Microcomb-driven silicon photonic systems

Haowen Shu, Lin Chang, Yuansheng Tao, Bitao Shen, Weiqiang Xie, Ming Jin, Andrew Netherton, Zihan Tao, Xuguang Zhang, Ruixuan Chen, Bowen Bai, Jun Qin, Shaohua Yu, Xingjun Wang () and John E. Bowers ()
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Haowen Shu: Peking University
Lin Chang: University of California Santa Barbara
Yuansheng Tao: Peking University
Bitao Shen: Peking University
Weiqiang Xie: University of California Santa Barbara
Ming Jin: Peking University
Andrew Netherton: University of California Santa Barbara
Zihan Tao: Peking University
Xuguang Zhang: Peking University
Ruixuan Chen: Peking University
Bowen Bai: Peking University
Jun Qin: Peking University
Shaohua Yu: Peking University
Xingjun Wang: Peking University
John E. Bowers: University of California Santa Barbara

Nature, 2022, vol. 605, issue 7910, 457-463

Abstract: Abstract Microcombs have sparked a surge of applications over the past decade, ranging from optical communications to metrology1–4. Despite their diverse deployment, most microcomb-based systems rely on a large amount of bulky elements and equipment to fulfil their desired functions, which is complicated, expensive and power consuming. By contrast, foundry-based silicon photonics (SiPh) has had remarkable success in providing versatile functionality in a scalable and low-cost manner5–7, but its available chip-based light sources lack the capacity for parallelization, which limits the scope of SiPh applications. Here we combine these two technologies by using a power-efficient and operationally simple aluminium-gallium-arsenide-on-insulator microcomb source to drive complementary metal–oxide–semiconductor SiPh engines. We present two important chip-scale photonic systems for optical data transmission and microwave photonics, respectively. A microcomb-based integrated photonic data link is demonstrated, based on a pulse-amplitude four-level modulation scheme with a two-terabit-per-second aggregate rate, and a highly reconfigurable microwave photonic filter with a high level of integration is constructed using a time-stretch approach. Such synergy of a microcomb and SiPh integrated components is an essential step towards the next generation of fully integrated photonic systems.

Date: 2022
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DOI: 10.1038/s41586-022-04579-3

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