A5029518811- Education and Digital Technologies
- Optical Network Technologies
- Advanced Fiber Laser Technologies
- Advanced Fiber Optic Sensors
- Photonic Crystal and Fiber Optics
- Opportunistic and Delay-Tolerant Networks
- Photonic and Optical Devices
- Information Science and Libraries
- Vehicular Ad Hoc Networks (VANETs)
- Digital literacy in education
- Advanced Optical Network Technologies
- Laser-Matter Interactions and Applications
- Science and Education Research
- Mobile Ad Hoc Networks
- Business and Management Studies
- Advanced Photonic Communication Systems
Instituto Federal de Educação, Ciência e Tecnologia do Ceará
2014-2020
Universidade Estadual do Ceará
2007
In this work, we present a numerical study to investigate the transmission, extinction ratio, crosstalk and compression factor outputs of Mach–Zehnder interferometer in photonic crystal fibers by varying nonlinearity parameter fiber from β = 1 2 for three different profiles (constant, increasing decreasing) scenarios (P 0 Pc, P < Pc > Pc). We observed that highest transmission (T 67%), ratio (XR 3.57 dB) lowest (Xtalk -5.25 occurred third scenario 110 kW Pc) considering decreasing...
One of the main limitations optical communication systems is current need for optoelectronic conversions in intermediate devices, which do not reach transmission rates fibers terabits per second. In this work, we investigated obtaining logic gates through a configuration Mach-Zehnder interferometer with semiconductor amplifier (SOA) as unbalancing element interferometer. We experimentally studied three different scenarios input power continuous wave regime and one scenario PAM regime, both...
In this work, we studied the behavior of Sagnac interferometer powered by a CW signal and under nonlinear effects self-phase modulation, cross-phase Raman, in two configurations (balanced unbalanced) five scenarios (by varying value Raman fraction). balanced configuration, observed that presence effect loop changes curves transmissivity reflectivity device, but only components generated (Stokes waves) are switched to transmitted port. unbalanced obtained an oscillating as for reflectivity,...
Simulating the propagation of optical pulses in a single mode fiber is fundamental importance for studying several effects that may occur within such medium when it under some linear and nonlinear effects. In this work, we simulate by implementing Schrödinger equation using Split-Step Fourier method its approaches. Then, compare their running time, algorithm complexity accuracy regarding energy conservation pulse. We note simple to implement presents good results conservation, besides low...
In this work, we investigated the optical switching process for three shapes of femtosecond pulses (soliton, Gaussian and super-Gaussian) propagating inside a symmetrical dual-core non-linear directional coupler by simulating their propagation via coupled Schrödinger equations. all simulations, considered dispersive effects second third order, besides self-phase modulation self-steepening effects. We studied scenarios each pulse under investigation. first scenario, added only cross-phase...
Neste trabalho, o método FDTD (diferenças finitas no domínio do tempo) foi usado para modelar numericamente a propagação de um pulso quasi-soliton em uma fibra padrão sob efeito apenas GVD (Dispersão velocidade grupo), obtendo-se, assim, solução numérica equação óptica monomodo. Foi descrito detalhes esquema funcionamento e modo como ele adaptado solução. Após implementação numérica, possível verificar diversas propriedades físicas, tais lei conservação energia, dispersão (alargamento...
The use of Wireless Mesh Networks has growing in areas without telecommunication infrastructure. One the main problems is network performance due to low capacity processors used intermediary mesh nodes. We propose a hardware implementation IP Checksum incremental update FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuits). Then, this compared with kernel Linux TCP/IP implementation.
The teaching of Physics in Brazil has not yet been able to make a real connection between what is seen classroom and the daily life students.This work aims analyze feasibility using robotic platform learning concepts about Waves, having an Arduino board as support.We apply theories constructivism (Jean Piaget) constructionism (Seymour Papert) with premises educational robotics basis for this work.The activities were carried out Federal Institute Education, Science Technology Ceará, classes...