Results 11 to 20 of about 10,845 (304)
Linear optics and photodetection achieve near-optimal unambiguous coherent state discrimination [PDF]
Quantum, 2023 Coherent states of the quantum electromagnetic field, the quantum description of ideal laser light, are prime candidates as information carriers for optical communications.
Jasminder S. Sidhu +3 more
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Coherent optical frequency combs: From principles to applications
Journal of Electronic Science and Technology, 2022 A coherent optical frequency comb is a kind of broad-spectrum light sources delivering equidistant frequencies, and correspondingly its temporal waveform appears as a sequence of ultrashort pulses.
Hao Zhang +8 more
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Ultrahigh-speed graphene-based optical coherent receiver
Nature Communications, 2021 Graphene-based photodetectors have many advantages for applications. Here, the authors demonstrate a high-speed optical coherent receiver for optical communications based on graphene-on-plasmonic slot waveguide photodetectors.
Yilun Wang +11 more
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Coherent Optical Communications
The Review of Laser Engineering, 1985 Coherent optical communication systems became possible with development of the gas laser in the early 1960s. During the decade following development of the laser, Enloe and Rodda showed homodyne detection to be possible when they successfully phase-locked two gas lasers.
T. G. Hodgkinson +3 more
openaire +3 more sources
Demonstration of 100 Gbps coherent free-space optical communications at LEO tracking rates
Scientific Reports, 2022 Free-space optical communications are poised to alleviate the data-flow bottleneck experienced by spacecraft as traditional radio frequencies reach their practical limit. While enabling orders-of-magnitude gains in data rates, optical signals impose much
Shane M. Walsh +7 more
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IEEE Photonics Journal, 2019 Demultiplexing of high-speed Nyquist optical time-division multiplexed (N-OTDM) signal requires ultra-narrow local sampling pulse to avoid the severe inter-symbol-interference (ISI) between each tributary.
Lei Yue, Deming Kong, Yan Li, Jian Wu
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Coherent optical binary polarisation shift keying heterodyne system in the free-space optical turbulence channel [PDF]
, 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 ...
Z. Ghassemlooy +12 more
core +1 more source
10-Gb/s Long-Reach PON System With Low-Complexity Dispersion-Managed Coherent Receiver
IEEE Photonics Journal, 2015 We demonstrate 10-Gb/s transmission over more than 130 km of G.652 fiber using a simple directly modulated distributed feedback (DFB) laser and a new “chirp-managed” approach based on a low-complexity coherent receiver.
R. Corsini +3 more
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Coherent optical communications enhanced by machine intelligence
Machine Learning: Science and Technology, 2020 Abstract Accuracy in discriminating between different received coherent signals is integral to the operation of many free-space communications protocols, and is often difficult when the receiver measures a weak signal. Here we design an optical communication scheme that uses balanced homodyne detection in combination with an unsupervised
Sanjaya Lohani, Ryan T. Glasser
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Coherent polarization shift keying modulated free space optical links over a Gamma-Gamma turbulence channel [PDF]
, 2011 Problem statement: The optical signal propagating through the Free Space Optical (FSO) channel suffers from irradiance and phase fluctuations caused by the atmospheric turbulence, which results in Bit Error Rate (BER) performance degradation ...
Ghassemlooy, Zabih +7 more
core +1 more source