The chirp and apodization characteristics of long-period grating (LPG) are analyzed, and the theoretic foundation of adjustable gain flattening filter based on LPG is provided.
分析了长周期光纤光栅(LPG)的啁啾特性和切趾特性，给出了基于LPG的增益平坦滤波器可调的理论依据。
On the basis of the coupled mode theory, the finite-difference method is used to simulate the transmission of Bragg bright solitons in parabolic squared-apodization fiber gratings.
本文在耦合模理论的基础上，运用有限差分法数值模拟了布拉格亮孤子在抛物线平方变迹光纤光栅中的传输特性。
On the basis of the coupled mode theory, the finite-difference method is used to simulate the transmission of Bragg bright solitons in parabolic squared-apodization fiber gratings.
本文在耦合模理论的基础上，运用有限差分法数值模拟了布拉格亮孤子在抛物线平方变迹光纤光栅中的传输特性。
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