Coherent addition of AlGaAs lasers using microlenses and diffractive coupling

James R. Leger, Miles L. Scott, Wilfrid B. Veldkamp

Research output: Contribution to journalArticlepeer-review

154 Scopus citations


A near single-lobed far-field pattern was obtained from coherent operation of a nonevanescently coupled AlGaAs laser diode array. A diffractive microlens array collimated the individual beams to approximate a plane wave, and diffractive coupling from an external cavity mirror provided mutual coherence. A diffraction-limited far-field pattern was observed with 82% of the power contained in the central lobe. The method is directly applicable to two-dimensional laser arrays and can be implemented as a single thin optical element.

Original languageEnglish (US)
Pages (from-to)1771-1773
Number of pages3
JournalApplied Physics Letters
Issue number21
StatePublished - 1988

Bibliographical note

Copyright 2007 Elsevier B.V., All rights reserved.


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