Radiation efficiency of threedimensional, partially coherent, primary sources
Abstract
It is shown that the radiation efficiency of threedimensional, primary sources depends strongly on their spatialcorrelation properties. A closedform expression for the optimal correlation is derived for the Gaussian Schellmode sources. The result implies that for small source sizes the most efficient source is a fully coherent one, whereas for larger sources the optimal correlation distance gradually attains a constant value of about half the wavelength. A physical explanation based on interference is presented.
 Publication:

Journal of the Optical Society of America A
 Pub Date:
 August 1986
 DOI:
 10.1364/JOSAA.3.001219
 Bibcode:
 1986JOSAA...3.1219F
 Keywords:

 Coherent Light;
 Correlation;
 Light Sources;
 Spatial Distribution;
 Electromagnetic Fields;
 Electromagnetic Interference;
 Luminous Intensity;
 Normal Density Functions;
 Optimization;
 Optics;
 SOURCES;
 RADIATION;
 COHERENCE