We review the recent progress on the enhanced inhibited coupling in kagome hollow-core photonic crystal fiber by introducing negative curvature in the fiber-core shape. We show that increasing the hypocycloid contour curvature leads to a dramatic decrease in transmission loss and optical overlap with the silica surround and to a single modedness. Fabricated hypocycloid-core hollow-core photonic crystal fibers with a transmission loss in the range of 20-40 dB/km and for a spectral range of 700 nm-2000 nm have now become typical.
Inhibited coupling hollow-core photonic crystal fiber / Benabid, F.; Gérôme, F.; Vincetti, Luca; Debord, B.; Alharbi, M.; Bradley, T.. - ELETTRONICO. - 8994:(2014), p. 89940A. (Intervento presentato al convegno SPIE - Photonic and Phononic Properties of Engineered Nanostructures IV tenutosi a San Francisco, CA; United States nel 3-6 February 2014) [10.1117/12.2047913].