POLARIZATION CHARACTERISTICS OF VISIBLE VCSELS

Vertical cavity surface emitting lasers (VCSELs) based on InGaP lase i n the visible close to 650 nm. The polarisation characteristics of the se devices are unlike other VCSELs in that they are stable and reprodu cible and show no switching with increased current. We describe the po larisation characteristics for such devices where the structures were grown on different orientation wafers. We show that polarisation selec tivity increases directly with the degree of spontaneous ordering in t he InGaP quantum wells, but not with the wafer offset angle.