High-coherence parallelization in integrated photonics

Xuguang Zhang, Zixuan Zhou, Yijun Guo, Minxue Zhuang, Warren Jin, Bitao Shen, Yujun Chen, Jiahui Huang, Zihan Tao, Ming Jin, Ruixuan Chen, Zhangfeng Ge, Zhou Fang, Ning Zhang, Yadong Liu, Pengfei Cai, Weiwei Hu, Haowen Shu, Dong Pan, John E. Bowers (), Xingjun Wang () and Lin Chang ()
Additional contact information
Xuguang Zhang: Peking University
Zixuan Zhou: Peking University
Yijun Guo: Peking University
Minxue Zhuang: Peking University
Warren Jin: University of California Santa Barbara
Bitao Shen: Peking University
Yujun Chen: Peking University
Jiahui Huang: Peking University
Zihan Tao: Peking University
Ming Jin: Peking University
Ruixuan Chen: Peking University
Zhangfeng Ge: Peking University Yangtze Delta Institute of Optoelectronics
Zhou Fang: SiFotonics Technologies Co., Ltd.
Ning Zhang: SiFotonics Technologies Co., Ltd.
Yadong Liu: SiFotonics Technologies Co., Ltd.
Pengfei Cai: SiFotonics Technologies Co., Ltd.
Weiwei Hu: Peking University
Haowen Shu: Peking University
Dong Pan: SiFotonics Technologies Co., Ltd.
John E. Bowers: University of California Santa Barbara
Xingjun Wang: Peking University
Lin Chang: Peking University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Coherent optics has profoundly impacted diverse applications ranging from communications, LiDAR to quantum computations. However, developing coherent systems in integrated photonics comes at great expense in hardware integration and energy efficiency. Here we demonstrate a high-coherence parallelization strategy for advanced integrated coherent systems at minimal cost. By using a self-injection locked microcomb to injection lock distributed feedback lasers, we achieve a record high on-chip gain of 60 dB with no degradation in coherence. This strategy enables highly coherent channels with linewidths down to 10 Hz and power over 20 dBm. The overall electrical-to-optical efficiency reaches 19%, comparable to that of advanced semiconductor lasers. This method supports a silicon photonic communication link with an unprecedented data rate beyond 60 Tbit/s and reduces phase-related DSP consumption by 99.99999% compared to traditional III-V laser pump schemes. This work paves the way for realizing scalable, high-performance coherent integrated photonic systems, potentially benefiting numerous applications.

Date: 2024
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DOI: 10.1038/s41467-024-52269-7

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