Beam-focus shaping by use of programmable phase-only filters: application to an ultralong focal line.
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.
Wattellier
B
B
Sauteret
C
C
Chanteloup
J-C
JC
Migus
A
A