Results 11 to 20 of about 127,186 (271)

Sensitivity Deterioration of Free-Space Optical Coherent/Non-Coherent OOK Modulation Receiver by Ambient Light Noise

open access: yesSensors, 2023
In free-space optical (FSO) communication systems, on–off keying (OOK) is a widely used modulation format. Coherent and non-coherent OOK receivers with sensitivities of −54.60 dBm and −51.25 dBm, respectively, were built with a communication rate of 1 ...
Weijie Ren   +3 more
doaj   +1 more source

Conditional Production of Superpositions of Coherent States with Inefficient Photon Detection [PDF]

open access: yes, 2004
It is shown that a linear superposition of two macroscopically distinguishable optical coherent states can be generated using a single photon source and simple all-optical operations.
Jeong, H.   +3 more
core   +3 more sources

Non-Orthogonality Measure for a Collection of Pure Quantum States

open access: yesEntropy, 2022
Modern optical communication technology can realize a large-scale multilevel (or M-ary) optical signal. Investigating the quantum mechanical nature of such a large-scale M-ary optical signal is essential for a unified understanding of quantum information
Kentaro Kato
doaj   +1 more source

Low-Complexity Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver

open access: yesPhotonics, 2022
This paper proposes a novel and efficient low-complexity chromatic dispersion equalizer (CDE) based on finite impulse response (FIR) filter architecture for polarization-multiplexed coherent optical communication systems.
Zicheng Wu   +4 more
doaj   +1 more source

Phase-coherent lightwave communications with frequency combs [PDF]

open access: yes, 2019
Fiber-optical networks are a crucial telecommunication infrastructure in society. Wavelength division multiplexing allows for transmitting parallel data streams over the fiber bandwidth, and coherent detection enables the use of sophisticated modulation ...
Andrekson, Peter A.   +7 more
core   +2 more sources

Comparison between Direct and Coherent Optical Communication System

open access: yesمجلة بغداد للعلوم, 2011
The work in this paper focuses on the system quality of direct and coherent communication system for two computers. A system quality is represented by Signal to Noise ratio (SNR) and Bit Error Rate (BER).
Baghdad Science Journal
doaj   +1 more source

Four-dimensional experimental characterization of partially coherent light using incoherent modal decomposition

open access: yesNanophotonics, 2023
The intensity distributions and statistics of partially coherent light fields with random fluctuations have proven to be more robust than for coherent light.
Lu Xingyuan   +4 more
doaj   +1 more source

Data Fragmentation Multipath Secure Coherent Optical Communication System Based on Electrical Signal Processing

open access: yesIEEE Photonics Journal, 2022
In this paper, we report a novel optical data fragmentation multipath (ODFM) scheme for coherent optical communication based on electrical signal processing in simulation.
Kunpeng Zhai   +6 more
doaj   +1 more source

Digital equalization of time-delay array receivers on coherent laser communications [PDF]

open access: yes, 2017
© [2017 Optical Society of America.]. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the ...
Belmonte Molina, Aniceto
core   +2 more sources

Compensation of Limited Bandwidth and Nonlinearity for Coherent Transponder

open access: yesApplied Sciences, 2019
Coherent optical transponders are widely deployed in today’s long haul and metro optical networks using dense wavelength division multiplexing.
Qiang Wang, Yang Yue, Jon Anderson
doaj   +1 more source

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