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首页> 外文期刊>Optoelectronics, IET >Use of Gaussian beam divergence to compensate for misalignment of underwater wireless optical communication links
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Use of Gaussian beam divergence to compensate for misalignment of underwater wireless optical communication links

机译：使用高斯光束发散来补偿水下无线光通信链路的未对准

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The vast majority of underwater wireless optical communication systems use collimated blue/green laser beams to deliver high-speed data over a transmission range of a few metres to tens of metres. However, such systems are extremely susceptible to misalignment of the transmitter and the receiver. The mitigation techniques for misalignment reported in the literature are complex and costly at times. In this study, the authors consider the simple approach of increasing the divergence angle of the transmitted Gaussian beam to mitigate misalignment. Both plane and spherical beams are considered as the limitation cases. Using Monte Carlo simulations, the authors show that an optimum divergence angle for the maximum acceptable lateral offset exists with respect to the receiver sensitivity in clear waters while this is not an efficient method in harbour waters. Results demonstrate that there is a design trade-off between acceptable lateral offset, power loss and channel bandwidth. Furthermore, the authors show how the proposed scheme of beam divergence affects the maximum allowed link span as well as the channel bandwidth for a given distance.
机译：绝大多数水下无线光通信系统使用准直的蓝/绿激光束在几米到几十米的传输范围内传输高速数据。但是，这样的系统极易受到发射器和接收器未对准的影响。文献中报道的用于对准误差的缓解技术有时是复杂且昂贵的。在这项研究中，作者考虑了增加透射高斯光束的发散角以减轻失准的简单方法。平面光束和球形光束都被视为限制情况。使用蒙特卡洛模拟，作者表明，在清澈的海水中，相对于接收器灵敏度而言，存在最大可接受横向偏移的最佳发散角，而在港口水域中，这不是一种有效的方法。结果表明，在可接受的横向偏移，功率损耗和信道带宽之间存在设计折衷。此外，作者们展示了所提出的光束发散方案如何影响最大允许链路跨度以及给定距离的信道带宽。

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