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We demonstrate a novel photonic-crystal fiber architecture that breaks with the paradigm of lattice homogeneity and enables a new degree of freedom in photonic-crystal-fiber design. We experimentally demonstrate guiding of ap20-fs pulses over meter distance.
We demonstrate enhanced nonlinear self-phase modulation through short silicon photonic crystal waveguides due to slow light using picosecond pulses. The measurements are supported by simulations, highlighting the simultaneous reinforcement of nonlinear absorption and free carriers.
We fabricated lattice-shifted photonic crystal waveguides stably showing low dispersion slow light in a wide wavelength bandwidth. The two photon absorption and self-phase modulation were clearly enhanced for sub-ps optical pulses.
In this paper, we report that a fibre grating written into a PCF can be used to create a narrow enhancement feature in a supercontinuum spectrum. The self-phase modulation (SPM) acts on an ultrafast pulse spectrally shaped by a narrow-band phase or amplitude filter, creating spectral enhancement by a process of interference between the sharp spectral feature and the broad-band ultrafast pulse. Thus...
Nonlinear switching of an optical pulse through a defect state in a one dimensional photonic microstructured AlGaAs waveguide is observed. This effect is attributed to self-phase modulation of the input spectrum in the initial part of the waveguide.
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