Analytical solutions of optical waveguide of double cladding that the refractive index of core is lower than the refractive index of inner cladding were studied,and the expressions of electromagnetic field and modal characteristic equations are derived.
对芯层折射率小于内包层折射率的双包层光波导进行了解析求解 ,得到了模式场精确解及模式特征方程 。
The solutions of guided modes and modal characteristic equation are derived.
对圆芯和内外包层都为手征介质构成的双包层手征光纤 (W型 )进行了解析求解 ,导出了模式场解及模式特征方程 ,然后用数值计算的方法研究了手征参数对模式的色散曲线和截止频率的影响 ,结果发现在双包层光纤的纤芯中引入手征或在单包层光纤的包层中引入手征 ,都可以实现单模工作。
The modal fields distribution and modal characteristic equations are obtained.
对椭圆芯手征光纤进行了严格的求解，得到了模式场的解析解；推出了模式特征方程；并对基模的偶模和奇模特征方程进行数值求解；研究了手征参数对不同椭圆比下基模的色散曲线、双折射、模间色散等特性的影
This paper derives the motion property equation of the one-row and two-planets gears for Ravigneaux planetary transmission.
文中推导了拉维娜式行星齿轮变速器的单排双行星轮式齿轮机构的运动特性方程式。
