Abstract

We report a 1μm cw-pumped supercontinuum that extends short of the pump wavelength to 0.65μm. This is achieved by using a 50W Yb fiber laser in combination with a photonic crystal fiber with a carefully engineered zero-dispersion wavelength. We show that the short-wavelength generation is due to a combination of four-wave mixing and dispersive wave trapping by solitons. The evolution and limiting factors of the continuum are discussed.

© 2008 Optical Society of America

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