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Showing 1–8 of 8 results
Advanced filters: Author: Avi Feshali Clear advanced filters

  • Integrated optical frequency combs are powerful tools for optical spectroscopy. Here, authors demonstrate low-power, detectable-rate soliton microcombs from telecom to visible bands, including wavelength-multiplexed operation, using ultra-low-loss silicon nitride waveguides.

    • Peng Liu
    • Qing-Xin Ji
    • Kerry J. Vahala
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-6

  • The authors demonstrate thin silicon nitride waveguide spirals that enable release-free phase-modulation. The presented modulators achieve a Vπ of 8.98 V with 1.13 dB of insertion loss at a modulation frequency of 704 MHz over a 90 nm optical bandwidth.

    • Scott E. Kenning
    • Tzu-Han Chang
    • Sunil A. Bhave
    ResearchOpen Access
    Nature Communications
    Volume: 17, P: 1-9

  • Using two-point optical frequency division based on a frequency-agile single-mode dispersive wave, a microwave signal source with record-low phase noise using a microcomb is demonstrated, offering over tenfold lower phase noise than state-of-the-art approaches.

    • Qing-Xin Ji
    • Wei Zhang
    • Kerry Vahala
    ResearchOpen Access
    Nature Photonics
    Volume: 19, P: 624-629

  • Bright solitons are produced through the interaction of pulse pairs generated via a continuous-wave fibre laser, which pumps two coupled microresonators featuring normal dispersion. Multicolour pulse pairs over multiple rings can also be generated, of great promise for applications such as all-optical soliton buffers and memories, study of quantum combs and topological photonics.

    • Zhiquan Yuan
    • Maodong Gao
    • Kerry Vahala
    ResearchOpen Access
    Nature Photonics
    Volume: 17, P: 977-983

  • 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
    Research
    Nature Photonics
    Volume: 15, P: 346-353