光纤波导HE_mn模和EH_mn模的划分方法

光纤波导HE mn 模和EH mn 模的划分方法 CLASSIFICATION OF THE HYBRID MODES IN OPTICAL WAVEGUIDES 方志豪 1 first-author 易小波 1 朱秋萍 1 武汉大学电子信息学学院 武汉大学电子信息学学院 通过理论计算以及与实验对比，提出了划分ＨＥｍｎ模和ＥＨｍｎ模的新的理论判别条件，即：对第１组解，当Ｅｚ与Ｈｚ的系数之比等于一ｓｉｎ－为ＨＥｍｎ模，等于时为ＥＨｍｎ模；对第２组解，当Ｅｚ与Ｈｚ的系数之比等于时为ＨＥｍｎ模，等于一ｓｉｎ－１时为ＥＨｍｎ模，该判别条件与弱导波光纤特征方程有很好的相关性，利用这个判别条件，对比研究了ＨＥＮ”模和ＥＨｍｎ模的ＥｚＨｚ和横向电场的一些特点，得到了苦干与文献不同的结果。 From the theoretical computation and the experimental results, a new criterion of defining HEmn and EHmn modes has been given. That is . for the first group solutions. when the ratio of the coefficient of Ez to that of Hz is sin the modes are HEmn, and when the ratio is, sin-1 0, , the modes are EHmn; for the second group solutions , sin the the modes are HEmnor EHmn , respectively. There is a good correlation between this criterion and the characteristic equations of weakly guiding fibers. Using this criterion , we have studied some features of Ez, Hz and the transverse electric field, and obtained some results which are different from many references. 光纤波导 混合模式 弱导波近似 光纤波导 混合模式 弱导波近似 TN253 国家教委面向二十一世纪教学改革科研基金 1997-03-01 2021-04-01 3