Broadband microwave frequency conversion based on an integrated optical micro-comb source

Xingyuan Xu, Jiayang Wu, Mengxi Tan, Thach G. Nguyen, Sai T. Chu, Brent E. Little, Roberto Morandotti, Arnan Mitchell, David J. Moss

Research output: Contribution to journalArticleResearchpeer-review

9 Citations (Scopus)


We report a broadband microwave frequency converter based on a coherent Kerr optical micro-comb generated by an integrated micro-ring resonator. The coherent micro-comb displays features that are consistent with soliton crystal dynamics with a free spectral range of 48.9 GHz. We use this to demonstrate a high-performance millimeter-wave local oscillator for microwave frequency conversion. We experimentally verify the microwave performance up to 40 GHz, achieving a ratio of-6.8 dB between output radio frequency power and intermediate frequency power and a spurious suppression ratio of >43.5 dB. The experimental results show good agreement with theory and verify the effectiveness of microwave frequency converters based on coherent optical micro-combs, with the ability to achieve reduced size, complexity, and potential cost.

Original languageEnglish
Pages (from-to)332-338
Number of pages7
JournalJournal of Lightwave Technology
Issue number2
Publication statusPublished - 15 Jan 2020
Externally publishedYes


  • Kerr optical comb
  • microwave frequency converters
  • microwave photonics

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