Open AccessOAM interferometry: the detection of the rotational Doppler shift
Author(s) -
Richard Neo,
Sergio Leon-Saval,
Joss Bland-Hawthorn,
Gabriel MolinaTerriza
Publication year - 2017
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.25.021159
Subject(s) - optics , doppler effect , physics , interferometry , rotation (mathematics) , observer (physics) , computer science , quantum mechanics , astronomy , artificial intelligence
In this paper, we propose a new type of rotational Doppler shift measurement based on the OAM of light which is capable of measuring the rotation of a point source in the plane orthogonal to the observer line of sight. By analysing the correlations between OAM states of light emitted by rotating sources, the rotational Doppler shift, and hence the rate of rotation, can be measured. We demonstrate that an OAM interferometer capable of extracting the rotational Doppler shift from OAM correlations can be constructed from a standard OAM modesorter combined with a phase filter.