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代码说明：

说明：  建立三维的FBG模型，用来仿真透射谱，设计波长在1550nm,光栅长度等多个参数可以手动调整.但由于光栅较短，所以反射率较小(A three-dimensional FBG model is established and the transmission spectrum is simulated. The design wavelength is 1550 nm, the grating length and other parameters can be adjusted manually.But the reflectivity is small due to the length of FBG is short.)

文件列表：

三维单模光纤FBG-Ncore按正弦起伏，Tz=0.6029um(电磁波，频域法).mph, 77540072 , 2019-06-26