Abstract

The direct generation of mid-infrared light is of significant interest for various applications including spectroscopy, detection system, optical sensing and biophotonics. Ultrashort-pulse nonlinear interaction can be viewed as four-wave mixing process, which can generate new spectral components under appropriate conditions. Here, we numerically demonstrate a fully, yet effective, spectral conversion scheme where the effective portion and components of femtosecond pulses can access the mid-infrared region directly by four-wave mixing process in silicon nitride integrated photonics waveguide. Wideband conversions occur mainly towards the mid-infrared region around the traditional red-shift phase-matching point without the adjustment of waveguide geometry. The corresponding conversion mechanisms can be attributed to nonlinear interaction of optical waves, resulting in the dispersive wave generation, the soliton-probe collision and the phase-sensitive scattering process. Our results provide an alternative route to realize wideband tunable mid-infrared frequency conversion in silicon nitride system on a chip.

Tunable mid-infrared generation via wide-band four-wave mixing in silicon nitride waveguides

Abijith S. Kowligy, Daniel D. Hickstein, Alex Lind, David R. Carlson, Henry Timmers, Nima Nader, Daniel L. Maser, Daron Westly, Kartik Srinivasan, Scott B. Papp, and Scott A. Diddams
Opt. Lett. 43(17) 4220-4223 (2018)

Triply resonant coherent four-wave mixing in silicon nitride microresonators

Attila Fülöp, Clemens J. Krückel, David Castelló-Lurbe, Enrique Silvestre, and Victor Torres-Company
Opt. Lett. 40(17) 4006-4009 (2015)

Four-wave mixing and octave-spanning supercontinuum generation in a small core hydrogenated amorphous silicon fiber pumped in the mid-infrared

L. Shen, N. Healy, L. Xu, H. Y. Cheng, T. D. Day, J. H. V. Price, J. V. Badding, and A. C. Peacock
Opt. Lett. 39(19) 5721-5724 (2014)

Theoretical study of graphene-silicon nitride-silicon hybrid photonic crystal waveguides for four-wave mixing enhancement

Shuyi Shen, Kexin Wu, Lu Sun, and Chun Jiang
Appl. Opt. 54(12) 3640-3644 (2015)

Spontaneous four-wave mixing in silicon nitride waveguides for broadband coherent anti-Stokes Raman scattering spectroscopy

Niklas M. Lüpken, Thomas Würthwein, Jörn P. Epping, Klaus-J. Boller, and Carsten Fallnich
Opt. Lett. 45(14) 3873-3876 (2020)