Nanofiber Fabry-Perot microresonator for non-linear optics and cavity quantum electrodynamics

TL;DR

This paper reports the experimental development of a nanofiber-based Fabry-Perot microresonator with high finesse and low loss, suitable for advanced non-linear optics and cavity QED applications.

Contribution

It introduces a novel nanofiber Fabry-Perot microresonator with low losses and high finesse, enabling strong coupling regimes in cavity quantum electrodynamics.

Findings

Finesse of 86 achieved in the microresonator

On-resonance transmission of 11%

Suitable for non-linear optics and strong coupling QED

Abstract

We experimentally realize a Fabry-Perot-type optical microresonator near the cesium D2 line wavelength based on a tapered optical fiber, equipped with two fiber Bragg gratings which enclose a sub-wavelength diameter waist. Owing to the very low taper losses, the finesse of the resonator reaches F = 86 while the on-resonance transmission is T = 11 %. The characteristics of our resonator fulfill the requirements of non-linear optics and cavity quantum electrodynamics in the strong coupling regime. In combination with its demonstrated ease of use and its advantageous mode geometry, it thus opens a realm of applications.