Open AccessFlat-top laser beams over an extended range
Author(s) -
Andra Naresh Kumar Reddy,
Vishwa Pal,
Simon Mahler,
Asher A. Friesem,
Nir Davidson
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1410/1/012126
Subject(s) - optics , laser , range (aeronautics) , intensity (physics) , invariant (physics) , laser beams , free space , focus (optics) , beam (structure) , physics , laser beam quality , materials science , composite material , mathematical physics
Designs based on single diffractive-optical-elements for obtaining flat-top laser intensity distributions that remain constant over a long range during free-space propagation are presented. Flat-top beams with different orders n exhibit a different range of propagation. For various working distances z, the resulting flat-top beam yields a different depth of focus. By controlling spectral properties of laser distributions, it is possible to maintain invariant flat-top intensity distributions for relatively long propagation distances.