用于波导阵列——光纤阵列自动对接的多目标演化算法的研究

开发设计了一种新的列阵自动对接方法,该方法将多目标演化法导入光纤—光波导列阵—光纤列阵的自动对接,并行操作次数较常规遗传法大幅减少.数值仿真表明,对于模场非对称因子为0.4%的单模波导列阵与光纤列阵的双芯对接,能实现0.04 dB的平均端面耦合损耗.用于1×8波导分支耦合器与通道间距误差在0.35 μm以内的光纤列阵对接,自动耦合仿真达到了小于0.1 dB的平均端面耦合损耗,最大值与最小值的差小于0.06 dB.

Study of Multi-Objective Evolutionary Algorithm Applied to Waveguide Array-Fiber Array Automatic Alignment System

A new method for array alignment is designed,which employed multi-objective evolutionary algorithm in automatic alignment among fiber,waveguide splitter and fiber array. Compared to the conventional genetic algorithm,when using this algorithm,the number of parallel operation can be reduced largely. According to the results of the mimic experiments,as the alignment between single mode waveguide array and fiber array is considered,when the mode field′s asymmetrical factor of the single mode waveguide array is 0.4%,the average transverse coupling loss can be 0.04 dB. If the waveguide splitter is a 8-channel splitter and the channel spacing error of the fiber array is within 0.35 m,the results of the mimic experiments of the auto-alignment shows that the average transverse coupling loss can be controlled below 0.1 dB,and the max loss-min loss among the 8-channel is below 0.06 dB.