An octave spanning mid-infrared frequency comb generated in a silicon nanophotonic wire waveguide

Abstract

We demonstrate an octave-spanning frequency comb with a spectrum covering wavelengths from 1,540 nm up to 3,200 nm. The supercontinuum is generated by pumping a 1-cm long dispersion engineered silicon wire waveguide by 70 fs pulses with an energy of merely 15 pJ. We confirm the phase coherence of the output spectrum by beating the supercontinuum with narrow bandwidth CW lasers. We show that the experimental results are in agreement with numerical simulations.

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• Silicon-Chip Mid-Infrared Frequency Comb Generation
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• Low-loss silicon core fibre platform for broadband nonlinear photonics in the mid-infrared
• Low-Loss Silicon Platform for Broadband Mid-Infrared Photonics