Electrically pumped photonic integrated soliton microcomb

Arslan S. Raja, Andrey S. Voloshin, Hairun Guo, Sofya E. Agafonova, Junqiu Liu, Alexander S. Gorodnitskiy, Maxim Karpov, Nikolay G. Pavlov, Erwan Lucas, Ramzil R. Galiev, Artem E. Shitikov, John D. Jost, Michael L. Gorodetsky () and Tobias J. Kippenberg ()
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Arslan S. Raja: Swiss Federal Institute of Technology Lausanne (EPFL)
Andrey S. Voloshin: Russian Quantum Center
Hairun Guo: Swiss Federal Institute of Technology Lausanne (EPFL)
Sofya E. Agafonova: Russian Quantum Center
Junqiu Liu: Swiss Federal Institute of Technology Lausanne (EPFL)
Alexander S. Gorodnitskiy: Russian Quantum Center
Maxim Karpov: Swiss Federal Institute of Technology Lausanne (EPFL)
Nikolay G. Pavlov: Russian Quantum Center
Erwan Lucas: Swiss Federal Institute of Technology Lausanne (EPFL)
Ramzil R. Galiev: Russian Quantum Center
Artem E. Shitikov: Russian Quantum Center
John D. Jost: Swiss Federal Institute of Technology Lausanne (EPFL)
Michael L. Gorodetsky: Russian Quantum Center
Tobias J. Kippenberg: Swiss Federal Institute of Technology Lausanne (EPFL)

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: Abstract Microcombs provide a path to broad-bandwidth integrated frequency combs with low power consumption, which are compatible with wafer-scale fabrication. Yet, electrically-driven, photonic chip-based microcombs are inhibited by the required high threshold power and the frequency agility of the laser for soliton initiation. Here we demonstrate an electrically-driven soliton microcomb by coupling a III–V-material-based (indium phosphide) multiple-longitudinal-mode laser diode chip to a high-Q silicon nitride microresonator fabricated using the photonic Damascene process. The laser diode is self-injection locked to the microresonator, which is accompanied by the narrowing of the laser linewidth, and the simultaneous formation of dissipative Kerr solitons. By tuning the laser diode current, we observe transitions from modulation instability, breather solitons, to single-soliton states. The system operating at an electronically-detectable sub-100-GHz mode spacing requires less than 1 Watt of electrical power, can fit in a volume of ca. 1 cm3, and does not require on-chip filters and heaters, thus simplifying the integrated microcomb.

Date: 2019
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DOI: 10.1038/s41467-019-08498-2

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