Discretely programmable microwave photonic filter based on temporal Talbot effects

Maram, Reza; Onori, Daniel; Azaña, José; Chen, Lawrence R.

doi:10.1364/oe.27.014381

Cited by 20 publications

(27 citation statements)

References 29 publications

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“…The automatic PSC control is equivalent to the Talbot-based processer for discrete programming the RF filters in ref. 22 . Less intuitively, all-optical reshaping of the RF filters can also be achieved via versatile TSM spectra (case 3).…”

Section: Resultsmentioning

confidence: 99%

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Reconfigurable radiofrequency filters based on versatile soliton microcombs

Liu

et al. 2020

Nat Commun

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The rapidly maturing integrated Kerr microcombs show significant potential for microwave photonics. Yet, state-of-the-art microcomb-based radiofrequency filters have required programmable pulse shapers, which inevitably increase the system cost, footprint, and complexity. Here, by leveraging the smooth spectral envelope of single solitons, we demonstrate microcomb-based radiofrequency filters free from any additional pulse shaping. More importantly, we achieve all-optical reconfiguration of the radiofrequency filters by exploiting the intrinsically rich soliton configurations. Specifically, we harness the perfect soliton crystals to multiply the comb spacing thereby dividing the filter passband frequencies. Also, the versatile spectral interference patterns of two solitons enable wide reconfigurability of filter passband frequencies, according to their relative azimuthal angles within the round-trip. The proposed schemes demand neither an interferometric setup nor another pulse shaper for filter reconfiguration, providing a simplified synthesis of widely reconfigurable microcombbased radiofrequency filters.

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Section: Resultsmentioning

confidence: 99%

“…Nevertheless, the main complexity is then shifted to the multiwavelength source. Electro-optic (EO) combs 8,19,20 or mode-locked lasers 21,22 are generally adopted as light sources, which remain expensive and bulky options.…”

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confidence: 99%

Reconfigurable radiofrequency filters based on versatile soliton microcombs

Liu

et al. 2020

Nat Commun

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“…This imparts N -times division of the filter passband frequencies, while preserving the filter bandwidth. The automatic PSC control is equivalent to the Talbot-based processer for discrete programming the RF filters in ref 16 . Less intuitively, alloptical reshaping of the RF filters can also be achieved via versatile TSM spectra (case 3).…”

Section: Rf Inmentioning

confidence: 99%

“…Among others, RF filters constructed from tapped delay line (TDL) structures attract great attention. They can be classified into two types 14 , depending on whether the filtering profile is given by the physical path delays 10,13 or the light source spectra [1][2][3]8,9,15,16 . While the former approach is straightforward, a multiwavelength source combined with dispersive propagation also functions as a TDL filter.…”

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Reconfigurable Radiofrequency Photonic Filters Based on Soliton Microcombs

Raja

et al. 2020

Optical Fiber Communication Conference (OFC) 2020

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Performance Analysis of Microwave Photonic Spectral Filters based on Optical Microcombs

Li,

Sun,

et al. 2024

Advanced Physics Research

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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 large operation bandwidth, strong immunity to electromagnetic interference, and low loss when processing signals at high frequencies. 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, a comprehensive performance analysis for microcomb‐based MWP spectral filters based on the transversal filter approach is presented. First, the theoretical limitations are investigated in the filter spectral response induced by finite tap numbers. Next, the distortions are analyzed in the filter spectral response resulting from experimental error sources. Finally, the influence of input signal's bandwidth on the filtering errors is assessed. These results provide a valuable guide for the design and optimization of microcomb‐based MWP transversal filters for a variety of applications.

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Discretely programmable microwave photonic filter based on temporal Talbot effects

Cited by 20 publications

References 29 publications

Reconfigurable radiofrequency filters based on versatile soliton microcombs

Reconfigurable radiofrequency filters based on versatile soliton microcombs

Reconfigurable Radiofrequency Photonic Filters Based on Soliton Microcombs

Performance Analysis of Microwave Photonic Spectral Filters based on Optical Microcombs

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