propagation of a femtosecond laser pulsepropagation of a femtosecond laser pulse

Dear Mr. Abouseif
Thank you for your reply.
We use a 200fs laser pulse to create waveguides inside silica experimentally. The laser pulse passes through a SLM (spatial light modulator) to manipulate the phase profile of laser beam. Then it focuses by a lens inside silica and make a trace inside it. Permanent variation of refractive index is then produced inside medium. By changing the phase profile of incidence beam by SLM, the trace of beam as well as its intensity and focal point is altered. There are some softwares to simulate evolution of propagating beam using FDTD method but nonlinear phenomenas like Kerr effect and plasma defocusing are not evolved there in.
Now I would like to know, is there a capability of simulating these type of intense and sort pulses in the Optiwave softwares? And can I introduce nonlinear effects on them?
Thank you again for kind consideration,
Sincerely yours,
Keivan

Thanks dear Marek
Could you please provide me some more help on it and refer a paper or text explaining how this kind of simulation have done by optiFDTD?
Femto-second laser pulses simulations has its own difficulties and specialties. Does this kind of short pulses predicted in this software?
Yours,
Keivan