Temperature-insensitive long period grating sensors in photonic crystal fibre

Temperature-insensitive long period grating sensors in photonic crystal fibre

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A long period grating has been fabricated in endlessly singlemode photonic crystal fibre using a spatially-periodic electric arc discharge. The sensing characteristics of the grating have been studied and it was found to possess an insensitivity to temperature, a bend sensitivity of 3.7 nm · m and a strain sensitivity of −2.0 pm/µɛ


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