Investigation on the Data Processing Method for High-Precision Alignment of PM Fibers
The extinction ratio is the characteristic parameter of polarization-maintaining (PM) fiber couplers.The detection accuracy of polarization angle is related to the extinction ratio,and affects the thin-diameter PM fiber coupler performances greatly.A series of image processing steps including median filtering,adaptive image morphology,and maximum variance threshold segmentation method are used to get the outline of optical fibers.The minimum squares method is used to get the maximum intensity of the light.The experimental data are processed using the Fourier filtering method and influences of the manufacturing error and random errors of fibers are reduced.By fitting the experiment data with cubic spine method,the position of the fast axis of PM fibers is determined.Experiments show that this method can precisely determine the fast axis position of PM fibers,and it can achieve the high precision alignment of 80 μm PM fibers.
PM fiber Auto-aligning Fourier filtering Image processing Cubic spine fitting
RONG Wei-bi ZHANG Wei WANG Le-feng ZHANG Hai-ling SUN Li-ning
MOE Key Laboratory of Micro-systems and Micro-structures Manufacturing,Harbin Institute of Technolog State Key Laboratory of Robotics and system, Harbin Institute of Technology, China
国际会议
中国微米纳米技术学会第14届学术年会、第3届国际年会暨第6届微米纳米技术“创新与产业化国际研讨与展览会(CSMNT2012 & ICMAN2012)
杭州
英文
1-6
2012-11-04（万方平台首次上网日期，不代表论文的发表时间）