A theoretical study of the nonlinear propagation of picosecond chirped pulses in single-mode fibers is presented. We show that, under appropriate conditions, spectral narrowing—rather than broadening, as is generally believed—is induced, owing to the interplay of self-phase-modulation and dispersion. For downchirped pulses at a wavelength of 0.9 µm and a peak power as low as 0.1 W, substantial spectral narrowing occurs.
© 1993 Optical Society of America
S. A. Planas, N. L. Pires Mansur, C. H. Brito Cruz, and H. L. Fragnito, "Spectral narrowing in the propagation of chirped pulses in single-mode fibers," Opt. Lett. 18, 699-701 (1993)