27 April 2016 Dual hollow-core anti-resonant fibres
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Abstract
While hollow core-photonic crystal fibres are now a well-established fibre technology, the majority of work on these speciality fibres has been on designs with a single core for optical guidance. In this paper we present the first dual hollow-core anti-resonant fibres (DHC-ARFs). The fibres have high structural uniformity and low loss (minimum loss of 0.5 dB/m in the low loss guidance window) and demonstrate regimes of both inter-core coupling and zero coupling, dependent on the wavelength of operation, input polarisation, core separation and bend radius. In a DHC-ARF with a core separation of 4.3 μm, we find that with an optimised input polarisation up to 65% of the light guided in the launch core can be coupled into the second core, opening up applications in power delivery, gas sensing and quantum optics.
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N. V. Wheeler, T. D. Bradley, J. R. Hayes, G. T. Jasion, Y. Chen, S. R. Sandoghchi, P. Horak, F. Poletti, M. N. Petrovich, D. J. Richardson, "Dual hollow-core anti-resonant fibres", Proc. SPIE 9886, Micro-Structured and Specialty Optical Fibres IV, 988617 (27 April 2016); doi: 10.1117/12.2225589; https://doi.org/10.1117/12.2225589
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