Fig. 1: Polarization-diverse self-stabilized soliton formation in the strongly coupled dispersion-managed nitride microresonator. | Communications Physics

Fig. 1: Polarization-diverse self-stabilized soliton formation in the strongly coupled dispersion-managed nitride microresonator.

From: Polarization-diverse soliton transitions and deterministic switching dynamics in strongly-coupled and self-stabilized microresonator frequency combs

Fig. 1

a Schematic of the self-thermally stabilized microcomb generation where a transverse magnetic (TM) polarized continuous wave laser drives a dispersion-managed microresonator leading to the generation of the transverse electric (TE) polarized soliton microcomb. Inset i: Scanning electron micrograph of the dispersion-managed microresonator including an expanded view of the designed mode filters. Inset ii: Conceptual illustration of the strongly coupled splitting modes for the formation of the self-thermally stabilized microcomb. b1, b2 TM-polarized cold resonant supermode, and the converted TE-polarized cold resonant supermode. c Intracavity power in the TE polarization with respect to the backward-pump wavelength detuning. Inset: Soliton existence range indicating the transition dynamics. d Generated self-thermally stabilized soliton microcomb with low repetition rate, an enhanced pump-microcomb conversion efficiency of 9.2% and a transform-limited full-width half-maximum pulse width of 77.3 fs. Inset: the measured intensity autocorrelation trace. e Measured repetition rate tone. Inset: the fitted linewidth showing the 3-dB linewidth of 169 Hz over 1 ms observation time. f Measured single-sideband phase noise of the free-running microcomb after optical-to-electrical conversion.

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