期刊
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
卷 67, 期 12, 页码 3582-3586出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCSII.2020.2995682
关键词
Radio frequency; Photonics; RF signals; Optical fibers; Solitons; Optical resonators; Bandwidth; Integrator; Kerr micro-comb; RF signal processing
资金
- Australian Research Council (ARC) [DP150104327]
- ARC [DP190102773]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB24030000]
- Natural Sciences and Engineering Research Council of Canada
- MESI PSR-SIIRI Initiative in Quebec
- Canada Research Chair Program
We demonstrate a photonic RF integrator based on an integrated soliton crystal micro-comb source. By multicasting and progressively delaying the input RF signal using a transversal structure, the input RF signal is integrated discretely. Up to 81 wavelengths are provided by the microcomb source, which enable a large time-bandwidth product of 81. Our approach also features a high degree of reconfigurability. By simply adjusting the value of dispersion (i.e., the length of dispersive fibre), the integration time window and resolution can be reconfigured to accommodate a diverse range of applications. We employed 13 km of standard single-mode fibre to achieve a large integration time window of similar to 6.8 ns, a time resolution as fast as similar to 84 ps, with a broad bandwidth of 11.9 GHz. In addition, we perform signal integration of a diverse range of input RF signals including Gaussian pulses with varying time widths, dual pulses with varying time intervals and a square waveform. The experimental results show good agreement with theory. These results verify our microcomb-based integrator as a competitive approach for RF signal integration with high performance and potentially lower cost and footprint.
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