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.

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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.

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