The Detection of Defects in Optical Fibers Using a Hybrid Opto-electronic Correlator

作     者：LIU Yange LIU Wei ZHANG Yimo ZHOU Ge (College of Precision Instrument and Opto-electronics Engineering, Tianjin University Opto-electronic Information Science and Technology Lab., Tianjin 300072, China) 

作者机构：天津大学 光电信息技术科学开放实验室 天津 

出 版 物：《Chinese Journal of Lasers》 (中国激光(英文版))

年 卷 期：2000年第9卷第3期

页      面：15-21页

核心收录：

学科分类：0808[工学-电气工程] 080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：SupportedbytheNationalNatureScienceFoundationofChinaunderGrantNo.6 98770 11 

主　　题：joint transform correlation Fourier transform optical fiber defect detection 

摘      要：A hybrid opto-electronic correlator for detecting defects i n optical fibers is proposed. After the light from a He-Ne laser being expanded and filtered it is not collimated but directly passes a Fourier transform lens and illuminates a reference fiber and a test fiber at the same input plane. The Fourier transform spectrum of the two fibers is therefore obtained at the rear focal plane of the lens, where it is sampled via a CCD array connected with a computer through a frame grabber. The computer performs filter, inverse Fourier transform and setting threshold operation on classification. The system is an equivalent of joint transform correlator with a Fourier lens of long focal length. The experiment results for optical fibers having incoordinate defects are presented. The results indicate that the system can be used for fiber defect detection, and has the advantages of high identification, compact configuration, easy adjustment and flexible manipulation.