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本文细致地分析了双模光纤中存在的模式及其椭圆芯光纤的特性，并详细地讨论了椭圆芯光纤在光纤传感、色散补偿、模式转换等多方面的应用。
This paper analyzes in detail the mode existing in the dual-mode fiber and its characteristics of the elliptical core fiber, and discusses in detail the application of the elliptic core fiber in the aspects of optical fiber sensing, dispersion compensation and mode conversion.