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When you start a Ph.D. program, you may be thrilled to be studying a fancy topic that you love—and you should be! But don’t let that prevent you from carefully considering the impact that your Ph.D. supervisor has on your educational experience and career. To set yourself up for success, it’s worth taking the time to select someone who aligns well with your professional goals, work style and personality. 

We demonstrate spectral phase transitions in dual-pumped Si₃N₄nanophotonic Kerr optical parametric oscillators with anomalous dispersion. Through pump-power modulation, we observe real-time switching between a near-degenerate signal (0-FSR separation) and non-degenerate signals (4-FSR separation). 

We demonstrate Kerr-mediated all-optical synchronization of a dissipative Kerr solition with an external reference laser in a single microring resonator. It enables passive stability transfer and frequency division for optical clock metrology applications. 

We present a two-dimensional frequency comb, with distinct fixed repetition-rates in both the azimuthal mode dimension and an orthogonal dimension parametrized by the angular phase-velocity. We experimental demonstrate it using a single integrated microring bichromatically pumped. 

Abstract The scaling of many photonic quantum information processing systems is ultimately limited by the flux of quantum light throughout an integrated photonic circuit. Source brightness and waveguide loss set basic limits on the on-chip photon flux. While substantial progress has been made, separately, towards ultra-low loss chip-scale photonic circuits and high brightness single-photon sources, integration of these technologies has remained elusive. Here, we report the integration of a quantum emitter single-photon source with a wafer-scale, ultra-low loss silicon nitride photonic circuit. We demonstrate triggered and pure single-photon emission into a Si₃N₄photonic circuit with ≈ 1 dB/m propagation loss at a wavelength of ≈ 930 nm. We also observe resonance fluorescence in the strong drive regime, showing promise towards coherent control of quantum emitters. These results are a step forward towards scaled chip-integrated photonic quantum information systems in which storing, time-demultiplexing or buffering of deterministically generated single-photons is critical.