摘要
设计了一种具有色散平坦特性的双模PCF（光子晶体光纤）,采用全矢量FEM（有限元法）计算了光纤的模式及色散特性,分析了光纤结构对色散平坦性的影响。结果表明,当PCF的孔间距Λ=10μm,相对孔径d1/Λ=0.55、d2/Λ=0.65和d3/Λ=0.75时,基模和二阶模的限制损耗均小于1dB/m,两种模式的有效折射率差值Δneff〉10-3,实现了稳定的双模传输。在C波段,色散斜率介于-0.012 36-0.321 91ps/（nm2·km）之间,波长1 550nm处,基模和二阶模的色散斜率分别为0.093 80和0.038 97ps/（nm2·km）,实现了C波段的平坦色散。
In this paper, a new type of double-mode photonic crystal fiber with flattened-dispersion is designed. The transmis- sion and dispersion properties are simulated by Finite Element Method （FEM）. The impacts of the parameters of the PCF on the dispersion properties are analyzed. The results show that the double-mode PCF can gain stable transmission of the two modes when the structural parameters of PCF are A = 10μm, dμA = 0.55, dμA = 0.65, dμA = 0.75. The confinement loss of each mode is less than 1 dB/m, and the effective refractive index difference is larger than 10^-3. The dispersion slope values ranges from -0. 012 36 ps/（nm2 · km） to 0. 321 91 ps/（nm2 · kin） in the C band. The dispersion slope value in 1 550 nm of each mode are 0. 093 80 ps/（nm2 · kin） ,0. 038 97 ps/（nm2 · km） ,which means that the PCF can achieve dispersion-flattened transmission in the wavelength range of communication.
出处
《光通信研究》
北大核心
2016年第6期36-38,67,共4页
Study on Optical Communications
基金
国家自然科学基金资助项目(6127506761571237)
关键词
少模光纤
光子晶体光纤
有限元法
色散
few-mode fiber
photonic crystal fiber
finite element method
dispersion
