Results 51 to 60 of about 108,903 (186)

Coherent optical binary polarisation shift keying heterodyne system in the free-space optical turbulence channel [PDF]

open access: yes, 2011
In this paper, analytical and simulation results for the bit error rate (BER) performance and fading penalty of a coherent optical binary polarization shift keying (2PolSK) heterodyne system adopted for a free space optical (FSO) communication link ...
C.G. Lee   +5 more
core   +1 more source

Optical communications through highly scattering channels using the coherence-rank

open access: yesAPL Photonics
In optical communications, logical bits are encoded in physical degrees-of-freedom (DoFs) of the electromagnetic field. Consequently, optical scattering in a communications channel compromises the information transfer.
Mitchell Harling   +3 more
doaj   +1 more source

Ultrahigh-Speed Signal Transmission Over Nonlinear and Dispersive Fiber Optic Channel: The Multicarrier Advantage

open access: yesIEEE Photonics Journal, 2010
There is a common belief that coherent optical orthogonal frequency-division multiplexing (CO-OFDM) has inferior nonlinear performance in the fiber optic channel due to its high peak-to-average power ratio (PAPR).
William Shieh, Yan Tang
doaj   +1 more source

Fundamentals of Quantum Fourier Optics

open access: yesIEEE Transactions on Quantum Engineering, 2023
All-quantum signal processing techniques are at the core of the successful advancement of most information-based quantum technologies. This article develops coherent and comprehensive methodologies and mathematical models to describe Fourier optical ...
Mohammad Rezai, Jawad A. Salehi
doaj   +1 more source

Photonic chip based optical frequency comb using soliton induced Cherenkov radiation

open access: yes, 2015
By continuous wave pumping of a dispersion engineered, planar silicon nitride microresonator, continuously circulating, sub-30fs short temporal dissipative solitons are generated, that correspond to pulses of 6 optical cycles and constitute a coherent ...
Brasch, Victor   +6 more
core   +1 more source

Stochastic Digital Backpropagation [PDF]

open access: yes, 2014
In this paper, we propose a novel detector for single-channel long-haul coherent optical communications, termed stochastic digital backpropagation (SDBP), which takes into account noise from the optical amplifiers in addition to handling deterministic ...
Agrell, Erik   +3 more
core   +1 more source

Clock Recovery Challenges in DSP-Based Coherent Single-Mode and Multi-Mode Optical Systems

open access: yesFuture Internet, 2018
We present an analysis of clock recovery algorithms in both polarization division multiplexing systems and mode division multiplexing systems. The impact of inter-polarization time skew and polarization mode dispersion in single-mode fibers, as well as ...
Júlio César Medeiros Diniz   +2 more
doaj   +1 more source

Generation of Ultrastable Microwaves via Optical Frequency Division

open access: yes, 2011
There has been increased interest in the use and manipulation of optical fields to address challenging problems that have traditionally been approached with microwave electronics.
A Bartels   +36 more
core   +1 more source

Tomography of a displacement photon counter for discrimination of single-rail optical qubits [PDF]

open access: yes, 2018
We investigate the performance of a Kennedy receiver, which is known as a beneficial tool in optical coherent communications, to the quantum state discrimination of the two superpositions of vacuum and single photon states corresponding to the $\hat ...
Andersen, Ulrik L.   +2 more
core   +2 more sources

Tendencias actuales y perspectivas de las comunicaciones ópticas [PDF]

open access: yes, 1988
A short review to the main problems today in optical Communications is given. Several topics, namely, coherent optical systems, high-speed transmission systems, optical switching, fluoride glasses and wavelength division multiplexing are studied.
Martín Pereda, José Antonio
core   +1 more source

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