Long-period fibre gratings written by CO2 exposure of H2-loaded, standard fibres

Long-period fibre gratings written by CO2 exposure of H2-loaded, standard fibres

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High quality long-period gratings have been written in standard fibres pre-H2-loaded, using CO2 laser exposure at low intensity. The formation of OH bonds in the fibre core probably explains the index change when such a moderate intensity exposure is applied.


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