Results 41 to 50 of about 55,652 (271)

Seeded x-ray free-electron laser generating radiation with laser statistical properties

open access: yes, 2018
The invention of optical lasers led to a revolution in the field of optics and even to the creation of completely new fields of research such as quantum optics. The reason was their unique statistical and coherence properties.
Capotondi, F.   +14 more
core   +3 more sources

Generation and Propagation of a Hermite-Gaussian Correlated Schell-Model LG0l Beam

open access: yesApplied Sciences, 2019
A partially coherent beam under the combined action of a Hermite-Gaussian correlated function and vortex phase, named the HGCSMLG0l beam has been explored both theoretically and experimentally.
Xiaofeng Peng   +6 more
doaj   +1 more source

Transverse coherence properties of X-ray beams in third-generation synchrotron radiation sources

open access: yes, 2008
This article describes a complete theory of spatial coherence for undulator radiation sources. Current estimations of coherence properties often assume that undulator sources are quasi-homogeneous, like thermal sources, and rely on the application of the
Bahrdt   +23 more
core   +1 more source

Statistical Studies of Fading in Underwater Wireless Optical Channels in the Presence of Air Bubble, Temperature, and Salinity Random Variations (Long Version) [PDF]

open access: yes, 2018
Optical signal propagation through underwater channels is affected by three main degrading phenomena, namely absorption, scattering, and fading. In this paper, we experimentally study the statistical distribution of intensity fluctuations in underwater ...
Abdollahramezani, Sajjad   +8 more
core   +3 more sources

Optical polarization rogue waves from supercontinuum generation in zero dispersion fiber pumped by dissipative soliton [PDF]

open access: yes, 2019
Optical rogue waves emerge in nonlinear optical systems with extremely large amplitudes, and leave without a trace. In this work, we reveal the emergence of optical polarization rogue waves in supercontinuum generation from a zero-dispersion fiber ...
Cao, Yulong   +9 more
core   +1 more source

Density Operators for Fermions

open access: yes, 1998
The mathematical methods that have been used to analyze the statistical properties of boson fields, and in particular the coherence of photons in quantum optics, have their counterparts for Fermi fields.
Cahill, Kevin E., Glauber, Roy J.
core   +2 more sources

Mobility and transverse flow visualization using phase variance contrast with spectral domain optical coherence tomography [PDF]

open access: yes, 2007
Phase variance-based motion contrast is demonstrated using two phase analysis methods in a spectral domain optical coherence tomography system. Mobility contrast is demonstrated for an intensity matched Intralipid solution placed without flow within ...
Fingler, Jeff   +3 more
core   +1 more source

Statistical moments-based OSNR monitoring for coherent optical systems

open access: yesOptics Express, 2012
We present a novel statistical moments-based method for optical signal-to-noise ratio (OSNR) monitoring in polarization-multiplexed (pol-mux) coherent optical systems. This technique only requires the knowledge of the envelope of the equalized signal before phase correction, which can be achieved by using any two arbitrary statistical moments, and it ...
Chen, Zhu   +7 more
openaire   +2 more sources

Innovative Multi-Site Photoplethysmography Analysis for Quantifying Pulse Amplitude and Timing Variability Characteristics in Peripheral Arterial Disease

open access: yesDiseases, 2018
Photoplethysmography (PPG) is a simple-to-perform vascular optics measurement technique that can detect blood volume changes in the microvascular bed of tissue.
Michael Bentham   +2 more
doaj   +1 more source

Penetration depth of low-coherence enhanced backscattered light in sub-diffusion regime

open access: yes, 2007
The mechanisms of photon propagation in random media in the diffusive multiple scattering regime have been previously studied using diffusion approximation. However, similar understanding in the low-order (sub-diffusion) scattering regime is not complete
A. Wax   +11 more
core   +1 more source

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