Abstract
Hollow-core fibres with a single ring of glass capillaries surrounding the core are receiving increased attention due to their relative simplicity, low loss, and broad transmission windows [1,2]. Recently it was reported that such fibres are effectively single-mode at all guided wavelengths if the inner diameter d of the cladding capillaries and the core diameter D satisfy the relationship d/D = 0.682 [3]. Endlessly single-mode behaviour is highly desirable in applications such as beam delivery and fibre gyroscopes. Here we address another important issue: the dependence of the bend-sensitivity on fibre structure and wavelength. We present a simple analytical expression for the minimum radius to which the fibre can be bent before the losses increase dramatically. The analysis can also be used to calculate the optimum bend-radius for suppression of a given higher-order mode.
© 2017 IEEE
PDF ArticleMore Like This
Riccardo Pennetta, Michael T. Enders, Michael H. Frosz, Francesco Tani, and Philip St.J. Russell
ce_7_1 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2019
N. N. Edavalath, R. Beravat, M. C. Günendi, G. K. L. Wong, M. H. Frosz, and P. St. J. Russell
CJ_3_3 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2017
J .R. Hayes, F. Poletti, and D. J. Richardson
CJ2_2 The European Conference on Lasers and Electro-Optics (CLEO/Europe) 2011