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Omnidirectional Free Space Optical Receiver Architecture

机译：全向自由空间光接收机架构

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摘要

Free Space Optical (FSO) communication is the fusion of wireless technology and optical fiber communications systems. It has the potential of providing fiber optic data rates without the physical restraints of optical fiber cables. This endeavor presents a novel receiver structure with potential for omnidirectional free space optical communications. Interesting approaches for accomplishing omnidirectional free space lasercomm such as direct detection and solar blind non-line of sight UV scattering have been reported over the last few years. However, these technologies have resulted in limited distances of the order of 10 to 100 meters and data rates often limited to less than 1 Mb/s. This endeavor reports the architecture of an omnidirectional receiver setup by integrating an off the shelf detector and a fiber bundle, where the fiber bundle couples omnidirectional photons within its field of view and delivers these photons to the detector. The coupling of light from all directions into a detector is regulated by the cone of the acceptance angle of the fiber. Multiple fibers with overlapping acceptance angles provide the necessary coverage that may be needed to extract the optical signal from the free space optical channel. Simulated results showing the normalized power pattern of the system is presented to demonstrate omnidirectional potential of the structure. Theoretical power level versus distance plot for an FSO System employing On-Off Keying (OOK) is also presented.
机译：自由空间光（FSO）通信是无线技术和光纤通信系统的融合。它具有提供光纤数据速率而又不受光缆物理约束的潜力。这项努力提出了一种具有全向自由空间光通信潜力的新型接收器结构。在过去的几年中，已经报道了完成全方位自由空间激光通信的有趣方法，例如直接检测和日光盲非视线紫外线散射。但是，这些技术导致距离限制在10到100米之间，数据速率通常限制为小于1 Mb / s。这项工作通过集成现成的检测器和光纤束来报告全向接收器设置的体系结构，其中光纤束在其视场内耦合全向光子并将这些光子传递到检测器。来自各个方向的光耦合到检测器中的方式是通过光纤接收角的锥角来调节的。具有重叠接收角的多根光纤可提供从自由空间光通道提取光信号所需的必要覆盖范围。仿真结果显示了系统的归一化功率模式，以证明该结构的全向潜力。还介绍了采用开关键控（OOK）的FSO系统的理论功率水平与距离的关系图。

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