Results 31 to 40 of about 316,906 (298)

Quantum wave equation of photon

, 2010
In this paper, we give the quantum wave equations of single photon when it is in the free or medium space. With these equations, we can study light interference and diffraction with quantum approach.
B.J. Smith, I. Bialynicki-Birula, I. Bialynicki-Birula, I. Bialynicki-Birula, J.E. Sipe, Li-Xin Chi, P.A.M. Dirac, P.A.M. Dirac, P.A.M. Dirac, Qing-Cai Wang, T.D. Newton, Xiang-Yao Wu, Xiao-Jing Liu, Yan Wang, Yi-Heng Wu   +14 more
core   +1 more source

2 × 20 Gbps - 40 GHz OFDM Ro-FSO transmission with mode division multiplexing [PDF]

Journal of the European Optical Society-Rapid Publications, 2014
Radio-over-Free-Space-Optics (Ro-FSO) is a promising technology for future wireless networks. In this work, we have designed a hybrid orthogonal frequency division multiplexing (OFDM) Ro-FSO system for transmission of two independent channels by mode ...
Amphawan A., Chaudhary S., Chan V.W.S.
doaj   +1 more source

Relay-assisted free-space optical communication [PDF]

IEEE Transactions on Wireless Communications, 2007
In this paper, we present relay-assisted transmission as a powerful fading mitigation tool for free-space optical systems operating in atmospheric turbulence channels. We study both serial (i.e., multi-hop transmission) and parallel (i.e., cooperative diversity) relaying encoupled with amplify-and-forward and decode-and-forward modes.
Majid Safari, Murat Uysal
openaire   +1 more source

Photorealistic ray tracing of free-space invisibility cloaks made of uniaxial dielectrics [PDF]

, 2012
The design rules of transformation optics generally lead to spatially inhomogeneous and anisotropic impedance-matched magneto-dielectric material distributions for, e.g., free-space invisibility cloaks.
Halimeh, Jad C., Wegener, Martin
core   +3 more sources

Coherent addition of two dimensional array of fiber lasers

, 2008
Configurations for efficient free space coherent addition of four separate fiber lasers arranged in two dimensional array are presented. They include compact and robust interferometric combiners that can be inserted either inside or outside the cavity of
Asher A. Friesem, Augst, Eckhouse, Eckhouse, Elena Luria, Fridman, He, Kozlov, Liu, Michaille, Moti Fridman, Nir Davidson, Shimshi, Shirakawa, Vardit Eckhouse, Vladimir Krupkin, Wrage, Zhu   +17 more
core   +1 more source

An elastomeric grating coupler [PDF]

, 2006
We report on a novel nondestructive and reversible method for coupling free space light to planar optical waveguides. In this method, an elastomeric grating is used to produce an effective refractive index modulation on the surface of the optical ...
Ay, F., Aydinli, A., Dana, A., Kocabas, A.   +3 more
core   +4 more sources

Novel Continuous-Time Markov Chain-Based Model for Performance Analysis of Hybrid Free Space Optics and Radio Frequency Communications

Applied Sciences
This paper introduces a Markov-process-based model to analyze the performance of hybrid Free Space Optics and Radio Frequency communication systems. The proposed model captures the dynamic behavior of the link by representing the transitions between ...
Vladimir Shakhov, Nikolai Shakhov, Insoo Koo   +2 more
doaj   +1 more source

Diffraction-free subwavelength-beam optics

, 2003
Diffraction is a fundamental property of light propagation. Owing to this phenomenon,light diffracts out in all directions when it passes through a subwavelength slit.This imposes a fundamental limit on the transverse size of a light beam at a given ...
Adams, Arlt, Ash, Bateman, Besieris, Bethe, Betzig, Betzig, Bouchal, Bouchal, Brittingham, Canning, Chavez-Cerda, Chew, Chutinan, Dogariu, Durnin, Ebbesen, Girard, Gori, Grunwald, Gutirrez-Vega, Gutirrez-Vega, Hafizi, Herman, Jarutis, Jones, Kukhlevsky, Kukhlevsky, Kukhlevsky, Kukhlevsky, Kukhlevsky, Kukhlevsky, Lewis, Lezec, M. Mechler, Marcuse, Martin-Moreno, McDonald, Neerhoff, Okamoto, Orlov, Orlov, Ouzounov, Porras, Porras, Porras, Porras, Rayleigh, Rushin, Rushin, S.V. Kukhlevsky, Saari, Saleh, Skryabin, Snyder, Stratton, Tsao, Vassallo, Yariv, Zamboni-Rached, Zamboni-Rached, Ziolkowski   +62 more
core   +1 more source

Mechanisms of parasite‐mediated disruption of brain vessels

FEBS Letters, EarlyView.
Parasites can affect the blood vessels of the brain, often causing serious neurological problems. This review explains how different parasites interact with and disrupt these vessels, what this means for brain health, and why these processes matter. Understanding these mechanisms may help us develop better ways to prevent or treat brain infections in ...
Leonor Loira, Sílvia Arroz‐Madeira, Cláudio A. Franco, Sara Silva Pereira   +3 more
wiley   +1 more source

Protecting entanglement of twisted photons by adaptive optics

, 2018
We study the efficiency of adaptive optics (AO) correction for the free-space propagation of entangled photonic orbital-angular-momentum (OAM) qubit states, to reverse moderate atmospheric turbulence distortions.
Buchleitner, Andreas, Leonhard, Nina, Reinlein, Claudia, Shatokhin, Vyacheslav N., Sorelli, Giacomo   +4 more
core   +1 more source