单端输入非线性定向耦合器的近似解(英文)

The Approximate Solution of the Single-input Nonlinear Optical Directional Coupler

本文提出单端输入非线性定向耦合器在最常用情况下 ,即输入功率接近特征功率时的解析近似解。在计算过程的较早步骤引入近似 ,就可以将非线性耦合器所满足的积分方程加以简化 ,由此得到简单函数形式的解而不是通常的椭圆函数解。文中给出了数值计算的结果并与精确解和 A .T.Pham等人的近似解结果进行了比较 ,我们的结果比 A.T.

An approximate solution has been presented for the single-input nonlinear optical directional coupler under the most commonly used condition:operating near the critical power.By introducing the approximation in previous step,a simplified integral equation has been obtained.It can be integrated as simple functions instead of elliptic functions.Numerical examples of our results have been given and compared with the exact solution and the approximate solution derived by A.T.Pham et al.Our results are more accurate than that of A.T.Pham et al.