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arXiv · 2008.12374

Ultra-low-loss nanofiber Fabry-P\'erot cavities optimized for cavity quantum electrodynamics

Samuel K. Ruddell·Karen E. Webb·Mitsuyoshi Takahata·Shinya Kato·Takao Aoki
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Abstract

We demonstrate the fabrication of ultra-low-loss, all-fiber Fabry-P\'erot cavities containing a nanofiber section, optimized for cavity quantum electrodynamics. By continuously monitoring the finesse and fiber radius during fabrication of a nanofiber between two fiber Bragg gratings, we are 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 $\sim$ 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.

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Samuel K. Ruddell, Karen E. Webb, Mitsuyoshi Takahata, Shinya Kato, Takao Aoki. 2020-08-27. Ultra-low-loss nanofiber Fabry-P\'erot cavities optimized for cavity quantum electrodynamics. https://doi.org/10.1364/ol.396725

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