A5100354321- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Advanced Photonic Communication Systems
- Semiconductor Lasers and Optical Devices
- Microwave Engineering and Waveguides
- Radio Frequency Integrated Circuit Design
- Advanced Power Amplifier Design
- Photorefractive and Nonlinear Optics
- Advanced Fiber Optic Sensors
- Advanced Battery Materials and Technologies
- PAPR reduction in OFDM
- GaN-based semiconductor devices and materials
- Electrowetting and Microfluidic Technologies
- Electromagnetic Simulation and Numerical Methods
- Full-Duplex Wireless Communications
- Seismic Waves and Analysis
- Advancements in Battery Materials
- Acoustic Wave Resonator Technologies
- Optical Wireless Communication Technologies
- Photonic Crystals and Applications
- Inorganic Chemistry and Materials
- Advanced Optical Network Technologies
- Adaptive optics and wavefront sensing
- Plasmonic and Surface Plasmon Research
China Electronics Technology Group Corporation
2022-2024
Beijing University of Posts and Telecommunications
2022-2024
Beihang University
2024
Xi'an Jiaotong University
2023-2024
Hebei Science and Technology Department
2022
South China University of Technology
2021-2022
BOE Technology Group (China)
2019
It is vital to dynamically regulate S activity achieve efficient and stable room-temperature sodium-sulfur (RT/Na-S) batteries. Herein, we report using cobalt sulfide as an electron reservoir enhance the of sulfur cathodes, simultaneously combining with single atoms double-end binding sites for a conversion process. The rationally constructed CoS2 enables straight reduction short-chain sodium polysulfides (Na2 S4 ) via streamlined redox path through transfer. Meanwhile, synergistically work...
Abstract Fast scanning speed and low-power consumption are becoming progressively more important in realizing high-performance chiplet optical phased arrays (OPAs). Here, we successfully demonstrated integrated OPAs with multiple waveguides channels based on thin-film lithium niobate-on-insulator (LNOI) platform. Specifically, two niobate (LN) OPA chips have been implemented 32 48 LN waveguides, respectively, enabled by electro-optic modulations, which showcases the low power (1.11 nJ/π)...
Abstract On-chip Mach–Zehnder interferometer (MZI) is a fundamental component for many integrated systems. It holds great promise in photonic applications at visible wavelengths. This paper presents an on-chip silicon nitride thermo-optic MZI. capable of generating interference wide wavelength range the spectrum, including 488 nm, 532 and 633 nm. The optical transmission loss reduced by optimizing device architecture. work provides new insights into designing optics demonstrates potential...
In this brief, a power amplifier (PA) with excellent integrated filtering characteristics is presented. The designed process based on novel impedance transformer (IT) consisting of cascaded coupled-line sections stubs. proposed IT generates four transmission zeros (TZs), which not only greatly improves the frequency selectivity, but also second harmonic suppression performance, further enhancing linearity PA. For demonstration, bandpass PA designed, fabricated, and measured. exhibits both...
In this brief, a monolithically integrated broadband load modulated balanced amplifier (LMBA) chip without BA pre-matching network is proposed and designed. It the first time that LMBA operating at sub-6 GHz has been discussed about performance. follows with only one inductor output quadrature coupler, which can effectively reduce loss improve efficiency. The modulation behavior of analyzed, indicating it an appropriate trajectory. For verification, was fabricated measured in 0.25-...
A broadband diplexer-integrated double-pole single-throw (DPST) switch is proposed to realize frequency division duplexing (FDD) and time (TDD). It consists of a lowpass filter (LPF) bandpass (BPF). The series LC resonators are used in both channels create transmission zeros (TZs) the stopband ensure high selectivity. diplexer realized by inter-digital capacitors microstrip section inductors, which can achieve low cost compact size. Besides, this does not require T-junction, achieving For...
In this brief, a novel filtering impedance transformer with good selectivity and high termination is proposed, of which close-formed design equations are derived effectively verified. Then, dual-band dual-output power amplifier (PA) operating at 2.4-2.6 GHz 3.4-3.6 designed based on the proposed transformer. The PA contains diplexer-like output matching network, can separate two band signals into corresponding branches. EM-simulated results network show that isolation between ports better...
This letter presents a novel diplexer-like dual-band filtering (DBF) power amplifier (PA). The PA is mainly composed of DBF output matching network, which can better separate carriers into two ports. In addition, the also integrates characteristics, achieving out-of-band and second harmonic suppression. For demonstration, (nonconcurrent) operating at 2.1/3.5 GHz designed, fabricated, measured. measured small-signal maximum gains <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Mach-Zehnder interferometer (MZI) has attracted intense research interest due to the extensive applications in optical integrated systems. This paper presents a TE-Pass/TM-Stop graphene-based on-chip MZI, including splitter, phase shift arm, reference arm and combiner. The splitter combiner are based on subwavelength gratings (SWGs) coupler. Hybrid slot waveguides with photonic crystals (PhC) adopted as without graphene, respectively. results show that sensitivity is 1010 rad/RIU-cm at 1.55...
