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首页> 外文期刊>International Journal of Optics >Impact of Temperature and Relative Humidity on PMD in Directly Buried Optical Fibre Cables in Semi-Arid and Tropical Highlands in Kenya
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Impact of Temperature and Relative Humidity on PMD in Directly Buried Optical Fibre Cables in Semi-Arid and Tropical Highlands in Kenya

机译：温度和相对湿度对肯尼亚半干旱和热带高原直埋式光缆中PMD的影响

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The telecommunication industry has implemented fibre deployment guidelines that reliably safeguard cable health during installation in the field. While installed fibre cables remain buried in the field, temperature and moisture in the locality subject them to mechanical expansions and corrosion. Directly buried fibre cables experience accelerated degradation that results from exposure to harsh environments. This increases pulse spreading and overlaps, with a mean time duration, known as Differential Group Delay (DGD), on the signal, as it propagates along the cable. DGD is stochastic; thus, Mean DGD is determined and presented as Polarization Mode Dispersion (PMD). This work undertook a real life assessment of how fluctuations in temperature and relative humidity influence PMD in directly buried fibre optical links, in a case study that focused on the fibre cable network owned by Liquid Telecom Kenya. The network spans across two key climatic ecosystems, namely, rift valley highlands and northern lowlands. The analysis revealed that fibre cables experience higher PMD in semi-arid areas by a factor of 2.6, compared to highland areas.
机译：电信行业已实施了光纤部署指南，该指南在现场安装期间可靠地保护了电缆的健康。尽管已安装的光缆仍埋在现场，但当地的温度和湿气会使它们遭受机械膨胀和腐蚀。直接埋入的光缆会由于暴露于恶劣环境而导致加速降解。当信号沿着电缆传播时，这会增加脉冲扩散和信号上的平均时间持续时间，称为差分群延迟（DGD）。 DGD是随机的;因此，确定平均DGD并将其表示为偏振模色散（PMD）。这项工作进行了现实生活中的评估，以温度和相对湿度的波动如何影响直接掩埋的光纤链路中的PMD为例，该案例研究的重点是Liquid Liquid Kenya拥有的光缆网络。该网络跨越两个关键的气候生态系统，即裂谷高地和北部低地。分析显示，与高地地区相比，光缆在半干旱地区的PMD升高了2.6倍。

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