Fiber ring resonator with a nanofiber section for chiral cavity quantum electrodynamics and multimode strong coupling

We experimentally realize an optical fiber ring resonator that includes a tapered section with a subwavelength-diameter waist. In this section, the guided light exhibits a significant evanescent field which allows for efficient interfacing with optical emitters. A commercial tunable fiber beam split...

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Bibliographic Details
Published in:Optics letters 2017-01, Vol.42 (1), p.85-88
Main Authors: Schneeweiss, Philipp, Zeiger, Sophie, Hoinkes, Thomas, Rauschenbeutel, Arno, Volz, Jürgen
Format: Article
Language:English
Subjects:
Cavity resonators
Coupling
Emitters
Fibers
Nanostructure
Parameters
Resonators
Trapping
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Summary:We experimentally realize an optical fiber ring resonator that includes a tapered section with a subwavelength-diameter waist. In this section, the guided light exhibits a significant evanescent field which allows for efficient interfacing with optical emitters. A commercial tunable fiber beam splitter provides simple and robust coupling to the resonator. Key parameters of the resonator such as the out-coupling rate, free spectral range, and birefringence can be adjusted. Thanks to the low taper- and coupling-losses, the resonator exhibits an unloaded finesse of F=75±1, sufficient for reaching the regime of strong coupling for emitters placed in the evanescent field. The system is ideally suited for trapping ensembles of laser-cooled atoms along the nanofiber section. Based on measured parameters, we estimate that the system can serve as a platform for optical multimode strong coupling experiments. Finally, we discuss the possibilities of using the resonator for applications based on chiral quantum optics.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.42.000085