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Picosecond pulse pumped supercontinuum generation in silicon waveguide with a weak continuous wave trigger

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Abstract

We numerically demonstrate that picosecond pulse pumped supercontinuum (SC) generation in a silicon waveguide can be enhanced with the assistance of a weak continuous-wave (CW) trigger. The bandwidth of the resulting SC is greatly improved. The effects of two-photon absorption, free-carrier absorption, and free-carrier dispersion on SC generation in the silicon waveguide are studied. The optimized trigger position is close to the modulation instability peak. The results help us understand the details of SC generation in silicon waveguides in the presence of a CW trigger and noise. By tuning the wavelength of the CW trigger, we reach a good temporal coherence and intensity stability in the picosecond pulse pumped SC generation in a silicon waveguide.

© 2020 Optical Society of America

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