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Temporal differentiators based on highly-structured fibre Bragg gratings

Temporal differentiators based on highly-structured fibre Bragg gratings

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Proposed and experimentally demonstrated is a new class of optimal fibre Bragg grating (FBG) filters for pulse temporal differentiation, which is suited to process waveforms with a spectral extent up to 100 GHz. In particular, high-quality first- and second-order differentiation of 20 and 12.5 Gbit/s pulse trains are demonstrated using first- and second-order 50 GHz bandwidth FBG filters, synthesised by a layer-peeling algorithm and fabricated by continuous writing in hydrogen-loaded standard telecommunication optical fibres.

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