KEYWORDS: Optical transmission, Modulation, Digital signal processing, Signal detection, Distortion, Tunable filters, Receivers, Transmitters, Single mode fibers, Signal processing
In this paper, we experimentally demonstrated the transmission of 112 Gb/s PAM-4 and PAM-6 signals over standard single-mode fibers for 2 km and 10 km based on a 30GHz-EML. We have used three algorithms, of which MLSE has best BER performance. In consideration of algorithm complexity, FFE is cascaded before MLSE. For PAM-4 signal, the sensitivity is improved by 1 dB when using MLSE compared to FFE.
Silicon waveguides are particularly appealing for the implementation of all-optical (AO) signal processing devices and switches due to the improved fabrication technology of silicon. Therefore, a silicon-on-silica waveguide is employed as the building block for simulating fundamental AO logic operations, including XOR, AND, OR, NOT, NOR, NAND, and XNOR, at 1.33-μm telecommunications wavelength. The proposed waveguide consists of two microring resonators and three strip waveguides. The operation concept of these logic gates relies on the constructive and destructive interference that results from the phase difference induced by incident optical beams. The performance of the target logic gates is assessed against the contrast ratio (CR) metric. The simulation results suggest that, by exploiting the proposed waveguides, these gates can operate with higher CR and faster speed compared to other designs.
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