Fitting algorithm for interferometric spectrum of fiber Fabry-Perot cavity acoustic sensors

2019 2nd International Conference of Green Buildings and Environmental Management

生态环境科学

Yu, Changkun^1 ; Cheng, Jin^1 ; Tian, Yangmeng^1 ; Zou, Xiaoping^1

Research Center for Sensor Technology, Beijing Key Laboratory for Sensor, Ministry of Education, Key Laboratory for Modern Measurement and Control Technology, School of Applied Sciences, Beijing Information Science and Technology University, Beijing

100101, China^1

关键词: Cavity length;    Fiber Fabry-Perot;    Fitting algorithms;    Fitting degree;    High sensitivity;    Interference spectrum;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/310/3/032038/pdf
DOI  :  10.1088/1755-1315/310/3/032038

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Fiber Fabry-Perot cavity acoustic sensors have been widely used in some fields recently due to its advantages such as high sensitivity, resistance to electromagnetic interference, etc. In order to control the performance of the sensors, it is necessary to precisely adjust the cavity length. In order to obtain the cavity length efficiently and accurately, a fitting algorithm for interference spectrum is proposed in this paper. The base of the algorithm is the principle of light interference and the key of the algorithm is to find the peaks and valleys of the interference spectrum. Experimental results show that the algorithm has a high fitting degree.