Using the power coupling coefficient equations of coupled power theory,the total power coupling coefficient between the 2n bright loops and corresponding LP_(0n) modes was obtained.

• 运用耦合功率理论中的功率耦合系数方程,算得2n个亮环与相应LP0n模间的2n个功率耦合系数,将之相加得到总的功率耦合系数。