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.
© 2002 Optical Society of America
B. Wattellier, C. Sauteret, J.-C. Chanteloup, and A. Migus, "Beam-focus shaping by use of programmable phase-only filters: application to an ultralong focal line," Opt. Lett. 27, 213-215 (2002)