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Simple index modulation profile with fast-converging design optimization for multichannel fiber Bragg grating filters

机译:用于多通道光纤布拉格光栅滤波器的简单指数调制配置文件,具有快速收敛的设计优化

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摘要

In this paper, a novel hybrid algorithm featuring a simple index modulation profile with fast-converging optimization is proposed towards the design of dense wavelength-division-multiplexing systems (DWDM) multichannel fiber Bragg grating (FBC) filters. The approach is based on utilizing one of other FBG design approaches that may suffer from spectral distortion as the first step, then performing Lagrange multiplier optimization (LMO) for optimized correction of the spectral distortion. In our design examples, the superposition method is employed as the first design step for its merits of easy fabrication, and the discrete layer-peeling (DLP) algorithm is used to rapidly obtain the initial index modulation profiles for the superposition method. On account of the initially near-optimum index modulation profiles from the first step, the LMO optimization algorithm shows fast convergence to the target reflection spectra in the second step and the design outcome still retains the advantage of easy fabrication.
机译:在本文中,针对密集波分复用系统(DWDM)多通道光纤光栅(FBC)滤波器的设计,提出了一种具有简单索引调制配置文件和快速收敛优化的新型混合算法。该方法基于将第一步可能会遭受频谱失真的其他FBG设计方法利用为基础,然后执行拉格朗日乘数优化(LMO)以对频谱失真进行优化校正。在我们的设计实例中,叠加法由于其易于制造的优点而被用作第一步设计步骤,而离散层剥离(DLP)算法被用于快速获得叠加法的初始折射率调制曲线。由于第一步中最初接近最佳的折射率调制曲线,因此LMO优化算法在第二步中显示出快速收敛到目标反射光谱,并且设计结果仍然保留了易于制造的优点。

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