Wangzhe Li
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View article: High-Speed Terahertz Modulation Signal Generation Based on Integrated LN-RMZM and CPPLN
High-Speed Terahertz Modulation Signal Generation Based on Integrated LN-RMZM and CPPLN Open
With the increasing communication frequencies in 6G networks, high-speed terahertz (THz) modulation signal generation has become a critical research area. This study first proposes an on-chip high-speed THz modulation signal generation sys…
View article: Integrated sensing and communication system based on a photonic integrated broadband multi-beamformer
Integrated sensing and communication system based on a photonic integrated broadband multi-beamformer Open
An integrated sensing and communication (ISAC) system enabled by a photonic integrated broadband multi-beamformer is proposed and demonstrated. The integrated multi-beamformer, which employs an optical true-time-delay induced Blass matrix …
View article: A Transceiver-Shared Photonic Integrated Broadband Multi-Beamformer Based on an Extended Blass Matrix
A Transceiver-Shared Photonic Integrated Broadband Multi-Beamformer Based on an Extended Blass Matrix Open
Multi-beam phased array antennas have become essential in modern radar and communication systems, offering high gain, superior directivity, and exceptional agility. However, traditional multi-beam phased array antennas face significant cha…
View article: Wide‐Angle Scanning Array With Sidelobe Reduction Using Single Substrate Layer
Wide‐Angle Scanning Array With Sidelobe Reduction Using Single Substrate Layer Open
An X‐band wide‐angle scanning array with sidelobe reduction and low gain fluctuation performance is presented in this paper. The element of the array consists of a bent horizontal dipole and two coupled‐fed vertical monopoles. By switching…
View article: A Resolution-Improving Method for Multiband Imaging Based on an Extrapolated RELAX Algorithm
A Resolution-Improving Method for Multiband Imaging Based on an Extrapolated RELAX Algorithm Open
A resolution-improving method for multiband imaging based on an extrapolated RELAX algorithm (ERA) is proposed. The proposed method improves image resolution by reconstructing a wideband signal through nonadjacent narrow subbands. The key …
View article: Two-Dimensional Autofocus for Ultra-High-Resolution Squint Spotlight Airborne SAR Based on Improved Spectrum Modification
Two-Dimensional Autofocus for Ultra-High-Resolution Squint Spotlight Airborne SAR Based on Improved Spectrum Modification Open
For ultra-high-resolution (UHR) squint spotlight airborne synthetic aperture radar (SAR), the severe range-azimuth coupling caused by squint mode and the spatial and frequency dependence of the motion error brought by ultra-wide bandwidth …
View article: Lithium Niobate Electro-Optic Modulation Device without an Overlay Layer Based on Bound States in the Continuum
Lithium Niobate Electro-Optic Modulation Device without an Overlay Layer Based on Bound States in the Continuum Open
Electro-optic modulation devices are essential components in the field of integrated optical chips. High-speed, low-loss electro-optic modulation devices represent a key focus for future developments in integrated optical chip technology, …
View article: CycleGAN-Based SAR-Optical Image Fusion for Target Recognition
CycleGAN-Based SAR-Optical Image Fusion for Target Recognition Open
The efficiency and accuracy of target recognition in synthetic aperture radar (SAR) imagery have seen significant progress lately, stemming from the encouraging advancements of automatic target recognition (ATR) technology based on deep le…
View article: Microwave photonic radar system with improved SNR performance utilizing optical resonant amplification and random Fourier coefficient waveforms
Microwave photonic radar system with improved SNR performance utilizing optical resonant amplification and random Fourier coefficient waveforms Open
A microwave photonic (MWP) radar system with improved signal-to-noise ratio (SNR) performance is proposed and experimentally demonstrated. By improving the SNR of echoes through properly designed radar waveforms and resonant amplification …
View article: Phase-Derived Ranging Based Fiber Transfer Delay Measurement Using a Composite Signal for Distributed Radars with Fiber Networks
Phase-Derived Ranging Based Fiber Transfer Delay Measurement Using a Composite Signal for Distributed Radars with Fiber Networks Open
Fiber transfer delay (FTD) variations influence the coherence of distributed radars with fiber networks, resulting in a performance degradation in target detecting and imaging. To measure and compensate for the variation, a phase-derived r…
