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Panda type elliptical ring core few-mode fiber

机译：熊猫型椭圆环核心几型光纤

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摘要

We present a new type of few-mode fiber which features an elliptical ring-core with two stress rods. This type of few-mode fiber can separate the adjacent modes from each other. By using the high refractive index difference of 0.03 between the core and cladding and the birefringence caused by stress rods and elliptical ring core, 10 modes can be obtained. And the minimal effective refractive index difference between adjacent modes can be measured as 2.83 x 10(-4). The performance of its anti-bending test shows that this special structure can achieve low loss characteristic and maintaining its mode intensity profile under the bending radius of 1.5 cm. And the effective refractive index differences (Delta n(eff)) are greater than 2 x 10(-4) with the bending radius of 1 cm. It was measured to have good fault-tolerant ability under the condition of unsatisfactory structure. Finally, the simulation shows that the minimal Delta n(eff) of this type few-mode fiber in the whole C + L band is greater than 1.91 x 10(-4). This special fiber is targeted at applications in spatial division multiplexing of optical channels, without the need for multiple-input multiple-output (MIMO) signal processing.
机译：我们提出了一种新型的几种少量模式光纤，其具有具有两个应力杆的椭圆形环芯。这种类型的少量模式光纤可以彼此分离相邻模式。通过使用芯和包层之间的0.03的高折射率差和由应力杆和椭圆形环芯引起的双折射，可以获得10种模式。并且相邻模式之间的最小有效折射率差异可以测量为2.83×10（-4）。其防弯曲试验的性能表明，这种特殊结构可以在1.5厘米的弯曲半径下实现低损耗特性并保持其模式强度曲线。并且有效的折射率差异（ΔN（eff））大于2×10（-4），弯曲半径为1cm。在不令人满意的结构条件下，测量它具有良好的容错能力。最后，模拟表明，整个C + L频段中这种类型的少量模式光纤的最小ΔN（Eff）大于1.91×10（-4）。该特殊光纤在光通道的空间分割多路复用中的应用中针对应用，而无需多输入多输出（MIMO）信号处理。

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