Abstract
An 80 MHz pulse train of ~100 fs optical pulses centred at ~1.5 µm is propagated through a variety of high-index-contrast silicon-on-insulator waveguide structures less than 1 mm long. All-optical power limiting and negative differential transmission, based only on the intrinsic nonlinear response of the untextured waveguides near 1.5 µm, are demonstrated for average in-guide power levels of ~1 mW. Superlinear transmission is observed in a textured silicon waveguide for power levels less than 20 µW.
©2004 Optical Society of America
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