A5042422666- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Advanced Fiber Optic Sensors
- Optical Network Technologies
- Gold and Silver Nanoparticles Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Laser-Matter Interactions and Applications
- Photonic and Optical Devices
- Solid State Laser Technologies
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced biosensing and bioanalysis techniques
- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Photorefractive and Nonlinear Optics
- Advanced Photonic Communication Systems
- Gas Sensing Nanomaterials and Sensors
- Photonic Crystals and Applications
- Supercapacitor Materials and Fabrication
- Photoacoustic and Ultrasonic Imaging
- Quantum optics and atomic interactions
- Molecular Communication and Nanonetworks
- Spectroscopy and Laser Applications
- Near-Field Optical Microscopy
- Embedded Systems and FPGA Design
- Magnesium Oxide Properties and Applications
University of Science and Technology of China
2012-2024
Anhui Institute of Optics and Fine Mechanics
2012-2024
Chinese Academy of Sciences
2013-2024
Hefei Institutes of Physical Science
2023-2024
Advanced Laser Technology (United Kingdom)
2022
Hefei University
2015-2017
Wilfrid Laurier University
2001-2005
Southeast University
1999-2003
Southeastern University
1994
We propose a new concept to produce switchable multiwavelength oscillations with cascaded fiber Bragg grating overlapping cavity erbium-doped laser. The laser can be designed operate in or wavelength switching modes. different lines have thresholds. For three-wavelength oscillation, the output powers are linear piecewise functions of input pump power. An variation only 1.5 dB has been achieved an power 100 mW. switching, three single-wavelength and two dual-wavelength operation regions...
This article demonstrates theoretical design of ultracompact all-optical AND, NAND, OR, and NOR gates with two-dimensional nonlinear photonic crystal slabs. Compound Ag-polymer film a low refractive index large third-order nonlinearity is adopted as our material cavities relatively high quality factor about 2000 designed on this polymer slab. Numerical simulations show that logic pump-power in the order tens MW/cm2 can be achieved. These results may provide very useful schemes approaches for...
In this work, we present a novel concept of structural design for the synthesis new type core/shell structure comprising γ-MnO2 cores inside hollow α-MnO2 shells. The approach involves two main steps. First, MnCO3 microellipsoids were mixed directly with KMnO4 solution, which lead to manganese oxide shell on surface MnCO3. Then, thermal annealing resulted in formation γ-MnO2/α-MnO2 ellipsoids, accompanying phase transition both core and shell. as-prepared ellipsoids used as adsorbent water...
A widely tunable single longitudinal mode (SLM) fiber laser with cascaded Type I and II ring secondary cavities, which uses a Bragg grating (FBG) as the mode-restricting wavelength-tuning element, is proposed demonstrated. Since rings can effectively expand pass-band spacing to make selection FBG easier, stability of SLM oscillation be improved by suitably optimizing coupling ratio optical couplers in ensure that at least one only dominates selected pass-band. When lengths are designed their...
Optical fiber-Raman devices integrated with plasmonic nanostructures have promising potentials for in situ probing remote liquid samples and biological samples. In this system, the fiber probe is required to simultaneously demonstrate stable surface enhanced Raman scattering (SERS) signals high sensitivity toward target species. Here we a generic approach integrate presynthesized tapered probes that are prepared by dipping-etching method, through reversed electrostatic attraction between...
Fibre surface-enhanced Raman scattering (SERS) probes have the advantages of flexibility, compactness, remote sensing capability and good repeatability in SERS detection thus a range different applications. However, it is difficult to realize simple, low-cost high-throughput preparations fibre with high sensitivity desirable using currently available fabrication techniques, which restricts their practical We report here method laser-induced self-assembly fast excellent reproducibility. By...
A surface-enhanced Raman scattering (SERS) tapered fiber probe has been developed by using a chemically-etched tip and silanization of the surface taper, followed hydrothermal growth silver nanoparticles (AgNPs) on silanized taper. 4-Aminothiophenol (4-ATP) was selected as target analyte to study SERS responses prepared in an optrode remote detection mode. The experimental results show that exhibited ability detect 4-ATP molecule at concentration low 10-9 M good reproducibility with relative...
Multiwavelength oscillations in erbium-doped fiber (EDF) lasers with active overlapping linear cavities are investigated detail. The laser can be designed to produce multiwavelength the C-band and L-band. With a three-wavelength laser, experiments show that output powers of lasing lines increase linearly or piecewise pump input. Any one wavelength tuned over several nanometers depending on gain tilt vicinity while oscillation is still being maintained. power any specific line adjusted by...
The figure-9 fiber laser exhibits excellent performance, but improvement of its output pulse energy is restricted by the structure design that ensures self-starting mode-locking. In this paper, we propose and verify a novel method to increase laser. By reducing linear phase shift step-by-step in synchronously increasing pump power, can be increased while always operate single-pulse mode-locking region. Using 112-MHz dispersion-managed soliton laser, effectiveness our proposed verified, has...
