计算机技术与发展
計算機技術與髮展
계산궤기술여발전
COMPUTER TECHNOLOGY AND DEVELOPMENT
2015年
2期
230-233
,共4页
太赫兹%光子晶体光纤%低损耗%近零平坦色散
太赫玆%光子晶體光纖%低損耗%近零平坦色散
태혁자%광자정체광섬%저손모%근령평탄색산
TeraHertz ( THz)%Photonic Crystal Fiber ( PCF)%low loss%nearly zero and flat dispersion
近几年,太赫兹( THz)波及其相关技术的研究逐渐成为热点,因此寻找一种低损耗、近零平坦色散的THz波导成为研究的目标。文中运用全矢量有限元法,并利用COMSOL软件设计了一种新型THz波光子晶体光纤,其包层的孔间距恒定、各层孔直径变化；对所设计的新型THz光子晶体光纤的损耗、色散特性进行数值计算与优化。计算结果表明,这种THz光子晶体光纤工作在130~140μm(2.1~2.3 THz)之间时,损耗值低于0.06 dB/km,色散值在0.2 ps/( nm·km)到0.27 ps/(nm·km)之间,色散斜率为0.6 ps/(nm·km2),可以实现长距离、高性能THz波传输。
近幾年,太赫玆( THz)波及其相關技術的研究逐漸成為熱點,因此尋找一種低損耗、近零平坦色散的THz波導成為研究的目標。文中運用全矢量有限元法,併利用COMSOL軟件設計瞭一種新型THz波光子晶體光纖,其包層的孔間距恆定、各層孔直徑變化；對所設計的新型THz光子晶體光纖的損耗、色散特性進行數值計算與優化。計算結果錶明,這種THz光子晶體光纖工作在130~140μm(2.1~2.3 THz)之間時,損耗值低于0.06 dB/km,色散值在0.2 ps/( nm·km)到0.27 ps/(nm·km)之間,色散斜率為0.6 ps/(nm·km2),可以實現長距離、高性能THz波傳輸。
근궤년,태혁자( THz)파급기상관기술적연구축점성위열점,인차심조일충저손모、근령평탄색산적THz파도성위연구적목표。문중운용전시량유한원법,병이용COMSOL연건설계료일충신형THz파광자정체광섬,기포층적공간거항정、각층공직경변화；대소설계적신형THz광자정체광섬적손모、색산특성진행수치계산여우화。계산결과표명,저충THz광자정체광섬공작재130~140μm(2.1~2.3 THz)지간시,손모치저우0.06 dB/km,색산치재0.2 ps/( nm·km)도0.27 ps/(nm·km)지간,색산사솔위0.6 ps/(nm·km2),가이실현장거리、고성능THz파전수。
In recent years,THz and its related technologies has become a hot research,so a kind of THz waveguide with low loss,nearly zero and flat dispersion attracts wide attention and research interest. A new type of THz photonic crystal fiber is designed with full vector Finite Element Method ( FEM) ,in which the hole spacing of its package layer is constant,hole diameter of each layer is changing. Its loss and dispersion characteristics is calculated and optimized. The results show that the loss value is lower than 0. 06 dB/km,the dispersion valueisbetween0.2ps/(nm·km)to0.27ps/(nm·km),thedispersionslopeis0.6ps/(nm·km2)whenthiskindofTHzphoton-ic crystal fiber works between 130 μm and 140 μm(2. 1 THz to 2. 3 THz),the PCF can transmit with high performance and long dis-tance.
