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Analysis on the Reflection Characteristic and the Dispersion Compensation Performance of Linear Chirped Fiber Grating

机译：线性Chi光纤光栅的反射特性和色散补偿性能分析

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摘要

Applying chirped fiber grating is an appropriate approach to achieve dispersion compensation in fiber-optic communication. In order to explore the reflection and dispersion compensation properties of Linear Chirped Fiber Grating (LCFG), the reflection coefficient expression of LCFG was deduced based on coupled-mode theory; numerical simulation is performed on LCFG reflectance spectrum. The results show that while Gaussian distribution control parameters a increases, reflective index becomes smoother and the reflective bandwidth becomes narrower. The maximum reflectivity R_(max) decreases continuously while the chirp coefficient F increases. Phase changes of optical pulse when propagating in the grating is discussed with a simplified model. The dispersion compensation property of LCFG is discussed in the view of phase changes. Analysis results show that the propagate distance of optical pulse with LCFG dispersion compensation is 3 order of magnitudes greater than that without LCFG dispersion compensation under the same dispersion standard.
机译：应用chi光纤光栅是在光纤通信中实现色散补偿的合适方法。为了探讨线性Chi光纤光栅（LCFG）的反射和色散补偿特性，基于耦合模理论推导了LCFG的反射系数表达式。在LCFG反射光谱上进行了数值模拟。结果表明，当高斯分布控制参数a增大时，反射指数变得更平滑，反射带宽变得更窄。当线性调频系数F增加时，最大反射率R_（max）连续减小。用简化模型讨论了光脉冲在光栅中传播时的相位变化。从相位变化的角度讨论了LCFG的色散补偿特性。分析结果表明，在相同色散标准下，具有LCFG色散补偿的光脉冲的传输距离比没有LCFG色散补偿的光脉冲的传输距离大3个数量级。

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