12th International Conference on Optical Fiber Sensors 1997
DOI: 10.1364/ofs.1997.owc7
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Simultaneous Measurement of Temperature and Strain using PANDA Fiber Grating

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Cited by 38 publications
(17 citation statements)
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“…However, when temperature and strain simultaneously affect an FBG, the measurement of the wavelength shift does not provide temperature-insensitive strain measurement. To discriminate these two contributions, structures such as two FBGs, superimposed FBGs 2 , hybrid FBG with long period grating 3 and high birefringence FBGs 4 are required but they increase the complexity of the sensors.…”
Section: Introductionmentioning
confidence: 99%
“…However, when temperature and strain simultaneously affect an FBG, the measurement of the wavelength shift does not provide temperature-insensitive strain measurement. To discriminate these two contributions, structures such as two FBGs, superimposed FBGs 2 , hybrid FBG with long period grating 3 and high birefringence FBGs 4 are required but they increase the complexity of the sensors.…”
Section: Introductionmentioning
confidence: 99%
“…As in the previous solution, using different wavelengths provides different sensitivities. In both cases, a broadband optical source or different narrowband optical sources are needed, increasing the cost of the demodulation technique.Use of specialty optical fibers (polarization maintaining fibers [17,18] or photonic crystal fibers [19,20]) that yield a very well-conditioned system. Here, attention has to be paid on the splicing between specialty and standard fibers as well as on the injection of light.…”
Section: Discrimination Between Temperature and Strain Effectsmentioning
confidence: 99%
“…These solutions do not yield a localized sensor and often contain splices inside the composite material, which are poorly resilient. Solutions based on specialty optical fibres (FBGs written into polarization maintaining fibres 7,8 or microstructured optical fibers 9 ) give a very well conditioned system but they remain expensive, somewhat difficult to splice with standard optical fiber and require a tight control of the input state of polarization. A pre-treatment 10,11,12 of the sensors (placement of a special coating, partial etching or encapsulating) are other possibilities to distinguish strain and temperature effects.…”
Section: Introductionmentioning
confidence: 99%