Title :
Vector normal modes on two-core optical fibers. II. The modal cutoffs
Author :
Chang, Chih-Sheng ; Chang, Hung-Chun
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
7/1/1997 12:00:00 AM
Abstract :
For pt.I see ibid., vol.15, no.7, p.1213-24 (1997). A vector theory based on generalization of the circular harmonics expansion method combined with the finite-element method is formulated to determine cutoff values for higher-order normal modes on the two-core fiber with radially inhomogeneous core index profiles. The method is developed under the transverse magnetic field formulation in order to avoid the spurious solutions. Numerical examples are given for the two-identical-core cases with power-law core index profiles
Keywords :
finite element analysis; optical fibre theory; vectors; circular harmonics expansion method; cutoff values; finite-element method; higher-order normal modes; modal cutoffs; power-law core index profiles; radially inhomogeneous core index profiles; transverse magnetic field formulation; two-core optical fibers; two-identical-core cases; vector normal modes; vector theory; Laplace equations; Magnetic cores; Magnetic fields; Optical fiber couplers; Optical fiber polarization; Optical fiber theory; Optical fibers; Optical waveguide theory; Optical waveguides; Propagation constant;
Journal_Title :
Lightwave Technology, Journal of
