We propose and demonstrate reconfigurable fractional microwave signal processing based on an integrated Kerr optical microcomb. We achieve two forms of microwave signal processing functions, a fractional Hilbert transform as well as a fractional differentiator. For the Hilbert transform we demonstrate a phase shift of 45 degrees, half that of a full Hilbert transform, while for the differentiator we achieve square-root differentiation. For both, we achieve high resolution over a broad bandwidth of 17 GHz with a phase deviation of less than 5 per degree within the achieved passband. This performance in both the frequency and time domains demonstrates the versatility and power of micro-combs as a basis for high performance microwave signal processing.
@article{arxiv.2008.11028,
title = {Reconfigurable fractional microwave signal processor based on a microcomb},
author = {Mengxi Tan and Xingyuan Xu and Jiayang Wu and Thach G. Nguyen and Sai T. Chu and Brent E. Little and Roberto Morandotti and Arnan Mitchell and David J. Moss},
journal= {arXiv preprint arXiv:2008.11028},
year = {2020}
}
Comments
4 pages 5 figures, 32 references. arXiv admin note: text overlap with arXiv:1903.08541, arXiv:1904.00998