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Coherence patterns originating from incoherent volume sources.

Kehan Tian1, George Barbastathis

  • 1Department of Mechanical Engineering, Massachusetts Institute of Technology, Room 3-461c, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA. kehan@mit.edu

Optics Letters
|April 10, 2004
PubMed
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This study explores coherence from 2D and 3D incoherent sources, analyzing how source thickness affects coherence decay and identifying areas of maximum coherence.

Area of Science:

  • Optics and Photonics
  • Classical Optics
  • Coherence Theory

Background:

  • The complex degree of coherence is a fundamental property describing the correlation of light fields.
  • Understanding coherence properties of light from extended sources is crucial for various optical applications.
  • Previous studies often focused on simpler source models or specific dimensionality.

Purpose of the Study:

  • To derive the complex degree of coherence for generalized incoherent two- and three-dimensional sources.
  • To determine the locus of maximum spatial coherence.
  • To investigate the relationship between source thickness and the decay of coherence.

Main Methods:

  • Mathematical derivation of the complex degree of coherence using integral methods.

Related Experiment Videos

  • Analysis of the derived coherence functions for different source geometries.
  • Numerical evaluation and visualization of coherence properties.

    • Main Results:

    • Formulation of the complex degree of coherence for generalized 2D and 3D incoherent sources.
    • Identification of specific regions exhibiting maximum spatial coherence.
    • Demonstration that coherence decay is dependent on the source's physical thickness.

    Conclusions:

    • The derived formulas provide a comprehensive framework for understanding coherence from complex incoherent sources.
    • The locus of maximum coherence offers insights into the spatial extent of correlated light.
    • Source thickness is a critical parameter influencing the degradation of coherence.