Quasi-phase-matched supercontinuum-generation in photonic waveguides

Abstract

Supercontinuum generation in integrated photonic waveguides is a versatile source of broadband light, and the generated spectrum is largely determined by the phase-matching conditions. Here we show that quasi-phase-matching via periodic modulations of the waveguide structure provides a useful mechanism to control the evolution of ultrafast pulses and the supercontinuum spectrum. We experimentally demonstrate quasi-phase-matched supercontinuum to the TE20 and TE00 waveguide modes, which enhances the intensity of the SCG in specific spectral regions by as much as 20 dB. We utilize higher-order quasi-phase-matching (up to the 16th order) to enhance the intensity in numerous locations across the spectrum. Quasi-phase-matching adds a unique dimension to the design-space for SCG waveguides, allowing the spectrum to be engineered for specific applications.

Main text and supplementary materials

References in corpus (5)

• An octave spanning mid-infrared frequency comb generated in a silicon nanophotonic wire waveguide
• Ultrabroadband supercontinuum generation and frequency-comb stabilization using on-chip waveguides with both cubic and quadratic nonlinearities
• Self-referenced frequency combs using high-efficiency silicon-nitride waveguides
• Dispersion engineered silicon nitride waveguides by geometrical and refractive-index optimization
• Photonic-chip supercontinuum with tailored spectra for precision frequency metrology

Cited by in corpus (7)

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• Beyond 100 THz-spanning ultraviolet frequency combs in a non-centrosymmetric crystalline waveguide
• Group-velocity dispersion engineering of tantala integrated photonics
• Tunable mid-infrared generation via wide-band four wave mixing in silicon nitride waveguides
• Dynamics and selective temporal focusing of a time truncated Airy pulse in varying dispersive medium
• Supercontinuum generation in silicon Bragg grating waveguide
• Modelling spontaneous four-wave mixing in periodically-tapered waveguides