A novel distributed feedback fiber laser accelerometer

Rui Wang; Yong-jie Wang; Fang Li; Yu-liang Liu

doi:10.1117/12.834944

28 August 2009 A novel distributed feedback fiber laser accelerometer

Rui Wang, Yong-jie Wang, Fang Li, Yu-liang Liu

Proceedings Volume 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging; 73822Z (2009) https://doi.org/10.1117/12.834944
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

A novel distributed feedback fiber laser accelerometer based on silicon rubber is developed. The unique mechanism employed for the accelerometer ensures uniform strain distribution on the fiber laser's Bragg element. A mathematical model of single-degree-of-freedom system is established, giving the expression of the sensitivity and resonant frequency of the accelerometer. A multiple-degree-of-freedom simulation with finite element method is also conducted, giving a more precise prediction of accelerometer's characteristic. Several accelerometers of this type are constructed and tested. The wavelength shift signal is demodulated using phase generated carrier technique. The experimental result shows they have a sensitivity of 72 pm/G and a resonant frequency of 415Hz, which agree well with the simulation results. The minimum detectable signal of the whole sensing system is about 1.5μg. The accelerometer's structure is simple and the components employed are all commercially available, indicating a great potential in practical use.

Citation Download Citation

Rui Wang, Yong-jie Wang, Fang Li, and Yu-liang Liu "A novel distributed feedback fiber laser accelerometer", Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 73822Z (28 August 2009); https://doi.org/10.1117/12.834944

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