基于亚波长光栅消色差相位延迟器的研究  

Achromatic Phase Retarder Study Based on Subwavelength Grating

作　　者：李娜[1] 孔伟金[1] 季淑英[1] 

机构地区：[1]青岛大学物理科学学院,青岛266071

出　　处：《青岛大学学报（自然科学版）》2016年第4期16-19,共4页Journal of Qingdao University(Natural Science Edition)

基　　金：国家自然科学基金(批准号:11274188)资助

摘　　要：通过对亚波长光栅相位特性的研究，基于严格耦合波理论和遗传算法，设计了一种应用在光通信波段（1350～1750nm）范围内的亚波长光栅宽光谱消色差1／4相位延迟器，相位延迟量控制在90°2°衍射效率在80％以上。并对该光栅结构的工艺容差进行了分析，分析结果表明，所设计的光栅结构相位延迟量在合理范围内，符合工业生产相位延迟器的要求。Through the study of subwavelength grating phase characteristics, a broadband achromatic 1/4 phase retarder of subwavelength grating is designed, which bases on the method of rigorous coupled wave theory and genetic algorithm, with the wavelength range（1350-1750nm）applied in optical communica- tion. Its phase retardation can be controlled at 90°±2°, and the diffraction efficiency is above 80%. The manufacture tolerance analysis of the gratings structure shows that the phase retardation of the designed grating is in a reasonable range, which is consistent with the requirement of the phase retarder in the man- ufactural production.

关 键 词：相位延迟器 亚波长光栅 严格耦合波 遗传算法 衍射 

分 类 号：O436.1[机械工程—光学工程]