Index distribution of optical waveguides from their mode profile

Abstract

The refractive-index profile is readily calculated from the observed fundamental mode pattern using the scalar-wave equation. Index distributions of diffused Ti: LiNbO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> waveguides were measured and are consistent with model calculations.