多波长啁啾光纤光栅叠栅的数值分析和设计

为了研究多波长啁啾光纤光栅叠栅的反射和时延特性,提出多波长啁啾光纤光栅叠栅的耦合模理论方法,得到波长间隔Δλ=1.6nm的4波长和8波长的啁啾叠栅的反射谱和时延特性的数值分析结果,并设计了波长间隔Δλ=0.4nm的8波长的啁啾叠栅,数值分析结果与实验结果非常一致.结果表明,多波长啁啾光纤光栅叠栅的耦合模理论是可靠的,可用来分析其各种特性,此方法对多波长啁啾叠栅的设计和制作具有重要的参考价值.

Numerical analysis and design of superimposed multi-wavelength fiber Bragg gratings

In order to study the characteristics of superimposed multi-wavelength fiber Bragg gratings, the coupled-mode theory of the superimposed multi-wavelength fiber Bragg gratings was presented and the numerical analysis result about the reflected spectra and time delay of 4 and 8 wavelengths superimposed FBG whose Wavelength gap equals to 1.6nm was obtained. The reflected spectra of 8 wavelength superimposed FBG whose wavelength gap equal to 0.4nm is designed. The numerical result was in good agreement with the experimental results. The result show that the coupled-mode theory of the superimposed multiwavelength fiber Bragg gratings is reliable, which can be used to analyze the characteristics of superimposed multi-wavelength fiber Bragg gratings and is conducive to the design and fabrication of superimposed multi-wavelength fiber Bragg gratings.