光学学报, 2019, 39 (5): 0506005, 网络出版: 2019-05-10
光纤及双光纤扰模器远/近场扰模性能的模拟分析 下载: 1009次
Simulation Analysis of Far and Near Field Scrambling Properties of Fibers and Double-Fiber Scrambler
光纤光学 视向速度测量 扰模特性 光线追迹 谱线漂移 fiber optics radial velocity measurement scrambling performances ray tracing spectral line shift
摘要
在高精度视向速度测量系统中,圆形光纤逐渐被多边形光纤替代,结合多边形光纤、透镜和圆形光纤的扰模方案也被陆续提出。通过光线追迹的方法,对圆形、八边形截面的两种光纤以及基于这两种光纤的双光纤扰模器的扰模性能进行了模拟分析。模拟结果表明:虽然圆形光纤有较好的远、近场角向扰模,但是径向扰模效果不佳;八边形光纤的近场径向和角向扰模性能均较优,但远场扰模与圆形光纤没有明显差异;双光纤扰模器能有效提高光纤扰模性能,而使用了八边形光纤的双光纤扰模器的远、近场扰模性能均较优。
Abstract
Circular core fibers have been gradually replaced with polygonal core fibers in the high-precision radial velocity measurement systems. Further, the scrambling schemes combining polygonal fibers, lenses, or circular fibers have been subsequently proposed. This study simulated the scrambling properties of circular and octagonal fibers together with the double-fiber scrambler based on these two fibers using the ray tracing method. The simulation results show that although circular fibers have good angular scrambling properties in both the far and near fields, their radial scrambling properties are not good. For octagonal fibers, the near field scrambling is better than that of circular fibers, whereas their far field scrambling is not obviously different from that of circular fibers. A double-fiber scrambler can effectively improve the fiber scrambling performance. In addition, a double-fiber scrambler with octagonal fibers exhibits excellent scrambling performances in both the far and near fields.
陈平, 黄凯, 叶慧琪, 韩建, 郝志博, 肖东. 光纤及双光纤扰模器远/近场扰模性能的模拟分析[J]. 光学学报, 2019, 39(5): 0506005. Ping Chen, Kai Huang, Huiqi Ye, Jian Han, Zhibo Hao, Dong Xiao. Simulation Analysis of Far and Near Field Scrambling Properties of Fibers and Double-Fiber Scrambler[J]. Acta Optica Sinica, 2019, 39(5): 0506005.