本文导出了任意折射分布的多量子阱波导芯子区域的转移矩阵,用非等效折射近似得到了TE和TM两种偏振的色散关系.理论的精确性经数值计算比较证明是完全可靠的. In this paper, we derive the transfer matrix of MQW core region with arbitrary refraction distribution and obtain the dispersion relation between TE and TM polarizations using non-equivalent refraction approximation. The theoretical accuracy is proved to be completely reliable by numerical comparison.