Accurate Analysis of Multi-Mode Interferometric Optical Fiber Sensor  

作　　者：Lijun LI Congying JIA Qian MA Tianzong XU 

机构地区：[1]College of Electronic and Information Engineering,Shandong University of Science and Technology,Qingdao 266590.China [2]State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology,Qingdao 266590,China

出　　处：《Photonic Sensors》2024年第1期48-58,共11页光子传感器（英文版）

基　　金：This work was supported by the State Key Laboratory of Mining Disaster Prevention and Control,Shandong University of Science and Technology(Grant Nos.MDPC201602 and MDPC2022ZR04);Department of Education1of Shandong Province(Grant No.J06P14);The Qingdao Feibo Technology Co.,Ltd.(Grant No.02040102401);Postdoctoral Research Foundation of China(Grant Nos.200902574 and 20080441150).

摘　　要：In view of the problem that the sensing characteristics of the multi-mode interferometric fiber sensors cannot be accurately analyzed,an analysis method based on the fast Fourier transform(FFT)and inverse fast Fourier transform(IFFT)is proposed and demonstrated theoretically and experimentally.The suitabilities of the rectangular window function with the narrow main lobe(high spectrum resolution)and low side lobe(high main mode energy leakage)and the Hanning window function with the wide main lobe(low spectrum resolution)and high side lobe(high energy concentration)in this kind of sensor analysis are discussed,respectively.This method can not only realize the sensing performance analysis of the various modes,but also overcome the inconsistency of the different interference wavelength(dip)sensing characteristics in the conventional analysis methods.At the same time,this method is also beneficial to solve the repetitive problem of such sensors.

关 键 词：Window function FFT optical fiber interferometric sensor analysis method 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]