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Conducting Hyperscanning Experiments with Functional Near-Infrared Spectroscopy
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Published on: January 19, 2019

Spectral coherence anomalies.

Luyu Wang1, Sergey A Ponomarenko, Zhizhang David Chen

  • 1Department of Electrical and Computer Engineering, Dalhousie University, Halifax, NS, Canada.

Optics Letters
|August 14, 2013
PubMed
Summary
This summary is machine-generated.

We found new spectral coherence anomalies near phase singularities in partially coherent light. These differ from anomalies in fully coherent light and can be engineered.

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Area of Science:

  • Optics and Photonics
  • Wave Phenomena
  • Coherence Theory

Background:

  • Partially spatially coherent light exhibits complex wave behavior.
  • Phase singularities are points where wave amplitude is zero.
  • Spectral anomalies in coherent light are well-documented.

Purpose of the Study:

  • To describe anomalous spectral degree of coherence near phase singularities.
  • To differentiate these anomalies from those in fully coherent fields.
  • To demonstrate engineering of spectral anomalies in partially coherent fields.

Main Methods:

  • Analysis of spectral degree of coherence.
  • Investigation of polychromatic wave fields.
  • Theoretical description of wave phenomena near singularities.

Main Results:

  • Discovery of novel spectral coherence anomalies.
  • Distinction between anomalies in partially and fully coherent fields.
  • Demonstration of engineering spectral anomalies.

Conclusions:

  • Spectral coherence anomalies exist in partially coherent fields.
  • These anomalies are distinct from those in fully coherent fields.
  • Engineering of spectral anomalies is achievable in partially coherent light.