propagation of a femtosecond laser pulsepropagation of a femtosecond laser pulse

[Keivan Aghdami]

Dear Sir/Madam
I would like to simulate propagation of a femtosecond laser pulse in silica medium considering nonlinear phenomena like Kerr effect and plasma defocusing. Has your software (FDTD or BPM) capability to do this? Is this form of short intense pulses predicted in these softwares?
Please kindly help and advise me for this subject.
Keivan

[Mohamed A. A. Abouseif]

Hi Keivan,
you can do that in OptiSystem 15.
let me know you project structure and we can help you.

best of luck
Mohamed Abouseif

[Keivan Aghdami]

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

[Damian Marek]

Keivan,

As this question is FDTD-based, I can help you with it. OptiFDTD can be used to simulate nonlinear materials with 2-order, 3-order responses as well as the Raman effect.

These nonlinear effects are limited to 2D simulations.

Damian

[Keivan Aghdami]

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

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