本文推广了Abrams和Henderson的方法,将它用来研究方形截面空心介质波导激光器中各高阶波导摸的耦合损耗。分析了波导激光器的横模鉴别和交叉耦合问题,得出了有意义的结果。应该指出,关于上述问题的系统研究,在现有文献中尚未见到,特别是对于方形波导。 In this paper, we extend the method of Abrams and Henderson to study the coupling losses of high-order waveguides in square cross-section hollow dielectric waveguide lasers. The transverse mode discrimination and cross-coupling problem of waveguide laser are analyzed, and meaningful results are obtained. It should be noted that systematic studies on the above problems have not been seen in the existing literature, especially for square waveguides.