title: Coherent addition of adjacent lasers by forked eigenstate operation.
abstract: Forked laser eigenstates are shown to provide a powerful tool both to phase lock spatially separated laser oscillators and to add their powers coherently into a TEM(00) output beam. Coherent addition of the powers extracted from two fiber-coupled diode-pumped Nd:YAG channels is theoretically and experimentally demonstrated. Pure TEM(00) oscillation is obtained with a 20% optical-to-optical conversion efficiency. The coherence of the two-propagation-axis laser is proved, and single-frequency operation is demonstrated. The scalability of the scheme is discussed.
authors.forename: M
authors.initials: M
authors.lastname: Brunel
authors.forename: A
authors.initials: A
authors.lastname: Le Floch
authors.forename: F
authors.initials: F
authors.lastname: Bretenaker
authors.forename: J
authors.initials: J
authors.lastname: Marty
authors.forename: E
authors.initials: E
authors.lastname: Molva