阐述了LPG的传感特性和金属外包层对其的影响，为动态增益平坦滤波器结构的原理提供理论支持。
We expatiate the sensing characteristic of LPG and the influence of its metal over-cladding in order that we can provide theoretic support for the principle of this dynamic filter.
可根据不同需要在不同的温度范围内调节滤波器的损耗峰值和带宽，实现增益平坦滤波器的动态可调。
Thus, we can regulate the parameters of the filter at the different temperature range according to different requirement, and realize dynamic regulation of the gain flattening filter.
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。
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.
使用光纤环形镜(FLM)作为增益平坦滤波器进行L波段掺铒光纤放大器的增益平坦化实验，实现了高增益值的平坦输出。
Experiments demonstrate that L-band EDFA will achieve high flat gain by employing a gain flat filter based on fiber loop mirror (FLM).
从理论上分析了利用光纤环形镜（FLM）中的偏振耦合效应作为滤波器，对掺铒光纤放大器（EDFA）实现增益平坦化的方法。
The method of erbium-doped fiber amplifier(EDFA) gain flattening using a fiber loop mirror(FLM) acting as a wavelength filter was analyzed in theory.
结合不使用增益平坦技术条件下增益特性曲线的特点，设计了一种由三个LPG组成的均衡滤波器。
Given the amplifier's gain curve without using any gain flattening techniques, the gain flattening filter consisting of three LPGs is designed.
根据陷波滤波器均衡法的原理，用光无源器件耦合器来修正掺铒光纤放大器增益谱线的不平坦，并探索出一种可以方便快捷地得到耦合器相关参数的方法。
Coupler is used to rectify EDFA's gain spectrum based on the principle of gain equalizing technology. A method was suggested to achieve the suitable parameters of the coupler.
模拟计算结果表明，用该方法得到的滤波谱能使放大器的增益平坦在原放大器可能得到的最高增益水平，同时因滤波器的引入带来的噪声特性恶化也最小。
Simulation results show that by using this iteration algorithm, the flattened gain can reach the possible highest value of the original amplifier, and noise penalty is the minimum.
模拟计算结果表明，用该方法得到的滤波谱能使放大器的增益平坦在原放大器可能得到的最高增益水平，同时因滤波器的引入带来的噪声特性恶化也最小。
Simulation results show that by using this iteration algorithm, the flattened gain can reach the possible highest value of the original amplifier, and noise penalty is the minimum.
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