We report on kagome-lattice photonic microcells with low losses, large outer diameters, and large cores. The large (40-70 mu m) cores are accommodated by tapering the fibers and splicing the reduced ends to a single-mode fiber. We demonstrate the repeatability of this process and obtain splice losses of 0.6 dB by optimizing the taper transition length. Narrow electromagnetically induced transparencies and saturable absorption are demonstrated in an acetylene-filled photonic microcell.
Wheeler, N. V., Grogan, M. D. W., Light, P. S., Couny, F., Birks, T. A., & Benabid, F. (2010). Large-core acetylene-filled photonic microcells made by tapering a hollow-core photonic crystal fiber. Optics Letters, 35(11), 1875-1877. https://doi.org/10.1364/OL.35.001875