光子晶体光栅反射谱的计算

Simulation Optimization of Photonic Crystal Grating Reflection Spectrum

基于布拉格光纤光栅多元参数对反射光谱作用进行预估分析,能够更好地了解光纤光栅特性。利用耦合模理论推导适用于光子晶体光栅的反射谱计算公式,结合传输矩阵法研究光子晶体光栅周期、光栅长度等相关光栅参数对反射谱的作用关系,并以真实光栅反射谱数据验证作用关系的正确性。在建立光栅多参数与光栅反射谱作用规律的基础上,利用其反射率与透射率,设计理论光子晶体光栅反射谱预测模型。测试证明:改变光栅周期只会影响中心波长的取值范围;改变光栅长度,图像大致保持一致,且当光栅长度为4.85mm时,达到最优,可以提高光纤光栅特性预测的准确性,降低程序漏洞。

Predictive analysis of the reflection spectrum based on the multi-paraQ``meter parameters of Bragg fiber grating can better understand the characteristics of fiber grating.Using the coupled mode theory to derive the reflection spectrum calculation formula suitable for photonic crystal grating,combined with the transfer matrix method to study the relationship between the grating parameters such as photonic crystal grating period and grating length and the reflection spectrum,and verify the relationship with real grating reflection spectrum data.Correctness.Based on the law of grating multi-parameter and grating reflection spectrum,the theoretical photonic crystal grating reflection spectrum prediction model is designed by using its reflectivity and transmittance.Tests prove that changing the grating period only affects the value range of the center wavelength;changing the length of the grating,the image is almost consistent,and when the grating length is 4.85mm,it is optimal,which can improve the accuracy of fiber grating characteristic prediction and reduce the program Vulnerabilities.