Fig. 7: PSCs in Kerr microresonators.
From: Advances in resonator-based Kerr frequency combs with high conversion efficiencies
a Principle of the PSC consisting of X pulses formed in the CW-driven Kerr microresonator70. b Measured integrated dispersion of a SiN microresonator (blue circles) and the fitting curves for the fundamental transverse electric (TE; red dashed curve) and transverse magnetic (TM; blue dased curves) mode families. The cross points between such two mode families would occur avoided mode crossings (AMXs)70. c The soliton center line power extracted from experimental spectral envelopes versus the square of soliton number N2 in PSC85. d Optical spectra of PSC state containing 15 solitons (blue lines) and single-soliton state (red lines) in a SiN microresonator device under the same conditions of the pump power and effective detuning. The inset shows five repeated scan transmission traces, the PSC states with a soliton number of 15 are highlighted by the green background70. Images are adapted with permission from refs. 70,85. Copyright 2019, 2021 Springer Nature Limited.
