Abstract

The undesired side lobes in the far field emission of a linear array of phase coupled lasers can be reduced by using a single phase correcting mirror outside the laser array cavity [1]. Even in that case the beam has strong asymmetry and astigmatism, that can be corrected by an off-axis spherical mirror We show the beam obtained experimentally with this kind of correction The global optical set-up consists in three reflective optical elements producing a lossless transformation of the field distribution from a periodic repetition of small highly divergent sources to a quasi-gaussian symmetric beam.

© 1996 IEEE