Altintas, A.Tanyer, S. G.2016-02-082016-02-0819930306-8919http://hdl.handle.net/11693/26051It has long been recognized that the bending losses in weakly guiding optical fibres are independent of the polarization for large bend radius. Here, we show this fact using the volume equivalent current method. The procedure is then applied to a helically bent fibre and it is shown that the radiation from the helical fibre is also independent of the polarization as long as the fibre is weakly guiding.EnglishPolarizationBent optical fibersCircularly bent fiberHelical fibersVolume equivalent current methodWeakly guiding optical fibersOptical fibersArticle10.1007/BF00420406