Архив статей журнала
This research paper introduces an advanced optical transmission technology for 5G+ networks that uses high-order quadrature amplitude modulation (QAM) to improve data delivery.
The system uses coherent optical transmission, dual-polarization, advanced DSP algorithms, and FEC to achieve great spectral efficiency, signal integrity, and resistance against optical defects at 16Tbit/s per channel across 200 kilometers. This study shows that high-order QAM can address future connectivity needs and advances optical network development for 5G and beyond. Based on the system developed by the author with a speed of 1 Tbit/s and the application of the Il’in-Morozov’s method, the presented system can be modernized and simplified in its structure, brought to the speeds indicated above due to stream aggregation.
The versatility of optical frequency combs in test and measurement has grown. Spectroscopy,
metrology, precision distance measuring, sensing, optical and microwave waveform synthesis, signal processing, and communications are examples. Bandwidth optimization is crucial. Our unique and simple method for C-band millimeter-wave double-sideband vector signal creation was tested. This approach cascades one single-drive and one push-pull Mach-Zehnder modulator. After driving the first one with a 2, 4, 8, 16, 32, 64 GHz RF pulse, an optical frequency comb with six flat carriers was formed.
The outputs were evaluated after each of the five stages following careful tuning to meet optical system harmonics. Multiple frequencies can be sent in one channel, making this architecture adaptable and scalable. For the suggested approach, experimental results match theoretical and simulation assessments.