非平整端面光波导光学相控阵输出特性的研究  

Output characteristics of uneven-surface waveguide optical phased array

作　　者：孙艳玲[1] 聂光[1] 石顺祥[1] 马琳[1] 鲁振中[1] 

机构地区：[1]西安电子科技大学物理与光电工程学院,陕西西安710071

出　　处：《红外与激光工程》2015年第9期2747-2751,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金(11304240)

摘　　要：光波导光学相控阵器件端面的平整性对其输出特性有很大影响。基于光场相干叠加原理,建立了非平整端面下光波导光学相控阵的远场光场分布模型,给出了远场光场分布的一般公式,分析了非平整端面如何影响输出面上光场的相位以及输出面相位的变化如何影响远场光场分布。利用该模型计算和分析了倾斜平面、凹面、单层凹陷以及随机起伏面这几种特殊非平整端面下光波导光学相控阵输出光强分布的特点。研究结果表明:当光波导光学相控阵的端面非平整时,会不同程度地改变远场主瓣的位置和强度,影响光束扫描精度和功率。The surface profile is of importance to the output characteristics of the waveguide optical phased array. The far field diffraction model of the array with an uneven surface was established based on the coherent superposition principle. The general formulas of the far optical field distribution were derived using the model. The effects of the surface profile on the output wave phase and the phase on the far optical field distribution were analyzed. When the surface profile was a inclined surface, a concave one, the single depression and the random fluctuation, the output light intensity was researched respectively. The results show that the surface profile has a great influence on the output far optical field and the position and intensity of the main lobe will be changed partly. These will affect the accuracy and power of the scanning beam and is of importance to the application of the waveguide optical phased array.

关 键 词：光波导光学相控阵 相干叠加 非平整端面 远场光场分布模型 

分 类 号：TN252[电子电信—物理电子学]