Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Design and Performance Analysis of Microwave Photonic Spectral Domain Filters Using Optical Microcombs

Version 1 : Received: 28 June 2023 / Approved: 28 June 2023 / Online: 28 June 2023 (09:30:53 CEST)

How to cite: Moss, D. Design and Performance Analysis of Microwave Photonic Spectral Domain Filters Using Optical Microcombs. Preprints 2023, 2023061976. https://doi.org/10.20944/preprints202306.1976.v1 Moss, D. Design and Performance Analysis of Microwave Photonic Spectral Domain Filters Using Optical Microcombs. Preprints 2023, 2023061976. https://doi.org/10.20944/preprints202306.1976.v1

Abstract

Microwave transversal filters, which are implemented based on the transversal filter structure in digital signal processing, offer a high reconfigurability for achieving a variety of signal processing functions without changing hardware. When implemented using microwave photonic (MWP) technologies, also known as MWP transversal filters, they provide competitive advantages over their electrical counterparts, such as low loss, large operation bandwidth, and strong immunity to electromagnetic interference. Recent advances in high-performance optical microcombs provide compact and powerful multi-wavelength sources for MWP transversal filters that require a larger number of wavelength channels to achieve high performance, allowing for the demonstration of a diverse range of filter functions with improved performance and new features. Here, we present a comprehensive performance analysis for microcomb-based MWP spectral filters based on the transversal filter approach. First, we investigate the theoretical limitations in the filter spectral response induced by finite tap numbers. Next, we analyze the distortions in the filter spectral response resulting from experimental error sources. Finally, we assess the influence of input signal’s bandwidth on the filtering errors. These results provide a valuable guide for the design and optimization of microcomb-based MWP transversal filters for a variety of applications.

Keywords

Microwave photonics; optical microcombs; optical signal processing

Subject

Physical Sciences, Optics and Photonics

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