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

S. K. Ruddell, K. E. Webb, M. Takahata, S. Kato, T. Aoki

Research output: Contribution to journalArticlepeer-review

Abstract

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 of 1380, and a maximum expected internal cooperativity of ∼1050 for a cesium atom on the nanofiber surface. Our ability to fabricate such high-finesse nanofiber cavities may open the door for the realization of high-fidelity scalable quantum networks.

Original languageEnglish
Pages (from-to)4875-4878
Number of pages4
JournalOptics Letters
Volume45
Issue number17
DOIs
Publication statusPublished - 2020 Sep 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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