对获得多波长同时产生的可调控的频率转换器件进行了研究。通过分析非线性晶体中耦合光强随传播距离的变化，提出了一种基于晶体中光强分布获得非线性结构的方法。针对和频过程，利用MATLAB软件进行仿真，设计出了6个和频过程同时发生的非周期结构。为灵活调控各个非线性过程的输出强度，得到任意形状的目标功率谱，提出在设计过程中引入权重系数。对和频及倍频产生的研究表明：获得的非线性结构不仅实现了多波长的同时输出，而且可以任意调节输出光功率谱。该设计方法速度快、效率高，可以为实际制作非线性光学器件提供理论指导。

Controllable frequency conversion devices, with the generation of multiple-wavelength, are designed. We analyze the variation of light intensity in nonlinear crystal with propagation distance. A method is proposed to design nonlinear structure based on the distribution of light intensity. MATLAB software is used to simulate sum frequency generation. An aperiodic structure is obtained to achieve simultaneous six sum-frequency-generations. The weighting coefficient is introduced to flexibly modify output intensity and obtain objective spectrum with arbitrary shape. By analyzing sum-frequency-generation and second-harmonic-generation, the obtained structure can not only generate multiple-wavelength, but also arbitrarily adjust the optical power of output wavelength. Our proposed method has advantages of fast speed and high efficiency. It can provide a good guidance for the fabrication of nonlinear optical devices.