We investigate the effective nonlinearity and dispersion of cylindrical waveguides with high core-cladding index contrast. We find that the nonlinearity for a sub-wavelength sized waveguide is maximal. Utilizing such waveguides, we experimentally demonstrate octave-spanning supercontinuum with 6× lower pulse energies than typically required.
© 2004 Optical Society of America
(060.2270) Fiber optics and optical communications : Fiber characterization
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(320.7140) Ultrafast optics : Ultrafast processes in fibers
M. A. Foster and A. L. Gaeta, "Ultra-low threshold supercontinuum generation in sub-wavelength waveguides," in Frontiers in Optics 2004/Laser Science XXII/Diffractive Optics and Micro-Optics/Optical Fabrication and Testing, OSA Technical Digest Series (Optical Society of America, 2004), paper FThC5.
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