Abstract

By combining multiple photonic crystal fibers with sequentially decreasing zero-dispersion wavelengths we have produced a 1.2W average-power white-light continuum, covering the visible–near-infrared spectrum from 0.44to1.89μm (10dB width), with an all-fiber picosecond ytterbium pump laser. Wavelengths as short as the ultraviolet (0.35μm), and spectral power densities of more than 2mWnm in the blue spectral region, have been generated. The process is understood in terms of optimizing four-wave mixing phase matching to enhance short-wavelength generation.

© 2005 Optical Society of America

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