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Providing ultra high-speed end-to-end connectivity in core optical networks while satisfying the requirements for quality of service is a topic of intense research. In an optical network, a connection is set up to carry a data signal via an all-optical channel (lightpath) from its source to destination nodes. The analog nature of the signal transmission(More)
In this paper, we review, first, the different noise terms involved in amplified and filtered spontaneous emission detection using the standard beating theory (or the semi-classical field expansion theory) of the noise in optical amplifiers. We derive BER calculations using the following approaches: 1) non-ideal electrical and optical filters combined with(More)
In this paper, we investigate the generation of ultra-flat Optical Flat Comb Source (OFCS) using an asymmetrically driven Dual Arm Mach-Zehnder modulator (DA-MZM). A modified simulated annealing-based optimization method is applied to derive the necessary ranges for which the comb source is ultra-flat (less than 1 dB ripple) over 2, 4, 8, 16 and 32 carriers(More)
In this paper a novel cognitive Radio over Fiber (RoF) system lined up with Software Defined Networking (SDN) requirements is presented. First, the SDN paradigm for the proposed hybrid RoF system with centralized topology is developed. Then, cognitive process enabling self-aware RoF network is outlined. The goal is to allow traffic and network supervision(More)
Next Generation Networks (NGN) are based on the coexistence of heterogeneous systems delivering diverse services and assuring high data rates. Small cell systems (Pico-cells and femto-cells) based on Radio over Fiber (RoF) networks are a booming technology since they densify the network, burst the network capacities and increase the system throughputs. This(More)
In this paper, we investigate an optical multicarrier source to achieve 160 Gb/s by wavelength using Polarization Multiplexing-Differential Quadrature Phase Shift Keying (POLMUX-DQPSK) and Dual Carrier-Differential Quadrature Phase Shift Keying (DC-DQPSK) with 33RZ (Return-to-Zero) pulse carving and coherent detection. The optical multicarrier source is(More)
This paper analyses the spectral efficiency of Optical Code Division Multiple Access (OCDMA) system using Fiber Bragg Grating (FBG). We consider three configurations of OCDMA system namely DS-OCDMA (Direct Sequence-OCDMA), SAC-OCDMA (Spectral Amplitude Coding-OCDMA), FFH-OCDMA (Fast Frequency Hopping-OCDMA). The system performances are evaluated by taken in(More)
The development of reconfigurable and high throughput architectures is the utmost target for researchers in the field of Radio over Fiber (RoF). In this paper, we developed a cognitive radio over fiber system lined up with Software Defined Networking owing to improve the quality of transport using a pre-equalization technique. The pre-equalization technique(More)
WDM optical systems and nonlinear effects are experiencing last years a huge investigation for performance evaluation. In this paper, and for high speed phase modulated WDM Nyquist systems, a novel method of PMD and first-order PMD (DGD) monitoring using cross phase modulation effect is presented. This technique demonstrate that in the presence of XPM(More)
A novel way to generate asymmetric optical comb sources is presented. Optical comb sources are an essential component of Terabit orthogonal frequency-division multiplexing (OFDM) and wavelength division multiplexing-Nyquist (WDM-Nyquist) systems. Each arm of the modulator is excited with the linear combination of two sine waves. An asymmetric output(More)