Mid-infrared difference-frequency generation in AlGaAs-on-insulator waveguides

• DOI: 10.1364/josab.488065
• Publication Date: 2023-05-23T14:00:19Z
• Authors: Magnus L. Madsen; Emil Z. Ulsig; Sebastian Folsach; Pedro H. Godoy; Eric J. Stanton; Nicolas Volet
• Keywords: Waveguide; SIGNAL (programming language)

A design study is presented for difference-frequency generation (DFG) to the mid-infrared (MIR) at 2.3 µm in AlGaAs waveguides heterogeneously integrated on silicon. Perfect phase matching (PhM) achieved simulations by engineering dimensions of waveguide and tuning wavelengths input sources. An optimal found with a width 1196 nm height 146 length about 5 mm. We expect signal output power 1 mW 2389 wavelength range from 2231 2574 use tunable sources around 940 1550 nm. The tolerance required perfect PhM also estimated showing feasibility fabrication. This offers promising compact MIR source chip be used gas sensing, particular carbon monoxide ammonia, DFG single photons C-band.