光纤布喇格光栅的反射特性研究

Research on the reflection properties of fiber Bragg grating

阐述了由耦合模理论得到的光纤布喇格光栅的反射率的表达式,并且由此表达式导出了光纤布喇格光栅的反射特性和反射中心波长。理论分析了反射波长λ、光栅栅距Λ,折射率微扰的最大值Δnmax,光栅区长度L和反射率Rg之间的关系。

The reflectivity expression of the fiber Bragg grating is obtained from the coupled mode theory. And the reflection properties of the fiber Bragg grating are educed from this expression. The reflection central wavelength is . Furthermore the relationship among the reflec-tion wavelength λ?the grating spacing Λ?the max. of refractive index micro-disturber Δnmax?the grating length L and reflectivity Rg is analyzed in theory.