In terms of the electric spectral density tensors associated with a random electromagnetic field, it is shown that, under certain conditions, a link can be established between two definitions of the degree of coherence for electromagnetic beams introduced not long ago by Wolf [Phys. Lett. A 312, 263 (2003)] and by Setälä et al. [Opt. Lett. 29, 328 (2004)] . This connection is formulated as a certain equivalence relationship concerning the behavior of the above degrees of coherence and the degree of polarization of the field at two points.
© 2007 Optical Society of America
Coherence and Statistical Optics
Original Manuscript: January 18, 2007
Revised Manuscript: March 23, 2007
Manuscript Accepted: March 23, 2007
Published: May 7, 2007
Rosario Martínez-Herrero and Pedro M. Mejías, "Relation between degrees of coherence for electromagnetic fields," Opt. Lett. 32, 1504-1506 (2007)