Hertz-linewidth semiconductor lasers using CMOS-ready ultra-high-Q microresonators

@article{Jin2020HertzlinewidthSL,
  title={Hertz-linewidth semiconductor lasers using CMOS-ready ultra-high-Q microresonators},
  author={Warren Jin and Qi-Fan Yang and Lin Chang and Boqiang Shen and Heming Wang and Mark A. Leal and Lue Wu and Maodong Gao and Avi Feshali and Mario Paniccia and Kerry J. Vahala and John Edward Bowers},
  journal={Nature Photonics},
  year={2020}
}
Driven by narrow-linewidth bench-top lasers, coherent optical systems spanning optical communications, metrology and sensing provide unrivalled performance. To transfer these capabilities from the laboratory to the real world, a key missing ingredient is a mass-produced integrated laser with superior coherence. Here, we bridge conventional semiconductor lasers and coherent optical systems using CMOS-foundry-fabricated microresonators with a high Q factor of over 260 million and finesse over 42… 

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