摘要
根据薄膜窄带滤光片在斜入射时的偏振特性,提出了基于遗传算法的斜入射薄膜窄带滤光片膜系优化设计方法.根据开发的程序,设计并制备了一组可用于18°倾斜入射的0.8纳米信道间隔的五腔薄膜窄带滤光片.该滤光片能有效地抑制斜入射时偏振光中心波长的分离现象,降低器件的偏振相关损耗,通过角度调谐能实现选择波长的改变.通过与针法设计的滤光片膜系相比,遗传算法得到的膜系具有更高的矩形度、更大的波长调谐范围以及更低的偏振相关损耗.实验结果表明其满足设计要求并有超过25纳米的波长调谐范围.
According to the polarization characteristics of the thin film narrowband filter,the stack of narrowband filter used in oblique incidence is provided based on the genetic arithmetic in this paper.A 100GHz five-cavity thin film filter used in 18° incidence is optimized based on the programme.The stack can eliminate the phenomenon of polarization light central wavelength separation used in oblique incidence and it has low polarization dependent loss.It can be used as an angle-tuned thin film filter for wavelength modulation.Compared with the thin film filter stack obtained by needle arithmetic design,it has higher rectangle degree,larger wavelength tunable range and less polarization dependent loss.The experimental results show it meets the demand of design and its tunable range is more than 25 nm.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2013年第2期181-185,共5页
Acta Photonica Sinica
基金
国家自然科学基金(No.61205062)
湖北省自然科学基金(No.2012FFB02701)
华中科技大学文华学院创新基金(No.J02005301)资助
关键词
薄膜
窄带滤光片
遗传算法
斜入射
优化设计
Thin film
Narrowband filter
Genetic arithmetic
Oblique incidence
Optimal design
