Photonics Research Center, School of Science, Harbin Engineering University, Harbin 150001, China.
Opt Lett. 2011 Jun 1;36(11):2056-8. doi: 10.1364/OL.36.002056.
A compact in-fiber integrated fiber-optic Michelson interferometer based accelerometer is proposed and investigated. In the system, the sensing element consists of a twin-core fiber acting as a bending simple supported beam. By demodulating the optical phase shift, we obtain that the acceleration is proportional to the force applied on the central position of the twin-core fiber. A simple model has been established to calculate the sensitivity and resonant frequency. The experimental results show that such an accelerometer has a sensitivity of 0.09 rad/g at the resonant frequency of 680 Hz.
提出并研究了一种基于光纤集成迈克尔逊干涉仪的紧凑型光纤加速度计。在该系统中，传感元件由双芯光纤构成，作为弯曲的简支梁。通过解调光相移，我们得到加速度与施加在双芯光纤中心位置的力成正比。建立了一个简单的模型来计算灵敏度和共振频率。实验结果表明，这种加速度计在 680 Hz 的共振频率下具有 0.09 rad/g 的灵敏度。
