title: Confocal unstable-resonator semiconductor laser.
abstract: GaAs/GaAlAs heterostructure lasers with a monolithic confocal unstable resonator were demonstrated. The curved mirrors satisfying the confocal condition were fabricated by etching. Close to threshold, the lasers operate in a single lateral mode with a nearly collimated output beam. A single-lobe far-field intensity distribution as narrow as 1.9 degrees full width at half maximum was measured.
authors.forename: J
authors.initials: J
authors.lastname: Salzman
authors.forename: R
authors.initials: R
authors.lastname: Lang
authors.forename: A
authors.initials: A
authors.lastname: Larson
authors.forename: A
authors.initials: A
authors.lastname: Yariv