The typical erbium-doped fiber gain spectrum is a combination of a high-intensity region and a flat part spectrum, and the power difference has limited the bandwidth of EDSFS.
典型的掺铒光纤增益谱线由一个谱峰和后面的谱肩组成，它们之间的功率差异造成了对光纤陀螺可应用的EDSFS带宽和平坦度的限制。
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。
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