Backscattering measurement of bending-induced birefringence in single mode fibres

Abstract
The local distribution of birefringence in a very low birefringence single mode fibre less than 1 km long is measured by analysing the backscattered light. The experimental results of bending-induced birefringence measurements for various bending radii are in good agreement with those calculated. For 130 μm diameter fibre wound around cylinders of radii 15 cm and 8 cm, the bending-induced birefringence βb(15 cm)=9°/m and βb(8 cm)=34°/m, respectively, at λ=904 nm.

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