The coupling between two single-mode optical fibers that are abruptly terminated and are facing each other is investigated analytically by means of a coupled system of integral equations. The electromagnetic fields are described by using mixed-spectrum eigenwave representations inside the waveguides, and Fourier integrals are utilized to describe the field between the two guides. Weak guidance conditions on the fiber guides are assumed to facilitate the formulation of the corresponding boundary-value problem. Numerical results are presented for several coupling geometries, and misalignment and reflection-loss phenomena are also investigated for cases when the two fiber terminal planes are parallel to each other.
© 1988 Optical Society of America
Original Manuscript: January 13, 1988
Manuscript Accepted: April 12, 1988
Published: August 1, 1988
C. N. Capsalis, N. K. Uzunoglu, and I. G. Tigelis, "Coupling between two abruptly terminated single-mode optical fibers," J. Opt. Soc. Am. B 5, 1624-1630 (1988)