Microwave and RF Photonic Fractional Hilbert Transformer Based on a 50 GHz Kerr Micro-Comb

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

5 Scopus Citations
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Author(s)

  • Mengxi Tan
  • Xingyuan Xu
  • Bill Corcoran
  • Jiayang Wu
  • Andreas Boes
  • Thach G. Nguyen
  • Brent E. Little
  • Roberto Morandotti
  • Arnan Mitchell
  • David J. Moss

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number8864019
Pages (from-to)6097-6104
Journal / PublicationJournal of Lightwave Technology
Volume37
Issue number24
Online published10 Oct 2019
Publication statusPublished - 15 Dec 2019

Abstract

We report a photonic microwave and radio frequency (RF) fractional Hilbert transformer based on an integrated Kerr micro-comb source. The micro-comb source has a free spectral range (FSR) of 50 GHz, generating a large number of comb lines that serve as a high-performance multi-wavelength source for the transformer. By programming and shaping the comb lines according to calculated tap weights, we achieve both arbitrary fractional orders and a broad operation bandwidth. We experimentally characterize the RF amplitude and phase response for different fractional orders and perform system demonstrations of real-time fractional Hilbert transforms. We achieve a phase ripple of <0.15 rad within the 3-dB pass-band, with bandwidths ranging from 5 to 9 octaves depending on the order. The experimental results show good agreement with theory, confirming the effectiveness of our approach as a new way to implement high-performance fractional Hilbert transformers with broad processing bandwidth, high reconfigurability, and greatly reduced size and complexity.

Research Area(s)

  • All-optical signal processing, Hilbert transform, integrated optics, Kerr frequency comb

Citation Format(s)

Microwave and RF Photonic Fractional Hilbert Transformer Based on a 50 GHz Kerr Micro-Comb. / Tan, Mengxi; Xu, Xingyuan; Corcoran, Bill; Wu, Jiayang; Boes, Andreas; Nguyen, Thach G.; Chu, Sai T.; Little, Brent E.; Morandotti, Roberto; Mitchell, Arnan; Moss, David J.

In: Journal of Lightwave Technology, Vol. 37, No. 24, 8864019, 15.12.2019, p. 6097-6104.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal