论文部分内容阅读
研究了偏心激励多模聚合物光纤横截面的光功率分布。用光线追迹法计算了不同的激励源偏心距离和光纤长度时 ,光纤出射端横截面的光功率分布 ,并用二维CMOS图像探测器阵列进行了测量。数值计算和实验测量的结果均表明随着激励源偏心距的增加 ,光功率分布由光纤轴心向外偏移并形成环状 ;光功率分布在圆周方向的均匀性随着光纤长度的增加而趋于均匀。对中心激励的弯曲光纤光功率分布的测量结果表明 ,当弯曲曲率半径远大于临界曲率半径时 ,光功率分布无显著展宽 ,光功率分布随曲率半径的减小而向曲率外侧偏移 ;当光纤弯曲半径接近于临界曲率半径时 ,光功率分布显著展宽。
The optical power distribution of eccentric excitation multimode polymer optical fiber was studied. The optical power distribution of the exit cross section of the fiber was calculated by ray tracing method with different excitation source eccentricity distance and fiber length, and measured by two-dimensional CMOS image detector array. The results of numerical calculation and experimental measurements show that with the increase of excitation source eccentricity, the optical power distribution deviates outward from the axis of the fiber and forms a ring shape. The uniformity of optical power distribution in the circumferential direction increases with the increase of fiber length To be uniform. The measurement results of the optical power distribution of the center-excited bending optical fiber show that when the radius of curvature is much larger than the critical radius of curvature, the optical power distribution does not broaden significantly, and the optical power distribution shifts to the outside of the curvature as the radius of curvature decreases. When the radius of curvature is close to the critical radius of curvature, the optical power distribution broadens significantly.