Abstract
In this study, the optimization of the operating parameters of nonlinear polymers for self-phase modulation is reported. The effect of delocalization length and adding function groups (donor-acceptor groups) on the nonlinear refractive index are investigated. Based on nonlinear Schrödinger equation, the pulse chirping factor, for a set of nonlinear polymers, at different operating conditions, is studied. The comparison between laser pulse chirping factor resulting from saturated and conjugated polymers is presented. It is noticed that the chirping factor that evolved from conjugated polymers is greater than its equivalent in saturated polymers. Moreover, laser pulse chirping factor is increased with increasing of delocalization length. Therefore, this study may initiate the synthesis of new nonlinear polymers in order to produce appropriate nonlinear optical properties for high broadening materials in laser compression systems.
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