OAM interferometry

the detection of the rotational Doppler shift

Richard Neo*, Sergio Leon-Saval, Joss Bland-Hawthorn, Gabriel Molina-Terriza

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)21159-21170
Number of pages12
JournalOptics Express
Issue number18
Publication statusPublished - 4 Sep 2017

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    Neo, R., Leon-Saval, S., Bland-Hawthorn, J., & Molina-Terriza, G. (2017). OAM interferometry: the detection of the rotational Doppler shift. Optics Express, 25(18), 21159-21170. https://doi.org/10.1364/OE.25.021159