Working Paper Article Version 1 This version is not peer-reviewed

Photonic Radio Frequency and Microwave Channelizer with 90 Channels Based on a Kerr Microcomb

Version 1 : Received: 23 March 2020 / Approved: 26 March 2020 / Online: 26 March 2020 (02:19:45 CET)

How to cite: Xu, X.; tan, M.; Wu, J.; Boes, A.; Nguyen, T.G.; Chu, S.T.; Little, B.E.; Morandotti, R.; Mitchell, A.; Moss, D.J. Photonic Radio Frequency and Microwave Channelizer with 90 Channels Based on a Kerr Microcomb. Preprints 2020, 2020030380 Xu, X.; tan, M.; Wu, J.; Boes, A.; Nguyen, T.G.; Chu, S.T.; Little, B.E.; Morandotti, R.; Mitchell, A.; Moss, D.J. Photonic Radio Frequency and Microwave Channelizer with 90 Channels Based on a Kerr Microcomb. Preprints 2020, 2020030380

Abstract

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.

Subject Areas

microwave photonic; signal channelization; integrated optical frequency comb

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