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A hybrid WDM and SAC/Optical CDMA System is proposed to enhance the data network security and to exploit the capacity of an optical system. Code pulses of SAC/Optical CDMA are overlaid onto a multichannel WDM system. Modified Quadratic Congruence (MQC) code is as the signature address code for SAC/Optical CDMA. In general, OCDMA improves service availability for data of a network. With the use of...
A successive interference cancellation optical (O-CDMA) system with spectral amplitude coding is investigated. It has been shown that SIC/SAC scheme has potential to suppress MAI, and improve the system performance as compared with conventional receiver.
A 1310/1490/1550 nm wavelength demultiplexer consiss of two-dimensional photonic crystal is proposed. The system consists of three filters to separate the three wavelength into three different output channels. Filter 1 and 3 use circular defect scatterer and filter 2 use square defect scatterers. Square defect scatterers can increase the power transfer inside filter 2 when wavelength 1310 nm propagates...
In this paper we describe the performance of the Multiplexer/Demultiplexer (MUX/DEMUX) in the Dense Wavelength Division Multiplexer (DWDM) technology based on arrayed waveguide grating (AWG). The accumulated crosstalk in large-scale AWG solved by the cascade-connection of small AWGs. We propose two branches of 64 channels each have two stages of AWG cascaded as second and third stages. We introduce...
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