Multi-functional microwave photonic circuit based on thin film lithium niobate platform

Weichao Ma; Ruixuan Wang; Jianwei Liu; Chenyu Liu; Wangzhe Li

doi:10.1117/12.3008119

21 December 2023 Multi-functional microwave photonic circuit based on thin film lithium niobate platform

Weichao Ma, Ruixuan Wang, Jianwei Liu, Chenyu Liu, Wangzhe Li

Author Affiliations +

Proceedings Volume 12966, AOPC 2023: AI in Optics and Photonics ; 129662B (2023) https://doi.org/10.1117/12.3008119
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

A multi-functional microwave photonic circuit with meshed architecture is designed and demonstrated on thin film lithium niobate platform. Taking the advantages of the fast response of the Pockels effect and optimized device design, the operation bandwidth of the chip exceeds 60GHz. By controlling the transmission paths of the photon at each node, the on-chip device resources are configurated as a variety of microwave links, corresponding to different signal processing functions. The capabilities of signal generation, down-conversion mixing with high dynamic range and self-interference cancellation with high suppression ratio are experimentally demonstrated. For signal generation, the chip can be regarded as a frequency doubler, and both linear and nonlinear frequency modulated waveforms are obtained with a time-bandwidth product of 2×10⁵ and an in-band spurious suppression ratio higher than 40dB. When configurated as a mixer, the chip achieves a spurious free dynamic range of 105 dB/Hz2/3 and a down-conversion efficiency of -7.4dB. The lithium niobate avoids the nonlinear carrier transportation and absorption existing in traditional silicon photonics, breaking the limitation of linearity and efficiency. As self-interference cancellation mode is set, the interference is suppressed by 50dB over 1.1GHz span. The uniformity of microfabrication in combination with the precise adjustment of the amplitude and phase of the optical field guarantees the high cancellation ratio. To the best of our knowledge, this photonic chip possesses the largest bandwidth and excellent comprehensive performance in terms of active signal processing among integrated multifunctional microwave photonic circuits.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Weichao Ma, Ruixuan Wang, Jianwei Liu, Chenyu Liu, and Wangzhe Li "Multi-functional microwave photonic circuit based on thin film lithium niobate platform", Proc. SPIE 12966, AOPC 2023: AI in Optics and Photonics , 129662B (21 December 2023); https://doi.org/10.1117/12.3008119

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KEYWORDS

Microwave photonics

Lithium niobate

Signal processing

Photonic integrated circuits

High speed photonics

Photonic devices

RF photonics

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