Cryogenic Temperature Response Of Fibre Optic Long Period Gratings.
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James, Stephen W.
Tatam, Ralph P.
Twin, Andrew
Bateman, Rod
Noonan, Paul
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0957-0233
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Stephen W. James, Ralph P. Tatam, Andrew Twin, Rod Bateman and Paul Noonan; Cryogenic Temperature Response Of Fibre Optic Long Period Gratings. Measurement Science and Technology, 2003, Vol. 14 Iss. 8, pp 1409-1411
Abstract
The thermal response of the attenuation bands of an optical fibre long period grating was monitored over a temperature range of 4.2–280 K. A linear dependence of the central wavelength of the band, of gradient 0.2 nm K-1, was observed over the range 77–280 K. A measurable wavelength shift was observed at temperatures as low as 20 K.
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Keywords
fibre optic sensor, fibre grating, long period grating, temperature, cryogenic