A5101747028- Glass properties and applications
- Photonic Crystal and Fiber Optics
- Solid State Laser Technologies
- Luminescence Properties of Advanced Materials
- Advanced Fiber Laser Technologies
- Advanced Fiber Optic Sensors
- Lanthanide and Transition Metal Complexes
- Phase-change materials and chalcogenides
- Ionosphere and magnetosphere dynamics
- Advanced biosensing and bioanalysis techniques
- VLSI and FPGA Design Techniques
- Electrochemical sensors and biosensors
- Advanced Nanomaterials in Catalysis
- 3D IC and TSV technologies
- Photorefractive and Nonlinear Optics
- Water Quality Monitoring and Analysis
- Advancements in Photolithography Techniques
- Laser Material Processing Techniques
- Inorganic Fluorides and Related Compounds
- GNSS positioning and interference
- Nuclear materials and radiation effects
- VLSI and Analog Circuit Testing
- Catalysis and Oxidation Reactions
- Radio Wave Propagation Studies
- Lexicography and Language Studies
Shanghai Institute of Optics and Fine Mechanics
2015-2024
Chinese Academy of Sciences
2015-2024
University of Chinese Academy of Sciences
2012-2024
Northwest Normal University
2024
Université Claude Bernard Lyon 1
2016
Centre National de la Recherche Scientifique
2016
High Magnetic Field Laboratory
2016
University of Wrocław
2016
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2016
École Polytechnique
2016
This paper presents a novel automated test case generation framework leveraging deep reinforcement learning (DRL) for chip verification. The addresses the growing complexity in modern designs where traditional verification methods must help achieve comprehensive coverage efficiently. Our approach implements custom Q-network architecture optimized processing feedback and generating vectors, incorporating an innovative reward mechanism that balances optimization with simulation efficiency....
The compositional dependence of the 1.8 μm emission properties Tm3+ ion-doped lead silicate glasses is investigated. Judd–Ofelt parameters are calculated and their variation with different glass modifier ions obtained. increase decreased ionic radius. A large spontaneous probability a cross-section found to be related strength ion. Fluorescence spectra analyzed using rate equations compared recorded data. results very close, indicating reliability this method. Non-radiative deduced by...
Yb3+/Al3+ co-doped silica glasses with different Ce2O3 contents were prepared using the sol–gel method combined high-temperature sintering. Changes in refractive index, absorption, emission and fluorescence lifetime of these caused by X-ray irradiation recorded analyzed systematically. It is found that co-doping certain amount Ce could greatly improve radiation resistance without evident negative effects on basic optical properties Yb3+ ions near-infrared region. The nature radiation-induced...
Large-size Al3+/Nd3+ co-doped silica glass with 5000 ppm Nd3+ and 50,000 Al3+ doping concentrations was prepared by the modified sol-gel method combined high-temperature melting molding technology. Electron probe micro-analyzer tests indicated that high homogeneity achieved this sample preparation method. The spectral properties of ions were evaluated. Nd3+-doped fiber (NDF) a core-to-clad ratio 20/125 μm drawn from preform as core. In laser oscillation experiment, maximum output power 14.6...
Ultrashort pulses at 920 nm are a highly desired light source in two-photon microscopy for the efficient excitation of green fluorescence protein. Although Nd3 + -doped fibers have been utilized 920-nm ultrashort pulse generation, competitive amplified spontaneous emission (ASE) 1.06 μm remains significant challenge improving their performance. Here, we demonstrate coordination engineering strategy to tailor properties silica glass and fiber. By elevating covalency between bonded anions via...
A series of Yb-doped silica glasses containing equimolar amounts P2O5 and Al2O3 were prepared using a sol–gel method combined with high-temperature sintering. Raman spectroscopy confirmed the formation AlPO4 join P/Al ratio 1. However, for slightly larger than 1, both P=O bond are formed. Based on absorption, emission spectra, electron paramagnetic resonance measurements, it was determined that increase concentration in glass leads to (i) decrease refractive index factor 1.1005 × 10−4 (which...
Upconversion emission materials have many advantages, such as narrowband sharp line emission, excellent photochemical stability, and long lifespan. In particular, under 980 nm invisible laser-beam irradiation, with visible light...
This paper reports, for the first time to our best knowledge, a nearly diffraction-limited output in Yb(3+)/Al(3+)/F(-) codoped double cladding silica fiber with 50 μm core diameter and 0.02 NA. The glass >6 mm was fabricated through solgel process combined high temperature sintering. Laser performances of this at different bend diameters were studied. mean M2<1.1 achieved 0.35 m. refractive index equal pure is suitable design, such as large-mode-area photonic crystal fiber.
In this study, Er 3+ /Yb /Al /P 5+ -doped silica (simplified as EYAPS) glasses with different P/Al ratios ranging from zero to infinity were fabricated via the sol-gel method combined high-temperature sintering. The absorption, emission and fluorescence lifetime of Yb ions well energy transfer efficiency recorded. composition-dependent macroscopic properties correlated glass structures, probed by pulse electron paramagnetic resonance (EPR) Raman spectroscopy. Results show that spectral their...
We develop an efficient green upconversion (UC) β-NaYF4:20%Yb3+,2%Er3+ microcrystal with well controlled morphology and size by hydrothermal method using two different chelating agents of CIT EDTA-2Na via a simple ion-exchange reaction. Importantly, the UC emission efficiency newly developed microcrystals is almost as strong that commercial counterpart solid-state method. A proof-of-concept waveguide demonstrated to extend their applications in modern micro-optoelectronics. The local...
We report on a modified sol-gel method combined with an innovative high-temperature melting technology for the preparation of Yb3+-doped silica glass rods (∅3−18 mm) high optical quality and low background loss. prepared Al-Yb, Al-P-Yb, Al-F-Yb, Al-P-F-Yb doped large mode area fibers (LMA) laser power core numerical aperture (0.02). were able to successfully solve doping homogeneity problem caused by volatility P F. More importantly, we developed purification reduced attenuation 0.05 dB/m....
Efficient NIR-to-NIR up-conversion emission (UCQY: 3.1%, 10 W cm<sup>−2</sup>) in β-NaYF<sub>4</sub>:Yb<sup>3+</sup>,Tm<sup>3+</sup> is obtained <italic>via</italic> ion-exchange for applications security.
A large-mode-area (LMA) ytterbium-doped photonic crystal fiber (PCF) with core NA of 0.034 and diameter 50 μm was made by the stack-and-draw technique. The is formed Yb3+/Al3+/F /P5+ co-doped silica glass containing 0.09 mol% Yb2O3 an absorption coefficient at 976 nm up to 3.2 dB/m. homogeneous distribution Yb3+ ions refractive index difference 4 × 10 compared pure prepared sol-gel method heat homogenization 2000°C. Laser power amplification this LMA PCF studied using a seed source 21 ps...
Highly Yb-doped silica glass with low refractive index for fabrication of large-mode-area photonic crystal fiber (LMA PCF) is in favor decreasing length and thus increasing the threshold nonlinear effects pulse laser amplification. Accordingly, fluorine incorporation highly vitally important to compensate sharp increase caused by ytterbium aluminum ions. In this work, doping concentration Yb/Al/P/F co-doped was significantly improved a modified sol-gel method combined high temperature...
This paper presents a new method for chip floorplanning optimization using deep learning (DRL) combined with graph neural networks (GNNs). The plan addresses the challenges of traditional floor plans by applying AI to space design and intelligent decisions. Three-head network architecture, including policy network, cost reconstruction head, is introduced improve feature extraction overall performance. GNNs are employed state representation extraction, enabling capture intricate topological...