论文部分内容阅读
曲率半径(ROC)是光纤连接器端面三个最重要的控制参数之一。介绍了测量该曲率半径的一种算法:重叠四步平均法(OAF)。对算法过程中涉及的被测波面相位主值计算及表面面形重构等方面作了理论分析,给出了模拟结果。分析了移相器位移误差对曲率半径测量的影响,给出了ROC误差与移相器位移误差关系的曲面图,并对四步平均法和OAF算法产生的ROC误差作了比较。结果表明:在有移相器位移误差情况下,OAF算法优于四步平均法,且在普通的标定误差≤5%和非线性误差≤5%所构成的移相器位移误差范围内,由OAF算法产生的光纤连接器端面ROC测量误差<7.2×10-5。
The radius of curvature (ROC) is one of the three most important control parameters for the fiber optic connector end face. An algorithm for measuring the radius of curvature is introduced: Overlay Four-Step Averaging (OAF). The calculation of the principal value of the measured wavefront phase, the reconstruction of the surface profile and so on in the course of the algorithm are theoretically analyzed and the simulation results are given. The influence of the displacement error of the phase shifter on the measurement of the radius of curvature is analyzed. The surface plot of the relationship between the ROC error and the displacement error of the phase shifter is given. The four-step average method and the ROC error generated by the OAF algorithm are compared. The results show that the OAF algorithm outperforms the four-step averaging method in the case of displacement error of the phase shifter, and in the range of displacement error of the phase shifter formed by the ordinary calibration error ≤5% and the nonlinear error ≤5% Optical fiber connector end face ROC measurement error generated by OAF algorithm is less than 7.2 × 10-5.