In this brief, the exhaustive design method for in-line quasi-TEM mode dielectric waveguide filter (DWF) with dispersive coupling is presented. Using structure, controllable finite position transmission zeros (TZs) can be implemented without cross-coupling which commonly used in DWF, and coefficient filters need provided at center frequency same time. The matrix (CM) including CM M0 slope Md are derived from synthesized traditional CM, procedures of parameter extraction DWF also demonstrated...
Distributed optical fiber sensors have the advantages of corrosion resistance, anti-electromagnetic interference and adaptability to extreme environments. They can be used in perimeter security, pipeline monitoring, seismic detection other fields. A novel sensor called microwave frequency interferometer has been proposed for low sensing applications such as submarine monitoring. However, MFFI only achieve integrated cannot distributed localization disturbances. In order solve problem that...
We propose and demonstrate an integrated microwave photonic sideband selector based on the thin-film lithium niobate (TFLN) platform by integrating electro-optic Mach–Zehnder modulator (MZM) a thermo-optic tunable flat-top microring filter. The has two functions: modulation of wideband RF signal selection. supports processing signals up to 40 GHz, with undesired sidebands effectively suppressed more than 25 dB. demonstrated device shows great potential for TFLN technology in applications,...
A photonic instantaneous microwave frequency measurement scheme based on frequency-to-time mapping and channelization is proposed. An unknown signal divided into four channels mixed with a broadband linear frequency-modulated signal. The information converted to the time domain, range has been expanded due channelization. simulation system constructed demonstrate effectiveness of proposed method. proof-of-concept experimental result shows that errors can be kept in 20 MHz 10 resolution, 1 GHz 39 GHz.
The electrical mixer is limited by operation bandwidth and parallel processing capacity, suffering from increasingly serious electro-magnetic interference. By introducing photonic properties, microwave technology has many advantages compared to the traditional technology, such as low loss, large bandwidth, high anti-electromagnetic interference so on. In this work, a Stimulated Brillouin Scattering (SBS) based with image rejection capacity proposed. Due wavelength-selectivity wideband...
We demonstrate a three-active-section directly modulated laser to expand the modulation bandwidth. The bandwidth reaches 48 GHz through photon-photon resonance (PPR) effect generated by active optical feedback and detuned loading effect.
To mitigate the accumulated linearity chromatic dispersion (CD), this paper numerically analyzes transmission performance of Nyquist-pulse-shaped 16-quadrature amplitude modulation (Nyquist-16QAM) subcarrier (SCM) in intensity direct detection (IM/DD) using different digital equalizations. We first theoretically study tolerance penalties IM/DD system. Then we compare CD sensitivity between multi-modulus modulus algorithm (MMA), modified MMA (MMMA), parallel blind adaptation equalization,...
On-chip Mach-Zender interferometer (MZI) is critical to integrated photonic systems and promising for many applications at visible wavelengths. In this paper, the fabrication test of a visible-spectrum silicon nitride (SiN) thermo-optic on-chip MZI are discussed. The experimental results showed that can work in wavelengths, including 488 nm, 532 nm 633 nm. output light changes from dark dark, which verifies generate movable interference fringes.
We proposed an ultra-wide-band microwave photonics flexible frequency conversion scheme for integrated electronic systems, meeting the requirements of multifunctional signal without crosstalk. The reconfigurable filter is exploited to achieve segmentation optical broadband with different center and elastic bandwidth. LO adapted target IF provided by carrier, carrier-suppression single sideband mode DPMZM ensures function. numerical simulation introduced verify feasibility effectiveness,...
The trend of modern radar signals towards multi format, frequency band, and large bandwidth has posed greater challenges to signal detection in electronic warfare, requiring receivers have instantaneous bandwidth, wide spectral coverage high-frequency resolution capabilities. Microwave photon technology, due its advantages low loss, resistance electromagnetic interference, simple equipment structure, is matched with the demand for ultra wideband channelized reception. This article designs a...
The high-frequency and tunable microwave signals are highly desirable in the files of military civilian. photonic technology is an important solution to generate signals. Among them, integrated solutions have a broader application prospect due its small size, large bandwidth, low power consumption, etc. We demonstrate design monolithic coupled DFB lasers (IC-DFB) signal. A semiconductor optical amplifier (SOA) between adjust coupling strength. By tuning injection current SOA section, with...
We present a four-channel ultrafast wavelength-swept distributed feedback (DFB) semiconductor laser array based on the reconstruction-equivalent-chirp (REC) technique using instantaneous injection current modulation. With aid of our designed driving circuit system consists microcontroller unit (MCU), field-programmable gate (FPGA) and negative metal-oxide-semiconductor field effect transistors (n-MOSFETs), precise pulse for 4-channel REC-DFB can be generated fast tuning 16.424 nm within 10...