A5100391423- Optical Network Technologies
- Advanced Photonic Communication Systems
- Advanced Fiber Laser Technologies
- Advanced Optical Network Technologies
- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Laser-Matter Interactions and Applications
- Random lasers and scattering media
- Semiconductor Lasers and Optical Devices
- Acoustic Wave Phenomena Research
- Advanced Optical Imaging Technologies
- Photonic Crystal and Fiber Optics
- Advanced Optical Sensing Technologies
- Particle Accelerators and Free-Electron Lasers
- Noise Effects and Management
- Network Traffic and Congestion Control
- Optical Systems and Laser Technology
- Neural Networks and Reservoir Computing
- Advancements in Battery Materials
- Network Security and Intrusion Detection
- graph theory and CDMA systems
- Advanced Malware Detection Techniques
- Full-Duplex Wireless Communications
- Ultra-Wideband Communications Technology
- Elevator Systems and Control
Jilin University
1992-2025
PLA Army Engineering University
2025
Shanghai Jiao Tong University
2018-2025
China Railway Group (China)
2024
China Mobile (China)
2009-2024
Taiyuan University of Technology
2017-2024
Huazhong University of Science and Technology
2024
Beijing University of Posts and Telecommunications
2011-2023
Tsinghua University
2003-2023
Peking University
2021
An integrated quantum light source is increasingly desirable in large-scale information processing. Despite recent remarkable advances, a new material platform constantly being explored for the fully on-chip integration of generation, active and passive manipulation, detection. Here, first time, we demonstrate gallium nitride (GaN) microring based generation telecom C-band, which has potential toward monolithic source. In our demonstration, GaN free spectral range 330 GHz near-zero anomalous...
Abstract Sodium metal batteries have attracted rapidly rising attention due to their low cost and high energy densities. However, the instability efficiency of metallic sodium anodes pose significant concerns for practical applications. Here a highly stable anode enabled by an ether‐based electrolyte is reported, which exhibits long‐term cycling up 400 cycles achieves unprecedentedly average Coulombic over ≈99.93%. It revealed that organic/inorganic hybrid structure containing B–O species...
Multiresonance (MR) molecules generally face spectral broadening issues with redshifted emissions. Thus, green emitters full widths at half maximum (FWHMs) of <20 nm are rarely reported, despite being highly desired. Herein, by properly fusing indolo(3,2,1-jk)carbazole (ICZ) and naphthalene moieties, MR which have FWHMs merely 13 (0.064 eV) 14 (0.069 in dichloromethane, accompanied high photoluminescence quantum yields >95%, represent not only the smallest among all but also first based on...
This paper presents a multi-Helmholtz unit series–parallel acoustic metamaterial with segmented noise control effect designed by taking advantage of the adjustable frequency band an metamaterial, aiming to change main spectrum characteristics under different driving conditions military equipment such as tanks. Based on transfer matrix method, theoretical model that can predict hybrid structure multiple Helmholtz resonator (HR) units is established, and its feasibility verified through finite...
Band division multiplexing technology is a promising medium-term transitional solution to deal with the traffic flood, by leveraging existing optical fiber transmission infrastructure. Additionally, deployment of multi-band networks requires updating and upgrading key components, such as amplifiers cross-connects. From cost view, it would be way for operators expand capacity on some links high priority, which are used heavily. Therefore, application scenario this paper positioned in C-C+L...
Retrieval-augmented generation (RAG) has shown great potential for knowledge-intensive tasks, but its traditional architectures rely on static retrieval, limiting their effectiveness complex questions that require sequential information-seeking. While agentic reasoning and search offer a more adaptive approach, most existing methods depend heavily prompt engineering. In this work, we introduce RAG-Gym, unified optimization framework enhances information-seeking agents through fine-grained...
Soft-rigid grippers represent a novel paradigm for grasping complex objects, combining the high deformability of soft components with stiffness rigid components. Recently, bistable structures, as architected materials engineering components, have attracted significant attention their ability to enable rapid-response and shape self-locking. However, challenges persist in utilizing them handling multi-feature i.e., irregular-shaped, fragile, variable-weight objects. Here, we report class...
Fake base station (FBS) has been exploited by criminals to attack mobile users spamming fraudulent messages for over a decade. Despite that prior work proposed several techniques mitigate this issue, FBS spam is still long-standing challenging issue in some countries, such as China, and causes billions of dollars financial loss every year. Therefore, understanding exploring the thematic strategies ecosystem at large scale would improve defense mechanisms.
As the broadband applications continue rising, solutions of high-speed passive optical network (PON) with large power budget are highly desired. Direct detection scheme combined digital signal procession (DSP) has been considered as a promising candidate due to its low cost, consumption and simple architecture. In this paper, we experimentally demonstrate 200 Gb/s/λ 240 time division multiplexed (TDM-PON) downstream transmissions based on four-level pulsed amplitude (PAM-4) modulation direct...
