Linze Nicolas, Tihon Pierre, Verlinden Olivier, Mégret Patrice, Wuilpart Marc
Electromagnetism and Telecommunication Department, Faculté Polytechnique, Université de Mons, Place du Parc 20, 7000 Mons, Belgium.
Opt Express. 2013 Mar 11;21(5):5606-24. doi: 10.1364/OE.21.005606.
In this paper we propose a novel kind of multi-point vibration sensor based on the polarization properties of light. Its principle relies on the combination of mechanical transducers with fiber Bragg gratings. When subject to vibrations, the mechanical transducers induce birefringence variations within the fiber and in turn modify the state of polarization, which appears as a power variation after going through a polarizer. The FBGs reflect light from different positions of the sensing fiber and provide wavelength multiplexing. We show that this sensor can provide the vibration frequencies in a quasi-distributed manner.
在本文中，我们提出了一种基于光的偏振特性的新型多点振动传感器。其原理依赖于机械换能器与光纤布拉格光栅的结合。当受到振动时，机械换能器会在光纤内引起双折射变化，进而改变偏振状态，经过偏振器后会表现为功率变化。光纤布拉格光栅从传感光纤的不同位置反射光，并提供波长复用。我们表明，这种传感器能够以准分布式方式提供振动频率。
