Results 31 to 40 of about 5,174,138 (292)
IEEE Photonics Journal, 2012 We propose a millimeter-wave (MMW) coherent radio-over-fiber (RoF) transmission system for application to an access network with a direct broadband last-mile wireless connection to an optical fiber network.
A. Kanno +7 more
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Randomness quantification of coherent detection [PDF]
Physical Review A, 2018 Continuous-variable quantum cryptographic systems, including random number generation and key distribution, are often based on coherent detection. The essence of the security analysis lies in the randomness quantification. Previous analyses employ a semi-
Hongyi Zhou +3 more
semanticscholar +1 more source
IEEE Photonics Journal, 2023 This paper experimentally investigates the perform-ance of free-space optical (FSO) communication based on mode diversity reception (MDR) using nonmode selective photonic lantern (NSPL) and equal gain combining (EGC).
Feng Wang +3 more
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Semi-Coherent Detection and Performance Analysis for Ambient Backscatter System [PDF]
IEEE Transactions on Communications, 2016 We study a novel communication technique, ambient backscatter, that utilizes radio frequency signals transmitted from an ambient source as both energy supply and information carrier to enable communications between low-power devices.
Jing Qian +4 more
semanticscholar +1 more source
Portable Pulsed Coherent Lidar for Noncooperation Targets at the Few-Photon Level
Sensors, 2021 The decoherence in coherent lidar becomes serious with the increase in distance. A small laser spot can suppress the decoherence of the echo light from noncooperation targets. However, it is very difficult to keep a small light spot over a long distance.
Chengkai Pang +3 more
doaj +1 more source
Laser detection utilizing coherence [PDF]
Technologies for Optical Countermeasures XVI, 2019 Lasers are an unnatural occurrence, rendered almost impossible in nature due to the laws of thermodynamics. Thus, the presence of laser radiation is always accompanied by an intent for that laser such as sensing, targeting, range finding etc. Detection of laser radiation is therefore important as it may be a precursor to impending action. Laser warning
Benton, David M. +2 more
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Recent Advances in Coherent Optical Communications for Short-Reach: Phase Retrieval Methods
Photonics, 2023 Short-reach transmission systems traditionally utilize intensity modulation (IM) at the transmitter and direct detection (DD) at the receiver due to their cost-effectiveness, small footprint, and low power consumption.
Abdullah S. Karar +4 more
doaj +1 more source
Complex imaging via coherent detection
Optics Express, 2017 Complex imaging via coherent detection is proposed for acquiring two-dimensional (2-D) nearfield optical image that recovers amplitude and phase simultaneously. Based on the proposed complex imaging, we experimentally demonstrate the technique by detecting few-mode-fiber (FMF) modes with high extinction-ratio, and perform mode decomposition and ...
Yifei, Wang +4 more
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Capturing the amplitude and phase profile of the vortex beam based on coherent detection
Frontiers in Physics, 2022 In this study, we propose a scheme to capture the amplitude and phase profile of the orbital angular momentum (OAM) beam based on coherent detection. In the scheme, the OAM beam to be measured is interfered with a local plain wave which is prepared at ...
Shengmei Zhao +3 more
doaj +1 more source
Atomic Detection and Matter-Wave Coherence [PDF]
Physical Review Letters, 1998 We analyze several models of atomic detectors in the context of the measurement of coherence properties of matter waves. In particular, we show that an ionization scheme measures normally-ordered correlation functions of the Schr dinger field, in analogy with the optical situation.
Goldstein, E. V., Meystre, Pierre
openaire +2 more sources