Extended blue supercontinuum generation in cascaded holey fibers

Abstract

By combining multiple photonic crystal fibers with sequentially decreasing zero-dispersion wavelengths we have produced a 1.2 W average-power white-light continuum, covering the visible-near-infrared spectrum from 0.44 to 1.89 microm (10 dB width), with an all-fiber picosecond ytterbium pump laser. Wavelengths as short as the ultraviolet (0.35 microm), and spectral power densities of more than 2 mW/nm 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.

2W/nm peak-power all-fiber supercontinuum source and its application to the characterization of periodically poled non-linear crystals

“…We believe that four-wave mixing is the dominant effect generating the short wavelength side [9][10][11][12][13][14].…”

A genetic algorithm based approach to fiber design for high coherence and large bandwidth supercontinuum generation

“…This makes it difficult to find the most optimized set of parameters for specified characteristics. A number of methods have been used in previous studies to tailor the SC spectrum, such as shifting the zero dispersion wavelength (ZDW) [25], flattening dispersion slope [26], tuning pulse chirp [27], modification of the pulse shape [28] and connecting multiple piece of fibers with different dispersion [29]. All of these methods influence the generated SC.…”

Nonlinear matching of Solitons - Continued redshift between silica and soft-glass fibers

“…Generally, soft-glass fibers have zero dispersion wavelengths (ZDW) at longer wavelengths than silica fibers, and thus systems of concatenated silica and soft-glass fibers have been proposed to enable the use of Er/Yr based lasers for anomalous dispersion regime pumping [1][2][3][4]. In such concatenated systems, solitons redshift, by the soliton self-frequency shift (SSFS), initially in a silica fiber (fiber 1) until strong dispersion prevents further redshift [4]. Then, light is coupled into a soft-glass fiber (fiber 2) for further redshifting into the IR.…”