A5100321651- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Advanced Photonic Communication Systems
- Optical Network Technologies
- Advanced Fiber Laser Technologies
- Photorefractive and Nonlinear Optics
- Conducting polymers and applications
- Solid State Laser Technologies
- Acoustic Wave Resonator Technologies
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Photonic Crystals and Applications
- Optical Systems and Laser Technology
- GaN-based semiconductor devices and materials
- Microwave Engineering and Waveguides
- Mechanical and Optical Resonators
- Laser-induced spectroscopy and plasma
- Advanced Fiber Optic Sensors
- Embedded Systems and FPGA Design
- Underwater Vehicles and Communication Systems
- Cultural Heritage Materials Analysis
- Advanced machining processes and optimization
- Distributed Sensor Networks and Detection Algorithms
- Wireless Networks and Protocols
- Indoor and Outdoor Localization Technologies
University of Chinese Academy of Sciences
2020-2025
Chinese Academy of Sciences
2015-2025
Institute of Optics and Electronics, Chinese Academy of Sciences
2010-2025
Shanghai Institute of Microsystem and Information Technology
2016-2024
ShanghaiTech University
2022-2024
Dalian National Laboratory for Clean Energy
2024
Collaborative Innovation Center of Chemistry for Energy Materials
2024
Dalian Institute of Chemical Physics
2024
University of Science and Technology of China
2015-2024
Institute of Acoustics
2024
Single-crystalline GaN-based light-emitting diodes (LEDs) with high efficiency and long lifetime are the most promising solid-state lighting source compared conventional incandescent fluorescent lamps. However, lattice thermal mismatch between GaN sapphire substrate always induces stress density of dislocations thus degrades performance LEDs. Here, growth high-quality low a on graphene (Gr) buffered is reported for high-brightness blue Gr films directly grown to avoid tedious transfer...
A multipulse and multipoint Nd:YAG (neodymium-yttrium aluminum garnet) laser Thomson scattering diagnostic system was developed on EAST to obtain more accurate electron temperature Te density ne profiles. In this paper, the optical system, VME (versa module eurocard)-based real-time computer for control, data acquisition, analysis calibration are discussed in detail. Furthermore, a processing method is presented.
The arbitrary ratio power splitter is widely used in photonic integrated circuits (PICs), for signal monitoring, equalization, feedback, and so on. Here we designed a fabrication-tolerant, compact, broadband, low-loss splitter. proposed was realized with an adiabatically tapered silicon rib waveguide 70 nm shallow etches <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="normal">S</mml:mi> </mml:mrow> <mml:msub>...
Laser wireless power transfer (LWPT) offers a transformative approach to energy transmission, addressing critical limitations in unmanned aerial vehicles (UAVs) such as battery limitation. However, challenges like beam divergence, non-uniform irradiation, and alignment instability limit its practical application. Here, we present lightweight air-floating metalens platform overcome these barriers. This innovative lens focuses laser beams near the photovoltaic receiver with an distribution...
Due to the scarcity of licensed spectrum allocated for mobile communication systems, licensed-assisted access long-term evolution (LAA-LTE) network is recently proposed deploy in unlicensed spectrum, which currently occupied by different Wi-Fi systems. It a very challenging problem ensure fair coexistence between LAA-LTE and networks, terms sharing traffic management. To solve this problem, downlink management (FDTM) scheme paper hybrid LAA-LTE/Wi-Fi networks. FDTM aims tune minimum...
A 24.6 kW quasi-continuous-wave (QCW) Nd-doped yttrium aluminum garnet (Nd:YAG) slab laser is proposed in this Letter. The based on a stable-unstable hybrid cavity. stable and an unstable resonator were constructed along orthogonal directions the aperture of slab. Due to features cavity, achieves both high efficiency power extraction with excellent beam quality compactness simplicity. Average output 47% optical-to-optical achieved experiment. 1.5 times diffraction limits after correction...
Here, we designed a broadband, low loss, compact, and fabrication-tolerant silicon-based four-mode edge coupler, composed of 1×3 adiabatic mode-evolution counter-taper splitter triple-tip inverse taper. Based on mode conversion power splitting, the proposed structure can simultaneously realize efficient coupling from TE0, TM0, TE1, TM1 modes multimode silicon waveguides to linearly polarized (LP), LP01,x, LP01,y, LP11a,x, LP11a,y, in few-mode fiber. To best our knowledge, first scheme four...
We report a new approach to effectively improve the optical-to-optical efficiency for quasi-continuous-wave (QCW) lasers by adjusting pump pulse duration. During our single-slab laser test, an conversion of 57% and slope 67.8% are obtained with maximum average output power 7.3 kW, operating at repetition rate 160 Hz 470μs To best knowledge, this represents highest QCW face-pumped Nd:YAG slab such high ever reported.
