Investigating Scaling Effects on The Static Characteristics of Long-Wavelength Vertical Cavity Lasers (VCSELs)

In this paper, the characteristics of longwavelength vertical-cavity surface-emitting laser (VCSEL) lasing at 1550 nm have been studied based on the influence of the oxide aperture radius. Using the oxide confined VCSEL model, we examine the static operations taking into account the carrier-noise, photon-noise and phase-noise including feedback of the external cavity. From the simulation, several important laser characteristics such as threshold gain, threshold current density and external quantum efficiency have been evaluated. Our results show that by scaling the oxide aperture radius, we are able to obtain an optimal oxide aperture radius in enhancing the VCSEL’s characteristics. Index Term-VCSEL, long-wavelength, InGaAsP, Quantum