激光与光电子学进展, 2017, 54 (1): 011301, 网络出版: 2017-01-17
光子晶体偏振分束器的设计与性能分析 下载: 688次
Design and Performance Analysis of Photonic Crystal Polarizing Beam Splitter
集成光学 定向耦合 光子晶体 偏振分束器 时域有限差分法 integrated optics directional coupling photonic crystal polarizing beam splitter finite-difference time-domain method
摘要
设计了一种基于定向耦合结构的光子晶体偏振分束器。该分束器由两个单模波导构成, 通过调节两个单模波导的宽度可以改变耦合长度。利用时域有限差分法进行仿真分析, 结果表明, 在波长1550 nm下TE和TM两种偏振模可以分束, 透射率都达到90%以上, 消光比分别达到22.4 dB和18.2 dB。该光子晶体偏振分束器的尺寸为25.8 μm×13 μm。
Abstract
A photonic crystal polarizing beam splitter based on directional coupling structure is proposed. The beam splitter consists of two single-mode waveguides. By adjusting the width of the two single-mode waveguides, the coupling length can be changed. The splitter is simulated and analyzed by using finite-difference time-domain method. The results show that at the wavelength of 1550 nm, both TE and TM polarizations achieve mode split. The transmissivities of TE and TM modes both exceed 90% and the extinction ratios reach 22.4 dB and 18.2 dB respectively. The size of the device is only 25.8 μm×13 μm.
张信祥, 陈鹤鸣. 光子晶体偏振分束器的设计与性能分析[J]. 激光与光电子学进展, 2017, 54(1): 011301. Zhang Xinxiang, Chen Heming. Design and Performance Analysis of Photonic Crystal Polarizing Beam Splitter[J]. Laser & Optoelectronics Progress, 2017, 54(1): 011301.