Abstract

We investigate the ultrafast spectral characteristics of our ultra-silicon rich nitride (USRN) waveguides with a 1-mm-length scale, which is designed to have large Kerr nonlinearity (γ~550W⁻¹/m) and negligible nonlinear loss for wideband spectral broadening near-infrared wavelength range. The waveguide achieved the spectral bandwidth of 225 nm, which is a 4 fold spectral broadening. In addition, the reciprocal transmission (P_in/P_out) is measured to be almost flat up to 100W of input peak power indicating that nonlinear loss is proven to be negligible at these power levels. The ultra-short USRN waveguide broadens the spectrum by a factor of around 3 per 1-mm-length, therefore it is relatively larger than other CMOS-compatible platforms.

© 2016 Optical Society of America