Period dependent temperature and ambient index effects on long period fibre gratings

DOWKER, P., GHASSEMLOOY, Z, RAY, A.K., O'FLAHERTY, Fin and MANGAT, Pal (2003). Period dependent temperature and ambient index effects on long period fibre gratings. In: PROSSER, S. J. and LEWIS, E., (eds.) Sensors and Their Applications. CRC Press.

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Abstract

The ambient index and temperature effects on the spectral profiles of two sets of long period gratings (LPGs) of different periods were investigated. The shorter period LPGs were found to be more sensitive than the longer period LPGs over identical ambient index ranges but less sensitive over identical temperature ranges. The coupling wavelength shifts due to temperature are also seen to be linear and in opposite directions in each set of LPGs and unlike the ambient index shifts there seems to be no obvious modal dependency with respect to sensitivity in any individual LPG. The conclusion to this investigation is that it may be possible to design an LPG of such a period that parts of the spectral profile are unaffected by temperature whilst maintaining a reasonable ambient index sensitivity.

Item Type: Book Section
Research Institute, Centre or Group: Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Infrastructure Management
Depositing User: Helen Garner
Date Deposited: 11 Aug 2014 15:22
Last Modified: 19 Aug 2015 18:09
URI: http://shura.shu.ac.uk/id/eprint/8343

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