@ARTICLE {33403,
author={C. Novo and D. C. Choudhury and B.  Siwicki and R. T. Thomson and J.D.S. Shephard},
doi={10.1364/OE.394100},
journal={Optics Express},
title={Femtosecond laser machining of hollow-core negative curvature fibres},
year={2020},
month={August},
volume={28},
number={17},
pages={1-11},
ISSN={}
}