Marco Potenza and Mirko Siano (University of Milano)

Wavefront characterization of partially coherent light
When Dec 13, 2016 from 02:00 PM to 03:00 PM
  • Special Seminar
  • Colloquium
Where SH, Seminar room
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Wavefront characterization is of fundamental importance in many applications and research areas, e.g coherent and incoherent imaging, phase-sensitive techniques, optics metrology, beam diagnostics. In the first part of this seminar we show how to probe wavefront phase correlations (coherence properties) of radiation beams in third and fourth-generation light sources with the Heterodyne Near Field Speckle method. Experimental results obtained with undulator radiation at ESRF, SASE FEL at SPARC_LAB and synchrotron radiation at ALBA are provided. We also introduce the novel Asymmetric Lateral Coherence approach, which exploits many asymmetric Young’s interferometers to retrieve spatial features of broadband sources. In the second part of this seminar we address the problem of wavefront phase sensing and reconstruction. We focus on vortex beams, i.e. light carrying Orbital Angular Momentum, describing their generation and the current diagnostics to evidence the phase helicity.