The linear intensity dependence and its dispersion are found in excellent agreement with complete quantum mechanical orbital computations. Higher-order terms concur with solutions of the time-dependent Schrödinger equation. Expanding the formalism to all orders up to the ionization potential of the atom, we derive a model for saturation of the Kerr effect. This model widely confirms recently published and controversially discussed experimental data and corroborates the importance of higher-order Kerr terms for filamentation.
- Phys. Rev. Lett., 106 (2011) pp. 183902/1-183902/4.