Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Optoelectronics·Laser》 2018-06
Add to Favorite Get Latest Update

Investigation of composite multi-wavelength reference stablization method for FBG demodulator in unsteady temperature environment

JIANG Jun-feng;ZANG Chuan-jun;WANG Shuang;ZHANG Xue-zhi;LIU Kun;YANG Yi-ning;Xie Ren-wei;Fan Xiao-jun;LIU Tie-gen;Key Laboratory of Opto-Electronics Information Technology,Institute of Optical Fiber Sensing of Tianjin University,School of Precision Instrument & Opto-Electronics Engineering,Tianjin University;  
This paper analyzes the temperature characteristics of tunable fiber Fabry-Perot(F-P)filter,and explains why the demodulation accuracy of fiber Bragg grating(FBG)is reduced in unsteady temperature environment.In this case,we propose an FBG stablization method based on F-P etalon and HCN composite multi-wavelength reference.The method decomposes FBG demodulation errors into F-P etalon wavelength reference error and linear fitting error.First of all,according to the theory of multibeam interference and the fact that the absorption peak wavelengths of HCN gas cell do not change with temperature,the linear error of the reference wavelength of the etalon and the position of the HCN absorption peak are obtained.Then we get the linear fitting error of each FBG by polynomial fitting algorithm.Finally the FBG absolute wavelength demodulation value is obtained by compensating the wavelength reference error and the linear fitting error.The experimental results show that compared with HCN gas cell single wavelength correction,the FBG demodulation error of composite multi-wavelength reference is reduced from ±56.8 pm to±11.7 pm,and the standard deviation is reduced from 24.0 pm to 4.6 pm in 20℃~60℃temperature changing environment,which effectively improves the demodulation stability of FBG.
【Fund】: 国家重大科学仪器设备开发专项(2013YQ030915);; 国家“973”计划(2010CB327802);; 国家自然科学基金(61227011、61378043、61475114和61505139);; 教育部科学技术研究重大项目(313038);; 天津市自然科学基金(13JCYBJC16200);; 深圳市科技创新委员会(JCYJ20120831153904083);; 中国空间技术研究院CAST创新基金资助项目
【CateGory Index】: TN713
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved