title: Beam-focus shaping by use of programmable phase-only filters: application to an ultralong focal line.
abstract: We have developed a high-resolution programmable adaptive-optic device based on an optically addressed liquid-crystal electro-optic valve controlled by an achromatic three-wave lateral shearing interferometer. We apply this phase-only filter and loop to shape the far-field pattern of laser beams. As a first application, we theoretically compute and experimentally verify the focus along a line longer than tens of Rayleigh ranges.
authors.forename: B
authors.initials: B
authors.lastname: Wattellier
authors.forename: C
authors.initials: C
authors.lastname: Sauteret
authors.forename: J-C
authors.initials: JC
authors.lastname: Chanteloup
authors.forename: A
authors.initials: A
authors.lastname: Migus