A position-detectable optical distributed vibration sensor using an additional sub-loop
A position-detectable optical distributed vibration sensor using an additional sub-loop
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DOI：
10.1109/icsens.2004.1426232
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
T. Omori;K. Hashimoto;M. Yamaguchi
中科院分区：
文献类型：
--
作者：
T. Omori;K. Hashimoto;M. Yamaguchi
本文提出了一种简单的分布式振动传感器系统，该系统采用光纤环形干涉仪，该干涉仪具有通过3dB耦合器耦合到主环的附加子环。通过比较光在子环中传播n次时干涉光束的多次响应，该系统可以检测出主环中声振动的位置和振幅。通过用脉冲电流驱动光源，在时域中容易地提取多个响应。理论和实验表明，该系统能够检测到的振幅和位置的声振动发生在主环具有合理的精度。
The paper proposes a simple distributed vibration sensor system which employs an optical fibre ring interferometer having an additional sub-loop coupled to the main ring by a 3 dB coupler. Comparing multiple responses of interfered beams by the light travelling n times in the sub-loop with each other, the proposed system can detect the position as well as the amplitude of acoustic vibration occurred in the main ring. The multiple responses are easily extracted in the time domain by driving an optical source with a pulsed current. It is demonstrated theoretically and experimentally that the proposed system is able to detect both the amplitude and position of the acoustic vibration occurring in the main ring with reasonable accuracy.