介绍了应用于掺铒光纤光源的几种滤波器的研究状况，阐述了它们的优缺点，简述了长周期光纤光栅滤波器的设计过程。
Several kinds of filters used in EDSFS are presented. Their advantages and disadvantages are introduced, the fabrication of long-period fiber grating filters are proposed briefly.
介绍了应用于掺铒光纤光源的几种滤波器的研究状况，阐述了它们的优缺点，简述了长周期光纤光栅滤波器的设计过程。
Several kinds of filters used in EDSFS are presented. Their advantages and disadvantages are introduced, the fabrication of long-period fiber grating filters are proposed briefly.
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