A5101571048- Optical Network Technologies
- Advanced Fiber Laser Technologies
- Advanced Photonic Communication Systems
- Solid State Laser Technologies
- Photonic and Optical Devices
- Photorefractive and Nonlinear Optics
- Laser-Matter Interactions and Applications
- Semiconductor Lasers and Optical Devices
- Laser Design and Applications
- Photonic Crystal and Fiber Optics
- Lower Extremity Biomechanics and Pathologies
- Domain Adaptation and Few-Shot Learning
- Advanced Neural Network Applications
- Sports injuries and prevention
- Advanced Fiber Optic Sensors
- Adversarial Robustness in Machine Learning
- Laser Material Processing Techniques
- Spectroscopy and Laser Applications
- Advanced Wireless Communication Techniques
- Educational Reforms and Innovations
- Linguistic Variation and Morphology
- Cooperative Communication and Network Coding
- Particle physics theoretical and experimental studies
- Laser-induced spectroscopy and plasma
- Cognitive Radio Networks and Spectrum Sensing
Chinese Academy of Sciences
2004-2025
Chinese University of Hong Kong
2016-2025
Czech Academy of Sciences, Institute of Physics
2016-2025
Jinan University
2021-2024
Shandong Yingcai University
2024
Shandong University of Science and Technology
2024
Institute of Physics
2004-2023
University of Hong Kong
2023
University of Chinese Academy of Sciences
2022-2023
Huawei Technologies (China)
2021
Many effective solutions have been proposed to reduce the redundancy of models for inference acceleration. Nevertheless, common approaches mostly focus on eliminating less important filters or constructing efficient operations, while ignoring pattern in feature maps. We reveal that many maps within a layer share similar but not identical patterns. However, it is difficult identify if features with patterns are redundant contain essential details. Therefore, instead directly removing...
<title>Abstract</title> Antiferromagnetism has become a promising candidate for the next generation electronic devices due to its thermal stability, low energy consumption, and fast switching speed. However, canceling of net magnetic moment in antiferromagnetic order presents great challenge on quantitative characterization modulation, hindering investigation application. In this work, utilizing optical second harmonic (SHG) wide temperature range, integrated differential phase contrast...
The cable pin system is an effective device for fixation of transverse patella fractures. However, whether this provides superior results using a minimally invasive technique instead conventional open surgery the K wire tension band method unclear.We asked would be associated with (1) increased operative time; (2) reduced postoperative pain; (3) faster recovery ROM; (4) higher knee scores; and (5) complications.Forty patients displaced fractures participated in prospective, randomized,...
BACKGROUND: Transverse patella fractures are the most common type of fractures. Minimally invasive surgical technique for treatment transverse with Cable Pin System has not been previously reported. METHODS: Thirty-four patients displaced were included in this prospective study and operatively treated by a minimally technique. Postoperative evaluation was based on radiographs, Visual Analog Scale pain, range motion, Bostman grading scale. RESULTS: A total 31 finally included, an average...
We have designed a single thin planar diffractive optical element (DOE) based on the principle of optics to simultaneously split and concentrate incident light into several energy ranges for lateral multijunction solar cells. A prototype with maximum thickness 6.95 μm 32 quantized levels in depth was fabricated by photolithographic technology. The spectrum-splitting concentrating performance prototype, which were measured quantitatively, show good agreement simulation results. As mass...
We proposed a novel scheme for realizing Kramers–Kronig detection by utilizing the narrow-band and high-gain characteristic of stimulated Brillouin scattering. At receiver, weak virtual carrier located at edge signal spectrum is amplified output slave laser, which injection locked pump seed provided transmitter. More than 2.7-dB optical signal-to-noise ratio sensitivity improvement experimentally obtained compared with traditional assisted after an 80-km transmission. The effective number...
Unlike the scenario in traditional high-order QAM signals, Viterbi and (V&V) algorithm becomes more powerful for carrier phase recovery (CPR) probabilistically shaped (PS) signals. The reason relies on that PS signals assign much higher probability to innermost 4 constellation points, which are qualified V&V algorithm. In this article, we compare performance of blind search (BPS) PS-64 PS-256 aspects window size signal noise ratio under constraint different laser linewidths. Besides, impact...
A broadband photonic-assisted microwave receiver with high cross-channel interference suppression and image rejection is proposed experimentally demonstrated. At the input of receiver, a signal injected into an optoelectronic oscillator (OEO), which functions as local (LO) to generate low-phase noise LO well mixer down-convert intermediate frequency (IF). photonic filter (MPF), realized by joint operation phase modulator (PM) in OEO Fabry-Perot laser diode (FPLD), used narrowband select IF...
This paper presents a continuous wave and Q-switched Nd:YAG laser pumped by diode at 885 nm. The maximum output power of the CW is 8.28 W with an absorbed slope efficiency 35.01%. Q-switching achieved using V³⁺:YAG crystal as saturable absorber. passively 3.55 pumping 28.65 operated dual wavelength 1319 1338 shortest pulse widths are 20.20 20.86 ns, repetition rate 64.10 kHz.
