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学者姓名：王智勇
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摘要 ：
在半导体激光器的光纤耦合系统中,bar条的各发光点指向偏差(偏向角)会恶化光束整形效果,显著降低光纤耦合效率。针对该现象提出利用引入修正角的楔形整形镜补偿发光点的指向偏差,改善激光束的指向性和光束整形效果。通过ZEMAX软件模拟与实验验证,在光纤耦合系统中使用引入修正角后的楔形整形镜片,其整形效果显著改善,测量的光束参数积(BPPs)在快轴和慢轴方向分别为7.25 mm·mrad和5.05 mm·mrad,聚焦光斑为148μm×135μm(包含90%能量)。该系统将单个bar条耦合进芯径200μm、数值孔径(NA)0.2的光纤中,在注入电流60 A时,获得稳定输出功率53 W,对应电-光转换效...
关键词 ：
楔形整形镜 楔形整形镜 半导体激光器 半导体激光器 光束整形 光束整形 光纤耦合 光纤耦合
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| GB/T 7714 | 郭照师 , 秦文斌 , 李景 et al. 基于楔形整形镜对半导体激光的光纤耦合 [J]. | 发光学报 , 2021 , 42 (01) : 98-103 . |
| MLA | 郭照师 et al. "基于楔形整形镜对半导体激光的光纤耦合" . | 发光学报 42 . 01 (2021) : 98-103 . |
| APA | 郭照师 , 秦文斌 , 李景 , 刘友强 , 曹银花 , 孟娇 et al. 基于楔形整形镜对半导体激光的光纤耦合 . | 发光学报 , 2021 , 42 (01) , 98-103 . |
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摘要 ：
As the main source of heat loss of flat-plate solar air collectors (FPSACs), single glazing cover reduces the thermal performance of FPSAC. This situation becomes serious when the ambient temperature is low or the inlet temperature is high. A double glass cover with good thermal insulation is a good solution. This work aims to investigate the thermal performance of double glazing FPSAC at low ambient temperature and high inlet temperature. The thermal performance of four FPSACs with single glazing (Model 1), double glazing filled with air (Model 2), double glazing filled with argon (Model 3), and vacuum glazing (Model 4) as the glass cover at different ambient temperatures, different heat transfer air (HTA) inlet temperatures, and different HTA volume flow rates are studied and compared. Result demonstrates that Models 2, 3, and 4 have better thermal performance at low ambient temperature and high inlet tem-perature compared with Model 1. When the inlet temperature is 65 degrees C and ambient temperature is -10 degrees C, the thermal efficiencies of Models 2, 3, and 4 are 1.65, 1.72, and 2.29 times higher than that of Model 1, respectively. The efficiency factor and total heat loss coefficient of Model 4 are 0.62707 and 2.21745, respectively. (C) 2021 Elsevier Ltd. All rights reserved.
关键词 ：
Flat-plate solar air collector Flat-plate solar air collector Numerical simulation Numerical simulation Vacuum glazing Vacuum glazing Double glazing Double glazing
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| GB/T 7714 | Chen, C. Q. , Diao, Y. H. , Zhao, Y. H. et al. Numerical evaluation of the thermal performance of different types of double glazing flat-plate solar air collectors [J]. | ENERGY , 2021 , 233 . |
| MLA | Chen, C. Q. et al. "Numerical evaluation of the thermal performance of different types of double glazing flat-plate solar air collectors" . | ENERGY 233 (2021) . |
| APA | Chen, C. Q. , Diao, Y. H. , Zhao, Y. H. , Wang, Z. Y. , Zhu, T. T. , Wang, T. Y. et al. Numerical evaluation of the thermal performance of different types of double glazing flat-plate solar air collectors . | ENERGY , 2021 , 233 . |
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摘要 ：
针对半导体激光阵列的发光单元指向性偏差导致快轴光束质量显著劣化的现象,研究了发光单元指向性偏差对快轴光束质量的影响,提出了一种利用微光学元件补偿发光单元指向性偏差的方法,设计了一种楔形微透镜阵列,可实现单个bar条的光束耦合进芯径200μm、NA=0.2的光纤.模拟计算结果表明,楔形微透镜阵列的补偿作用可使半导体激光阵列快轴方向的光参数积由64.24 mm·mrad下降到58.14 mm·mrad,光纤耦合效率达到95.6％,相比补偿前提高了10.4％.为降低工艺难度,采用分类补偿的方法,模拟光纤耦合效率达到91.5％.考虑到工业应用,采用由三片楔形透镜组成的透镜组对分类后的发光单元光束分别进行补偿,测量得到的光纤耦合效率为90.4％,比补偿光束指向性之前的耦合效率提高了约7％.
