Results 101 to 110 of about 1,504,963 (315)

A Blind Nonlinearity Compensator Using DBSCAN Clustering for Coherent Optical Transmission Systems

open access: yesApplied Sciences, 2019
Coherent fiber-optic communication systems are limited by the Kerr-induced nonlinearity. Benchmark optical and digital nonlinearity compensation techniques are typically complex and tackle deterministic-induced nonlinearities.
Elias Giacoumidis   +6 more
doaj   +1 more source

Amplitude-Coherent Detection for Optical Wireless Communications: Opportunities and Limitations

open access: yesIEEE Open Journal of the Communications Society, 2020
The proliferation of ubiquitous computing applications created a multi-dimensional optimization problem that includes several conflicting variables such as spectral efficiency, complexity, power consumption, delay, and error probability.
Mohammad A. Al-Jarrah   +3 more
doaj   +1 more source

Photonic Hybrid Integration: Strategies and Promises of Advanced Additive Manufacturing

open access: yesAdvanced Optical Materials, EarlyView.
Heterogeneous photonic integration combines wafer bonding, transfer printing, and advanced multi‐photon lithography to realize compact, adaptable photonic systems. This review highlights breakthroughs in hybrid materials, metrology, and 4D printing, revealing how the convergence of traditional and emerging fabrication unlocks scalable, high‐performance
Zhitian Shi   +3 more
wiley   +1 more source

Enforcing Energy Balance in Coherently Superimposed Optical Vortices

open access: yesIEEE Photonics Journal, 2018
The generation of optical beams with multiple, mutually coherent orbital-angular-momentum (OAM) modes using phase gratings is analyzed from the perspective of energy distribution and radial mode composition.
Jaime Cisternas   +2 more
doaj   +1 more source

Comparison of phase-coherent and non-phase- coherent coded communications [PDF]

open access: yes
Word-error probability versus signal-to-noise ratio evaluation for five communications ...
Saliga, T. V., Strong, J. P., III
core   +1 more source

Telemetry receiver [PDF]

open access: yes, 1970
Communications system maintains phase lock of weak telemetry signals with a minimal expenditure of power and bandwidth.
Gilchriest, C.   +2 more
core   +1 more source

Improved Disorder Resilience in Small‐Footprint Photonic Cavities with Periodicity Breaking

open access: yesAdvanced Optical Materials, EarlyView.
Compact photonic crystal cavities with engineered aperiodicity are demonstrated to sustain high quality factormodes and enhanced reproducibility within a minimal footprint. Combining numerical optimization and near‐field measurements, the study reveals how controlled periodicity breaking improves disorder resilience, offering a robust and scalable ...
Nicoletta Granchi   +7 more
wiley   +1 more source

Characterization of Fiber Nonlinearity and Analysis of Its Impact on Link Capacity Limit of Two-Mode Fibers

open access: yesIEEE Photonics Journal, 2012
In this paper, we first measure fiber nonlinear Kerr coefficient of a two-mode fiber (TMF) by characterizing the four-wave mixing (FWM) components. Based on the measured nonlinear coefficient, we present an analysis of the link capacity for a two-mode ...
Xi Chen   +4 more
doaj   +1 more source

A proposal for the coherent propagation studies portion of the 10.6-micrometer laser communications experiment Advanced Technology Satellite-F technical proposal [PDF]

open access: yes
Coherent propagation study proposal for ATS-F 10.6 micrometer laser communications ...
Lawrence, R. S.   +3 more
core   +1 more source

Interplex modulation and a suppressed-carrier tracking loop for coherent communications systems [PDF]

open access: yes, 1974
Simple addition to hardware and new mode of operation of transmitter and receiver in coherent, PCM/PSK/PM configuration greatly improves channel efficiency.
Butman, S., Timor, U.
core   +1 more source

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