KEYWORDS: Analog electronics, Tunable filters, Signal processing, Machine learning, Dispersion, Resonators, Radio optics, Photonic integrated circuits, Mathematical optimization, Radio over Fiber
We introduce an ML-driven optical signal processor for dispersion compensation in B5G RAN. This approach leverages a reconfigurable, energy-efficient MRR structure, effectively mitigating power fading. Our study exploits M-QAM digitally up-converted A-IFoF transmission simulation results to fiber distances up to 25km to prove the capabilities of the designed machine learning-based analog photonic processing unit. Analytical MATLAB calculations show enhanced output power, corroborated by VPI simulations demonstrating improved EVM values, including 16.9% EVM for 1GBd QPSK at 8.5GHz over 25km, meeting the 3GPP standards.
A novel transmitter implementation, which will be capable of operating in both classical and quantum light regimes since it will be able to send single photons across a quantum channel and at the same time to serve as analog RoF transmitter currently deployed in X-haul topologies, is proposed. By spectrally isolating the sidebands of analog RoF signal and by controlling the EML’s modulation index, different mean photon numbers launched in one sideband can be obtained. We report on the architecture of our proposed transmitter station, and we demonstrate its operation through proof-of-concept experiments by performing successful RoF transmission links and by carrying out photon-counting measurements. The transmission of 200 Mbaud QPSK-modulated signal with acceptable EVM measurements of < 17.5%, as well the variation of the mean count rate of the filtered sideband as a function of the peak-to-peak driving voltage of radio signal at 28GHz were successfully performed, confirming that the sidebands of A-RoF transceivers can be used as single-photon carriers for quantum information.
KEYWORDS: Antennas, Modulation, Analog electronics, Single mode fibers, Avalanche photodetectors, Wireless communications, Radio over Fiber, Radio optics, Clocks, Signal to noise ratio
An IFoF/V-band link is experimentally presented in a 100MBd QPSK downlink transmission across 7km fiber by a high-power EML and over-the-air by 60GHz beamforming antenna with 32-radiating elements, comprising the first demonstration of a cost-effective end-to-end directional Fiber-Wireless link for dense 5G millimeter-wave networks.
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