Article
Multidisciplinary Sciences
Anton Lukashchuk, Johann Riemensberger, Maxim Karpov, Junqiu Liu, Tobias J. Kippenberg
Summary: The authors develop a dual-soliton microcomb technique for coherent laser ranging that achieves measurement rates of up to one million pixels per second, overcoming the challenge of photonic integration complexity.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Anton Lukashchuk, Johann Riemensberger, Aleksandr Tusnin, Junqiu Liu, Tobias J. Kippenberg
Summary: We demonstrate the realization of massively parallel random-modulation continuous-wave light detection and ranging using the intrinsic random amplitude and phase modulation of a microresonator frequency comb. This approach eliminates the need for electro-optical modulators or microwave synthesizers. It offers high conversion efficiency, flat optical spectra, and wideband signal modulation without complex laser initiation routines.
Article
Materials Science, Multidisciplinary
Lei Shi, Kai Ma, Xianshun Ming, Qibing Sun, Leiran Wang, Wei Zhao, Wenfu Zhang
Summary: This study demonstrates that the injection-locking scheme can effectively eliminate the temporal drift and repetition rate deviation of soliton caused by complex higher-order effects. The modulation depth plays a key role in suppressing drift, and an experimental guide for adjusting modulation depth is given. This work enriches soliton dynamics under complex higher-order effects and provides a scheme to improve the stability and controllability of microcombs.
RESULTS IN PHYSICS
(2023)
Article
Optics
Anton Lukashchuk, Johann Riemensberger, Anton Stroganov, Gabriele Navickaite, Tobias J. Kippenberg
Summary: The increasing pixel acquisition rates in augmented reality, autonomous driving, and robotics have sparked interest in solid state beam scanning without moving parts. Recent advancements in photonic integrated laser ranging have enabled unprecedented resolution and speed with passive beam steering solutions. However, parallelization of over 100 lasers and detectors, commonly used in commercial time-of-flight sensors, has not been widely adopted for passive scanning approaches. In this study, researchers demonstrated inertia-free and parallel light detection and ranging (LiDAR) using microresonator frequency combs, achieving 2D passive beam steering with random modulation.
Article
Physics, Multidisciplinary
Ke Wang, Jing Li, Fan Dai, Mengshuai Wang, Chuanhang Wang, Qiang Wang, Chenghou Tu, Yongnan Li, Hui-Tian Wang
Summary: The generation of nonlinear frequency combs in chi((3)) optical microresonators has attracted significant research interest. The recent development of microcomb based on chi((2)) optical nonlinearity holds promise for breakthroughs and presents a major scientific challenge. The presence of both second- and third-order nonlinearities results in complex cavity dynamics.
FRONTIERS IN PHYSICS
(2022)
Article
Physics, Multidisciplinary
Yang Wang, Zhichuang Wang, Xinyu Wang, Wen Shao, Long Huang, Bo Liang, Brent E. Little, Sai T. Chu, Wei Zhao, Weiqiang Wang, Wenfu Zhang
Summary: This paper introduces the application of dual-comb spectroscopy (DCS) in molecular spectroscopy and the potential use of the recently developed soliton microcomb (SMC) in the dual-comb method. By using frequency scanning SMCs in scanning dual-microcomb spectroscopy (SDMCS), the researchers successfully performed gas molecule absorption spectroscopy recognition and gas concentration detection. The SDMCS system demonstrated high spectral resolution and fast acquisition rate.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Physics, Applied
Nikita Yu. Dmitriev, Sergey N. Koptyaev, Andrey S. Voloshin, Nikita M. Kondratiev, Kirill N. Min'kov, Valery E. Lobanov, Maxim V. Ryabko, Stanislav V. Polonsky, Igor A. Bilenko
Summary: Dual-comb interferometry is a method that converts the optical spectrum into the radio-frequency domain using self-heterodyning two optical frequency combs. It has diverse applications including metrology, spectroscopy, distance ranging, and optical communications. Current systems rely on scientific equipment and bulky mode-locked lasers, but this study demonstrates a power-efficient dual-microcomb source that is fully integrated and electrically driven, providing a more compact and cost-effective solution.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Multidisciplinary
Runlin Miao, Ke Yin, Chenxi Zhang, Zhuopei Yu, Xiang'ai Cheng, Tian Jiang
Summary: A novel soliton dual-microcomb generation method using rapid frequency sweep and sideband thermal compensation is proposed and successfully demonstrated for generating dual-microcomb optical spectra beyond 200 nm. The demonstrated dual-microcomb shows lower-noise RF beat notes and smaller Allan deviations compared to weakly thermally compensated dual-microcombs by increasing sideband power. The dual-microcomb has also been utilized in gas absorption detection with high signal-to-noise ratios and fast acquisition rates. This work lays a technical foundation for various dual-microcomb applications in ranging and microwave photonics.