A low-order wavefront aberration self-compensation high power Nd:YAG slab laser module is developed and demonstrated. By numerical simulating the thermal distribution transmission of medium, a thermally-compensated heat removal geometry to reduce distortion. This method allows non-uniform cooling flatten gradient in width direction slab. using optimized gain as an amplifier, output 7.8 kW achieved. Compared traditional module, 7.3 kW, peak-to-valley (PV) value distortion reduced from 17.21...
This article presents lithium niobate (LiNbO3) based on shear horizontal (SH0) resonators, utilizing a suspended structure, for radio frequency (RF) applications. It demonstrates the design, analysis, and fabrication of SH0 resonators 36Y-cut LiNbO3 thin film. The spurious-free resonator achieves an electromechanical coupling coefficient (kt2) 42.67% quality factor (Qr) 254 at wave-propagating orientation 0° in plane.
It is crucially important to establish an accurate model represent the relationship between actuator forces and lap surface changes when polishing a large highly aspheric optical surface. To facilitate computer-controlled process, neural network based stressed shape was developed. The developed reflects dynamic deformation of lap. original data from microdisplacement sensor matrix were used train model. experimental results show that proposed can accurately provide analytical be polish...
Wepropose and experimentally demonstrate the ultra-compact mode (de)multiplexers polarization beam splitter (PBS) based on tapered bent asymmetric directional couplers. The strong coupling strength introduced by waveguides significantly shortens length. As a result, high conversion efficiencies over broad bandwidth can be obtained with small footprint. length of fabricated PBS are less than 4.9 μm 8.7 μm, respectively. From 1534-1600 nm, measured insertion loss (IL) is 1.4 1.55 dB for TE...
How to fabricate micro-scale 3D structures with an efficient method is the key issue achieve many long-pursuit exciting goals, such as direct printing make human organs and fabrication of integrated photonic circuits. Two-photon polymerization (2PP) more competitive than other methods because it unique approach capable acquire around 100 nm resolution tiny structures, which are fundamental components in these applications. However, photoresist used this lacks material properties fulfill...
A silicon-on-insulator polarization diversity scheme is proposed. Based on an asymmetrical evanescent coupler, a broadband and compact splitter-rotator comprising mode conversion tapers sorting asymmetric Y junctions optimized with silicon dioxide upper cladding nitride waveguide. The simulation results show loss less than 0.2 dB, the extinction ratio lower -17dB in wavelength range of 1.48µm to 1.67µm.
Four methods based on a multimode interference (MMI) structure are optimally designed to flatten the spectral response of silicon‐on‐insulator‐ (SOI‐) arrayed‐waveguide grating (AWG) applied in demodulation integration microsystem. In design for each method, SOI is selected as material, beam propagation method used, and performances (including 3 dB passband width, crosstalk, insertion loss) flat‐top AWG studied. Moreover, output spectrum responses AWGs with or without flattened compared. The...
For reshaping aperture size and correcting low-order aberration of laser beams with large aspect ratios, a simplified analytical method is proposed to design an anamorphic refractive shaping system, which composed double-plane symmetric lenses. The enables performing global study aberrations via calculating the primary wave function under paraxial approximation. balance analyzed three-lens collimating system compact four-lens expanding system. Lens bending conic surfaces are introduced...
We experimentally demonstrate a low-loss and lowcrosstalk 16-channel 200 GHz-channel-spacing arrayed waveguide grating router (AWGR) with size of 0.67 × 0.37 mm 2 , targeting for C-band wavelength division multiplexing (WDM) interconnect routing applications.As result, the AWGR features channel spacing 200±10 GHz, free spectral range 25.62 nm 3 dB bandwidth 0.9 nm.Based on comprehensive optimal design, measured characterization revealed 5.55 maximum loss non-uniformity 1.13 best-case...
We design and demonstrate a birefringent Michelson interferometer based interleaver with ultra-low dispersion low cost. The consists of polarizing beam splitters (PBS's) quarter-wave plates half-wave plates. PBS's interferometers provide the optical path difference for interference between two orthogonal polarization components needed to minimize ripple output. designed two-stage in 50 GHz channel spacing application exhibits 0.5 dB passband 25 stopband both 27 GHz; isolation higher than 35...
The point-to-point key distribution technology based on twinning semiconductor superlattice devices can provide high-speed secure symmetric keys, suitable for scenarios with high security requirements such as the one-time pad cipher. However, deploying these and scaling them in complex scenarios, many-to-many communication, poses challenges. To address this, an effective solution is to build a network communication by selecting trusted relays between them. larger network, higher likelihood...