Radiation efficiency of three-dimensional, partially coherent, primary sources
- 1 August 1986
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America A
- Vol. 3 (8) , 1219-1223
- https://doi.org/10.1364/josaa.3.001219
Abstract
It is shown that the radiation efficiency of three-dimensional, primary sources depends strongly on their spatialcorrelation properties. A closed-form expression for the optimal correlation is derived for the Gaussian Schellmodel 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.Keywords
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