FRONTIERS IN PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Rui Niu, Shuai Wan, Jin Li, Ruo-Can Zhao, Chang-Ling Zou, Guang-Can Guo, Chun-Hua Dong
Summary: The study overcame the limitation of large linespacing in soliton comb, improving spectroscopy detection resolution. By locking the pump laser to a reference cavity, a high frequency resolution was achieved. Scanning the microcomb allowed fast measurement of gas absorption spectra and high-Q optical modes.
IEEE PHOTONICS JOURNAL
(2021)
Article
Chemistry, Analytical
Xinpeng Chen, Suwan Sun, Weizhu Ji, Xingxing Ding, You Gao, Tuo Liu, Jianxiang Wen, Hairun Guo, Tingyun Wang
Summary: Researchers have demonstrated a combined technique to access power-sufficient optical microcombs by using a photonic-integrated soliton microcomb and home-developed erbium-doped gain fiber. This method provides sufficient optical power for applications such as telecommunications.
Article
Physics, Multidisciplinary
Xinyu Wang, Peng Xie, Yang Wang, Weiqiang Wang, Leiran Wang, Brent E. Little, Sai Tak Chu, Wei Zhao, Wenfu Zhang
Summary: This study experimentally demonstrates the formation of self-oscillation microcombs in a microresonator and observes the spontaneous symmetry breaking and self-oscillation phenomenon. By tuning the pump detuning, the breathing soliton and stable soliton states can switch to each other, providing a reliable scheme for breather soliton microcomb generation.
FRONTIERS IN PHYSICS
(2022)
Article
Optics
Zhenming He, Junwei Cheng, Xinyu Liu, Bo Wu, Heng Zhou, Jianji Dong, Xinliang Zhang
Summary: The study implemented a car plate recognition task using optical neural networks with high-precision weight matrix and increased computing density with wavelength division multiplexing technology. The optoelectronic computing system showed comparable performance to a 64-bit digital computer for character classification.
Article
Optics
Wenwen Cui, Zheng Yi, Xinyu Ma, Yong Geng, Heng Zhou, Kun Qiu
Summary: In this study, a new microcavity structure was used to improve the output power of soliton combs, and the energy conversion efficiency was significantly higher than previous research results. This has important practical applications in fields such as optical communication and optical frequency combs.
CHINESE OPTICS LETTERS
(2023)
Article
Multidisciplinary Sciences
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, John E. Bowers
Summary: This research combines microcomb and SiPh technologies to achieve a low-cost and efficient integrated photonics system, providing new solutions in the fields of optical data transmission and microwave photonics.
