ACCURATE 3-DIMENSIONAL MODAL SOLUTIONS FOR OPTICAL RESONATORS WITH PERIODIC LAYERED STRUCTURE BY USING THE FINITE-ELEMENT METHOD

Accurate vector finite element solutions for three-dimensional (3-D) a xisymmetric multilayered optical cavities are presented. Resonating wa velength and field profiles are shown for the fundamental and higher o rder modes for different types of optical cavities. The work has shown that for a narrow multilayered cylinder of diameter less than or equa l to 0.5 mu m, for miniature vertical cavity surface emitting lasers ( VCSEL), which is a popular class of laser showing favorable performanc e characteristics, the effect of waveguide dispersion is an important factor. This causes a blue shift of the output wavelength, requiring a n adjustment to the layer thickness in the system design, to achieve t he desired wavelength. The results of the simulation show close agreem ent; with features obtained through experimental investigations.