The variations of the refractive index and the wavelength along the axis of an integrated-optics lens are taken into account in an improved set of equations of the beam-propagation method. It is shown that this implementation removes an inconsistency between the predictions of the standard beam-propagation method and those of geometrical optics.
© 1992 Optical Society of America
Original Manuscript: November 26, 1991
Published: April 1, 1992
A. Di Sebastiano and G. Pozzi, "Improved beam-propagation method equations for the analysis of integrated-optics lenses," Opt. Lett. 17, 472-474 (1992)