An optical fibre sensor for dynamic deformation measurements based on the intensity modulation of a low-coherence source

An optical fibre sensing technique for the measurement of dynamic deformations using a Michelson interferometer is reported. The method applied to interferometers with an initial path unbalance of around 1 cm is based on the rf intensity modulation of a low-coherence source. A large measurement range of 1 cm is intrinsic to the method and with an adequate demodulation process sensitivity better than 10 μm is obtained. This novel approach allows for measuring dynamic deformations with a bandwidth up to 100 Hz.


Publié dans:
Journal of Modern Optics, 50, 8, 1189-1194
Année
2003
Publisher:
Taylor & Francis
ISSN:
0950-0340
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Autres identifiants:
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 Notice créée le 2008-09-29, modifiée le 2019-03-16

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