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Calculation for Coupling Coefficient of Concentric Elliptical Fibers

Wang Limeng Yan Runsheng (Quality Inspection and Test Centre, Shanghai Transmission Lines Research Institute, The Ministry of Electronics Industry, Shanghai 200437)  
According to the principle of coupling mode and the electromagnetic fields in fiber core and cladding with concentric ellipticity expressed by Mathieu functions, the analytical function formula is given in this paper for coupling coefficient of even mode in ground mode field under proper approximation conditions. The resluts of the eccentricity against coupling coefficient and the half major axis against coupling coefficient are obtained at cutoff frequency.
【CateGory Index】: TN253
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