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arXiv · 1405.7434

Wavelength conversion and parametric amplification of optical pulses via quasi-phase-matched FWM in long-period Bragg silicon waveguides

Spyros Lavdas·Shuang Zhao·Jeffrey B. Driscoll·Richard R. Grote·Richard M. Osgood·Nicolae C. Panoiu
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Abstract

We present a theoretical analysis supported by comprehensive numerical simulations of quasi phase-matched four-wave mixing (FWM) of ultrashort optical pulses that propagate in weakly width-modulated silicon photonic nanowire gratings. Our study reveals that, by properly designing the optical waveguide such that the interacting pulses co-propagate with the same group-velocity, a conversion efficiency enhancement of more than 15 dB, as compared to a uniform waveguide, can readily be achieved. We also analyze the dependence of the conversion efficiency and FWM gain on the pulse width, time delay, walk-off parameter, and grating modulation depth.

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Spyros Lavdas, Shuang Zhao, Jeffrey B. Driscoll, Richard R. Grote, Richard M. Osgood, Nicolae C. Panoiu. 2014-05-29. Wavelength conversion and parametric amplification of optical pulses via quasi-phase-matched FWM in long-period Bragg silicon waveguides. https://doi.org/10.1364/ol.39.004017

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