Programmable multifunctional integrated microwave photonic circuit on thin-film lithium niobate

Chuangchuang Wei, Hanke Feng, Kaixuan Ye, Maarten Eijkel, Yvan Klaver, Zhaoxi Chen, Akshay Keloth, Cheng Wang () and David Marpaung ()
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Chuangchuang Wei: University of Twente
Hanke Feng: City University of Hong Kong
Kaixuan Ye: University of Twente
Maarten Eijkel: University of Twente
Yvan Klaver: University of Twente
Zhaoxi Chen: City University of Hong Kong
Akshay Keloth: University of Twente
Cheng Wang: City University of Hong Kong
David Marpaung: University of Twente

Nature Communications, 2025, vol. 16, issue 1, 1-8

Abstract: Abstract Microwave photonics, with its advanced high-frequency signal processing capabilities, is expected to play a crucial role in next-generation wireless communications and radar systems. The realization of highly integrated, high-performance, and multifunctional microwave photonic links will pave the way for its widespread deployment in practical applications, which is a significant challenge. Here, leveraging thin-film lithium niobate intensity modulator and programmable cascaded microring resonators, we demonstrate a tunable microwave photonic notch filter that simultaneously achieves high level of integration along with high dynamic range, high link gain, low noise figure, and ultra-high rejection ratio. Additionally, this programmable on-chip system is multifunctional, allowing for the dual-band notch filter and the suppression of the high-power interference signal. This work demonstrates the potential applications of the thin-film lithium niobate platform in the field of high-performance integrated microwave photonic filtering and signal processing, facilitating the advancement of microwave photonic system towards practical applications.

Date: 2025
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DOI: 10.1038/s41467-025-57441-1

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