Phase singularity reduction in speckle interferometry by tailoring the spatial coherence of light

Mantel K, Barakat I, Nercissian V, Harder I, Rothau S (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Applied Optics Optical Society of America

Book Volume: 60

Pages Range: 7043-7053

Journal Issue: 23

DOI: 10.1364/AO.432090

Abstract

Reducing the number of phase singularities in speckle interferometry by physical means increases the quality of the phase deconvolution and enhances the separability of fringe systems, especially for highly dynamic fringe systems. The reduction is achieved by tailoring the spatial coherence of the light source at the entrance of the interferometer. The reduction mechanism is non-intuitive and rests on a change of size and of position of the speckle patterns as a result of the spatially shaped coherence. After demonstrating the amount of reduction that may be achieved, the reduction mechanism is explained theoretically and via simulations, and it is vindicated in an experiment using a Michelson-Mach-Zehnder interferometer hybrid.

Authors with CRIS profile

Ismail Barakat Institut für Optik, Information und Photonik Vanusch Nercissian Lehrstuhl für Experimentalphysik (Optik)

Related research project(s)

Reduktion von Phasensingularitäten zur Vermeidung von Unwrapping-Problemen bei der Auswertung von Speckle-Shearing-Interferogrammen April 1, 2011 - April 30, 2013

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE)

How to cite

APA:

Mantel, K., Barakat, I., Nercissian, V., Harder, I., & Rothau, S. (2021). Phase singularity reduction in speckle interferometry by tailoring the spatial coherence of light. Applied Optics, 60(23), 7043-7053. https://dx.doi.org/10.1364/AO.432090

MLA:

Mantel, K., et al. "Phase singularity reduction in speckle interferometry by tailoring the spatial coherence of light." Applied Optics 60.23 (2021): 7043-7053.

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