A5067118133- Advanced Fiber Optic Sensors
- Water Quality Monitoring and Analysis
- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Adsorption and biosorption for pollutant removal
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Recycling and utilization of industrial and municipal waste in materials production
- Municipal Solid Waste Management
- Electrochemical sensors and biosensors
- Metallurgy and Material Forming
- Pharmaceutical and Antibiotic Environmental Impacts
- Evaluation and Optimization Models
- Optical Coherence Tomography Applications
- 3D Shape Modeling and Analysis
- Wastewater Treatment and Nitrogen Removal
- Semiconductor Quantum Structures and Devices
- Environmental Engineering and Cultural Studies
- Advanced oxidation water treatment
- Photonic Crystals and Applications
- Blockchain Technology Applications and Security
- Water Quality and Pollution Assessment
- Electrochemical Analysis and Applications
- Carbon and Quantum Dots Applications
- Constructed Wetlands for Wastewater Treatment
Chengdu University
2004-2024
Xi'an Jiaotong University
2022-2024
China National Institute of Standardization
2021
Southern Methodist University
2017
Northwest University
2017
Masdar Institute of Science and Technology
2012-2013
Guangdong University of Technology
2011
China Leather and Footwear Industry Research Institute
2007
Environmental Protection Engineering (Greece)
1999
A 1080 nm single-polarization single frequency distributed Bragg reflector (DBR) fiber laser is fabricated by directly inscribing gratings (FBGs) in ytterbium-doped using a femtosecond laser. The high reflectivity FBG with birefringence prepared overexposure, serving polarizing element. low inscribed scanning axially along the to narrow bandwidth. This DBR avoided mode hopping as temperature variation and intracavity fusion loss. an output power greater than 11 mW, linewidth of 32 kHz,...
A high-temperature-resistant linearly polarized single-frequency distributed Bragg reflector fiber laser is demonstrated by using a femtosecond and directly fabricating pair of gratings (FBGs) into an erbium-doped (EDF). high-reflection FBG with high birefringence prepared overexposure used as polarization selector. The integrated resonator cavity 0.82 cm to ensure operation. After annealing treatment, the can work stably at 600°C, no mode hopping happens different temperatures. By residual...
We demonstrate a single-frequency fiber distributed Bragg reflector (DBR) laser operating at 1030 nm by using 1.1 cm long commercially available highly Yb-doped silica fiber. The DBR has threshold pump power of 5 mW, and the maximum output is over 160 mW with slope efficiency 27% relative to launched power. linewidth 6 kHz. With aid only amplifier stage, scaled up 306 51.5%.
We demonstrate a single longitudinal mode distributed Bragg reflection (DBR) fiber laser by directly fabricating gratings (FBGs) on an ytterbium-doped (YDF) using femtosecond laser. A simple optical self-injection feedback method was used to effectively compress the linewidth and reduce relative intensity noise (RIN) of DBR Further, we investigated effect cavity length reflectivity compression determined that tends decrease with increase external photon lifetime. By feedback, compressed from...
An equivalent surface current method is used to derive an analytic expression that approximates the coupling coefficient, reflectivity bandwidth, and group velocity for between identical nonidentical TE modes in asymmetric three-layer waveguide with a sinusoidal grating at one interface. The coefficient agrees expressions derived by two other methods contradirectional modes. results from analytical are compared numerically accurate Floquet-Bloch solution. expressions, which do not depend on...
This paper compared the measurement of ammonia and nitrogen in surface water by spectrophotometry flow injection analysis, results indicate: Nessler method detection range 0.02~2.0 mg/L, limit is 0.02mg/L; 0.01~ 10mg/L, 0.001mg/L, 50 samples analyzed rate samples/h; simple good linearity, sensitivity, precision accuracy can meet analytical requirement with better analysis speed, low consumption reagents samples, which a sensitive, selective friendly method, will be future development trend.
Fiber Bragg gratings and long-period fiber are widely used in optical communication systems sensing applications. These structures fabricated by UV-induced index changes along the core of a fiber, with fine control over grating period refractive profile. Further flexibility these can be achieved focused ion beam (FIB) techniques, fabricating through nano- micro-machining. FIB techniques enable fabrication larger contrast stronger interaction environmental samples (ideal for chemical...
In recent years, there have been frequent explosions and accidents in university chemistry laboratories. Laboratory research equipment are developing rapidly, but lab management safety learning still using the traditional way which is unreasonable unsafe. It need use big data related technology to solve disorganized protect effectiveness of safe learning.
In this paper, the soybean straw was modified into activated carbon adsorbent by chemical activation using zinc chloride as activator, and influence of pH on adsorption effect kinetic characteristics reactive brilliant red K-2BP under different dosage, oscillation speed temperature were investigated static experiments.In addition, date respectively fitted pseudo-first-order equation, pseudo-second-order equation intra particle diffusion equation.It found that could reach best decolorization...
Brewery wastewater was treated by UASB (up-flow anaerobic sludge blanket)-CASS (cyclic activated system)joint technology. After combination of (sewage)treatment structure design parameters, established a brewery treatment plant model, and explored the feasibility optimization process selection. During combined process, COD concentration decreased from 2500mg/L to 75mg/L, removal efficiency came 97%, BOD <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...
A low-cost Rayleigh backscattering sensing configuration is used to obtain high-resolution and real-time 2D maps of the directional surface strain on a fiberglass board. This approach has potential applications in 2D/3D structural health monitoring.
We propose and demonstrate a referencing scheme for dual-wavelength differential detection of tilted fiber Bragg grating sensors that compensates drift in the laser diode wavelength dynamic chirp, results 40 fm rms stability, refractive index change limit $3 \times 10 ^{-6}$.
Abstract Vitrification technology is one of the harmless treatment methods for hazardous waste containing heavy metals and other harmful substances, converting solid into vitreous residue with amorphous structure by high temperature melting. In this paper, we propose acid dissolution rate in acidic environment to characterize environmental stability molten residues. We have tested six melting residues from different enterprises. The results our experiments show that higher degree...
The current circular economy concept supports the recycling of organic wastes into value-added products. In this work, four typical including sewage sludge (SS), chicken manure (CM), food waste (FW), and corn straw (CS) were employed to produce hydrolysates augmenting shortcut nitrification-denitrification (SCND) for nitrogen depletion in wastewater. carbon-rich, with total COD (TCOD), soluble (SCOD), volatile fatty acids (VFA) concentrations ranging from 32.5 102.7, 5.7 48.4, 2.0 16.5 mg/L,...
Two AlGaAs/GaAs broadened waveguide laser structures, one asymmetric, nearly symmetric, were designed for high power at about 780 nm. The design concept is based on low losses and higher gain the fundamental mode with lower higher-order modes. To achieve these results, positions of quantum wells, thicknesses cladding layers, doping profiles, compositions all layers are carefully chosen. structures to have a loss 0.5/cm TE<sub>0</sub> more than 5 /cm order modes both structures. asymmetric...