Perturbation theory is used in order to calculate the ef fective-index distribution in dielectric waveguides that exhibit slow lateral variations. As an example, the method is employed to find the optical modes in diode lasers with lateral spatial variations in thickness. Very good agreement with experiment is obtained for the case of GaAlAs double heterostructure lasers with a crescent-shaped waveguide.
|Number of pages||4|
|Journal||IEEE Journal of Quantum Electronics|
|State||Published - Nov 1983|