Zhang Xuguang, Zhou Zixuan, Guo Yijun, Zhuang Minxue, Jin Warren, Shen Bitao, Chen Yujun, Huang Jiahui, Tao Zihan, Jin Ming, Chen Ruixuan, Ge Zhangfeng, Fang Zhou, Zhang Ning, Liu Yadong, Cai Pengfei, Hu Weiwei, Shu Haowen, Pan Dong, Bowers John E, Wang Xingjun, Chang Lin
State Key Laboratory of Advanced Optical Communications System and Networks, School of Electronics, Peking University, Beijing, China.
Department of Electrical and Computer Engineering, University of California Santa Barbara, Santa Barbara, CA, USA.
Nat Commun. 2024 Sep 10;15(1):7892. doi: 10.1038/s41467-024-52269-7.
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.
相干光学对从通信、激光雷达到量子计算等各种应用产生了深远影响。然而，在集成光子学中开发相干系统在硬件集成和能源效率方面成本高昂。在此，我们展示了一种以最低成本实现先进集成相干系统的高相干并行化策略。通过使用自注入锁定微梳来注入锁定分布反馈激光器，我们实现了创纪录的60 dB片上增益，且相干性无退化。该策略能够实现线宽低至10 Hz且功率超过20 dBm的高相干通道。整体电光效率达到19%，与先进半导体激光器相当。此方法支持前所未有的超过60 Tbit/s的数据速率的硅光子通信链路，与传统的III-V族激光泵浦方案相比，将与相位相关的数字信号处理功耗降低了99.99999%。这项工作为实现可扩展的高性能相干集成光子系统铺平了道路，有望惠及众多应用。
