Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, 1-2-1 Namiki, Tsukuba 305-8564, Japan.
Opt Lett. 2009 Dec 1;34(23):3761-3. doi: 10.1364/OL.34.003761.
Coherence and polarization properties of the field generated by a partially polarized incoherent source are examined in terms of the 2x2 cross-spectral density matrix, with a view to deriving an electromagnetic counterpart of the van Cittert-Zernike theorem. Emphasis is placed on the polarization properties of the field. As some consequences of the extended theorem, we found that the spectral degree of polarization of the resultant field is generally different from that of the source and that both are the same in a special case. A different somewhat unconventional view of the extended theorem is also discussed in brief.
部分偏振非相干光源产生的场的相干性和偏振特性，通过 2x2 交叉谱密度矩阵来研究，以期得到 van Cittert-Zernike 定理的电磁对应。重点是场的偏振特性。作为扩展定理的一些推论，我们发现，合成场的光谱偏振度通常与光源不同，而在特殊情况下两者相同。此外，还简要讨论了扩展定理的一种不同的、有些非传统的观点。
