Results 31 to 40 of about 463,178 (329)
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
doaj +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
doaj +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
Adaptive Quantum Measurements of a Continuously Varying Phase [PDF]
, 2001 We analyze the problem of quantum-limited estimation of a stochastically varying phase of a continuous beam (rather than a pulse) of the electromagnetic field.
A.S. Holevo +9 more
core +2 more sources
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
openaire +1 more source
Homodyne-like detection for state-discrimination in the presence of phase noise [PDF]
, 2016 We propose an innovative strategy to discriminate between two coherent states affected by either uniform or gaussian phase noise. The strategy is based on a homodyne-like detection scheme with photon-number-resolving detectors in the regime of low ...
Allevi, Alessia +3 more
core +2 more sources
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
openaire +3 more sources
Lagrangian Based Methods for Coherent Structure Detection [PDF]
, 2015 There has been a proliferation in the development of Lagrangian analytical methods for detecting coherent structures in fluid flow transport, yielding a variety of qualitatively different approaches. We present a review of four approaches and demonstrate
Ma T. +4 more
core +1 more source
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