Ultra-low-loss nanofiber Fabry-Perot cavities optimized for cavity quantum electrodynamics.

  title={Ultra-low-loss nanofiber Fabry-Perot cavities optimized for cavity quantum electrodynamics.},
  author={S. K. Ruddell and Karen E. Webb and Mitsuyoshi Takahata and Shinya Kato and Takao Aoki},
  journal={Optics letters},
  volume={45 17},
We demonstrate the fabrication of ultra-low-loss, all-fiber Fabry-Perot cavities that contain a nanofiber section, optimized for cavity quantum electrodynamics. By continuously monitoring the finesse and fiber radius during the fabrication of a nanofiber between two fiber Bragg gratings, we were able to precisely evaluate taper transmission as a function of radius. The resulting cavities have an internal round-trip loss of only 0.31% at a nanofiber waist radius of 207 nm, with a total finesse… 

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