CAJ | 학술논문

为了获得微结构光纤的平坦色散特性,设计了一种圆形排列的微结构光纤,其包层由周期分布的空气孔构成,通过有限元数值分析法对该微结构光纤基模的色散特性进行了数值仿真,研究了色散和纤芯圆孔尺寸以及波长的关系。结果表明：内外空气孔间距和直径对微结构光纤的色散曲线都有影响,但内包层大孔间距和第一圈小空气孔的直径对色散曲线的走向起决定作用。在内圈空气孔直径为3.1μm,其他空气孔直径为1.0μm,内圈空气孔中心间距为5μm,其他空气孔中心间距为4μm时,光纤在1.3μm波长的色散为19.5 ps/(nm·km),在1.6μm波长的色散为26.5 ps/(nm·km),在1.3~1.6μm波长范围内,其色散值变化范围为7 ps/(nm·km)。
위료획득미결구광섬적평탄색산특성,설계료일충원형배렬적미결구광섬,기포층유주기분포적공기공구성,통과유한원수치분석법대해미결구광섬기모적색산특성진행료수치방진,연구료색산화섬심원공척촌이급파장적관계。결과표명：내외공기공간거화직경대미결구광섬적색산곡선도유영향,단내포층대공간거화제일권소공기공적직경대색산곡선적주향기결정작용。재내권공기공직경위3.1μm,기타공기공직경위1.0μm,내권공기공중심간거위5μm,기타공기공중심간거위4μm시,광섬재1.3μm파장적색산위19.5 ps/(nm·km),재1.6μm파장적색산위26.5 ps/(nm·km),재1.3~1.6μm파장범위내,기색산치변화범위위7 ps/(nm·km)。
In order to analyze the flat dispersion properties of microstructure fibers,a microstructure fiber with a circular ar-rangement is designed,the cladding of which consists of periodically distributed air holes.Its dispersion property is numerically simulated by using the finite element numerical analysis method and the dependence of dispersion on the size of the circular holes of the core and wavelength is investigated.The results show that the spaces between the inner and outer air holes and di-ameter both affect the dispersion curve,but the space between the big holes in the inner cladding and the diameter of the first circle of small air holes play a decisive role in the curve trend.When the diameter of the inner air holes is 3.1μm and those of the others 10μm,and the space from center to center of the inner air holes is 5μm and those of the others 4μm,the dispersion is 19.5 ps/(nm·km)at the wavelength of 1.3μm and 26.5 ps/(nm·km)at the wavelength of 1.6μm,and the dispersion varies in the range of 7 ps/(nm·km)in the wavelength range of 1 .3~1 .6μm.