We propose an integrated vector modulator based on two compact and high-speed germanium-on-silicon Franz-Keldysh electro-absorption modulators. The proposed is extremely with a total footprint of only 1800 μm×200 μm. further experimentally demonstrate 4-quadrature-amplitude-modulation (4-QAM) at 40 Gb/s over 20-km standard single-mode fiber transmission. complex signal successfully re-constructed single-ended photodiode in recently Kramers-Kronig receiver for future low-cost, low-power,...
MSnO4 (M = Mn, Zn, Co, Mg, etc.) has been widely investigated as an anode material for lithium-ion batteries in recent years, but its practical applications are limited by serious capacity loss caused severe volume expansion during Li+ insertion/extraction. So far, hollow structures, carbon coating, and encapsulation reduced graphene oxide have introduced to improve the electrochemical properties of MSnO4. In this study, Mn2SnO4 nanoparticles@reduced (Mn2SnO4@rGO) composites were prepared...
In this paper, we report the first demonstration of using silicon photonic integrated circuits for 62 Gb/s 4-quadrature-amplitude-modulation (4-QAM) orthogonal frequency-division multiplexing (OFDM) and 112 16-QAM OFDM over an 80-km standard single-mode fiber (SSMF) transmission with Kramers-Kronig (KK) direct detection. Single sideband optical signals are generated by two micro-ring modulators, directly detected a single germanium-on-silicon waveguide photodiode fabricated in multi-project...
We investigate the optimal constellation size for probabilistic shaping (PS) under constraint of different effective numbers bits (ENOB) analog-to-digital converter (ADC) at receiver. For a fixed entropy, increasing brings larger gain, while it also leads to higher peak-to-average-power ratio, which makes signal more sensitive ENOB and fiber nonlinearity. Our experimental results show that PS-44 quadrature amplitude modulation (QAM) outperforms both PS-64 QAM uniformly shaped 32 (U-32 QAM)...
Owing to the hypergrowth of cloud computing and video on demand, further promotion data capacity among centre interconnects is placed agenda. Generally, multiplexing modulation techniques with spectral efficiency (SE) improvement are two common ways increase aggregate rate. Up now, have been successfully implemented in dimensions polarization, wavelength, fibre cores modes, reaching a transmission rate over Pb/s [1 ]. As for single lane (i.e., fibre, polarization) transmission, increasing SE...
Two-dimensional ferromagnetic Weyl half-metals that are robust against spin–orbital coupling were theoretically proposed recently, in which the nodal points and loops protected by specific symmetries. As symmetry of a material is highly dependent on magnetization orientation, here we predict family two-dimensional half-metals, Mn2X3 (X = S, Se, Te) monolayers, to investigate band topology under different orientations presence coupling. The Curie temperatures (∼1000 K) estimated be much...
A novel approach to the implementation of photonic aggregation microwave signals using a single dual-polarization dual-drive Mach-Zehnder modulator (DP-DDMZM) and polarizer is proposed experimentally demonstrated. Four binary phase shift keying (BPSK) with an identical carrier frequency are aggregated into 16 quadrature amplitude modulation (16QAM) optical signal through control at DP-DDMZM polarizer. The then transmitted over fiber coherent receiver, where BPSK recovered by demodulating...
In this letter, we investigate the performances of different learning rate decay schedules in least mean square (LMS) based equalization. The required iteration numbers for convergence are 275, 150 and time-based, staircase exponential respectively, which much less than 1000, number constant schedule processing our experimental data. Meanwhile, corresponding training times reduced to shorter one third, fifth fourth that schedule. system aspects carrier signal power ratio optical noise...
We demonstrate a laser-diode-pumped Q-switched 1329 nm neodymium-doped calcium-niobium-gallium-garnet (Nd:CNGG) laser using V:YAG crystal as saturable absorber. An average output power of 353 mW and repetition rate 13.43 kHz for pulses were obtained. The pulse width was from 124 to 151.4 ns under different pump powers. Output 685 obtained without the inserted.
We report on recent experimental results of the spontaneous antiphase dynamics that occurs in a laser-diode-pumped multimode passively $Q$-switched microchip $\mathrm{Yb}:\mathrm{YAG}$ (where YAG is yttrium aluminum garnet) lasers with saturable absorber $\mathrm{GaAs}$. observe pulse sequence first mode characterized by one, two, and three pulses as group all modes display an state pumping ratio rises. modify rate equations to account for nonlinear absorption due $\mathrm{GaAs}$ presence...
A diode end-pumped self-Q-switched Cr,Nd:YAG laser was established with pulse duration in the range of 8–10 ns. The maximum average output power 4.4 W and slope efficiency 27% using an coupler R = 70%. At pumping 17.4 produces high-quality pulses at 1064 nm a TEM00-mode.