Broadband photonic RF channelizer with 92 channels based on a soliton crystal microcomb

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

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)


We report a broadband radio frequency (RF) channelizer with up to 92 channels using a coherent microcomb source. A soliton crystal microcomb, generated by a 49 GHz micro-ring resonator (MRR), is used as a multi-wavelength source. Due to its ultra-low comb spacing, up to 92 wavelengths are available in the C band, yielding a broad operation bandwidth. Another high-Q MRR is employed as a passive optical periodic filter to slice the RF spectrum with a high resolution of 121.4 MHz. We experimentally achieve an instantaneous RF operation bandwidth of 8.08 GHz and verify RF channelization up to 17.55 GHz via thermal tuning. Our approach is a significant step towards the monolithically integrated photonic RF receivers with reduced complexity, size, and unprecedented performance, which is important for wide RF applications ranging from broadband analog signal processing to digital-compatible signal detection.

Original languageEnglish
Pages (from-to)5116-5121
Number of pages6
JournalJournal of Lightwave Technology
Issue number18
Publication statusPublished - 15 Sep 2020


  • Integrated optical frequency comb
  • Microwave photonic
  • signal channelization

Cite this