摘要
根据耦合模理论的理想近似,把光纤光栅区域的电场横向分量看作无微扰的很多理想模式的叠加,将光纤光栅的折射率的周期变化视为介电常数的微扰,在此用运极化电流概念下的模式耦合系数,对耦合模方程进行化简,进而求出反射率、布拉格反射波长的特征参数的表达式,理论计算与实验结果符合良好,从而证明理论的正确性。
Based on the ideal approximation of the coupled - mode theory, the transverse component of the electrical field was regarded as the superposition of the non - perturbation some ideal mode , the periodic change of FBGg refractive index was regarded as the perturbation of the dielectric constant , coupled - mode coefficient of the polarization current g conception was used, predigest the equation of coupledmode , solved the refractive index and the characteristic parameter expression of FBG＇s reflection wavelength , the theoretical calculation results are coincident with the experimental results. The theory is demonstrated correct.
出处
《长春理工大学学报（自然科学版）》
2007年第1期37-39,共3页
Journal of Changchun University of Science and Technology(Natural Science Edition)
关键词
光纤布拉格光栅
模式耦合
极化电流
fiber Bragg grating
coupled -mode
polarization current