The process of depositing nanoparticles onto tapered fiber probes with the laser-induced chemical deposition method (LICDM) and surface-enhanced Raman scattering (SERS) detection performance prepared are experimentally investigated in this paper. Our results show that nanoparticle-deposited LICDM depend strongly on value cone angle. For small-angle areas only focused at taper tips, because surfaces mainly covered by a relatively low-intensity evanescent field. By lengthening reaction time or...
The authors investigate the optical bistability in an L-band dual-wavelength erbium-doped fiber (EDF) laser with overlapping cavities. bistable input-output hysteresis behavior of two lasing wavelengths evolves antiphase. region is tens milliwatts wide. essentially due to homogeneous saturable absorption EDF. cross-gain saturation causes bistabilities lines evolve antiphase respect each other. gain clamping effect helps widen region, which may be controlled by cavity loss and EDF length.
We report on surface-enhanced Raman scattering (SERS) fiber probe based silver nanoplates which are fabricated the tapered tip of multimode fiber, by a simple, effective and low-cost hydrothermal method. The field-emission scanning electron microscopy transmission show that obtained is composed with thickness about 40 nm an average length 300 nm. SERS activity optimal cone angle has demonstrated excellent results using probing molecule 4-aminothiophenol.
In this paper we report a fiber-type widely tunable CW mid-IR DFG/QPM laser source based on periodically poled MgO-doped LiNbO3 (PPMgLN), which uses ytterbium-dope fiber (YDFL) as the pump and erbium-dope (EDFL) cascaded with an erbium-doped amplifier (EDFA) signal source. Our experimental results show that, PCs to adjust polarization orientations being parallel crystal principle optical axis conversion efficiency may be optimized. The beam spots their longitudinal evolution behaviors...
The silanized fiber probe with the optimal laser-induced growth time exhibited very strong SERS activity and good measurement reproducibility.
The operation mechanism and the pulse property of an actively Q-switched erbium-doped fiber laser based on acousto-optic modulator (AOM) switch with injection seeding technique are investigated. Our results show that pulses can be locked to oscillate near a fixed frequency higher than seed laser, though frequency-shift effect AOM impedes stable cavity mode oscillations. such Q-switch lasers explained by mutual locking-in among shifted components originated from injected coherence help gain...
A wide tuning technique for mid-IR difference-frequency generation (DFG) with uniform grating periodically poled LiNbO(3) (PPLN) is presented. Based on the dispersion property of PPLN, quasi-phase matching (QPM) band pump can evolve to two separate bands, and spacing between them be increased decrease crystal temperature. Two such QPM bands used increasing idler range when temperature set adapt tuning. With technique, an 690nm experimentally achieved fiber laser fundamental lights.
With a fiber pigtailed electro-optic modulator as the active Q-switch, mode-hopping-free single-longitudinal-mode pulses are generated by ring cavity laser based on injection seeding technique. The experimental results show that oscillating properties of may be determined power and center frequency seed rather than Q-switch waveform modulation frequency. injected 200 μW, Q-switched with repetition rate pulse width from 1 to 100 kHz, 50 400 ns achieved laser. output linewidth can narrowed...
This paper proposes and demonstrates a method to reduce the repetition rate of all- polarization-maintaining (PM) linear-cavity picosecond dissipative soliton passively mode-locked fiber lasers. An optical coupler (OC) is inserted into cavity extract pulse energy, length increased using low-nonlinear coefficient large-mode field at rear end OC, where propagated has lower energy. enables nonlinear phase shift be within tolerated value single mode-locking even with considerably length; this...
Towards realizing the future quantum internet, a pivotal milestone entails transition from two-node proof-of-principle experiments conducted in laboratories to comprehensive, multi-node setups on large scales. Here, we report debut implementation of entanglement-based network over metropolitan area. We equipped three nodes with atomic memories and their telecom interfaces, combined them into scalable phase-stabilized architecture through server node. demonstrated heralded entanglement...
A new mechanism to tune an erbium-doped fiber laser in the L-band is presented. The technique based on dual-wavelength bistability overlapping linear cavities, which allows two lasing lines be switched from one another by a triggering pulse superimposed dc bias current applied pump source. wavelengths can independently tuned give total tuning range of 33 nm that covers whole L-band, while either tunable Bragg gratings (FBGs) used only half range. An output dynamic 7 dB, and maximum power up...
A mid-IR multiwavelength difference frequency generation (DFG) laser source with fiber fundamental lights is demonstrated by using the dispersion property of PPLN to broaden quasi-phase-matching (QPM) acceptance bandwidth (BW). Our results show that QPM BW for pump YDFL much larger than signal EDFL. Using a and single-wavelength EDFL as lights, DFG can simultaneously emit 14 wavelengths spacing nm at fixed temperature. Moreover, lasing lines be synchronously tuned between 3.28 3.47 microm.