The stress distribution in an optical fiber with single stress element is calculated and analyzed. The stress oscillation magnitudes related to mode coupling are characterized. The coupling ability between the fundamental mode ${\mathrm{H}\mathrm{E}}_{11}$ and other modes is demonstrated and compared. The strongest coupling is occurred between the fundamental modes $\mathrm{H}{\mathrm{E}}_{11}^{+}$and$\mathrm{H}{\mathrm{E}}_{11}^{-}$. The coupling strength from$\mathrm{H}{\mathrm{E}}_{11}-\mathrm{H}{\mathrm{E}}_{21}$, $\mathrm{H}{\mathrm{E}}_{11}-\mathrm{H}{\mathrm{E}}_{22}$, $\mathrm{H}{\mathrm{E}}_{11}-\mathrm{H}{\mathrm{E}}_{31}$, $\mathrm{H}{\mathrm{E}}_{11}-\mathrm{H}{\mathrm{E}}_{41}$, $\mathrm{H}{\mathrm{E}}_{11}-\mathrm{H}{\mathrm{E}}_{12}$ and $\mathrm{H}{\mathrm{E}}_{11}-\mathrm{H}{\mathrm{E}}_{51}$ is decreased in turn. Possible coupling between the fundamental mode ${\mathrm{H}\mathrm{E}}_{11}$ and other higher order modes is much smaller and can be ignored.

中文翻译：

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单应力元件光纤的耦合能力比较

计算并分析了具有单个应力元素的光纤中的应力分布。表征了与模式耦合有关的应力振荡幅度。基本模式之间的耦合能力${\mathrm{H}\mathrm{E}}_{11}$和其他模式进行了演示和比较。基本模式之间发生最强的耦合$\mathrm{H}{\mathrm{E}}_{11}^{+}$和$\mathrm{H}{\mathrm{E}}_{11}^{--}$。耦合强度从$\mathrm{H}{\mathrm{E}}_{11}--\mathrm{H}{\mathrm{E}}_{\mathrm{21岁}}$， $\mathrm{H}{\mathrm{E}}_{11}--\mathrm{H}{\mathrm{E}}_{22}$， $\mathrm{H}{\mathrm{E}}_{11}--\mathrm{H}{\mathrm{E}}_{31}$， $\mathrm{H}{\mathrm{E}}_{11}--\mathrm{H}{\mathrm{E}}_{41}$， $\mathrm{H}{\mathrm{E}}_{11}--\mathrm{H}{\mathrm{E}}_{12}$ 和 $\mathrm{H}{\mathrm{E}}_{11}--\mathrm{H}{\mathrm{E}}_{51}$依次减少。基本模式之间可能的耦合${\mathrm{H}\mathrm{E}}_{11}$ 和其他高阶模式要小得多，可以忽略不计。