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Robustness of spatial-coherence multiplexing under receiver misalignment

机译：接收机不对准下空间相干复用的鲁棒性

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摘要

It has been shown previously that the spatial coherence of a source can be modulated and demodulated; hence it can be used as the basis for a new dimension of multiplexing in high-speed optical communication links. We address the sensitivity of such a system to misatignments of the receiver with respect to the beam and examine how changing transverse modes affect the spatial coherence in the lateral direction. Specifically, we show that such a system is surprisingly robust for both lateral offsets, in which the receiver is not properly aligned on the beam center, and rotational offsets, in which the receiver is tilted with respect to the plane of the spatial coherence modulation. The presence of higher-order transverse modes or changes in the transverse-mode structure are also shown to have tittle effect on the system operation.
机译：先前已经表明，可以对源的空间相干性进行调制和解调。因此，它可以用作高速光通信链路中新的复用方式的基础。我们解决了这样的系统对接收器相对于光束的误配的敏感性，并研究了变化的横向模式如何影响横向空间相干性。具体而言，我们表明，这样的系统对于横向偏移（其中接收器未正确对准波束中心对齐）和旋转偏移（其中接收器相对于空间相干调制平面倾斜）而言都出奇地强大。高阶横向模态的存在或横向模态结构的变化也显示出对系统操作具有微不足道的影响。

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