The transmission matrix (TM) is a powerful tool for focusing light through scattering media. Here, we demonstrate Bessel-basis TM that enables tight the media and reduces full width at half maximum of focus by 23% on average, as compared to normally used Hadamard-basis TM. To measure TM, establish common-path inter-mode interferometer (IMI), which can fully utilize pixels spatial modulator, leading an enhancement in peak-to-background intensity ratio (PBR) focus. Experimental results suggest...
With the standardizations of 400GE and 400G completed or near completion, attention is now refocused to next generation techniques with larger bit rates, i.e., 800G. We can see that current research commonly aims short-reach metro transmission for sharing key components 400G, while ultra-long-haul (typically ≥ 1500 km) based on 800G still in unknown state. Moreover, all-optical networking OXC ROADM being gradually deployed all around world, which further increases performance requirement....
A transmission matrix (TM) is a powerful tool for light focusing and imaging through scattering media. For measuring it, the normal way requires establishing multiple-step phase-shifting interferometer, which makes TM measurement not only complex sensitive but also time-consuming. Imaging media using an intensity method can make setup without thus it much simple, more stable, several times faster. Here, based upon differential method, we demonstrated to do different Hadamard orderings. To...
The co-route optical fibers, comprising both co-cable and co-trench pose a significant potential risk to network service quality assurance by operators. They are incapable of achieving high-precision recognition visual state management. In this study, we gathered static dynamic fiber data using linewidth tunable light source (LTLS) introduced multimodal detection architecture that applies ensemble learning the collected data. This constitutes what believe be first field trial concurrent...
Imaging three-dimensional (3D) objects has been realized by methods such as binocular stereo vision and multi-view imaging. These methods, however, needs multiple cameras or shots to get elemental images. In this paper, we develop a single-shot imaging technique utilizing the natural randomness of scattering media. By exploiting memory effect uncorrelated point spread functions (PSF) among media, demonstrate that both with large disparity up seven-view 3D object can be reconstructed from...
A novel multifunctional frequency-doubling optoelectronic oscillator (FD-OEO) mainly based on a Mach-Zehnder modulator (MZM) cascaded with phase (PM) and subsequent optical bandpass filter (OBPF) is proposed. We experimentally demonstrate simultaneous operations of frequency-doubled clock (FD-OC) recovery, low-duty-cycle dual-wavelength prescaled OC recovery error-free fourfold time division demultiplexing the proposed OEO injected 4 × 25-Gb/s time-division-multiplexing (OTDM) signal. show...
Optical Nyquist pulse generation based on a time lens with subsequent optical filtering is proposed. A nearly chirp-free 10-GHz 8.1-ps generator experimentally demonstrated. By inserting group velocity dispersion (GVD) between cascaded phase and amplitude modulators, 11 tones ultraflat frequency comb (OFC) of spacing within 0.9 dB power variation obtained. The quasi-rectangular shape spectrum then filtered out tunable rectangular-shaped band-pass filter (OBPF) the quasi-linear chirp...
Shanghai Synchrotron Radiation Facility (SSRF), a 3.5 GeV, 3.9 nm-rad synchrotron radiation light source, started its user operation in May 2009. By the end of 2015, SSRF has served more than 12000 users and produced major experimental results. The achieved machine availability >98% mean time between failure (MTBF)>80 hours. electron orbit stability storage ring is kept within sub-micron levels. A proposal for Phase-II Project got approval 2015. It consists sixteen advanced beamlines,...
Abstract Ultra-low-loss and large-effective-area fiber has been successfully applied in transoceanic transmission, which is considered as a promising candidate for 100 Gbit/s beyond coherent long-haul terrestrial optical networks. Several theoretical experimental investigations have reported, including provincial field trial. To support application, it urgent to prove that the ultra-low-loss after deployment can significantly enhance performance of transmission over 1000 km compared with...
We present a dispersion-independent phase stabilized distribution architecture for broadband signal based on photonic microwave conjugation. RoF signals are distributed from the central station to each base via fiber ring network. The elimination of dispersion-induced optical decorrelation is achieved because backward transmission phase-conjugated signal, thus EVM optimized. A proof-of-concept experiment demonstrated. QPSK modulated 23-GHz, 400M Baud remote obtained optic loop. demodulated...
For the first time, we demonstrate a 15-Gbaud PM-QPSK 10-mode transmission, extending record reach by 1000 km, to 2320 km now. We develop rules for identifying superior mode-permutation strategies (MPSs) among huge number of MPSs. 24 MPSs are verified in experiments greatly mitigate differential mode delay and mode-dependent loss.
We propose a QNSC pre-coding scheme based on probabilistic shaping of the basis, to reduce probability ciphertext bits that are easier be intercepted. Experiment results show this can improve security performance by 100% in terms Eve’s cipher text BER.