Results 61 to 70 of about 1,417 (115)

Convolution of degrees of coherence

Optics Letters, 2015
The conditions under which convolution of two degrees of coherence represents a novel legitimate degree of coherence are established for wide-sense statistically stationary Schell-model beam-like optical fields. Several examples are given to illustrate how convolution can be used for generation of a far field being a modulated version of another one ...
Olga, Korotkova, Zhangrong, Mei
openaire   +2 more sources

Effective degree of coherence: a second look

Journal of the Optical Society of America A, 2015
In this paper, we show that the most general set of transformations of electromagnetic fields, for which overall (global) second-order coherence properties can reasonably be expected to remain unchanged, is the set of scaled unitary transformations. Building on our earlier results concerning coherence functionals that are invariant to scaled unitary ...
Blomstedt, K., Setala, T., Friberg, A.T.
openaire   +5 more sources

Coherence polarization filtering and relation with intrinsic degrees of coherence

Optics Letters, 2006
It is demonstrated for stationary fields that when the polarization state of the electric field can be modified arbitrarily the maximal value of the modulus of the degree of coherence proposed by Wolf [Phys. Lett. A312, 263 (2003)] is equal to the largest intrinsic degree of coherence.
Réfrégier, Philippe, Roueff, Antoine
openaire   +3 more sources

Degree of coherence: a lensless measuring technique

Optics Letters, 1993
We present a technique for measuring the degree of coherence that is based on the self-imaging phenomenon. The technique is lensless, has multiplexing capabilities, and can work with high light throughput. Experimental verifications are given.
J C, Barreiro, J, Ojeda-Castaneda
openaire   +2 more sources

Degree of paraxiality of a partially coherent field

Journal of the Optical Society of America A, 2010
We extend the concept of the degree of paraxiality, introduced recently for monochromatic fields, to the domain of stochastic fields. As an example we analytically evaluate the degree of paraxiality for a broad class of model stochastic fields, the Gaussian Schell-model fields, without and with truncation and twist phase.
Fei, Wang, Yangjian, Cai, Olga, Korotkova   +2 more
openaire   +2 more sources

Intrinsic degrees of coherence of partially polarized light

SPIE Proceedings, 2006
We address the problem of defining degrees of coherence for partially polarized light. We discuss a new theoretical approach that introduces intrinsic degrees of coherence. These parameters make it possible to separate partial polarization and partial coherence and are measurable quantities.
Réfrégier, Philippe, Goudail, François   +1 more
openaire   +2 more sources

Phase structuring of the complex degree of coherence

Optics Letters, 2018
Simple conditions on the magnitude and phase of the complex degree of coherence of stationary, scalar, one-dimensional (1D) Schell-like sources are derived for the design of novel optical beam-like fields. Several examples of new sources obtained with the help of signum, odd monomials, and sine phase functions are given.
Olga, Korotkova, Xi, Chen
openaire   +2 more sources

Degree of paraxiality of coherent and partially coherent Airy beams

Optics & Laser Technology, 2013
Abstract According to the definition of the degree of paraxiality for a monochromatic light beam, analytical expressions for the degree of paraxiality of coherent and partially coherent Airy beams are derived. Numerical results show that the degree of paraxiality of coherent and partially coherent Airy beams is determined not only by the ...
Yiming Dong, Liying Zhang, Jincai Luo, Wei Wen, Yongtao Zhang   +4 more
openaire   +1 more source

Complex Gaussian representations of partially coherent beams with nonconventional degrees of coherence

Journal of the Optical Society of America A, 2017
We adopt the recently introduced complex Gaussian function to expand the partially coherent beams with nonconventional degrees of coherence, and derive detailed representations of Hermite-Gaussian correlated Schell-model beam, elliptical Laguerre-Gaussian correlated Schell-model beam, and multi-Gaussian correlated Schell-model beam.
Fang, Wang, Yahong, Chen, Lina, Guo, Lin, Liu, Yangjian, Cai   +4 more
openaire   +2 more sources

OAM degree of coherence

Optics Letters
A new, to the best of our knowledge, scalar quantity characterizing radial correlations among all the orbital angular momentum (OAM) modes present in a random beam is introduced. It is given by the maximum value of the interference fringe contrasts produced by the filtered pairs of the OAM modes.
Olga Korotkova, Sushil Pokharel
openaire   +2 more sources