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Showing 1–13 of 13 results
Advanced filters: Author: Qi-Fan Wu Clear advanced filters

  • Dispersion engineering is pivotal in nonlinear photonics but traditionally fixed by post-fabrication immutability. Here, the authors demonstrate integrated chalcogenide microresonators with arbitrarily reconfigurable dispersion, providing a scalable and reprogrammable architecture for multifunctional photonic circuits.

    • Di Xia
    • Liyang Luo
    • Bin Zhang
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-8

  • 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
    Research
    Nature
    Volume: 582, P: 365-369

  • Here, the authors demonstrate the use of chaos to obtain 2-octave comb generation. The deformation lifts the circular symmetry and creates chaotic tunneling channels that enable broadband collection of intracavity emission with a single waveguide, introducing a new degree of freedom to microcomb studies.

    • Hao-Jing Chen
    • Qing-Xin Ji
    • Yun-Feng Xiao
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-6

  • A compact optical frequency division system with magnesium-fluoride-microresonator-based frequency references and silicon-nitride-microresonator-based comb generators is reported, offering a soliton pulse train at 25-GHz microwaves with an absolute phase noise of –141 dBc Hz–1 and timing noise below 546 zs Hz–1/2 at a 10-kHz offset frequency.

    • Xing Jin
    • Zhenyu Xie
    • Qi-Fan Yang
    Research
    Nature Photonics
    Volume: 19, P: 630-636

  • Here the authors explore the noise spectrum of soliton microcomb when the pump is decoupled from the solitons motion by balancing the Raman shift with the emitted dispersive wave. Based on the analysis of the phase noise and the soliton repetition rate, they identify the uncorrelated thermal fluctuations as underlying mechanism.

    • Qi-Fan Yang
    • Qing-Xin Ji
    • Kerry Vahala
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-10

  • Optical absorption and nonlinear index are important performance drivers in devices like microcombs. Here the authors use resonance-enhanced nonlinear spectroscopy to characterize absorption limits and nonlinear index for some integrated photonic materials.

    • Maodong Gao
    • Qi-Fan Yang
    • Kerry J. Vahala
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-8

  • 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

  • Achieving high output power and low noise integrated lasers is a major challenge. Here the authors experimentally demonstrate integrated lasers from a Si/SiN heterogeneous platform that shows Hertz-level linewidth, paving the way toward fully integrating low-noise silicon nitride photonics in volume using real devices for lasing.

    • Chao Xiang
    • Joel Guo
    • John E. Bowers
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-8

  • Quantum jitter fundamentally limits the performance of microresonator frequency combs. The timing jitter of the solitons that generate the comb spectra is analysed, reaching the quantum limit and establishing fundamental limits for soliton microcombs.

    • Chengying Bao
    • Myoung-Gyun Suh
    • Kerry J. Vahala
    Research
    Nature Physics
    Volume: 17, P: 462-466