title: Two-dimensional pseudo-random optical phased array based on tandem optical injection locking of vertical cavity surface emitting lasers.
abstract: We demonstrate, both theoretically and experimentally, a pseudo-random, two-dimensional optical phased array (OPA) concept based on tandem injection locking of 64-element vertical cavity surface emitting laser (VCSEL) arrays. A low cavity-Q VCSEL design resulted in an injection locking optical power of less than 1 μW per VCSEL, providing large OPA scaling potential. Tandem injection locking of two VCSEL arrays resulted in measured controllable optical phase change of 0-1.6π. A high quality beam formed with suppressed grating lobes due to the pseudo-random array design was demonstrated with performance close to simulated results. A preliminary 2.2° x 1.2° beam steering example using the tandem arrays was also demonstrated.
authors.forename: Keyvan
authors.initials: K
authors.lastname: Sayyah
authors.forename: Oleg
authors.initials: O
authors.lastname: Efimov
authors.forename: Pamela
authors.initials: P
authors.lastname: Patterson
authors.forename: James
authors.initials: J
authors.lastname: Schaffner
authors.forename: Carson
authors.initials: C
authors.lastname: White
authors.forename: Jean-Francois
authors.initials: JF
authors.lastname: Seurin
authors.forename: Guoyang
authors.initials: G
authors.lastname: Xu
authors.forename: Alexander
authors.initials: A
authors.lastname: Miglo