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Multi-vortex laser enabling spatial and temporal encoding

Zhen Qiao, Zhenyu Wan, Guoqiang Xie, Jian Wang, Liejia Qian, Dianyuan Fan
2020 PhotoniX  
Utilizing these distinct spatial-temporal characteristics, we demonstrate that the multi-vortex laser can be spatially and temporally encoded for data transmission, showing the potential of the developed  ...  Temporally, the multi-vortex beams can be simultaneously self-mode-locked, and each vortex component carries pulses with GHz-level repetition rate.  ...  On the other hand, temporal encoding can be achieved by modulating the mode-locked pulses as temporal codes. Both spatial and temporal encoding can be applied for data transmission.  ... 
doi:10.1186/s43074-020-00013-x fatcat:gxksoh6mozbp3leihtcmi2fvnm

Progress of the injection laser system of SG-II

Wei Fan, Youen Jiang, Jiangfeng Wang, Xiaochao Wang, Dajie Huang, Xinghua Lu, Hui Wei, Guoyang Li, Xue Pan, Zhi Qiao, Chao Wang, He Cheng (+7 others)
2018 High Power Laser Science and Engineering  
shaping, pre-amplifier technology, and the optical parametric chirped pulse amplification pump source.  ...  To accomplish this, global laser characteristics control should be assured, which was the main purpose of the injection laser system.  ...  A high transmittance renders this kind of transmissive amplitude-mode spatial modulator very useful in many high power/energy laser systems.  ... 
doi:10.1017/hpl.2018.31 fatcat:p5se7scnfvhlzjoeyfzx7qulhy

Exabit optical communication explored using 3M scheme

Masataka Nakazawa
2014 Japanese Journal of Applied Physics  
[ Fig. 16(b)] , 27) or a liquid crystal on silicon (LCOS)type spatial intensity and phase modulator for beam profiling [ Fig. 16(c) ]. 28) Recent demonstrations of mode-division-multiplexed transmission  ...  The Gaussian pulses were transformed into a Nyquist profile by using a spectrum manipulation technique based on the spatial intensity and phase modulation of spectral components with a liquid crystal spatial  ... 
doi:10.7567/jjap.53.08ma01 fatcat:eypidyxxafevfor4u4d5m7437a

Optical fibre sensors based on multi-mode fibres and MIMO signal processing: an experimental approach

Andreas Ahrens, Andre Sandmann, Kort Bremer, Bernhard Roth, Steffen Lochmann, Hypolito J. Kalinowski, José Luís Fabris, Wojtek J. Bock
2015 24th International Conference on Optical Fibre Sensors  
A (2 × 2) MIMO implementation is realized by using lower-order and higher-order mode groups of a graded-index (GI) multi-mode fibre (MMF) as separate transmission channels.  ...  By observing the weight-factors of the MIMO system the amount of load applied was determined.  ...  (DSO), a pulse generator (PS) (Picosecond Diode Laser System), a position controller (PC) as well as a spatial mode (MF) filter in front of the detector.  ... 
doi:10.1117/12.2195114 fatcat:yyd2zb67trepthluapzgyhv7ki

All‐Dielectric Programmable Huygens' Metasurfaces

Aleksandrs Leitis, Andreas Heßler, Sophia Wahl, Matthias Wuttig, Thomas Taubner, Andreas Tittl, Hatice Altug
2020 Advanced Functional Materials  
elements like tunable lenses, dynamic holograms, and spatial light modulators.  ...  Tunable all-dielectric infrared Huygens' metasurfaces consisting of multi-layer Ge disk meta-units with strategically incorporated non-volatile phase change material Ge 3 Sb 2 Te 6 are introduced.  ...  The authors also acknowledge École Polytechnique Fédérale de Lausanne and Center of MicroNano Technology for nanofabrication, and J. Gao for the sputter deposition of the thin film layer stacks.  ... 
doi:10.1002/adfm.201910259 fatcat:5vu3ge7zdrdp3eccjm7m52fqoq

Contents

2019 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring)  
Radar with an Excited RF Pulse Generator for Vital-sign Application . . . . . . . 1569 Wireless Power Transmission System for a Rotating Propulsive Shaft with Multiple Transmit and Receive Coils .  ...  Random PRI and Staggered PW Radar . . . . . . . 1037 The Use of Phase-shift Keyed Signals with a Zero Autocorrelation Zone in a Multi-position Radar System for Searching and Detecting of Space Debris  ... 
doi:10.1109/piers-spring46901.2019.9017748 fatcat:lmmr7cnm7nelbbz3f6arofik4q

Controlling single-photon Fock-state propagation through opaque scattering media

Thomas J. Huisman, Simon R. Huisman, Allard P. Mosk, Pepijn W. H. Pinkse
2013 Applied physics B  
We enhance the probability that a single photon arrives in a target output mode with a factor 10.  ...  We control the propagation of single-photon Fock states in opaque scattering materials by phase modulation of the incident wavefront.  ...  This mode is incident on a spatial light modulator (SLM, Hamamatsu LCOS-SLM), enabling to program the spatial phase pattern of this mode.  ... 
doi:10.1007/s00340-013-5742-5 fatcat:7zo7ch372rb7tnkx2if2whngmm

Multidimensional radar waveforms a new paradigm for the design and operation of highly performant spaceborne synthetic aperture radar systems

