Coupling efficiency between the fundamental modes of two different graded-index waveguides, which are fabricated in glass or lithium niobate, is calculated by numerical and variational methods. Analytical results are derived by the variational approach, which supplies a systematic method for studying the influence of modal coupling on the design of integrated optical components.
© 1992 Optical Society of America
Original Manuscript: October 24, 1991
Published: September 1, 1992
J. Liñares, G. C. Righini, and J. E. Alvarellos, "Modal coupling analysis for integrated optical components in glass and lithium niobate," Appl. Opt. 31, 5292-5298 (1992)