Abstract
Efficiency and mode control are important in the proper design of coupled grating-surface-emitting diodes. In these devices, radiation-emission properties depend on the injection current of the different sections, phase effects from length variations, grating phase effects, and the boundary conditions of the particular design. We model an array of grating-surface-emitting diodes coupled either as a linear array or in a ring configuration. A realistic model incorporating power saturation, saturable losses, and saturable dispersion effects is established. Optimization of operation by injection-current control and phase modulation is studied. Modeling of the general (nonsymmetric) ring geometry is more complicated than the corresponding linear array because the number of unknowns is four instead of two. We show an approach that reduces the number of general ring unknowns to two.
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