We investigate experimentally and theoretically the broadening of the optical spectrum of a multimode cw field propagating in the normal dispersion regime of a single-mode fiber. The width of the optical spectrum is not a monotonic function of propagation length. This behavior arising from the interplay between the Kerr effect and group-velocity dispersion contrasts with spectral broadening of mode-locked pulses.
© 2006 Optical Society of America
Original Manuscript: January 13, 2006
Revised Manuscript: February 22, 2006
Manuscript Accepted: February 24, 2006
B. Barviau, S. Randoux, and P. Suret, "Spectral broadening of a multimode continuous-wave optical field propagating in the normal dispersion regime of a fiber," Opt. Lett. 31, 1696-1698 (2006)