Article
Multidisciplinary Sciences
Bowen Bai, Qipeng Yang, Haowen Shu, Lin Chang, Fenghe Yang, Bitao Shen, Zihan Tao, Jing Wang, Shaofu Xu, Weiqiang Xie, Weiwen Zou, Weiwei Hu, John E. E. Bowers, Xingjun Wang
Summary: In this work, optical convolution is achieved through a time-wavelength plane stretching approach on a microcomb-driven chip-based photonic processing unit. Optical neural networks (ONN) have greatly benefited from parallel convolution-operation technology, which utilizes the dimension of optical wavelength to enhance complexity and functionality. However, challenges in high-level integration and on-chip operation remain for this advanced architecture. The authors develop a dedicated control and operation protocol, enabling a record high weight precision and demonstrating comparable processing capability to that of a digital computer in proof-of-concept experiments.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Yue-Xun Huang, Ming Li, Zi-Jie Chen, Yan-Lei Zhang, Xu-Bo Zou, Guang-Can Guo, Chang-Ling Zou
Summary: Mean-field treatment (MFT) is commonly used for approximating the dynamics of quantum optics systems. However, neglecting quantum correlations between modes can lead to unexpected quantum effects. This study presents a theoretical framework based on perturbation theory and MFT to capture these effects and predicts the form and relationship of nonlinear dissipation, parasitic Hamiltonian, and nonlinear coupling rate. The framework is applied to quantum frequency conversion and shows excellent agreement with numerical simulations, revealing the neglected quantum effects by MFT and providing a more precise framework for nonlinear and quantum optics.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Qijing Lu, Lingqin Liao, Longxiang Chen, Junqiang Guo, Ya Hu, Yan-Lei Zhang, Chang-Ling Zou, Xiang Wu, Shusen Xie
Summary: This study investigates the interaction between a microcavity and liquid anisotropic molecules by filling an optofluidic microbubble resonator. Enhanced coupling between the optical mode and the rotation/vibration of molecules leads to the observation of stimulated scattering effects and the generation of quasi-supercontinuum.
LASER & PHOTONICS REVIEWS
(2023)
Article
Multidisciplinary Sciences
Rui Niu, Ming Li, Shuai Wan, Yu Robert Sun, Shui-Ming Hu, Chang-Ling Zou, Guang-Can Guo, Chun-Hua Dong
Summary: The authors propose a universal mechanism to fully control microcombs and demonstrate a wavemeter with a precision of kHz. Microcombs offer a unique and compact solution for various photonics applications. The proposed mechanism stabilizes the microcomb frequency, enabling its use in wavelength measurement with high precision.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Pengfei Yang, Ming Li, Xing Han, Hai He, Gang Li, Chang-Ling Zou, Pengfei Zhang, Yuhua Qian, Tiancai Zhang
Summary: Breaking the time-reversal symmetry of light is crucial for fundamental physics and has gained increasing attention in the study of non-reciprocal photonic devices. In this study, a chiral cavity quantum electrodynamics system with multiple atoms coupled to a Fabry-Perot cavity is experimentally demonstrated. By polarizing the internal quantum state of the atoms, the time-reversal symmetry of the atom-cavity interaction is broken. The strongly coupled atom-cavity system can be described by non-reciprocal quasiparticles called cavity polaritons.
LASER & PHOTONICS REVIEWS
(2023)
Article
Multidisciplinary Sciences
Zhongchu Ni, Sai Li, Xiaowei Deng, Yanyan Cai, Libo Zhang, Weiting Wang, Zhen-Biao Yang, Haifeng Yu, Fei Yan, Song Liu, Chang-Ling Zou, Luyan Sun, Shi-Biao Zheng, Yuan Xu, Dapeng Yu
Summary: Quantum error correction (QEC) protects logical qubits by using a large Hilbert space with redundancy to detect and correct errors in real time. In this study, a QEC procedure was demonstrated in a circuit quantum electrodynamics architecture, where a logical qubit was encoded in photon-number states of a microwave cavity and coupled to an auxiliary superconducting qubit. By applying a tailored frequency comb pulse, error syndrome was extracted and error correction was performed, exceeding the break-even point by about 16% lifetime enhancement. This work illustrates the potential of hardware-efficient discrete-variable encodings for fault-tolerant quantum computation.
Article
Optics
Hao Chen, Zhengyu Wang, Yan Wang, Changqiu Yu, Rui Niu, Chang-Ling Zou, Jin Lu, Chun-Hua Dong, Hongliang Ren
Summary: Whispering gallery mode (WGM) resonators are valuable for precise measurement due to their small size, high sensitivity, and fast response time. This study demonstrates that multimode sensing, utilizing multiple resonances, provides more Fisher information and can achieve better performance than single mode tracking. A temperature detection system based on a microbubble resonator is developed, and a machine learning algorithm is employed to predict unknown temperatures with high accuracy and a large dynamic range.
