The choice of functions used as cross-spectral densities is restricted by the constraint of non-negative definiteness. A sufficient condition for ensuring satisfaction of the definiteness constraint is discussed and several examples of application are given.
© 2006 Optical Society of America
(030.0030) Coherence and statistical optics : Coherence and statistical optics
(030.1640) Coherence and statistical optics : Coherence
(350.0350) Other areas of optics : Other areas of optics
(350.5500) Other areas of optics : Propagation
F. Gori, M. Santarsiero, and R. Borghi, "A Sufficient Condition for Non-Negative Definiteness of Cross-Spectral Densities," in Frontiers in Optics, OSA Technical Digest (CD) (Optical Society of America, 2006), paper JWD42.
References are not available for this paper.