Integrated turnkey soliton microcombs

Optical frequency combs have a wide range of applications in science and technology1. An important development for miniature and integrated comb systems is the formation of dissipative Kerr solitons in coherently pumped high-quality-factor optical microresonators2–9. Such soliton microcombs10 have been applied to spectroscopy11–13, the search for exoplanets14,15, optical frequency synthesis16, time keeping17 and other areas10. In addition, the...