View article: Miniature Fourier Transform Spectrometer Based on Thin-Film Lithium Niobate
Miniature Fourier Transform Spectrometer Based on Thin-Film Lithium Niobate Open
A miniature Fourier transform spectrometer is proposed using a thin-film lithium niobate electro-optical modulator instead of the conventional modulator made by titanium diffusion in lithium niobate. The modulator was fabricated by a conta…
View article: Analysis and Compensation for Systematical Errors in Airborne Microwave Photonic SAR Imaging by 2-D Autofocus
Analysis and Compensation for Systematical Errors in Airborne Microwave Photonic SAR Imaging by 2-D Autofocus Open
In the area of synthetic aperture radar (SAR), the ultrahigh resolution is always a continuous pursuit for researchers. To realize ultrahigh resolution, microwave photonics technology is an excellent solution since it has advantages of low…
View article: Low-loss, ultracompact n-adjustable waveguide bends for photonic integrated circuits
Low-loss, ultracompact n-adjustable waveguide bends for photonic integrated circuits Open
Countless waveguides have been designed based on four basic bends: circular bend, sine/cosine bend, Euler bend (developed in 1744) and Bezier bend (developed in 1962). This paper proposes an n -adjustable (NA) bend, which has superior prop…
View article: Investigation of signal-to-noise ratio performance of microwave photonic links enhanced by optical injection locking and channelized spectrum stitching
Investigation of signal-to-noise ratio performance of microwave photonic links enhanced by optical injection locking and channelized spectrum stitching Open
A signal-to-noise ratio (SNR) improvement method for microwave photonic (MWP) links enhanced by optical injection locking (OIL) and channelized spectrum stitching (CSS) is investigated and experimentally demonstrated. By exploiting the res…
View article: SAR Target Recognition Using cGAN-Based SAR-to-Optical Image Translation
SAR Target Recognition Using cGAN-Based SAR-to-Optical Image Translation Open
Target recognition in synthetic aperture radar (SAR) imagery suffers from speckle noise and geometric distortion brought by the range-based coherent imaging mechanism. A new SAR target recognition system is proposed, using a SAR-to-optical…
View article: Scalable distributed microwave photonic MIMO radar based on a bidirectional ring network
Scalable distributed microwave photonic MIMO radar based on a bidirectional ring network Open
A scalable distributed microwave photonic multiple-input-multiple-output (MIMO) radar is proposed based on a bidirectional ring network. The network is constructed with a fiber ring on which a local node and several remote nodes are distri…
View article: Wideband reconfigurable signal generation based on recirculating frequency-shifting using an optoelectronic loop
Wideband reconfigurable signal generation based on recirculating frequency-shifting using an optoelectronic loop Open
A novel photonic-assisted reconfigurable wideband signal generator for linearly frequency-modulated (LFM) signals generation is proposed and experimentally demonstrated. A frequency-shifting recirculating optoelectronic (FSRO) loop is empl…
View article: Microwave photonic de-chirp receiver for breaking the detection range swath limitation
Microwave photonic de-chirp receiver for breaking the detection range swath limitation Open
A novel microwave photonics-based de-chirp radar receiver which breaks the limitation of the detection range swath is proposed and demonstrated. In the proposed receiver, a multi-channel time-division photonics de-chirp processing is imple…
View article: A Photonic Dechirp-on-Receive Pulse Synthetic Aperture Radar Using a Phase Correlated Optical Reference Signal in a DSP-Based Optical Coherent Receiver
A Photonic Dechirp-on-Receive Pulse Synthetic Aperture Radar Using a Phase Correlated Optical Reference Signal in a DSP-Based Optical Coherent Receiver Open
A pulse radar based on photonics-assisted signal generation and stretch processing is proposed and experimentally demonstrated. A radio frequency (RF) linear frequency modulated (LFM) pulse signal is generated by photonic frequency doublin…
View article: Microwave photonic radar with a fiber-distributed antenna array for three-dimensional imaging
Microwave photonic radar with a fiber-distributed antenna array for three-dimensional imaging Open
A microwave photonic (MWP) radar with a fiber-distributed antenna array for three-dimensional (3D) imaging is proposed and demonstrated for the first time. Photonic frequency doubling, wavelength-division multiplexing and radio-over-fiber …
