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In this paper, a multi-wavelength optical code-division multiple-access scheme that involves cascading two arrayed waveguide grating (AWG) routers is proposed. The proposed cascaded AWG scheme can be used to obtain the time-varying-crosstalk-induced beat noise depending on the network transmission state. The crosstalk information can be obtained immediately and applied to adjust the threshold by setting...
We propose a new scheme in optical code-division multiple-access (OCDMA) system by using liquid crystal (LC) Spatial Light Modulators (SLMs) with programmable bipolar codes. The key to the system performance depends on constructing a decoder that implements a true bipolar correlation using only unipolar signals and intensity detection. In our optical access coding system, the power spectrum is coded...
A compact optical code-division multiple-access (OCDMA) network coder-decoder (codec) with a crosstalk reduction mechanism is proposed. The transmitter-receiver codec is constructed using cascaded dual arrayed-waveguide gratings (AWGs) that generate a pure crosstalk term, referred to in this paper as a pilot signal. The pilot signal is multiplied by an appropriate gain such that its intensity is equal...
A spectral-amplitude coding optical code-division multiple-access (SAC-OCDMA) system with four-level intensities and polarization-division-multiplexing (PDM) is presented. Each encoder/decoder pair is shared by two subscribers in such a network. However, phase-induced intensity noise (PIIN) induced by high intensities deteriorates the system performance. To suppress PIIN, users sharing the same encoder...
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