Optimum Design of GaAs/AlGaAs Surface-Relief VCSELs with Single-Mode Operation at 808 nm

This paper reports an opto-electro-thermal analysis of VCSEL structures with a surface-relief filter and different aperture diameters. 808-nm GaAs/AlGaAs VCSELs with different aperture diameters and different surface-relief filter diameters are studied and the LI curves, the optical spectra, and the temperature peaks of the devices are obtained. Also, the impact of utilizing different oxide apertures on the temperature peak is shown. The effect of the surface-relief filter diameter on VCSEL’s performance is also investigated and the optimal filter diameter is obtained for maintaining single-mode operation while producing as much output power as possible.