ANALYTICAL STUDY OF NONLINEAR CHIRPED PULSES - PROPAGATION IN DISPERSIVE OPTICAL FIBERS

The generation and transmission characteristics of optical pulses with nonlinear chirp are analytically studied. When we compare our results , assuming a Gaussian pulse with a quadratic chirp at the input of a d ispersive fiber, with results obtained with the Gaussian model with li near chirp, the position of maximum narrowing is modified and the velo city of broadening of the pulse envelope during the propagation is red uced. Our analytical results are in good agreement with numerical simu lation of semiconductor laser pulses. The model could be useful, for e xample, for dispersion compensation analysis.