【摘要】 本文求得了单模双包层光纤之间耦合系数精确的解析表达式.计算了上升内包层、匹配包层和凹陷内包层光纤耦合系数随归一化频率V的关系曲线.也给出了不同V值的耦合系数随归一化距离(D/α)的关系曲线.该公式不但能够计算x偏振模的耦合系数,而且也能计算y偏振模的耦合系数.它可用于分析折射率差较大的光纤之间能量耦合以及耦合器的偏振特性.更多还原

【Abstract】 An accurate analytic expression of coupling coefficient between two parallel doubly cladding single mode fibers is given in this paper.The coupling coefficients as a function of normalized frequency parameter V are calculated for fibers with raised, matched, and depressed inner cladding indices. The coupling coefficients as a function of normalized distance D/a are also given with different V. The formula can be used to compute both the coupling coefficients for both x-polarized modes and the coupling of y-polarized modes further. It can also be used to analyze the coupling between two fibers with their large refractive-index difference, as well as polarization characteristics of optical fiber couplers.更多还原