遗传算法精确调谐的双通道光子晶体滤波器  

Dual-Channel Photonic Crystal Filters Precisely Tuned by Genetic Algorithms

作　　者：王海燕[1] 张明达[1] 费宏明[1] 曹斌照[1] 刘欣[2] 杨毅彪 Wang Haiyan;Zhang Mingda;Fei Hongming;Cao Binzhao;Liu Xin;Yang Yibiao(College of Physics,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;College of Electronic Information and Optical Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China)

机构地区：[1]太原理工大学物理学院,山西太原030024 [2]太原理工大学电子信息与光学工程学院,山西太原030024 [3]太原理工大学新型传感器与智能控制教育部重点实验室,山西太原030024

出　　处：《光学学报》2024年第11期196-204,共9页Acta Optica Sinica

基　　金：国家自然科学基金(11704275,62175178,U22A20258);国家自然科学基金青年科学基金(11904255)。

摘　　要：针对多通道一维光子晶体滤波器不易精确调谐的问题,设计了一种以BaTiO_(3)材料为缺陷层的光子晶体双通道滤波器,通过分别改变两层BaTiO_(3)的外置电压来调节材料的折射率,从而实现双通道频率精确调谐,并引入遗传算法提高调谐效率。模拟结果表明:遗传算法在保证透射峰的透射率大于78%的条件下,可以在400代左右的计算进程中给出符合滤波目标的调谐电压组合;利用传输矩阵计算得出的分布曲面与拟合调谐函数对遗传算法给出的电压数据进行验证,证明了遗传算法的准确性与高效性。所设计的滤波器也可通过调节空气层厚度,实现双通道在(S,L)、(E,C)和(C,L)等波段的跨越式调谐。遗传算法的引入使得所设计模型易于实现调谐程序的自动化,可为微纳米滤波器的设计与调谐应用提供一定的参考。Objective Photonic crystal filters can greatly increase the transmission capacity of optical communication systems,which is a research hotspot for optical wavelength division multiplexing technology.Tunable optical filters are key components in optical wavelength division multiplexing systems.A monotonic functional relationship can easily be formed between the transmission peak wavelength of a single channel filter and tuning parameters to help achieve precise tuning.However,the information capacity of this filter is limited.The coupling relationship between dual-channel or even multi-channel filtering structures and transmission peak wavelength is complex.The overall translation of multi-channel transmission peaks is mainly focused on current research and lacks discussion on precise tuning.We design a tunable dual-channel filter based on BaTiO3(BTO)defect layers and introduce a genetic algorithm to achieve precise tuning of dual channels.This onedimensional photonic crystal filter changes the refractive index of BTO by altering applied voltages,thereby achieving separate tuning of dual transmission peak positions.Purposeful genetic algorithms can both automatically find peaks and ensure transmissivity,relying on computer computing power to realize automatic tuning of filtering wavelengths.Methods By adopting the transfer matrix theory,transmission spectra of the filter are obtained,and surface functions of two transmission peaks with the variation of two voltages are fitted.By combining surface projection with surface functions,precise tuning of the positions of two transmission peaks can be achieved.Meanwhile,a genetic algorithm is also introduced to achieve automatic tuning.By employing an algorithm framework based on purposes,the program can automatically find voltage combinations that match target peaks,thus avoiding manual involvement in analyzing surfaces and functions.Additionally,the tuning process can be simplified,and efficiency can be improved with the help of computing power.Results and Discussions S

关 键 词：光学设计 滤波器 遗传算法 精准调谐 光子晶体 传输矩阵 

分 类 号：O43[机械工程—光学工程]