A5100350491- Advanced Photonic Communication Systems
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Photonic and Optical Devices
- Full-Duplex Wireless Communications
- Advanced Fiber Optic Sensors
- Radar Systems and Signal Processing
- Tribology and Lubrication Engineering
- Photorefractive and Nonlinear Optics
- Gear and Bearing Dynamics Analysis
- Advanced Optical Sensing Technologies
- Advanced Chemical Physics Studies
- Radio Frequency Integrated Circuit Design
- PAPR reduction in OFDM
- Semiconductor Lasers and Optical Devices
- Microwave Engineering and Waveguides
- Solid State Laser Technologies
- Advanced Measurement and Detection Methods
- Spectroscopy and Laser Applications
- Laser Design and Applications
- Optical Systems and Laser Technology
- Advanced DC-DC Converters
- Multilevel Inverters and Converters
- Random lasers and scattering media
- Sparse and Compressive Sensing Techniques
Shanghai Municipal Education Commission
2018-2025
East China Normal University
2015-2025
Nanjing University of Posts and Telecommunications
2024-2025
Nanjing University of Aeronautics and Astronautics
2025
Hohai University
2024
China Shenhua Energy (China)
2024
Xi’an University of Posts and Telecommunications
2024
Southeast University
2024
Queen's University
2017-2024
Hebei University of Technology
2023-2024
Abstract Recent advancements in integrated soliton microcombs open the route to a wide range of chip-based communication, sensing, and metrology applications. The technology translation from laboratory demonstrations real-world applications requires fabrication process photonics chips be fully CMOS-compatible, such that manufacturing can take advantage ongoing evolution semiconductor at reduced cost with high volume. Silicon nitride has become leading CMOS platform for devices, however, it...
We propose a scheme to obtain stable nonlinear optical pulses and realize their storage retrieval in an ultracold ladder-type three-level atomic gas via electromagnetically induced transparency. Based on Maxwell-Bloch equations we derive equation governing the evolution of probe field envelope, show that solitons with ultraslow propagating velocity extremely low generation power can be created system. Furthermore, demonstrate such stored retrieved by switching off control field. Due balance...
A photonic approach for simultaneous wideband radio-frequency (RF) self-interference cancellation and frequency downconversion in an in-band full-duplex radio-over-fiber system is proposed based on a dual-polarization quadrature phase-shift keying (DP-QPSK) modulator. The upper dual-parallel Mach-Zehnder modulator (DP-MZM) the DP-QPSK used to cancel directly optical domain generate two sidebands of desired RF signal, whereas lower DP-MZM generates local oscillator. After detecting combined...
A silicon nitride waveguide is a promising platform for integrated photonics, particularly due to its low propagation loss compared other complementary metal–oxide–semiconductor compatible waveguides, including silicon-on-insulator. Input/output coupling in such thin optical waveguides key issue practical implementations. Fiber-to-chip grating couplers usually exhibit efficiency because the moderate index contrast leads weak radiation strengths and poor directionality. Here, we present...
A photonic-assisted multiple microwave frequency measurement approach based on stimulated Brillouin scattering (SBS) and frequency-to-time mapping with high accuracy a wide range is reported. sweeping signal modulated an optical carrier that shifted by the shift as probe wave. The unknown frequencies are original to pump length of single-mode fiber. Thanks SBS effect, gain spectrum detected After from branch at photodetector, amplitude direct-current component will be much increased exact...
Chip-fiber grating couplers have been widely used in silicon-on-insulator platforms. In silicon nitride waveguides, the lower index contrast yields gratings with a weaker radiation strength and poor directionality, thereby limiting coupling efficiency. Here we propose design an apodized self-imaging coupler that images in-plane waveguide input to output optical fiber placed at specific distance above chip. Both amplitude phase apodizations are employed engineer transfer function of produce...
An approach to photonic-assisted carrier-suppressed single-sideband radio-frequency (RF) self-interference cancellation with improved spectrum efficiency and fiber transmission capability is proposed for in-band full-duplex radio-over-fiber systems. The key achieve RF generate two signals one having a received signal the other only signal, which implemented by using dual-polarization binary phase-shift keying (DP-BPSK) modulator. By controlling arrival time power of electrical applied...
