CAJ | 학술논문

PCF(光子晶体光纤)在实际拉制过程中包层会形成间隙孔。文章提出一种类蜂巢晶格结构的光纤，利用全矢量 PWEM (平面波展开法)分析了该结构的圆形和正六边形纤芯的带隙特性，发现纤芯形状对带隙影响作用比较小，验证了 PBG(光子带隙)主要是由包层有序排列的空气孔而形成的。计算分析了包层间隙孔直径 d in t 、包层孔节距Λ和包层空气填充率f 对带隙特性的影响。通过模拟计算发现，在一定 d in t 范围内，增大 f 以及减小Λ，带隙宽度均会增大，并且带隙向高频方向移动。采用实际拉制的光纤进行模场面积计算和 PBG 分布的理论研究，发现该结构光纤的光主要集中在基模传输，同时在可见光波范围内存在 PBG。
PCF(광자정체광섬)재실제랍제과정중포층회형성간극공。문장제출일충류봉소정격결구적광섬，이용전시량 PWEM (평면파전개법)분석료해결구적원형화정륙변형섬심적대극특성，발현섬심형상대대극영향작용비교소，험증료 PBG(광자대극)주요시유포층유서배렬적공기공이형성적。계산분석료포층간극공직경 d in t 、포층공절거Λ화포층공기전충솔f 대대극특성적영향。통과모의계산발현，재일정 d in t 범위내，증대 f 이급감소Λ，대극관도균회증대，병차대극향고빈방향이동。채용실제랍제적광섬진행모장면적계산화 PBG 분포적이론연구，발현해결구광섬적광주요집중재기모전수，동시재가견광파범위내존재 PBG。
Interstitial holes are usually formed in the cladding of Photonic Crystal Fibers (PCF)in the actual drawing process. This paper presents an optical fiber in honeycomb-like lattice structure.Using the full-vector Plane Wave Expansion (PWE) method,it analyzes the bandgap properties of its circular and hexagonal cores,finds that the impacts of the core shape on the bandgap is relatively small and verifies that the Photonic Band Gap (PBG)is formed mainly due to the orderly arranged air holes in the cladding.Furthermore,it calculates and analyzes the effects of the interstitial hole diameter d in t ,hole pitchΛ and air filling ratio f on the bandgap properties.The analog computation results indicate that in certain scope of d in t ,the bandgap width increases with both increasing f and reducingΛ ,and the bandgap shifts towards the high frequency side.Finally,from the mode field area computation of the actually drawn fibers and the theoretical study of PBG distribution,it finds that the light in fibers in this structure mainly focuses on basemode transmission and there exist PBGs in the range of visible light waves.