Simultaneous measurement of temperature and strain based on arc-induced long-period fibre gratings |
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| Authors: | Rego G. Marques P.V.S. Salgado H.M. Santos J.L. |
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| Affiliation: | Unidade de Optoelectronica e Sistemas Electronicos, INESC, Porto, Portugal; |
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| Abstract: | A study on arc-induced long-period fibre gratings (LPFGs) revealed that their strain sensitivity depends on the electric current of the arc discharge. Based on that property, a sensor scheme comprising two concatenated LPFGs was implemented for discrimination of temperature and strain effects. This sensor presented resolutions of /spl plusmn/0.1/spl deg/C//spl radic/Hz and /spl plusmn/35 /spl mu//spl epsiv///spl radic/Hz, respectively. |
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