In this paper, all-optical short-time Fourier transform (STFT) based on stimulated Brillouin scattering (SBS) is proposed and further used for real-time time-frequency analysis of different radio frequency (RF) signals. the STFT scheme, SBS not only provides a band-pass filter implementing window function in conjunction with periodic frequency-sweep optical signal but also obtains domain information time windows through generated waveform via frequency-to-time mapping (FTTM). A then...
Wear is one of the most common failures hydrodynamic bearings. The main purpose present work was to investigate effects wear on lubrication performance and acquire efficient vibration signatures for fault diagnosis. In this paper, a finite element model (FEM) two-disk rotor supported worn bearings presented in which oil film force evaluated by linear nonlinear models. Numerical experimental results indicate that static dynamic characteristics bearing are significantly changed wear, leading...
Abstract In this paper, we present a high peak power passively Q-switched intracavity frequency-doubled green laser based on an efficient LED-pumped Nd:YAG dual-rod module. quasi-continuous wave (QCW) running operation, the average output of fundamental at 1064 nm reaches as 20.98 W repetition rate 50 Hz with maximum single pulse energy 419.6 mJ, corresponding to optical conversion efficiency 38.8% and slope 41%. Under conditions, is 1.4 MW duration 88 ns. Through fine-tuning incident angle...
In response to the urgent demands of Internet Things for precise indoor target positioning and information interaction, this paper proposes a multi-band analog radio-over-fiber mobile fronthaul system. The objective is obtain target's location in environments while integrating remote beamforming capabilities achieve wireless access targets. Vector signals centered at 3, 4, 5, 6 GHz 30 are generated centrally distributed unit (DU) fiber-distributed active antenna (AAU) Target achieved by...
ABSTRACT In this study, we demonstrate an intracavity frequency‐doubled 532‐nm laser with a high peak power and narrow pulse width based on LED‐pumped electro‐optically (E‐O) Q‐switched Nd:YAG laser. the operation mode, maximum output of 4.35 mJ energy at 1064 nm was obtained repetition rate 200 Hz duration 88 ns 50 kW. By optimizing incidence angle KTP crystal to satisfy noncritical phase‐matching condition, for green 532 1.55 46 33.7 kW by frequency doubling. To best our knowledge, is...
Accurately estimating the State of Charge (SOC) power batteries is crucial for Battery Management Systems (BMS) in new energy intelligent connected vehicles. It directly influences vehicle range, management efficiency, and safety lifespan battery. However, SOC cannot be measured with instruments; it needs to estimated using external parameters such as current, voltage, internal resistance. Moreover, represent complex nonlinear time-varying systems, various uncertainties—like battery aging,...
An on-chip two-step microwave frequency measurement method with high accuracy and an ultra-wide range is reported. A silicon photonic integrated micro-disk resonator (MDR) array used to coarsely measure the signal via of add-drop MDRs smaller disk radii; then MDR a larger radius finely frequency, which done by monitoring optical powers signals from through port drop MDRs. The proposed system features very compact structure, range, accuracy, verified proof-of-concept experiment using two...
A photonics-assisted joint communication-radar system is proposed by introducing a quadrature phase-shift keying (QPSK)-sliced linearly frequency-modulated (LFM) signal. An LFM signal carrier-suppressed single-sideband modulated onto the optical carrier in one dual-parallel Mach-Zehnder modulator (DPMZM) of dual-polarization (DPol-DPMZM). The other DPMZM biased as an IQ to implement QPSK modulation on carrier. polarization orthogonal signals from DPol-DPMZM are further combined and detected...
In this article, a method for improving the accuracy and resolution of filter-and frequency-to-time mapping (FTTM)-based time frequency acquisition system in fast sweep scenario is proposed by broadening filter bandwidth. It found that width generated pulse via FTTM mainly determined impulse response when rate very fast. Therefore, appropriately increasing bandwidth can significantly reduce pulsewidth, so as to improve measurement resolution. To verify validity, short-time Fourier transform...
A novel filterless optical millimeter-wave generation scheme via two parallel dual-parallel Mach–Zehnder modulators (MZMs) is proposed. Theoretical analysis suggests that it can be used for the of signal with octupling or 16-tupling local oscillator. An 80 GHz generated by a 10 RF oscillator, 5 Several influence factors on performance sideband suppression ratio (OSSR) and radio frequency spurious (RFSSR) are numerically studied. Simulation results show keep good performance, especially...