Fig. 1. Application of electric field along the z-axis, and the propagation of FW along the x–y plane of the KTP crystal.

Fig. 2. Change of ΔkL with respect to the applied voltage.

Fig. 3. Nonlinear phase of the FW along the propagation length for (a) 0.2  and (b) 0.035  GW/cm2.

Fig. 4. Change of ΔϕNL and n2eff w.r.t. the applied voltage.

Fig. 5. Change of ΔϕNL and n2eff w.r.t. the ΔkL.

Fig. 6. Change of the focal length of the cascaded Kerr lens w.r.t. the applied voltage.