Results 31 to 40 of about 2,608 (229)

Manchester Return-to-Zero On–Off Keying Modulation for Free-Space Optical Communication

open access: yesPhotonics
This paper proposes a Manchester return-to-zero on–off keying (M-RZ-OOK) modulation for free-space optical (FSO) communication. M-RZ-OOK modulation is achieved by introducing Manchester coding into the RZ-OOK format.
Wenhao Zong   +4 more
doaj   +1 more source

An 80 Gb/s Silicon Photonic Modulator Based on the Principle of Overlapped Resonances

open access: yesIEEE Photonics Journal, 2017
We report a silicon photonic modulator based on a Mach–Zehnder interferometer (MZI) loaded with a microring modulator (MRM) on one arm and a microring resonator (MRR) on the other arm.
Rui Li   +7 more
doaj   +1 more source

Performance of BPSK subcarrier intensity modulation free-space optical communications using a log-normal atmospheric turbulence model [PDF]

open access: yes, 2010
In this paper, we present simulation results for the bit error rate (BER) performance and the fading penalty of a BPSK - subcarrier intensity modulation (BPSK-SIM) free-space optical (FSO) communication link in a log-normal atmospheric turbulence model ...
S. S. Muhammad   +13 more
core   +1 more source

Application and Analysis of Performance of DQPSK Advanced Modulation Format in Spectral Amplitude Coding OCDMA [PDF]

open access: yesMehran University Research Journal of Engineering and Technology, 2014
SAC (Spectral Amplitude Coding) is a technique of OCDMA (Optical Code Division Multiple Access) to encode and decode data bits by utilizing spectral components of the broadband source.
Abdul Latif Memon   +2 more
doaj  

Low Power FPGA Implementation of a Smart Building Free Space Optical Communication System

open access: yesPhotonics, 2022
Free Space Optical (FSO) communication systems have extensively invaded the speed of smart city evolution due to the current surge in demand for wireless communication spots that can match recent challenges due to high technical leaps in smart city ...
Rehab Ali   +4 more
doaj   +1 more source

Design and Evaluation of mmWave Backscatter Tag System for Internet of Things Applications

open access: yes, 2023
The demand for Internet of Things (IoT) devices that provide wireless communication has increased significantly in recent years. RFID technology is currently one of the most widely used and prevalent technologies.
Muin, Fathul   +2 more
core   +1 more source

Multi-Format Wavelength Conversion Using Quantum Dash Mode-Locked Laser Pumps

open access: yesPhotonics, 2015
We investigate and compare the performance of wavelength conversion for two different non-return-to-zero (NRZ) modulation formats at 40 Gb/s: on off keying (OOK) and differential phase-shift keying (DPSK).
Yousra Ben M’Sallem   +3 more
doaj   +1 more source

A SiPM-Based VLC Receiver for Gigabit Communication Using OOK Modulation

open access: yesIEEE Photonics Technology Letters, 2020
The growing demand for wireless communications services means that RF systems are increasingly unable to support user’s requirement. Consequently, there is a growing interest in using visible light communication (VLC), including interest in sensitive VLC receivers. Since they have the potential to detect single photons, silicon photomultipliers (SiPMs)
Zubair Ahmed   +5 more
openaire   +2 more sources

Epitaxial Integration of III–V Membrane Photodetectors With Lateral p–i–n Junctions on the Silicon‐On‐Insulator Waveguide Platform

open access: yesLaser &Photonics Reviews, EarlyView.
Epitaxial growth forms III–V membranes directly atop the silicon waveguide layer on SOI, while in‐plane in situ doping defines lateral p–i–n InP/InGaAs junctions in a single growth step. The membrane photodetectors achieve 50 Gb/s NRZ‐OOK operation.
Zhao Yan   +10 more
wiley   +1 more source

Feasibility study for high bit rate pulse position modulation in fibre communications [PDF]

open access: yes, 2013
With the rapid progress of optical communication systems, capacity limitation becomes important in high bit rate links. Overcoming this limitation may involve using different modulation and multiplexing methods, including RZ modulation with on-off keying
Ji, Feiyue
core  

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