A5074984852- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Optical Network Technologies
- Photonic and Optical Devices
- Advanced Photonic Communication Systems
- Metamaterials and Metasurfaces Applications
- Semiconductor Lasers and Optical Devices
- Advanced Antenna and Metasurface Technologies
- Plasmonic and Surface Plasmon Research
- Antenna Design and Analysis
- Terahertz technology and applications
- Solid State Laser Technologies
- Magneto-Optical Properties and Applications
- Laser-Matter Interactions and Applications
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Photonic Crystals and Applications
- Optical Wireless Communication Technologies
- Advanced Wireless Communication Technologies
- Advanced Optical Network Technologies
- Optical Systems and Laser Technology
- Full-Duplex Wireless Communications
- Optical Coherence Tomography Applications
- Surface Roughness and Optical Measurements
Beijing Jiaotong University
2016-2025
Hunan Normal University
2021-2024
Hebei University
2024
Osaka Institute of Technology
2003-2022
Okayama Prefecture
2022
Okayama University
2022
ORCID
2022
Ministry of Education
2009
Ministry of Education of the People's Republic of China
2008
Bellingham Technical College
2008
Planar metasurfaces and plasmonic resonators have shown great promise for sensing applications across the electromagnetic domain ranging from microwaves to optical frequencies. However, these sensors suffer lower figure of merit sensitivity due radiative non-radiative loss channels in metamaterial systems. We demonstrate a absorber based ultrasensitive scheme at terahertz frequencies with significantly enhanced an order magnitude higher compared planar metasurfaces. Magnetic electric...
We report the simulation, fabrication, and experimental characterization of a multichannel metamaterial absorber with aim to be used as label-free sensing platform in terahertz regime. The topology investigated resonators deposited on thin flexible polymer by means optical lithography is capable supporting multiple resonances over broad frequency range due individual contribution each sub-element unit cell. In order explore performance chosen structure terms phenomenon, reflection feature...
An ultrasensitive metamaterial sensor based on double-slot vertical split ring resonators (DVSRRs) is designed and numerically calculated in the terahertz frequency. This DVSRR design produces a fundament LC resonance with quality factor of about 20 when incidence magnetic field component normal to array. The resonant characteristics sensing performance array are systematically analyzed employing contrast method among three similar resonator (SRRs) structures. research results show that...
The special electromagnetic properties of metamaterials have contributed to the development terahertz technology, and broadband absorbers for various applications been investigated. design metamaterial with tunability is in a particularly attractive position. In this work, tunable absorber proposed based on phase transition material vanadium dioxide (VO2). simulation results show that an excellent absorption bandwidth reaches 3.78 THz absorptivity over 90% under normal incidence. structure...
Considering the multi-functionalization of ligands, it is crucial for ligand molecular design to reveal landscape anchoring sites. Here, a typical triphenylphosphine (TPP) was employed explore its effect on surface CsPbI3 perovskite nanocrystals (PNCs). Except conventionally considered P-Pb coordination, an P-I supramolecular halogen bonding also found NC surface. The coexistence above two types significantly increased formation energy iodine vacancy defects and improved photoluminescence...
Perovskite light-emitting diodes (PeLEDs) based on CsPb(Br/I)
We have demonstrated a dual-wavelength thulium-doped fiber laser with single-longitudinal-mode (SLM) operation at ~2-μm region. A polarization-maintaining chirped Moiré Bragg grating was employed as polarization-dependent narrow-band filter, to suppress multilongitudinal-mode oscillation. Single-and switchable achieved by simply adjusting the polarization controller. also showed that lines retained SLM additional benefit of single polarization. Meanwhile, dependence each wavelength on pump...
A mode-locked thulium-doped fiber laser (TDFL) based on nonlinear polarization rotation (NPR) with different net anomalous dispersion is demonstrated. When the cavity −1.425 ps2, noise-like (NL) pulse coherence spike width of 406 fs and energy 12.342 nJ generated at a center wavelength 2003.2 nm 3 dB spectral bandwidth 23.20 nm. In experimental period 400 min, variation, output power fluctuation, central shift are less than 0.06 nm, 0.04 dB, 0.4 nm, respectively, indicating that NPR-based...
A magnetic field sensor using a dual-frequency optoelectronic oscillator (OEO) incorporating cascaded magnetostrictive alloy-fiber Bragg grating-Fabry Perot (MA-FBG-FP) and FBG-FP filters is proposed demonstrated. In the OEO resonant cavity, two microwave signals are generated, whose oscillation frequencies determined by filter MA-FBG-FP with ultra-narrow notches laser sources. Due to characteristics of MA FBG, generated show different temperature sensitivities. By monitoring variations...
