Coupled modes of anisotropic polarization maintaining fibers

摘要: Wave coupling between the fundamental vector modal fields of two identical, polarization-maintaining, weakly guiding fibers is analyzed. An improved coupled-mode theory used that also applies to anisotropic materials. Coupling coefficients are elements a matrix calculated and presented as functions relative tilt angle fiber principal axes. Exact analytical expressions for eigenvalues their associated eigenvectors given in terms this matrix, any angle. Symmetry relations found much simplify presentation eigenvectors. A weak-coupling approximation eigenvector expressions, which given, retains qualitative properties. >