太赫兹波段反谐振光纤偏振分束器设计

Design of Anti-resonant Fiber Polarization Beam Splitter in Terahertz Band

偏振分束器是在光传感和集成光学等领域中非常重要的光学元器件,太赫兹波段被认为是未来大容量无线通信的载体。而双芯空芯反谐振光纤结构设计更加多变,对包层结构没有严格要求,能实现较高的性能以满足人们更多样化的需求,以双芯空芯反谐振光纤为基础设计适用于太赫兹波段的偏振分束器越来越值得深入研究。提出一种以环烯烃聚合物为基底材料的双芯空芯反谐振光纤,通过改变光纤结构参数进一步分析调整,并在此基础上进行了偏振分束器的设计和优化,其结构参数为:内包层管壁厚为90μm,内包层管外半径为335μm,外管内半径为2 000μm,外管外半径为2 500μm。最后得到长度为119 cm,消光比为-24.831 3 dB,带宽约为2.2μm的太赫兹波段偏振分束器。

Polarization beam splitter(PBS)is a very important optical component in the fields of optical sensing and integrated optics.Terahertz wave is considered as the carrier of large capacity wireless communication in the future.And the structure design of dual hollow core antiresonant fiber is more variable,there is no strict requirement for cladding structure,and it can achieve higher performance to meet the needs of people's more diversity.Therefore,the design of PBS based on dual hollowcore antiresonant fiber for terahertz band is more and more worthy of indepth study.A dual hollowcore antiresonance fiber based on cycloalkene polymer is proposed,further analysis and adjustment are carried out by changing the structural parameters of the optical fiber,on this basis,the.PBS is designed and optimized.The structural parameters are as follows,the thickness of the inner cladding tube is 90μm,the outer radius of the inner cladding tube is 335μm,the inner radius of the outer tube is 2000μm,and the outer radius of the outer tube is 2500μm.And a PBS with the length of 119 cm,the ER of24.8313 dB and the bandwidth of about 2.2μm is obtained.