Theory for the Accuracy of Microcomb Photonic Microwave Transversal Signal Processors

Abstract

Photonic RF transversal signal processors, which are equivalent to reconfigurable electrical digital signal processors but implemented with photonic technologies, have been widely used for modern high-speed information processing. With the capability of generating large numbers of wavelength channels with compact micro-resonators, optical microcombs bring new opportunities for realizing photonic RF transversal signal processors that have greatly reduced size, power consumption, and complexity. Recently, a variety of signal processing functions have been demonstrated using microcomb-based photonic RF transversal signal processors. Here, we provide detailed analysis for quantifying the processing accuracy of microcomb-based photonic RF transversal signal processors. First, we investigate the theoretical limitations of the processing accuracy determined by tap number, signal bandwidth, and pulse waveform. Next, we discuss the practical error sources from different components of the signal processors. Finally, we analyze the contributions of the theoretical limitations and the experimental factors to the overall processing inaccuracy both theoretically and experimentally. These results provide a useful guide for designing microcomb-based photonic RF transversal signal processors to optimize their accuracy.

arXiv comment17 pages, 12 figures, 103 references

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Cited by in corpus (4)

• Maximizing the performance for microcomb based microwave photonic transversal signal processors
• Microwave photonic transversal filters based on microcombs with feedback control
• The performance of microwave photonic signal processors based on microcombs with different input signal waveforms
• Contrasting the relative performance of RF photonic transversal signal processors based on microcombs using discrete components versus integrated devices