Abstract

We experimentally investigate four-wave mixing and nonlinear losses in low-loss 3 μm thick silicon strip waveguides. Adiabatic bends allow for single-mode operation in an ultra-compact 35 cm long spiral. The waveguides exhibited reduced nonlinear losses due to the large mode area of $2.75{\mathrm{\mu m}}^2$. The nonlinear coefficient $\gamma$ was measured as $5.5{\mathrm{m}}^{-1}{\mathrm{W}}^{-1}$. These features, along with the low propagation loss of 0.17 dB/cm, enable large idler power generation at 1550 nm.

© 2016 Optical Society of America

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