Results 51 to 60 of about 9,331 (329)

The Warm Receiver Section and the Digital Backend of the PHAROS2 Phased Array Feed [PDF]

, 2019
We describe the development of a multi-channel “warm receiver section” (WS) and of a digital beamformer for the PHAROS2 Phased Array Feed (PAF), a PAF demonstrator for radio astronomy application across the 4-8 GHz radio frequency (RF) band.
PUPILLO, Giuseppe, CATTANI, ALESSANDRO, CONCU, Raimondo, MATTANA, Andrea, PISANU, Tonino, SCHIRRU , LUCA, Chiello Riccardo, Zarb Adami, Kris, SCALAMBRA, ALESSANDRO, RODA, JURI, MONARI, JADER, BIANCHI, GERMANO, RUSTICELLI, SIMONE, Magro Alessio, SCHIAFFINO, MARCO, NAVARRINI, Alessandro, NALDI, Giovanni, SCHILLIRO', FRANCESCO, SABA, Andrea, LADU, Adelaide, POLONI, MARCO, NESTI, Renzo, MACCAFERRI, ANDREA, MORSIANI, MARCO, MARONGIU, Pasqualino, URRU, Enrico, COMORETTO, Giovanni, MELIS, Andrea, ORTU, Pierluigi, PERINI, FEDERICO   +29 more
core   +1 more source

Point source localization with a planar optical phased array compressive sensor

, 2022
Compressive sensing has been used to demonstrate scene reconstruction and source localization in a wide variety of devices. To date, optical compressive sensors have not been able to achieve significant volume reduction relative to conventional optics
Brown, Julian, Dawson, Robin, Poulton, Christopher, Greenbaum, Alexandra, Clevenson, Hannah, Moebius, Michael, Laine, JP, Watts, Michael, Benney, Lucas, Cahoy, Kerri, Huang, Alex, Dolle, Brian, Vresilovic, Daniel, Spector, Steven, Lane, Benjamin F   +14 more
core   +1 more source

Integrated phased-array 1×16 photonic switch for WDM optical packet switching application [PDF]

, 2009
Integrated InP/InGaAsP phased-array 1×16 optical switch is fabricated and characterized for broadband WDM optical packet switching. Wavelength-insensitive operation covering the C-band and penalty-free transmission of 40-Gbps signal are ...
Smit, M.K., T. Tanemura, T. de Vries, Soganci, IM, Nakano, Y Yoshiaki, Soganci, I.M., H. J. S. Dorren, I. M. Soganci, Vries, de, T., Tanemura, T, Calabretta, N., Smalbrugge, E, Smit, MK Meint, Dorren, H.J.S., Nakano, Y., N. Calabretta, Y. Nakano, Vries, T de, Calabretta, N Nicola, Tanemura, T., Smalbrugge, E., Williams, KA Kevin, M. K. Smit, K. A. Williams, Williams, K.A., E. Smalbrugge, Dorren, HJS Harm   +26 more
core   +1 more source

Vernier optical phased array lidar transceivers

Optics Express, 2022
Optical phased arrays (OPAs) which beam-steer in two dimensions (2D) are currently limited to grating row spacings well above a half wavelength. This gives rise to grating lobes along one axis which limit the field of view (FOV), introduce return signal ambiguity, and reduce the optical efficiency in lidar applications.
Nathan Dostart, Bohan Zhang, Michael Brand, Kenaish Al Qubaisi, Deniz Onural, Daniel Feldkhun, Miloš Popović, Kelvin Wagner   +7 more
openaire   +2 more sources

Silicon Ribbon-Based Dual-Beam Optical Phased Array with Low Crosstalk and Large FoV

Applied Sciences, 2022
In this paper, a silicon ribbon (SR)-based microstructure is developed and added to a 32-channel optical phased array (OPA) to reduce the crosstalk between the antennas of grating waveguides.
Hsun-Yuan Chi, Wei Hong, Hsuan Lai, Shih-Hsiang Hsu, Che-Chang Chang   +4 more
doaj   +1 more source

Broadband Operation of an InP Optical Phased Array

IEEE Photonics Technology Letters, 2022
We demonstrate the broadband operation and beam calibration over 70nm tuning range of an optical phased array (OPA) fabricated in a generic InP photonic integration platform, which enables multi-wavelength OPA operation. The broadband performance was demonstrated on an 8-channel OPA, whose calibration and phase modulator characterization were executed ...
M. Gagino, M. B. J. van Rijn, E. A. J. M. Bente, M. K. Smit, V. Dolores-Calzadilla   +4 more
openaire   +2 more sources

Large Scale Optical Assisted Mm-Wave Beam-Hopping System for Multi-Hop Bent-Pipe LEO Satellite Networks

Applied Sciences, 2023
By introducing the arrayed waveguide router (AWGR) optical true time-delay (OTTD) architecture in bent-pipe satellite optical inter-link to optically assist the RF phased array in Low-earth orbit satellites will extend the multi-hop bent-pipe satellite ...
Shiyi Xia, Peilong Liu, Mingyang Zhao, Cheng Zou, Fengwei Shao, Jifeng Jin, Haiwang Wang, Guotong Li   +7 more
doaj   +1 more source

First Demonstration of Dynamic High-Gain Beam Steering With a Scanning Lens Phased Array

IEEE Journal of Microwaves, 2022
We report on the first demonstration of dynamic beam steering using a scanning lens phased array. A scanning lens phased array relies on a combination of mechanical and electrical phase shifting to dynamically steer a high-gain beam beyond the grating ...
Sjoerd Bosma, Nick Van Rooijen, Maria Alonso-Delpino, Marco Spirito, Nuria Llombart   +4 more
doaj   +1 more source

FSO Receiver With Adaptive Alignment Based on Pure Phased Holographic Imaging

Frontiers in Physics, 2021
This paper proposes a free space optical communication (FSO) receivier system with adaptive alignment based on pure phase holographic imaging. During the frame header transmission period, the optical phased array in this system performs specific ...
Haibo Wang, Zaichen Zhang, Yidi Zhang
doaj   +1 more source

Design of a Low-Crosstalk Sub-Wavelength-Pitch Silicon Waveguide Array for Optical Phased Array

IEEE Photonics Journal, 2021
In this work, a compact sub-wavelength-pitch silicon waveguide array with low crosstalk is proposed and analyzed. The crosstalk is suppressed by periodic silicon nano-blocks symmetrically arranged along the silicon strip waveguides.
Guangzhu Zhou, Shi-Wei Qu, Jieyun Wu, Shiwen Yang   +3 more
doaj   +1 more source