Gerhard Krieger, Nicolas Gebert, Alberto Moreira
2007 2007 IEEE International Geoscience and Remote Sensing Symposium  
The combination of this technique with digital beamforming on receive enables a new class of highly performant SAR systems employing novel and highly flexible radar imaging modes.  ...  , and the implementation of hybrid SAR imaging modes that are well suited to satisfy the hitherto incompatible user requirements for frequent monitoring and detailed mapping.  ...  For the HRWS system, which combines a single fixed illuminator with a multi-channel receiver, one obtains for each transmitted pulse in total N Rx effective phase centers.  ... 
doi:10.1109/igarss.2007.4423969 dblp:conf/igarss/KriegerGM07 fatcat:z4z3wnfkm5gjvo373atldlndue

Control of the temporal and polarization response of a multimode fiber [article]

Mickael Mounaix, Joel Carpenter
2019 arXiv   pre-print
Control of the spatial and temporal properties of light propagating in disordered media have been demonstrated over the last decade using spatial light modulators.  ...  systems and high power fiber lasers.  ...  Acknowledgements The authors thank Martin Plöschner for careful reading of our manuscript.  ... 
arXiv:1905.02886v1 fatcat:7mbbrxcqczft5fjlvomjegqdoy

Multidimensional waveform encoding for spaceborne synthetic aperture radar systems

Gerhard Krieger, Nicolas Gebert, Alberto Moreira
2007 2007 International Waveform Diversity and Design Conference  
hybrid SAR imaging modes which are well suited to satisfy hitherto incompatible user requirements.  ...  The combination of this technique with digital beamforming on receive enables a new generation of SAR systems with improved performance and flexible imaging capabilities.  ...  For the HRWS system, which combines a single fixed illuminator with a multi-channel receiver, one obtains for each transmitted pulse in total N Rx effective phase centers.  ... 
doi:10.1109/wddc.2007.4339427 fatcat:jks54urobvbvveojj52r3qypbq

Soliton generation in active nonlinear metamaterials

Alexander B. Kozyrev, Ilya V. Shadrivov, Yuri S. Kivshar
2014 Applied Physics Letters  
Our meta-structure consists of a ring resonator formed by a microwave amplifier loaded with a left-handed transmission line.  ...  Articles you may be interested in Low-power all-optical tunable plasmonic-mode coupling in nonlinear metamaterials Appl. Phys. Lett.  ...  This is why it is a single pulse that is typically generated in ring resonator experiments, and why multi-soliton modes in confined system received very little attention to date.  ... 
doi:10.1063/1.4866856 fatcat:4h2i3dg62ndxfj73ledhwnpksy

Advanced synthetic aperture radar based on digital beamforming and waveform diversity

Gerhard Krieger, Nicolas Gebert, Marwan Younis, Alberto Moreira
2008 2008 IEEE Radar Conference  
The new concepts rely on the combination of advanced multi-channel SAR front-end architectures with novel operational modes.  ...  This paper introduces innovative SAR system concepts for the acquisition of high resolution radar images with wide swath coverage from spaceborne platforms.  ...  Multi-Channel ScanSAR Mode The main drawback of the multi-channel stripmap mode is the long antenna required for wide swath imaging.  ... 
doi:10.1109/radar.2008.4720875 fatcat:wbxnhlgf45dxlao2srgpijxnmy

Ultra Wideband Pulse Modulation System In Comparison To Conventional Narrowband Wireless Systems

Vikas Goyal, BS Dhaliwal
2016 Zenodo  
In this paper, we will discuss the UWB pulse modulation system using gaussian pulse its advantages and comparison with conventional narrowband wireless systems.  ...  Ultra wideband (UWB) technology, useful for both communication and remote sensing applications.  ...  The information could be modulated using several different techniques like Pulse Position, Pulse amplitude, Bi phase etc.  ... 
doi:10.5281/zenodo.50375 fatcat:lhmgbaai3bc6vny5cf6lqtnnee

Software Defined Adaptive MIMO Visible Light Communications after an Obstruction [article]

Peng Deng, Mohsen Kavehrad
2016 arXiv   pre-print
We experimentally demonstrate a software-defined 2x2 MIMO VLC system employing link adaptation of spatial multiplexing and diversity.  ...  The average error-free spectral efficiency of 12 b/s/Hz is achieved over 2 meters indoor transmission after an obstruction.  ...  Techniques such as high spectrally efficient modulation [4] , wavelength division multiplexing (WDM) [5] and optical multi-input multi-output (MIMO) [6] have enhanced capacity of VLC system.  ... 
arXiv:1612.05402v1 fatcat:rwjiyyrtljauja7443okmgqzfi

IMPROVING OPTICAL FIBER SENSING BY MIMO SIGNAL PROCESSING

Andreas Ahrens, André Sandmann, André Sandmann, Kort Bremer, Bernhard Roth, Steffen Lochmann
2016 Informatyka Automatyka Pomiary w Gospodarce i Ochronie Środowiska  
A (2x2) MIMO implementation is realized by using lower-order and higher-order mode groups of a gradient-index multi-mode fiber as separate transmission channels.  ...  Besides the high number of sensor groups, multi-mode fiber evanescent field sensors can be found in a lot of applications.  ...  The described MIMO model can be used for modulated signals, e.g. a pulse, as well as for continuous wave (CW) signals.  ... 
doi:10.5604/20830157.1212268 fatcat:xpfdfabaybddvdaswere2t5nvi
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