High extinction, broadband polarisers using long-period fibre gratings in few-mode fibres

High extinction, broadband polarisers using long-period fibre gratings in few-mode fibres

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Long-period fibre gratings in specially designed birefringent few-mode fibres are used to demonstrate spectrally flat polarisers with bandwidths of 10 nm and polarisation extinction levels of 20 dB. This is enabled by the special dispersive properties of few-mode fibres, yielding fibre polarisers with performance approaching that of bulk-optic devices.


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      • S. Ramachandran , Z. Wang , M.F. Yan . Bandwidth control of long-period grating-based mode converters in few-mode fibers. Opt. Lett.

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