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.
© 1996 Optical Society of America
Original Manuscript: September 19, 1995
Revised Manuscript: December 12, 1995
Published: May 20, 1996
I. Ilev, H. Kumagai, K. Toyoda, and I. Koprinkov, "Highly efficient wideband continuum generation in a single-mode optical fiber by powerful broadband laser pumping," Appl. Opt. 35, 2548-2553 (1996)