College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China.
Opt Lett. 2012 Nov 15;37(22):4768-70. doi: 10.1364/ol.37.004768.
A simple and low-cost vibration sensor based on single-mode nonadiabatic fiber tapers is proposed and demonstrated. The environmental vibrations can be detected by demodulating the transmission loss of the nonadiabatic fiber taper. Theoretical simulations show that the transmission loss is related to the microbending of the fiber taper induced by vibrations. Unlike interferometric sensors, this vibration sensor does not need any feedback loop to control the quadrature point to obtain a stable performance. In addition, it has no requirement for the coherence of the light source and is insensitive to temperature changes. Experimental results show that this sensing system has a wide frequency response range from a few hertz to tens of kilohertz with the maximal signal to noise ratio up to 73 dB.
提出并演示了一种基于单模非绝热光纤锥的简单且低成本的振动传感器。通过解调非绝热光纤锥的传输损耗，可以检测环境振动。理论模拟表明，传输损耗与振动引起的光纤锥微弯有关。与干涉传感器不同，这种振动传感器不需要任何反馈环路来控制正交点以获得稳定的性能。此外，它对光源的相干性没有要求，并且对温度变化不敏感。实验结果表明，该传感系统具有从几赫兹到几十千赫兹的宽频率响应范围，最大信噪比高达 73dB。