View article: Novel RF-source-free reconfigurable microwave photonic radar
Novel RF-source-free reconfigurable microwave photonic radar Open
A novel reconfigurable microwave photonic (MWP) radar has been proposed and experimentally demonstrated. At a transmitting end, a microwave signal with a large bandwidth and ultra-low phase noise is generated by a Fourier domain mode locki…
View article: Channelized photonic-assisted deramp receiver with an extended detection distance along the range direction for LFM-CW radars
Channelized photonic-assisted deramp receiver with an extended detection distance along the range direction for LFM-CW radars Open
A novel photonic-assisted deramp receiver extends detection distance along range direction of linearly-frequency-modulated continuous wave (LFM-CW) radars is proposed. A dual-polarization quadrature phase shift keying (DP-QPSK) modulator i…
View article: Reconfigurable multi-band microwave photonic radar transmitter with a wide operating frequency range
Reconfigurable multi-band microwave photonic radar transmitter with a wide operating frequency range Open
A photonics-assisted multi-band radar transmitter operating in a wide frequency range has been proposed and experimentally demonstrated. The multi-band radar transmitter incorporates a tunable optoelectronic oscillator (OEO), a low-frequen…
View article: Wide-band RF receiver based on dual-OFC-based photonic channelization and spectrum stitching technique
Wide-band RF receiver based on dual-OFC-based photonic channelization and spectrum stitching technique Open
A novel wide-band RF receiver based on a dual-OFC-based channelization and spectrum stitching technique is proposed and demonstrated experimentally. In the scheme, a dual-OFC-based channelizer is utilized as the front-end to slice the RF s…
View article: Frequency-Oriented Subsampling by Photonic Fourier Transform and I/Q Demodulation
Frequency-Oriented Subsampling by Photonic Fourier Transform and I/Q Demodulation Open
Subsampling can directly acquire a passband within a broad radio frequency (RF) range, avoiding down-conversion and low-phase-noise tunable local oscillation. However, subsampling suffers from band folding and self-image interference. In t…
View article: Feedforward linearization for RF photonic link with broadband adjustment-free operation
Feedforward linearization for RF photonic link with broadband adjustment-free operation Open
Linearization of radio frequency (RF) photonic link is critical for advance applications because a nonlinear transfer function of electro-optic modulation limits link dynamic range. Although numerous approaches to suppress third order inte…
View article: Polarization-Modulation, I/Q-Demodulation Photonic Bandpass Sampling for Wideband, Multicarrier RF Application
Polarization-Modulation, I/Q-Demodulation Photonic Bandpass Sampling for Wideband, Multicarrier RF Application Open
Radio frequency (RF) photonic link under phase or polarization modulation and coherent in-phase/quadrature (I/Q) demodulation (ΦM/IQ or PolM/IQ) has been reported with unprecedented dynamic range performance, benefiting from the ultrahigh …
View article: Frequency-oriented sub-sampling by photonic Fourier transform and I/Q demodulation
Frequency-oriented sub-sampling by photonic Fourier transform and I/Q demodulation Open
Sub-sampling can acquire directly a passband within a broad radio frequency (RF) range, avoiding down-conversion and low-phase-noise tunable local oscillation (LO). However, sub-sampling suffers from band folding and self-image interferenc…
View article: Real-time frequency-to-time mapping based on spectrally-discrete chromatic dispersion
Real-time frequency-to-time mapping based on spectrally-discrete chromatic dispersion Open
Traditional photonics-assisted real-time Fourier transform (RTFT) usually suffers from limited chromatic dispersion, huge volume, or large time delay and attendant loss. In this paper we propose frequency-to-time mapping (FTM) by spectrall…
View article: Demonstration of a microwave photonic synthetic aperture radar based on photonic-assisted signal generation and stretch processing
Demonstration of a microwave photonic synthetic aperture radar based on photonic-assisted signal generation and stretch processing Open
A microwave photonic synthetic aperture radar (MWP SAR) is developed and experimentally demonstrated. In the transmitter, microwave photonic frequency doubling is used to generate a linearly-frequency-modulated (LFM) radar signal; while in…