2019/10/09 by Mengxi Tan, Xingyuan Xu, David Moss +9 · 1 citation
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Advanced Photonic Communication Systems #Electronic engineering #Engineering #Microwave #Optics #Photonic and Optical Devices #Photonics #Physics #Quantum mechanics #eess.SP #physics.app-ph #physics.optics
paper · pdf · doi:10.1109/jlt.2019.2946606
published as IEEE Journal of Lightwave Technology, Volume 37, (2019) · 12 pages, 7 figures, 61 references
arxiv created 2019/10/09 · openalex publication_date 2019/10/10 · arxiv updated 2019/10/15 · openalex created_date 2019/10/18 · openalex updated_date 2026/08/05
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.