- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Permanent photodoping of plasmonic gallium-ZnO nanocrystals
摘要： Donor dopants in oxide semiconductors are compensated not only by valuable electrons but also by other point defects, leading to a decrease in electric conductivity and infrared absorption. We demonstrate that the electron compensation mechanism in Ga doped ZnO nanocrystals can be promoted by photodoping. Unexpectedly, the electrons from photodoping are stable in the open air for months.
关键词： photodoping,infrared absorption,plasmonic,electron compensation,gallium-ZnO nanocrystals
更新于2025-09-19 17:13:59
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Performance Signature of Optical Fiber Communications Dispersion Compensation Techniques for the Control of Dispersion Management
摘要： This paper has deeply simulated the different configurations of pre, post, and symmetric dispersion compensation-based dispersion compensated fiber (DCF), Gaussian optic filter (GOF), and fiber Bragg grating. Output power, signal quality factor, and signal gain are the performance parameters in this study for the complete comparison for the proposed techniques for dispersion compensation. It is observed that FBG has presented the best performance parameters optimization in compared to other compensation techniques for different configurations of compensation. The FBG dispersion compensation technique is the key solution for dispersion compensation in compared with other compensation techniques that are comparatively as in previous section. It is observed that the FBG is the best dispersion compensation technique and change its location, and length, apodization, and chirp functions, to obtain the best performance of FBG and give the best quality factor, output power, and gain, FBG can be employed in different categories such as post compensation, pre compensation, and symmetric compensation with different FBG lengths, apodization, and chirp functions.
关键词： post compensation,FBG,and pre compensation,symmetric compensation,GOF,DCF
更新于2025-09-16 10:30:52
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Digital Magnetic Compass Integration with Stationary, Land-Based Electro-Optical Multi-Sensor Surveillance System
摘要： Multi-sensor imaging systems using the global navigation satellite system (GNSS) and digital magnetic compass (DMC) for geo-referencing have an important role and wide application in long-range surveillance systems. To achieve the required system heading accuracy, the specific magnetic compass calibration and compensation procedures, which highly depend on the application conditions, should be applied. The DMC compensation technique suitable for the operation environment is described and different technical solutions are studied. The application of the swinging procedure was shown as a good solution for DMC compensation in a given application. The selected DMC was built into a system to be experimentally evaluated, both under laboratory and field conditions. The implementation of the compensation procedure and magnetic sensor integration in systems is described. The heading accuracy measurement results show that DMC could be successfully integrated and used in long-range surveillance systems providing required geo-referencing data.
关键词： soft iron compensation,compass integration,swinging method,electro-optical surveillance system,hard iron compensation,measurement accuracy,magnetic heading angle,digital magnetic compass
更新于2025-09-16 10:30:52
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - 0.5 mm resolution distributed fiber strain sensor with a location-deviation compensation algorithm based on OFDR
摘要： We propose and demonstrate a 0.5mm spatial resolution distributed fibre strain sensor with a location-deviation compensation algorithm based on Optical Frequency Domain Reflectometry. This algorithm compensates for spatial location-deviation of the sensor and degenerated correlation of the Rayleigh spectra. Experimental results reveal a 0.5 mm spatial resolution at the 25 m fibre end, with 50000 equivalent sensors. The strain accuracy of ±15με is achieved in ±2500με using a polyimide-coated fibre. The distributed fiber sensor provides practical use in sensing applications.
关键词： location-deviation compensation,OFDR,0.5mm spatial resolution
更新于2025-09-16 10:30:52
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Micro-displacement Sensor with Temperature Compensation based on Double-ball Cascade and Fiber Bragg Grating
摘要： the with light of Bragg grating's According to the double-ball structure and the sensing characteristics of the fiber Bragg grating (FBG), a micro-displacement temperature sensor compensation is proposed and verified experimentally. The sensing structure is made of a FBG and a double-ball cascade. The first ball is used to excite the cladding mode, and the second can get the coupling interference between the cladding mode and the core mode. In inherent temperature characteristic, it can only be used to estimate temperature. The drift of single mode fiber transmission interference dip and Bragg grating spectrum are independent of each other. It reduces the influence of cross sensitivity between temperature and displacement. The experimental results show that the micro-displacement and temperature detection ranges are 0~0.16mm and 20~160°C; the micro-displacement and temperature sensitivities of the sensor are -89.892 nm/mm and -0.088 nm/°C, respectively. And the temperature sensitivity of FBG dip is 0.012 nm/°C. The with micro-displacement temperature-compensated by calculating the sensing matrix. measurement can obtained be
关键词： Fiber Bragg grating,Temperature compensation,Double-ball cascade,Micro-displacement
更新于2025-09-16 10:30:52
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Investigations on FM-to-AM modulation compensation using all-fibered wide-range tunable filter
摘要： An all-fibered wide-range tunable filter to compensate the frequency modulation to amplitude modulation (FM-to-AM) conversion in laser driver facility is investigated and demonstrated. The filter is based on polarization interference technology and the numerical model referred to Jones matrix method is developed. In the demonstrated compensation experiment, FM-to-AM index α is reduced from 16.78% to 3.12%.
