Robust multifilament arrays in air by Dammann grating
D. V. Pushkarev, A. Larkin, E. Mitina, N. A. Zhidovtsev, D. S. Uryupina, R. V. Volkov, С. В. Карпеев, Svetlana N. Khonina, Alexander A. Karabutov, Yu. É. Geints, O.G. Kosareva, A. B. Savel’ev
Abstract
We compare transverse structure evolution and energy deposition into the medium within focused multifilament arrays created using two different types of diffraction optical elements (DOEs): TEM 11 phase plate and a Dammann grating. We show that the employment of the Dammann grating provides a robust way to create regular multifilament arrays, which is far less dependent on laser beam quality than one using the phase plate.
Topics & Concepts
GratingOpticsMaterials scienceDiffraction gratingDiffractionLaser beamsPhase (matter)LaserBeam (structure)Laser beam qualityTransverse planePhysicsQuantum mechanicsStructural engineeringEngineeringOptical Coatings and GratingsPhotorefractive and Nonlinear OpticsLaser-Matter Interactions and Applications