Ma Jing, Zhao Fang, Tan Liying, Yu Siyuan, Han Qiqi
National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China.
Appl Opt. 2009 Sep 20;48(27):5184-9. doi: 10.1364/AO.48.005184.
Efficient coupling of coherent plane waves into single-mode fibers is a key technology for free-space optical communication at 1550 nm. Here we deal with the influence of random angular jitter on a plane wave to single-mode fiber coupling. The expression of mean-coupling efficiency in the presence of random jitter is handled in the pupil plane. First, an analytical expression of the mean-coupling efficiency is derived for the zero bias error case. Then the bias error was taken into account. By minimizing the coupling efficiency penalty, the optimum value of design parameter beta of fiber-coupled optical systems in the presence of random jitter is obtained. The results obtained here will be useful in facilitating parametric estimation and optimization of fiber-coupled optical systems.
将相干平面波高效耦合到单模光纤中是1550纳米自由空间光通信的一项关键技术。在此，我们探讨随机角抖动对平面波到单模光纤耦合的影响。在光瞳平面中处理存在随机抖动时的平均耦合效率表达式。首先，推导了零偏置误差情况下平均耦合效率的解析表达式。然后考虑了偏置误差。通过最小化耦合效率损失，获得了存在随机抖动时光纤耦合光学系统设计参数β的最佳值。此处得到的结果将有助于促进光纤耦合光学系统的参数估计和优化。
