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Updated: Feb 7, 2026

Encapsulation and Permeability Characteristics of Plasma Polymerized Hollow Particles
Published on: August 16, 2012
Hollow-core conjoined-tube negative-curvature fibre with ultralow loss
Shou-Fei Gao1, Ying-Ying Wang2, Wei Ding3
1Beijing Engineering Research Centre of Laser Technology, Institute of Laser Engineering, Beijing University of Technology, 100124, Beijing, China.
Abstract:
Countering the optical network 'capacity crunch' calls for a radical development in optical fibres that could simultaneously minimize nonlinearity penalties, chromatic dispersion and maximize signal launch power. Hollow-core fibres (HCF) can break the nonlinear Shannon limit of solid-core fibre and fulfil all above requirements, but its optical performance need to be significantly upgraded before they can be considered for high-capacity telecommunication systems. Here, we report a new HCF with conjoined-tubes in the cladding and a negative-curvature core shape. It exhibits a minimum transmission loss of 2 dB km-1 at 1512 nm and a <16 dB km-1 bandwidth spanning across the O, E, S, C, L telecom bands (1302-1637 nm). The debut of this conjoined-tube HCF, with combined merits of ultralow loss, broad bandwidth, low bending loss, high mode quality and simple structure heralds a new opportunity to fully unleash the potential of HCF in telecommunication applications.
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