Ji Fan

University of Chinese Academy of Sciences

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Tao Liu

Dalian University of Technology

Xiaoli Zhang

North Minzu University

Hui Zhao

China Meteorological Administration

Yongcan Shuang

Dalian University of Technology

Zhen Guo Zhang

Xuzhou Medical College

Xiaopeng Li

Harbin Engineering University

Zhi Qiang Jiao

Zhongyuan University of Technology

Yan Huo

Shenyang University

Yonghong Tan

Shanghai Normal University

Robert Freer

University of Manchester

Cooperative Institutions

Chinese Academy of Sciences

Dalian University of Technology

Zhongyuan University of Technology

Shanghai Jiao Tong University

Tsinghua University

University of Chinese Academy of Sciences

Fudan University

Changchun Institute of Optics, Fine Mechanics and Physics

Shandong University

Northwestern Polytechnical University

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Compact high-repetition-rate Yb: YAG thin-disk regenerative amplifier

Zhidong Yao Jinghua Yu Junjie Sun X. Zhang Yiwen Zhang

Regenerative amplifiers based on thin-disk technology have a high-beam quality output laser due to their own excellent thermal management. Conventional thin-disk regenerative amplifiers are usually constructed in a stable resonator design with a long resonator length, which limits the practical application range and further industrialization. We report a compact thin-disk regenerative amplifier with an overall resonator length of less than 2.5 m that enables high-beam-quality laser output. Continuous laser output of 66 W when the resonator is 2.16 m. 59 W of a pulsed laser with a repetition rate of 50 kHz was output at a resonator length of 2.3 m. The thin-disk regenerative amplifier has the potential to output a laser up to 100 mJ while maintaining good beam quality

Thin disk

Regenerative amplification

Disk laser

10.1117/12.3047723

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Deep Learning-Based Binocular Image Analysis for In Situ Measurement of Particle Length Distribution During Crystallization Process

IEEE Transactions on Instrumentation and Measurement (2023)

Ji Fan Tao Liu Yongcan Shuang Song Bo Junghui Chen

To resolve the challenge of measuring particle length distribution (PLD) during crystallization process via image analysis, a novel in situ measurement method with deep learning-based binocular image analysis is proposed in this paper. Firstly, a non-invasive binocular telecentric imaging scheme is designed for in situ measurement. Then a matching algorithm is presented to find the spatial correspondences between crystal images from a binocular image pair, by developing a telecentric stereo image rectification strategy together with a deep learning-based oriented object detection algorithm. Subsequently, the three-dimensional (3-D) space length of each identified crystal is reconstructed by integrating 2-D projected information from two matched crystal boxes in the binocular image pair, so as to acquire measurement accuracy on each crystal length. The proposed binocular imaging scheme and 3-D reconstruction method are validated by in situ measurement of a micro-checkerboard plate inserted into a cooling crystallizer. Experimental results on the cooling crystallization process of β-form L-glutamic acid demonstrate that the measurement accuracy on PLD is evidently improved with the mean absolute percentage errors smaller than 4.2%, compared to the recently developed methods.

Accuracy and precision

10.1109/tim.2023.3330217

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Citations (4)

The Electrical Properties and Impedance Analysis of ZnO Varistors Doped with Different Cu<sub>2</sub>O Contents

Applied Mechanics and Materials (2014)

Ji Fan Hui Zhao Xiaoli Zhang

The Cu 2 O addition deteriorates the electrical properties of ZnO varistors, which is a good agreement with similar findings on Ag 2 O additions. The best fitted impedance analysis reveals that the Cu 2 O addition increases grain resistance and lowers the grain boundary resistance, results in low nonlinearity and higher leakage current of ZnO varistors.

Varistor

10.4028/www.scientific.net/amm.681.173

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A New Method for Processing Ceramics with Cracked Glaze

Advanced materials research (2011)

Ji Fan Xiaopeng Li Zhao Jun Zhang Wang Xi Zhang Zhi Qiang Jiao

Laser processing ceramic materials is a new application of laser technique. This paper presents the study of making cracked glaze surface by laser processing. Proposed the applicable the composition of glaze, the main processing parameters of laser processing, and discussed the factors which may affect the quality of cracked glazing surface. It indicates that laser processing could be a new and easy processing method to produce the cracked glazing on the ceramic surface.

Glazing

Ceramic glaze

Materials processing

10.4028/www.scientific.net/amr.418-420.63

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Compact high-repetition-rate Yb: YAG thin-disk regenerative amplifier with fundamental transverse mode laser output

Optics Express (2024)

YAO Zhi-huan Jinghua Yu Yi Chen Junjie Sun Yiwen Zhang

Regenerative amplification

Repetition (rhetorical device)

Solid-state laser

10.1364/oe.543894

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The electrical properties and d.c. degradation characteristics of silver doped ZnO varistors

Journal of Materials Science (1993)

Ji Fan Robert Freer

Varistor

Degradation

10.1007/bf01191983

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Citations (41)

The Effects of Sintering Temperature on the Properties of Mg-Mn-Zn Ferrites

Advanced materials research (2013)

Ji Fan Wen Qing Li Hui Zhao Xiaoli Zhang Zhen Guo Zhang

The present work shows the results of investigation on the effects of sintering temperatures of (Mg0.25Mn0.1Zn0.65)Fe2O4 ferrite on its sintered density, initial permeabilty, resistivity and microstructure. To achieve better sintered density and initial permeabilty, the sintering temperature should be ≥1200oC. However, the higher sintering temperature results in larger the grain size, which causes the reduction of the resistivities of Mg-Mn-Zn ferrites. Furthermore, the resistivities of samples are environmental temperature sensitive, and possibly possess the similar function of NTC thermistor over the testing range 25-225oC.

Thermistor

Atmospheric temperature range

10.4028/www.scientific.net/amr.680.31

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Citations (6)

The Effects of Cu Dopant on the Microstructure and Non-Ohmic Electrical Properties of ZnO Varistors

Advanced materials research (2011)

Ji Fan Xiaopeng Li Zhen Guo Zhang Zhi Qiang Jiao Xiangyang Liu

The doping effects of Cu on the microstructure and non-ohmic electrical properties of ZnO varistors were studied. Addition of Cu 2 O can enhance the ZnO grain growth during sintering. The SEM and EDS results revealed that the added Cu mainly distributed in the grain boundary and spinel phases of ZnO varistors. The Cu 2 O addition increased the both of grain and grain boundary resistances. However it decreased the non-ohmic electrical characteristics of ZnO varistors, which is a good agreement with similar findings on Ag 2 O additions, but contrasts to the reports of good non-ohmic electrical property which found on binary Cu doped ZnO varistors.

Varistor

Ohmic contact

10.4028/www.scientific.net/amr.343-344.160

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Citations (1)

In Situ Calibration of Binocular Vision System for 3-D Measurement of Particle Size during Crystallization

IEEE Transactions on Instrumentation and Measurement (2024)

Yongcan Shuang Ji Fan Tao Liu Yonghong Tan

Particle (ecology)

10.1109/tim.2024.3470016

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