Article
Physics, Applied
Yuan-Hao Yang, Xin-Biao Xu, Jia-Qi Wang, Mai Zhang, Ming Li, Zheng-Xu Zhu, Zhu-Bo Wang, Chun-Hua Dong, Wei Fang, Huakang Yu, Guang-Can Guo, Chang-Ling Zou
Summary: This study investigates the nonlinear coupling between on-chip confined optical modes and free-space continuum modes. The experiment observed the radiation of second-harmonic wave caused by pump fields in integrated lithium niobate microcavities. The mechanism of nonlinear optical radiation (NOR) is further verified by demonstrating the difference frequency generation between a free-space input and an on-chip pump field. The revealed mechanism of NOR has universal applicability for dielectric photonic integrated devices, allowing for spatial engineering of optical fields and light sources.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Applied
Y. A. Yang, T. A. Zheng, S. -z. Wang, W. -k. Hu, Chang-Ling Zou, T. Xia, Z. -t. Lu
Summary: Quantum nondemolition (QND) measurement enhances detection efficiency and measurement fidelity in precision measurements and quantum information processing. A QND measurement scheme is proposed and demonstrated for the spin states of laser-trapped atoms. This approach utilizes a circularly polarized control laser to create a cycling, spin-selective, and spin-preserving transition on 171Yb atoms in an optical dipole trap.
PHYSICAL REVIEW APPLIED
(2023)
Article
Quantum Science & Technology
Xiaoxuan Pan, Xi Cao, Weiting Wang, Ziyue Hua, Weizhou Cai, Xuegang Li, Haiyan Wang, Jiaqi Hu, Yipu Song, Dong-Ling Deng, Chang-Ling Zou, Re-Bing Wu, Luyan Sun
Summary: Quantum computer can boost machine learning through its inherent quantum parallelism. In the pursuit of quantum advantages for machine learning with noisy intermediate-scale quantum devices, an end-to-end learning model design approach was proposed, where the quantum ansatz is parameterized by directly manipulable control pulses without circuit design and compilation. Experimental realization of quantum end-to-end machine learning on a superconducting processor is reported. The trained model achieved 98% recognition accuracy for two handwritten digits (via two qubits) and 89% for four digits (via three qubits) in the MNIST database, demonstrating great potential for resolving complex real-world tasks when more qubits are available.
NPJ QUANTUM INFORMATION
(2023)
Article
Multidisciplinary Sciences
Xiaoxuan Pan, Zhide Lu, Weiting Wang, Ziyue Hua, Yifang Xu, Weikang Li, Weizhou Cai, Xuegang Li, Haiyan Wang, Yi-Pu Song, Chang-Ling Zou, Dong-Ling Deng, Luyan Sun
Summary: Deep learning and quantum computing have made significant progress in recent years. This work demonstrates the training of deep quantum neural networks using the backpropagation algorithm with a six-qubit programmable superconducting processor. The experimental results show the efficient training of three-layer and six-layer deep quantum neural networks for learning two-qubit and single-qubit quantum channels. This research provides valuable guidance for quantum machine learning applications with current and future quantum devices.
NATURE COMMUNICATIONS
(2023)
Article
Quantum Science & Technology
Ming Li, Yan-Lei Zhang, Xin-Biao Xu, Chun-Hua Dong, Guang-Can Guo, Chang-Ling Zou
Summary: This study explores the continuous-variable quantum entanglement of dissipative Kerr soliton combs in microresonators, uncovering two distinct features: entanglement of comb lines at the spectral edge and diminished entanglement at the center of the spectrum.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Optics
Cong-Hua Yan, Ming Li, Xin-Biao Xu, Yan-Lei Zhang, Xin-Yue Ma, Chang-Ling Zou
Summary: Manipulating single photons coherently and achieving unidirectional propagation are important goals for integrated quantum information processing. In this study, an external scatterer is introduced to cancel the reflection of photons caused by nonideal chiral interactions in a photonic device. By controlling the interference between reflected photons, the reflection properties of single incident photons can be controlled, leading to unidirectional propagation even with nonideal photon-atom interactions.
Article
Physics, Applied
Mai Zhang, Xie-Hang Yu, Xin-Biao Xu, Guang-Can Guo, Chang-Ling Zou
Summary: By utilizing spatial-temporal modulation, single photon spectral manipulation and motion control of massive particles can be achieved, which is significant for photonics integrated chips and microscale particle manipulation.
PHYSICAL REVIEW APPLIED
(2023)