Encontrados 2 documentos, a visualizar página 1 de 1
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...
Conversão de Comprimento de Onda Baseado em Four Wave Mixing
Francisco A. S. Couto; Rogério N. Nogueira; Paulo S. André; António L. TeixeiraAll-optical wavelength conversion is one of the major research topics in the optical networks area..Problems due to electrical conversion can be easily eliminated, such as thermic noise; its transparency to the shape of the signal and to the bit rate, makes this type of conversion an attractive solution.The ‘Four Wave Mixing’(FWM) process is one of these allopticaltechniques. The...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||