Results 51 to 60 of about 616,352 (198)

Diffraction-Attenuation Resistant Beams: their Higher Order Versions and Finite-Aperture Generations

open access: yes, 2010
Recently, a method for obtaining diffraction-attenuation resistant beams in absorbing media was developed through suitable superposition of ideal zero-order Bessel beams. In this work, we will show that such beams maintain their resistance to diffraction
Besieris   +27 more
core   +1 more source

Cavity-free nondestructive detection of a single optical photon

open access: yes, 2015
Detecting a single photon without absorbing it is a long standing challenge in quantum optics. All experiments demonstrating the nondestructive detection of a photon make use of a high quality cavity.
Johnsson, Mattias   +3 more
core   +1 more source

Space-frequency correlation of classical waves in disordered media: high-frequency and small scale asymptotics

open access: yes, 2007
Two-frequency radiative transfer (2f-RT) theory is developed for geometrical optics in random media. The space-frequency correlation is described by the two-frequency Wigner distribution (2f-WD) which satisfies a closed form equation, the two-frequency ...
A. C. Fannjiang   +8 more
core   +1 more source

Photon polarisation entanglement from distant dipole sources

open access: yes, 2003
It is commonly believed that photon polarisation entanglement can only be obtained via pair creation within the same source or via postselective measurements on photons that overlapped within their coherence time inside a linear optics setup. In contrast
Almut Beige   +13 more
core   +1 more source

Goos-Haenchen and Imbert-Fedorov shifts of a nondiffracting Bessel beam

open access: yes, 2010
Goos-Haenchen and Imbert-Fedorov shifts are diffractive corrections to geometrical optics that have been extensively studied for a Gaussian beam that is reflected or transmitted by a dielectric interface.
Aiello, Andrea, Woerdman, J. P.
core   +1 more source

Free Space Optics Transmission Performance Enhancement for Sustaining 5G High Capacity Data Services. [PDF]

open access: yesMicromachines (Basel), 2022
Kamal M   +7 more
europepmc   +1 more source

Performance Analysis of Q Factor Optical Communication in Free Space Optics and Single Mode Fiber

open access: yesUniversal Journal of Electrical and Electronic Engineering, 2019
Developments in the technology sector are currently experiencing rapid progress, especially in data transmission technology. The increasing need for fast data traffic in the telecommunications sector requires technology that can send data quickly ...
Salim Burdah   +4 more
semanticscholar   +1 more source

Free Space Optics

open access: yes
When we design an optical system, we need to consider that the transmitting power is appropriate to reach the receiving end, if this power is less than required, it will be difficult to separate the data from the noise, which in turn, will causes errors.
openaire   +1 more source

Mitigation of dispersion and turbulence in a hybrid optical fibre and free-space optics link using electronic equalisation

open access: yesOptik (Stuttgart), 2019
Transmission of a 25 Gbps non-return to zero signal over a hybrid link of 20 km standard single-mode fibre and 500 m free-space optics under weak-to-moderate turbulence regimes is demonstrated via simulation to provide a practical solution for the last ...
D. Nguyen   +2 more
semanticscholar   +1 more source

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