Browsing by Author "fnahal"
Now showing items 1-20 of 27
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A bidirectional radio-over-fiber system using differential phase-shift keying signals for downstream and remodulated OOK for upstream
(Urban & Fischer, 2013)Radio-over-fiber (ROF) is a promising technology to achieve future broadband access requirements with reliability, transparency and flexibility. We propose a novel full-duplex bi-directional radio-over-fiber (ROF) system ... -
A FULL-DUPLEX RADIO-OVER-FIBER ARCHITECTURE USING DIFFERENTIALL PHASE-SHIFT KEYING SIGNALS FOR DOWNSTREAM AND REMODULATED OOK FOR UPSTREAM
(Elsevier BV, 2012)Radio-over-Fiber (ROF) is a promising technology to achieve future broadband access requirements with reliability, transparency and flexibility. We propose a novel full-duplex bi-directional radio-over-fiber (ROF) system ... -
A WDM-PON with DPSK modulated downstream and OOK modulated upstream signals based on symmetric 10 Gbit/s wavelength reused bidirectional reflective SOA
(Tianjin University of Technology, 2017)We investigate a wavelength-division-multiplexing passive optical network (WDM-PON) with centralized lightwave and direct detection. The system is demonstrated for symmetric 10 Gbit/s differential phase-shift keying (DPSK) ... -
Applications of active arrayed-waveguide grating in future wavelength division multiplexing networks
(International Society for Optics and Photonics, 2003)The role of active arrayed-waveguide gratings (AWGs) in future dynamic wavelength-division multiplexing (WDM) networking and routing is investigated. Simulations are done using the beam propagation method (BPM). The results ... -
Bidirectional OFDM-WDM-PON System Employing 16-QAM Intensity Modulated OFDM Downstream and OOK Modulated Upstream
(2016)We have investigated an orthogonal frequency-division multiplexing (OFDM) wavelength-division-multiplexing (WDM) passive optical network (PON) with centralized lightwave and direct detection. The system was demonstrated ... -
Bidirectional WDM Access Architecture Employing Cascaded AWGs and RSOAs.
(الجامعة الإسلامية - غزة, 2014)Here we propose a bidirectional wavelength division multiplexing (WDM) access architecture employing cascaded cyclic arrayed waveguide gratings (AWGs) and reflective semiconductor optical amplifiers (RSOAs) for system ... -
Bidirectional WDM-radio over fiber system with sub carrier multiplexing using a reflective SOA and cyclic AWGs
(2011)A bidirectional SCM-WDM RoF network using a reflective semiconductor optical amplifier (RSOA) and cyclic arrayed waveguide gratings (AWGs) was proposed and demonstrated. The purposed RoF network utilizes Sub Carrier ... -
Bidirectional WDM–PON architecture using a reflective filter and cyclic AWG
(Urban & Fischer, 2011)We proposed and demonstrated a bidirectional SCM–WDM PON using a reflective filter and cyclic AWG where up/downlink data could be provided using a single optical source. In the proposed scheme, the signal for downstream ... -
Channel control and dispersion compensation using active arrayed waveguide grating (AWG)
(International Society for Optics and Photonics, 2017)The role of active Arrayed-Waveguide Grating (AWG) in future dynamic Wavelength Division Multiplexing (WDM) networking and routing was investigated. Simulations were done using the Beam Propagation Method (BPM). The results ... -
Coherent 16 Quadrature Amplitude Modulation (16QAM) Optical Communication Systems
(2018)Coherent optical fiber communications for data rates of 100Gbit/s and beyond have recently been studied extensively primarily because high sensitivity of coherent receivers could extend the transmission distance. Spectrally ... -
Comparison between OQPSK and DPSK bidirectional radio over fiber transmission systems
(Horizon Research Publishing, 2013)Radio over fiber is becoming an increasingly important technology for the wireless market since it introduces a higher data transmission rate and large bandwidth. In this paper, we have compared OQPSK and DPSK bidirectional ... -
Model of temperature dependence shape of ytterbium-doped fiber amplifier operating at 915 nm pumping configuration
(2011)We numerically analyze the temperature dependence of an ytterbium-doped fiber amplifier (YDFA) operating at 915 nm, investigating its gain and Noise Figure properties variation with temperature. The temperature-dependent ... -
Multistage WDM access architecture employing cascaded AWGs
(Academic Press, 2009)Here we propose passive/active arrayed waveguide gratings (AWGs) with enhanced performance for system applications mainly in novel access architectures employing cascaded AWG technology. Two technologies were considered ... -
Noise figure and gain temperature dependent of praseodymium-doped fiber amplifier by using rate equations
(North-Holland, 2010)A theoretical study of the temperature dependent noise effects of praseodymium-doped fiber amplifiers (PEDFAs) has been examined. The Pr3+-doped ZBLAN fiber amplifier pumped at 1017 nm and Pr3+-doped GeGa-sulfied fiber ... -
Optimal design of 32 channels spectrum slicing WDM for optical fiber access network system
(Urban & Fischer, 2014)In this article, the spectrum sliced dense wavelength division multiplexed passive optical network (SS-DWDM–PON) has been investigated as a power efficient and cost effective solution for optical access networks. In this ... -
Optimizing the EDFA gain for WDM lightwave system with temperature dependency
(Urban & Fischer, 2012)The gain-flattened erbium-doped fiber amplifier (EDFA) is a key device for wavelength division multiplexing (WDM) modern optical network systems. A flat spectral gain EDFA has been achieved by controlling the doped fiber ... -
Optimizing the thulium doped fiber amplifier (TDFA) gain and noise figure for S-band 16× 10 Gb/s WDM systems
(Urban & Fischer, 2013)This paper aims to evaluate a comprehensive numerical model based on solving rate equations of a thulium-doped silica-based fiber amplifier. The pump power and thulium-doped fiber (TDF) length for single-pass thulium-doped ... -
Penta-Band Dielectric Loaded Folded Loop Antenna for Mobile Handset
(2014)A compact internal penta-band folded loop antenna for LTE1600/2600/WIMAX3. 5/WLAN2. 4/5.2 multiple mobile operations is proposed and investigated. The whole antenna structure is formed of a single folded meander loop pattern ... -
Radio over fiber access network architecture employing RSOA with downstream OQPSK and upstream re-modulated OOK data
(Urban & Fischer, 2012)We have demonstrated a bidirectional reflective semiconductor optical amplifier (RSOA) based on wavelength division multiplexing ROF network utilizing an offset quadrature differential phase shift keying (OQPSK) signal for ... -
Schematic Representation for Illustrating the Procedure of Optical Noise Figure in Erbium-doped Fiber Amplifier (EDFA) and Praseodymium-doped Fiber Amplifier (PDFA)
(2011)The erbium-doped fiber amplifier (EDFA) operating at 1530 nm wavelength and the praseodymium-doped fiber amplifier (PDFA) at 1300 nm wavelength are promising components for optical fiber communications due to their high ...