Widefield quantitative phase imaging by
second-harmonic dispersion interferometry

Year: 2020

Authors: Brandi F., Wessel F.

Autors Affiliation: L Egant Solut LLC, POB 16475, Irvine, CA 92623 USA; CNR, Intense Laser Irradiat Lab, Ist Nazl Ott, Via Moruzzi 1, I-56124 Pisa, Italy.

Abstract: Widefield optical characterization of transparent samples is of great importance for gas flow and plasma diagnostics, for example, as well as label-free imaging of biological samples. An optically transparent medium, however, cannot be imaged by techniques based on intensity contrast imaging.
Very well-known qualitative phase-contrast imaging methodologies are routinely used to overcome this
limitation, and quantitative phase-imaging approaches have also been developed. Here we report the demonstration of, to the best of our knowledge, a novel widefield quantitative phase-imaging technique, based on fully common-path second-harmonic dispersion interferometry that is combined with pixel-by-pixel homodyne dual-channel polarization-dependent phase detection.
The device is tested in a harsh environment reaching sub-10 mrad harmonic phase dispersion sensitivity and a spatial resolution of several tens of microns with an optical configuration that is very stable and easy to implement. The time resolution of the demonstrated device is 600 ps, set by the
laser-pulse time duration.

Journal/Review: OPTICS LETTERS

Volume: 45 (15)      Pages from: 4304  to: 4307

More Information: U.S. Department of Energy (SC 0019789).
KeyWords: quantitative phase imaging, interferometery, generation
DOI: 10.1364/OL.395097

Citations: 2
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-27
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