Influences of N-DBR and Double Oxide-confined Regions on the Characteristics of Electrical, Optical and Thermal Fields in VCSEL
N-DBR和双氧化限制层对VCSEL电、光、热特性的影响

In this paper,a direct coupling theoretical model in quasi-three-dimension for the gain-wave guide Vertical-Cavity Surface-Emitting Laser (VCSEL) has been created.With the finite-difference method,self-consistent solutions for the injected current density, carrier concentration,optical field and thermal conduction equations are realized to study the characteristics of electrical,optical and thermal fields distribution in VCSEL.A VCSEL with double oxide-confined regions is introduced.The influences of N-DBR layers and double oxide-confined regions on the characteristics of VCSEL are analyzed contrastively.The calculation results show that if N-DBR layers are not considered,there must be some errors to the practical VCSEL.The results also indicate that the structure of double oxide-confined regions in VCSEL has been improved greatly the characteristics of lasers,and it provides a method of reducing threshold current and controlling high-order modes.