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High-efficiency off-axis coupling of rotating optical signals based on internal conical reflection

机译：基于内圆锥反射的旋转光信号高效率脱轴耦合

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摘要

We propose an off-axis coupling method for rotating optical signals based on the internal conical reflection. An analytic model of off-axis coupling is developed and verified via simulation and experiment. According to theoretical analysis, the coupling efficiency depends on both the reflectivity of, and the number of reflections between, the conical and the circular plane mirrors. When the reflectivity of the conical and the circular plane mirrors are both constant, i.e. n = 0.973, the coupling efficiency is decreased with an increase in number of reflections. Experimental results show good agreement with theoretical predictions. In addition, our experiment demonstrates that the proposed method can achieve a multi-channel signal coupling with a maximum insertion loss of 1.62 dB in channel T1 and 0.98 dB in channel T2.
机译：我们提出了一种基于内部锥形反射旋转光信号的轴轴耦合方法。通过模拟和实验开发和验证了偏离轴耦合的分析模型。根据理论分析，耦合效率取决于反射率，以及圆锥形和圆形平面镜之间的反射次数。当锥形和圆形平面镜的反射率均为恒定的时，即n = 0.973，随着反射数量的增加，耦合效率降低。实验结果与理论预测表现出良好的一致性。此外，我们的实验表明，所提出的方法可以在通道T2中实现具有1.62 dB的最大插入损耗的多通道信号耦合。

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