@article {Cole:18,
	title = {Kerr-microresonator solitons from a chirped background},
	journal = {Optica},
	volume = {5},
	number = {10},
	year = {2018},
	month = {Oct},
	pages = {1304{\textendash}1310},
	publisher = {Optica Publishing Group},
	abstract = {Optical frequency combs based on solitons in nonlinear microresonators open up new regimes for optical metrology and signal processing across a range of expanding and emerging applications. In this work, we advance these combs toward applications by demonstrating protected single-soliton formation and operation in a Kerr-nonlinear microresonator using a phase-modulated pump laser. Phase modulation gives rise to spatially/temporally varying effective loss and detuning parameters, leading to an operation regime in which multi-soliton degeneracy is lifted and a single soliton is the only observable behavior. We achieve direct, on-demand excitation of single solitons as indicated by reversal of the characteristic \&\#x201C;soliton step.\&\#x201D; Phase modulation also enables precise, high bandwidth control of the soliton pulse train\&\#x2019;s properties, and we measure dynamics that agree closely with simulations. We show that the technique can be extended to high-repetition-frequency Kerr solitons through subharmonic phase modulation. These results will facilitate straightforward generation and control of Kerr-soliton microcombs for integrated photonics systems.},
	keywords = {frequency combs, Integrated photonics, Microcavity devices, Optical signals, Phase modulation, Pulse propagation and temporal solitons, Signal Processing, Temporal solitons},
	doi = {10.1364/OPTICA.5.001304},
	url = {http://opg.optica.org/optica/abstract.cfm?URI=optica-5-10-1304},
	author = {Daniel C. Cole and Jordan R. Stone and Miro Erkintalo and Yang, Ki Youl and Yi, Xu and Kerry J. Vahala and Scott B. Papp}
}