Metamaterial absorbers (MAs) serve as important electromagnetic wave-absorbing devices that have captured the attention of researchers for a long term. Functioning sensitive detectors to determine perturbations in an ambient environment is another significant subsidiary function. Here, we theoretically propose optimized fabrication method implement terahertz MAs with fewer steps and also evaluate both absorption sensing performances such realized by new method. Simulation findings...
Optoelectronic oscillator (OEO) has received growing attentions from researchers in the field of demodulations for optical sensors because its excellent performance combining optics and electronics signal processing. In this article, we present a wideband-tunable OEO angular velocity measurement. The consists two cascaded microwave photonic filters (MPFs), namely, dispersion-induced MPF mainly determining OEO's oscillating frequency two-tap fine selection frequency. With proper control...
We propose and demonstrate a high performance four-wavelength erbium-doped fiber laser (EDFL), enabled by figure-8 compound-ring-cavity (F8-CRC) filter for single-longitudinal-mode (SLM) selection polarization-managed four-channel (PM-FCF) defining four lasing wavelengths. introduce novel methodology utilizing signal-flow graph combined with Mason's rule to analyze CRC in general apply it obtain the important design parameters F8-CRC used this paper. By combining functions of PM-FCF assisted...
In the present paper, we demonstrate first outdoor free-space optical communication (FSOC) system with real-time video transmission in a 2-μm-band state-of-the-art data rate performance of 10 Gbit/s and distance ∼177 m. The measured wide-open eye diagram zero bit-error-rate also validated high quality. FSOC is constructed all homemade components, including single-frequency (SF) thulium-holmium co-doped fiber laser (THDFL), modulation module, demodulation three thulium-doped amplifiers, an...
A narrow-linewidth and low relative intensity noise (RIN) Tm/Ho co-doped fiber laser based on a saturable absorber self-injection locking was demonstrated for the first time. Utilizing technology, frequency power spectral density is remarkably reduced by more than 17.1 dB from 1.21 × 106 Hz2/Hz to 7.30 103 when approximately 1 kHz. Furthermore, with linewidth compressed quarter of original 44.386 kHz 2.850 kHz, RIN less -127.74 dB/Hz, an optical signal-to-noise ratio 71.6 can be obtained....
A multi-wavelength thulium-doped fiber laser using a fiber-based Lyot filter is proposed in 2-μm band for the first time. In cavity, used as comblike wavelength selection component. By adjusting two polarization controllers, stable operation obtained at room temperature, 17 output channels within 10-dB bandwidth from 1982 to 1998 nm are achieved. The flattened spectrum of can by 10% coupling ratio. different spacing be controlled maintaining lengths filters.
A 1.97 μm multiwavelength Tm-doped fiber laser based on a nonlinear amplifier loop mirror (NALM) has been experimentally demonstrated. The NALM with 500 m standard single mode introduces intensity-dependent gain to alleviate competition caused by homogeneous broadening in fibers. At room temperature, up 42 wavelengths wavelength spacing of 0.33 nm oscillate within 10-dB bandwidth simultaneously. Repeat measurement the spectrum shows drift is less than 0.05 40 min.
High stability single- and dual-wavelength compound cavity erbium-doped fiber lasers (EDFLs) with ultra-narrow linewidth, high optical signal to noise ratio (OSNR) widely tunable range are demonstrated. Different from using traditional cascaded Type-1/Type-2 rings as secondary cavities, we nest a Type-1 ring inside Type-2 form passive subring achieve single-longitudinal-mode (SLM) lasing linewidth for the first time. We also show that SLM can be further improved by inserting length of...
We propose and demonstrate a four-wavelength-switchable erbium-doped fiber laser (4WS-EDFL) with four-channel superimposed high-birefringence Bragg grating (SI-HBFBG) dual-coupler ring based compound-cavity (DCR-CC) filter. Both for the first time, SI-HBFBG as reflective filter is used in multi-wavelength switchable to define wavelength channels DCR-CC select single mode from dense longitudinal-modes laser. present detail how design, fabricate, characterize both theoretical analysis...
A high-performance switchable 0.612-nm-spaced dual-wavelength erbium-doped fiber (EDF) laser is proposed and experimentally demonstrated. For the first time, we combine a compound-cavity structure (CCS) an enhanced polarization hole burning (PHB) effect in cavity to obtain stable lasing (λ1 λ2) single-longitudinal-mode (SLM) operation at each wavelength without mode hopping. In CCS, high-quality triple-ring passive resonator employed achieve SLM high-birefringence Bragg grating combined with...
Femtosecond lasers can be used to create many functional devices in silica optical fibers with high designability. In this work, a femtosecond laser-induced scattering fiber (HSF) randomly distributed centers is effectively compress the linewidth of laser for first time. A dual-wavelength, single-longitudinal-mode (SLM) erbium-doped (EDFL) constructed demonstration, which capable switching among two single-wavelength operations and one dual-wavelength operation. We find that delayed...