title: Highly efficient wideband continuum generation in a single-mode optical fiber by powerful broadband laser pumping.
abstract: By pumping a single-mode optical fiber with a powerful broadband nonselective dye laser, we obtain a high-efficiency wideband continuum (530-930 nm) with nonlinear conversion efficiency exceeding 90%. Experimental conditions for a coherent regime of broadband stimulated Raman scattering are created, which in combination with the broadband self-phase modulation and the four-photon parametric processes leads to a spectral broadening and to the continuum formation. The influence of the pump laser spectral linewidth on the nonlinear conversion efficiency is analyzed and investigated by comparative experiments at narrow-band and broadband laser excitations.
authors.forename: I
authors.initials: I
authors.lastname: Ilev
authors.forename: H
authors.initials: H
authors.lastname: Kumagai
authors.forename: K
authors.initials: K
authors.lastname: Toyoda
authors.forename: I
authors.initials: I
authors.lastname: Koprinkov