Abstract:

A two-dimensional rate equation model of vertical-cavity surface-emitting lasers (VCSELs) was built up based on the multimode rate equations. The influences of the shape and position of injection contact electrode and intensity of the injection current on the transverse-mode characteristics of VCSELs were investigated by numerical simulation, and the azimuthally non-uniformity of the injection current was taken into account, the dependency of laser modes on different kinds of spatially periodical current was investigated. Numerical results show showed that the intensity and profile of injection current play played important roles in determining the mode behaviors of VCSELs.

Key words: vertical-cavity surface-emitting lasers, modes competition, rate equation