Wavefront sensing is a widely used non-interferometric, single-shot, and quantitative technique providing the spatial-phase of a beam. The phase is obtained by integrating the measured wavefront gradient. Complex and random wavefields intrinsically contain a high density of singular phase structures (optical vortices) associated with non-conservative gradients making this integration step especially delicate. Here, using a high-resolution wavefront sensor, we demonstrate experimentally a systematic approach for achieving the complete and quantitative reconstruction of complex wavefronts. Based on Stokes' theorem, we propose an image segmentation algorithm to provide an accurate determination of the charge and location of optical vortices. This technique is expected to benefit to several fields requiring complex media characterization.
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21 June 2021
Research Article|
June 21 2021
Reference-less complex wavefields characterization with a high-resolution wavefront sensor
Tengfei Wu;
Tengfei Wu
1
Université de Paris, SPPIN–Saints-Pères Paris Institute for Neurosciences, CNRS
, 75006 Paris, France
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Pascal Berto;
Pascal Berto
2
Sorbonne Université, CNRS, INSERM, Institut de la Vision
, 17 Rue Moreau, 75012 Paris, France
3
Université de Paris
, 75006 Paris, France
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Marc Guillon
Marc Guillon
a)
1
Université de Paris, SPPIN–Saints-Pères Paris Institute for Neurosciences, CNRS
, 75006 Paris, France
4
Institut Universitaire de France (IUF)
, 75005 Paris, France
a)Author to whom correspondence should be addressed: marc.guillon@u-paris.fr
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a)Author to whom correspondence should be addressed: marc.guillon@u-paris.fr
Appl. Phys. Lett. 118, 251102 (2021)
Article history
Received:
March 11 2021
Accepted:
June 01 2021
Citation
Tengfei Wu, Pascal Berto, Marc Guillon; Reference-less complex wavefields characterization with a high-resolution wavefront sensor. Appl. Phys. Lett. 21 June 2021; 118 (25): 251102. https://doi.org/10.1063/5.0050036
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