ALTERNATELY PERPENDICULAR POLARIZATION IN CHEQUER-PATTERN MATRIX ARRAYS OF VCSELS

An 8 x 8 chequered-pattern matrix array of vertical cavity surface emi tting lasers (VCSELs) with alternately perpendicular polarisation was monolithically fabricated. It consisted of 64 VCSELs with 6 x 41 mu m( 2) rectangular post structures placed alternately perpendicular to eac h other, that is, they were placed alternately parallel and orthogonal to the [110] direction. The polarisation angle deviations of the two directions were only 4.1 degrees and 2.9 degrees, respectively. These results indicate that an arbitrarily-regulated-polarisation monolithic laser array can be obtained regardless of the wafer orientation.