Abstract
Cascaded long period fiber gratings are fabricated and investigated for use in intensity-based fiber optic mechanical vibration sensors. The cascaded LPGs are inscribed in photosensitive fiber by means of point-by-point technique with UV KrF excimer laser and examined in terms of axial strain sensitivity. In the experiment, much higher strain-sensitivity than that of single LPG is obtained and mechanical vibration sensing is successfully demonstrated.
© 2013 IEICE
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