Frequency combs articles within Nature

Featured

  • Article |

    We demonstrate an all-optical, mode-locking, Kerr-comb frequency division method that provides a chip-scale microwave source that is extremely versatile, accurate, stable and has ultralow noise, using only a single continuous-wave laser.

    • Yun Zhao
    • , Jae K. Jang
    •  & Alexander L. Gaeta

  • Article
    | Open Access

    A miniaturized optical frequency division system that could transfer the generation of microwaves, with superior spectral purity, to a complementary metal-oxide-semiconductor-compatible integrated photonic platform is demonstrated showing potential for large-volume, low-cost manufacturing for many applications.

    • Shuman Sun
    • , Beichen Wang
    •  & Xu Yi

  • Article
    | Open Access

    We demonstrate a photon-counting approach that extends the unique advantages of spectroscopy with interfering frequency combs into regions where nonlinear frequency conversion tends to be very inefficient, providing a step towards precision broadband spectroscopy at short wavelengths and extreme-ultraviolet dual-comb spectroscopy.

    • Bingxin Xu
    • , Zaijun Chen
    •  & Nathalie Picqué

  • Article |

    An integrated device that combines optical parametric oscillation and electro-optic modulation in lithium niobate creates a flat-top frequency-comb-like output with low power requirements.

    • Hubert S. Stokowski
    • , Devin J. Dean
    •  & Amir H. Safavi-Naeini

  • Article |

    Free-running stable optical dissipative solitons, called Nozaki–Bekki solitons, are created in a ring semiconductor laser; their spontaneous formation with tuning of laser bias eliminates the need for an external optical pump.

    • Nikola Opačak
    • , Dmitry Kazakov
    •  & Benedikt Schwarz

  • Article |

    Laser-based time transfer with near quantum-limited acquisition and timing is demonstrated that can support femtosecond precision over 102 dB link loss, more than sufficient for future time transfer to geosynchronous orbits for future optical clock networks.

    • Emily D. Caldwell
    • , Jean-Daniel Deschenes
    •  & Laura C. Sinclair

  • Article
    | Open Access

    Slow nonlinearities of a free-running microresonator-filtered fibre laser are shown to transform temporal cavity solitons into the system’s dominant attractor, leading to reliable self-starting oscillation of microcavity-solitons that are naturally robust to perturbations.

    • Maxwell Rowley
    • , Pierre-Henry Hanzard
    •  & Alessia Pasquazi

  • Article
    | Open Access

    A simple and power-efficient microcomb source is used to drive complementary metal–oxide–semiconductor silicon photonic engines, a step towards the next generation of fully integrated photonic systems.

    • Haowen Shu
    • , Lin Chang
    •  & John E. Bowers

  • Article |

    An optical vector convolutional accelerator operating at more than ten trillion operations per second is used to create an optical convolutional neural network that can successfully recognize handwritten digit images with 88 per cent accuracy.

    • Xingyuan Xu
    • , Mengxi Tan
    •  & David J. Moss

  • Article |

    An integrated photonic processor, based on phase-change-material memory arrays and chip-based optical frequency combs, which can operate at speeds of trillions of multiply-accumulate (MAC) operations per second, is demonstrated.

    • J. Feldmann
    • , N. Youngblood
    •  & H. Bhaskaran

  • Article |

    By monolithically integrating piezoelectric actuators on ultralow-loss photonic circuits, soliton microcombs—a spectrum of sharp lines over a range of optical frequencies—can be modulated at high speeds with megahertz bandwidths.

    • Junqiu Liu
    • , Hao Tian
    •  & Tobias J. Kippenberg

  • Article |

    A turnkey regime for soliton microcombs is demonstrated, in which solitons are generated by switching on a co-integrated pump laser, eliminating the need for photonic and electronic control circuitry.

    • Boqiang Shen
    • , Lin Chang
    •  & John E. Bowers

  • Article |

    Wave destabilization is demonstrated in semiconductor ring lasers operating at low pumping levels, where ultrafast gain recovery leads to the emergence of a frequency comb regime owing to phase turbulence.

    • Marco Piccardo
    • , Benedikt Schwarz
    •  & Federico Capasso

  • Article |

    A massively parallel coherent light detection and ranging (lidar) scheme using a soliton microcomb—a light source that emits a wide spectrum of sharp lines with equally spaced frequencies—is described.

    • Johann Riemensberger
    • , Anton Lukashchuk
    •  & Tobias J. Kippenberg

  • Letter |

    A low-power, fixed microwave signal in combination with an optical-pump signal generates an optical frequency comb that spans the whole wavelength range of the telecommunications C-band, with possible applications ranging from spectroscopy to optical communications.

    • Alfredo Rueda
    • , Florian Sedlmeir
    •  & Harald G. L. Schwefel

  • Letter |

    Integrating an optical Kerr frequency comb source with an electronically excited laser pump produces a battery-powered comb generator that does not require external lasers, moveable optics or laboratory set-ups.

    • Brian Stern
    • , Xingchen Ji
    •  & Michal Lipson

  • Letter |

    A broadband, compact, all-electrically driven mid-infrared frequency comb based on a quantum cascade laser widens the scope of application of combs in this frequency range beyond that of sources which depend on a chain of optical components.

    • Andreas Hugi
    • , Gustavo Villares
    •  & Jérôme Faist

  • News & Views |

    A 'comb' of photons at evenly spaced frequencies in the extreme ultraviolet has been generated. It will allow a more precise search for variation in the fine-structure constant, which sets the strength of the electromagnetic force. See Letter p.68

    • Linda Young

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