Cladding-surrounding interface insensitive long-period grating

Cladding-surrounding interface insensitive long-period grating

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A long period grating is presented, the resonant peak of which is not sensitive to the interface between the cladding and the surrounding media of a fibre. The spectral behaviour of the resonant peak is investigated using index matching oils and mechanical scratching on the cladding surface of the fibre.


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