Mode-locked lasers articles within Nature Photonics

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  • Article
    | Open Access

    An integrated high-energy laser that combines a passively Q-switched laser cavity based on a silicon-nitride photonic integrated circuit with an optically pumped gain layer consisting of thulium-doped alumina is reported, representing a pivotal advancement in integrated pulsed lasers.

    • Neetesh Singh
    • , Jan Lorenzen
    •  & Franz X. Kärtner

  • Article |

    Using CMOS-ready ultra-high-Q microresonators, a highly coherent electrically pumped integrated laser with frequency noise of 0.2 Hz2 Hz−1, corresponding to a short-term linewidth of 1.2 Hz, is demonstrated. The device configuration is also found to relieve the dispersion requirements for microcomb generation that have limited certain nonlinear platforms.

    • Warren Jin
    • , Qi-Fan Yang
    •  & John E. Bowers

  • Article |

    By suppressing the second- and third-order intracavity dispersion using an intracavity spectral pulse shaper, a mode-locked laser that emits pure-quartic soliton pulses that arise from the interaction of the fourth-order dispersion and the Kerr nonlinearity is demonstrated.

    • Antoine F. J. Runge
    • , Darren D. Hudson
    •  & Andrea Blanco-Redondo

  • Letter |

    Using a femtosecond mode-locked laser and a frequency-locked electric signal, a displacement measurement method that offers a >MHz measurement speed, sub-nanometre precision and a measurement range of more than several millimetres is achieved, facilitating the study of broadband, transient and nonlinear mechanical dynamics in real time.

    • Yongjin Na
    • , Chan-Gi Jeon
    •  & Jungwon Kim

  • Article |

    The combined technique of dual-comb multi-heterodyne detection and Fourier-transform analysis allows simultaneous acquisition and monitoring of the phase pattern of a generic frequency comb demonstrating the high degree of coherence of the emission of two quantum cascade laser frequency combs.

    • Francesco Cappelli
    • , Luigi Consolino
    •  & Saverio Bartalini

  • Review Article |

    Frequency comb spectroscopy is a recent field of research that has blossomed in the past five years. This Review discusses developments in the emerging and rapidly advancing field of atomic and molecular broadband spectroscopy with frequency combs.

    • Nathalie Picqué
    •  & Theodor W. Hänsch

  • Article |

    Using an ultrafast, time-stretched frequency comb laser operating with repetition rates from 7.6 MHz to 18.9 MHz, a rapid and large-volumetric-field optical coherence tomography at an imaging rate of up to 7.5 volumes per second is demonstrated.

    • Meena Siddiqui
    • , Ahhyun S. Nam
    •  & Benjamin J. Vakoc

  • Review Article |

    The recent realization that 2D layered materials could modulate light with superior performance has prompted intense research and significant advances, paving the way for realistic applications.

    • Zhipei Sun
    • , Amos Martinez
    •  & Feng Wang

  • Review Article |

    This Review explains the concept of dissipative solitons and their application to high-energy mode-locked fibre laser cavities. Dynamics and effects such as dissipative soliton ‘explosions’ and ‘rain’ are summarized, and an outlook of the field is also provided.

    • Philippe Grelu
    •  & Nail Akhmediev

  • News & Views |

    Researchers have demonstrated that selectively exciting ensembles of laser modes using an innovative pumping scheme can tune the emission lines of a random laser from weakly interacting to strongly correlated, thus paving the way towards the realization of mode-locked random lasers.

    • Heinz Kalt

  • Letter |

    Researchers report the first observation of the synchronous oscillation of electromagnetic modes in a cavity — known as mode-locking — in random lasers.

    • Marco Leonetti
    • , Claudio Conti
    •  & Cefe Lopez

  • News & Views |

    Common sense suggests that complex phenomena such as Bose–Einstein condensation require complicated experimental set-ups to be observed. But when it comes to the field of photonics, the simplest system may sometimes reveal the most unexpected surprises.

    • Andrea Fratalocchi

  • News & Views |

    Frequency combs are created by stabilizing the evolution of the carrier–envelope phase of a mode-locked laser. Researchers have now demonstrated a simplified method of creating frequency combs that enables trains of identical pulses to be easily produced.

    • Steven T. Cundiff

  • Letter |

    Scientists report a mode-locking regime of an erbium-doped fibre laser in which the laser pulse evolves as a similariton in the gain segment of the cavity and transforms into a soliton in the rest of the cavity. The findings constitute the first observation of amplifier similaritons in a laser cavity and are likely to be applicable to various other nonlinear systems.

    • Bulent Oktem
    • , Coşkun Ülgüdür
    •  & F. Ömer Ilday

  • News & Views |

    The use of a specially designed cavity to enhance the intensity of femtosecond ultraviolet pulses dramatically increases the rate at which non-classical states of light can be produced.

    • R. Jason Jones

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