Open AccessIn situ real-time beam monitoring with dielectric meta-holograms
Author(s) -
Yoav Blau,
Michal Eitan,
В. Н. Егоров,
Amir Boag,
Yael Hanein,
Jacob Scheuer
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.028469
Subject(s) - optics , holography , beam (structure) , gaussian beam , dielectric , materials science , laser beam quality , laser , physics , laser beams , optoelectronics
A novel approach for performing in situ and real-time beam monitoring, based on dielectric meta-hologram, is proposed and demonstrated. The ultrathin dielectric meta-hologram projects a portion of the beam power onto a screen to provide a visual indicator of the spatial intensity distribution of a Gaussian laser beam, as well as its waist position along the optical axis. Specifically, we demonstrate simple monitoring of the spot size, astigmatism, lateral position, and position along the optical axis of the beam. Good agreement is found with both theory and conventional knife-edge beam profiler measurements. This in situ beam monitoring approach could provide a highly useful tool for numerous optical applications.