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Evaluation of intensity shape and phase change of light pulses with frequency chirp due to self-phase modulation

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9 Author(s)
H. Yoshiyama ; Dept. of Electron., Tottori Univ., Japan ; Y. Shio ; A. Imaizumi ; H. Motoyama
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A method for evaluating ultrashort light pulses is proposed. The temporal shape and the time-dependent phase change of the pulses is determined using self-consistent iterative calculations based on experimental data of the second-harmonic intensity autocorrelation and the spectra of the pulses. The self-phase modulation originating from the optical Kerr effect (OKE) and/or the saturable effect in the absorber dye solution is taken into account, and two parameters, the amount and the recovery time of the OKE, are introduced into the calculation of the temporal shape and the phase change of the pulses. These two parameters are chosen to give the best agreement of experimental and calculated second-harmonic intensity autocorrelation and spectra. The calculated results determined the lower limits of the recovery time of the OKE

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IEEE Journal of Quantum Electronics  (Volume:25 ,  Issue: 10 )