关键词： laser driver facility,FM-to-AM compensation,tunable fibered filter
更新于2025-09-16 10:30:52
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Volumetric error measurement and compensation of three-axis machine tools based on laser bidirectional sequential step diagonal measuring method
摘要： This paper proposes an approach to the measurement, modeling, and compensation of the volumetric errors for three-axis machine tools, using the laser bidirectional sequential step diagonal measurement. Disparate measuring tracks are specially arranged for forward and backward paths, and the conforming error decoupling method is demonstrated. By decoupling, all the geometric errors which can result in the volumetric errors are distinguished simultaneously, containing translational and angular errors. In comparison with traditional unidirectional measuring method, the proposed bidirectional method distinguishes more geometric errors (the angular errors) by measuring the same four body diagonals. Uncertainty analysis based on the Monte Carlo simulation was conducted, followed by experimental validation on a vertical machining center. The experiment result indicates that the diagonal systematic deviation of positioning is reduced by 90% after volumetric compensation.
关键词： Bidirectional laser sequential step diagonal measurement,Machine tool error compensation,Volumetric error
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE Industry Applications Society Annual Meeting - Baltimore, MD, USA (2019.9.29-2019.10.3)] 2019 IEEE Industry Applications Society Annual Meeting - Enhancement of Fault ride through strategy for single-phase grid-connected photovoltaic systems
摘要： Increasing efficiency and decreasing cost of Photovoltaic (PV) panels has led to the rise of many PV Plants. Considering their evolution, Grid standards require PV systems to remain connected and support the grid by providing reactive power during a fault. In order to achieve this, a control system that provides Fault-Ride-Through (FRT) capability for grid-connected PV systems is proposed. The FRT requirements, i.e., injecting a minimum 2% reactive current for every 1% change in the voltage, and limiting the current overshoot of the voltage source converter switches are met by the designed controller. During a fault, when the active power of the PV plant is decreased, the controller allows reactive power to be injected into the grid. In case the fault prolongs over a certain stipulated time as described by grid codes then the PV system is disconnected from the grid until the fault is cleared. Simulations verify that the proposed control system achieves the FRT requirements when providing FRT for symmetrical and asymmetrical faults.
关键词： Grid-Connected PV system,Grid codes,Reactive power compensation,Fault ride through
更新于2025-09-16 10:30:52
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - A Nonlinear Tuning Compensation Method for OFDR Systems Based on Polynomial Regression Algorithm
摘要： A nonlinear tuning compensation method for optical frequency domain reflection systems based on polynomial regression algorithm is proposed in this paper. Simulation results demonstrate that this method has greatly improved the spatial resolution of measurement.
关键词： Distributed optical fiber sensing,Optical frequency domain reflection,Polynomial regression algorithm,Nonlinear tuning compensation
更新于2025-09-16 10:30:52
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[IEEE 2019 20th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM) - Erlagol (Altai Republic), Russia (2019.6.29-2019.7.3)] 2019 20th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM) - Distributed Series Impedance Devices Based on Controlled Transformer
摘要： The principles of designing of distributed series transformer with (DSI) based on impedance devices adjustable transformation ratio are considered. Analytical expressions for describing electromagnetic processes in various DSI schemes are obtained. The approaches to controlling of reactive power with adjustable transformer are described. Mathematical DSI model DSI based on controlled transformer in Matlab Simulink program is proposed and evaluated.
关键词： control,Power,compensation,power electronics,transformer
更新于2025-09-16 10:30:52