Open AccessReal-time OAM cross-correlator based on a single-pixel detector HOBBIT system
Author(s) -
Kun Dai,
J. Keith Miller,
Eric Johnson
Publication year - 2020
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.413143
Subject(s) - optics , detector , physics , modulation (music) , pixel , spatial light modulator , phase modulation , transient (computer programming) , angular momentum , bessel function , main lobe , computer science , telecommunications , phase noise , acoustics , quantum mechanics , antenna (radio) , operating system
The creation and detection of spatial modes of light with transient orbital angular momentum (OAM) properties is of critical importance in a number of applications in sensing and light matter interactions. Most methods are limited in their frequency response as a result of their modulation techniques. In this paper, a new method is introduced for the coherent detection of transient properties of OAM using a single pixel detector system for the creation of an OAM spectrogram. This technique is based on the ideas utilized in acousto-optic based optical correlators with log-polar optical elements for the creation and detection of higher order bessel beams integrated in time (HOBBIT) at MHz data rates. Results are provided for beams with time varying OAM, coherent combinations, and transient scattering by phase objects.