High performance RF filters via bandwidth scaling with Kerr micro-combs

By Xingyuan Xu, Mengxi Tan, Jiayang Wu, Thach G. Nguyen, Sai T. Chu, Brent E. Little, Roberto Morandotti, Arnan Mitchell, David J. Moss. APL Photonics, 2019

215 citations recorded by the source corpus.

We demonstrate high-resolution photonic RF filters using an RF bandwidth scaling approach based on integrated Kerr optical micro-combs. By employing both an active nonlinear micro-ring resonator (MRR) as a high-quality micro-comb source and a passive high-Q MRR to slice the RF spectra modulated on the shaped comb, a large RF instantaneous bandwidth of 4.64 GHz and a high resolution of 117 MHz are achieved, together with a broad RF operation band covering 3.28-19.4 GHz (L to Ku bands) using thermal tuning. We achieve programmable RF transfer functions including binary-coded notch filters and RF equalizing filters with reconfigurable slopes. Our approach is an attractive solution for RF spectral shaping with high performance and flexibility.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/920d4e8a0e968a356945697aaa1d2ff1849cc45e

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In Atomic and Molecular Physics, and Optics

In Electrical and Electronic Engineering

Citations in the corpus

Photonic RF Phase-Encoded Signal Generation With a Microcomb Source (2020, background): “micro-combs, such transversal filters [25]–[27], differentiators [28], optical true time delays [29], [30] and channelizers [31],”
Photonic RF Arbitrary Waveform Generator Based on a Soliton Crystal Micro-Comb Source (2020, background): “tions [25]–[33], such as optical true time delays [25], transversal filters [26]–[28], signal processors [29]–[31], channelizers [34], [35], and phase-encoded signal generators [33].”
Photonic RF and microwave filters based on 49 GHz and 200 GHz Kerr microcombs (2020, methodology): “nic signal processors. In order to improve on this, we demonstrated micro-comb-based photonic RF transversal filter s with record high numbers of taps, featuring up to 80 wavelengths over the C -band [115,118,122,126]. This is the highest number of wavelengths so far reported for micro -comb-based R”
Microcomb-Based Photonic RF Signal Processing (2019, methodology): “Photonic RF channelizers are another important microcomb application [30], [31].”