Fabrication and characterisation of circularly birefringent helical fibres

Fabrication and characterisation of circularly birefringent helical fibres

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A technique for fabricating helical-core circularly birefringent fibres is reported. Extremely high levels of circular birefringence are achieved (B = 2.1 × 10-4 at 633 nm). Because of its unique structure, this fibre remains single-mode up to V values of 25.


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