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Ferramenta de Simulação para Análise Espectral de Redes de Bragg
Rogério P. Dionísio; Mário J. Lima; J. R. Ferreira da Rocha; J. L. Pinto; António J. TeixeiraFiber Bragg gratings are becoming important components for optical communication networks, allowing many operations to be realized without the need of conversion between electrical and optical domain. This paper presents a simulation and design tool for spectral characterization of Bragg gratings, based on Matlab, together with a graphical user interface created fromGUIDE toolbox, ...
A New Scheme for OCDMA using 2D Codes and Differential Detection
Paulo Santos; Rogério N. Nogueira; Paulo André; J. R. Ferreira da Rocha; António J. TeixeiraA new optical system with wavelengthencoding/time-spreading Optical Code Division Multiple Access (O-CDMA) is proposed. Using orthogonal polarizations we can have a simple encoding and decoding of two independent channels and achieve differential detection.The resulting system has a constant null decision threshold and therefore a superior performance when compared with a system with di...
Optimization of optical filter bandwidth for the FSK demodulator in combined IM...
Rui Teixeira; António J. Teixeira; P. S. AndréWe report the study and optimization of orthogonal IM/FSK modulation format systems. These combined modulation formats have been proposed recently to optical labeling of high speed IP packets through DWDM networks. Numerical simulation was used to optimize the optical filter bandwidth of FSK demodulator and to obtain the variation of FSK performance with different FSK and IM b...
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