A new research facility, using tapered optical fibres as an interface between trapped, ultracold atoms and light propagating in an optical fibre, has come online. The first results were published recently here:

Ruddell, S. K., Webb, K. E., Herrera, I., Parkins, A. S., & Hoogerland, M. D. (2017). Collective strong coupling of cold atoms to an all-fiber ring cavity. Optica, 4 (5), 576-579. 10.1364/OPTICA.4.000576