RF photonics: an optical microcombs' perspective

J Wu, X Xu, TG Nguyen, ST Chu… - IEEE Journal of …, 2018 - ieeexplore.ieee.org
Over the past decade, optical frequency combs generated by high-Q microresonators, or
optical microcombs, which feature compact device footprints, low power consumption, and …

Broadband RF channelizer based on an integrated optical frequency Kerr comb source

X Xu, J Wu, TG Nguyen, ST Chu, BE Little… - Journal of Lightwave …, 2018 - opg.optica.org
We report a broadband RF channelizer based on an integrated optical frequency Kerr micro-
comb source, with an RF channelizing bandwidth of 90 GHz, a high RF spectral slice …

Orthogonally polarized RF optical single sideband generation and dual-channel equalization based on an integrated microring resonator

X Xu, J Wu, M Tan, TG Nguyen, ST Chu… - Journal of Lightwave …, 2018 - opg.optica.org
We demonstrate narrowband orthogonally polarized optical radio frequency (RF) single
sideband generation as well as dual-channel equalization based on an integrated dual …

Continuously tunable orthogonally polarized RF optical single sideband generator based on micro-ring resonators

X Xu, J Wu, L Jia, M Tan, TG Nguyen, ST Chu… - Journal of …, 2018 - iopscience.iop.org
We demonstrate a continuously RF tunable orthogonally polarized optical single sideband
(OP-OSSB) generator based on dual cascaded micro-ring resonators (MRRs). By splitting …

[HTML][HTML] Invited Article: Enhanced four-wave mixing in waveguides integrated with graphene oxide

Y Yang, J Wu, X Xu, Y Liang, ST Chu, BE Little… - APL Photonics, 2018 - pubs.aip.org
We demonstrate enhanced four-wave mixing (FWM) in doped silica waveguides integrated
with graphene oxide (GO) layers. Owing to strong mode overlap between the integrated …

Microcomb-based true-time-delay network for microwave beamforming with arbitrary beam pattern control

X Xue, Y Xuan, C Bao, S Li, X Zheng… - Journal of lightwave …, 2018 - ieeexplore.ieee.org
Microwave phased array antennas (PAAs) are very attractive to defense applications and
high-speed wireless communications for their abilities of fast beam scanning and complex …

Microresonator frequency combs for integrated microwave photonics

X Xue, X Zheng, B Zhou… - IEEE Photonics …, 2018 - ieeexplore.ieee.org
Microresonator-based Kerr frequency combs (microcombs) have many outstanding features,
including chip-level integration, high repetition rate, and ultrabroad bandwidth. These merits …

Emerging applications of integrated optical microcombs for analogue RF and microwave photonic signal processing

X Xu, J Wu, ST Chu, BE Little, R Morandotti… - arXiv preprint arXiv …, 2018 - arxiv.org
We review new applications of integrated microcombs in RF and microwave photonic
systems. We demonstrate a wide range of powerful functions including a photonic intensity …

Graphene oxide for enhanced nonlinear optics in low and high index contrast waveguides and nanowires

Y Yang, J Wu, X Xu, Y Liang, ST Chu, BE Little… - arXiv preprint arXiv …, 2018 - arxiv.org
We demonstrate enhanced four-wave mixing (FWM) in doped silica waveguides integrated
with graphene oxide (GO) layers. Owing to strong mode overlap between the integrated …

Photonic single sideband RF generator based on an integrated optical micro-ring resonator

X Xu, J Wu, M Tan, TG Nguyen, ST Chu… - arXiv preprint arXiv …, 2018 - arxiv.org
We demonstrate narrowband orthogonally polarized optical RF single sideband generation
as well as dual-channel equalization based on an integrated dual-polarization-mode high-Q …