Results 151 to 160 of about 106,631 (202)

Effective degree of coherence: a second look

Journal of the Optical Society of America A: Optics and Image Science, and Vision, 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 ...
Kasimir Blomstedt, Tero Setala
exaly   +6 more sources

Degree of Coherence in Space-Division Multiplexed Transmission

Journal of Lightwave Technology, 2014
We generalize the concept of degree of polarization of single-mode fields to multi-mode fields by introducing a new parameter that we define degree of mutual coherence. The new definition enables characterizing by a single parameter the quality of the signal corrupted by various linear and nonlinear impairments at the output of an optical transmission ...
MECOZZI, ANTONIO, ANTONELLI, CRISTIAN
openaire   +3 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
core   +5 more sources

A bound on the temporal degree of coherence

Optics Communications, 1977
A bound on the absolute value of the temporal degree of coherence has been derived and formulated in terms of the degree of spectral similarity, which is a measure for the similarity of the power spectra of two signals, and the weighted averaged spectral degree of coherence, in which quantity the weighting function depends on these power spectra ...
Bastiaans, M.J.
openaire   +2 more sources

Complex degree of coherence for partially coherent general beams in atmospheric turbulence

Journal of the Optical Society of America A: Optics and Image Science, and Vision, 2007
With the use of the general beam formulation, the modulus of the complex degree of coherence for partially coherent cosh-Gaussian, cos-Gaussian, Gaussian, annular and higher-order Gaussian optical beams is evaluated in atmospheric turbulence. For different propagation lengths in horizontal atmospheric links, the moduli of the complex degree of ...
Yahya Baykal, Yangjian Cai, Halil T Eyyuboğlu   +2 more
exaly   +3 more sources

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

Definition of a second-order degree of polarization in terms of the complex degree of coherence

Journal of the Optical Society of America A, 2023
The classical theory of random electric fields and polarization formalism has been formulated considering the Stokes parameters’ auto-correlations. However, in this work, the need to consider the Stokes parameters’ cross-correlations to obtain a complete description of the polarization dynamics of a light source is explained.
Cristian Hernandez-Cely, Karol Salazar-Ariza, Rafael Torres   +2 more
openaire   +2 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

Measurement of the Degree of Coherence in Nonmonochromatic Light

Applied Optics, 1969
A method is described for measuring the degree of coherence, gamma(12)(tau), of two points in a plane illuminated, directly or through an optical system, by a nonmonochromatic source. The vibrations from the two points are superposed by means of a birefringent system.
openaire   +2 more sources