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| GB/T 7714 | 孟娇 , 曹银花 , 秦文斌 et al. 基于楔形微透镜补偿半导体激光阵列指向偏差 [J]. | 激光与红外 , 2021 , 51 (6) : 760-765 . |
| MLA | 孟娇 et al. "基于楔形微透镜补偿半导体激光阵列指向偏差" . | 激光与红外 51 . 6 (2021) : 760-765 . |
| APA | 孟娇 , 曹银花 , 秦文斌 , 刘友强 , 李景 , 郭照师 et al. 基于楔形微透镜补偿半导体激光阵列指向偏差 . | 激光与红外 , 2021 , 51 (6) , 760-765 . |
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摘要 ：
Hollow-core negative-curvature fibres have been the focus of current research, but how to reduce the loss of hollow-core negative-curvature fibres is a serious problem. This paper proposes a new structure of hollow-core negative-curvature fibres, that is numerically simulated using the finite-element method, and compared with the simulation results of hollow-core conjoined-tube negative curvature fibres (CTNCFs) and hollow-core nested anti-resonant nodeless fibres (NANFs). The results show that, the LP01 mode loss can reach 0.003694 dB/km with a transmission wavelength of 1.06 μm, the LP11 mode loss can be as low as 0.28423 dB/km, and the bending loss is 0.4405 dB/km with a bending radius of 5 cm and a transmission wavelength of 1.06 μm. The loss is reduced by an order of magnitude compared to CTNCFs and NANFs. © 2009-2012 IEEE.
关键词 ：
Fibers Fibers Transmissions Transmissions
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| GB/T 7714 | Yang, Boyi , Liu, Xuesheng , Jia, Wenzeng et al. Low Loss Hollow-Core Connecting-Circle Negative-Curvature Fibres [J]. | IEEE Photonics Journal , 2021 , 13 (1) . |
| MLA | Yang, Boyi et al. "Low Loss Hollow-Core Connecting-Circle Negative-Curvature Fibres" . | IEEE Photonics Journal 13 . 1 (2021) . |
| APA | Yang, Boyi , Liu, Xuesheng , Jia, Wenzeng , Liu, Shu , Mei, Kai , Ge, Tingwu et al. Low Loss Hollow-Core Connecting-Circle Negative-Curvature Fibres . | IEEE Photonics Journal , 2021 , 13 (1) . |
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摘要 ：
本发明公开了VCSEL相干阵列与MZI阵列片上集成的光芯片结构及制备方法，包括VCSEL相干阵列、MZI阵列和垂直耦合端口；MZI阵列包括集成在LNOI衬底上的光波导结构和电极结构，LNOI衬底由下到上依次包括支撑衬底层、掩埋绝缘体层、器件层和缓冲层，器件层制备有光波导结构，缓冲层制备有电极结构；LNOI衬底上开设深至支撑衬底层上表面的凹槽，垂直耦合端口置于凹槽内；垂直耦合端口包括依次连接的第一贴合段、倾斜段和第二贴合段，第一贴合段与光波导结构相连，第二贴合段下侧与支撑衬底层相接，倾斜段设有光栅耦合器；凹槽两侧的缓冲层上压焊集成有VCSEL相干阵列。本发明光芯片提高了系统的信息处理速率。
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| GB/T 7714 | 王智勇 , 李颖 , 兰天 . VCSEL相干阵列与MZI阵列片上集成的光芯片结构及制备方法 : CN202110114647.7[P]. | 2021-01-26 . |
| MLA | 王智勇 et al. "VCSEL相干阵列与MZI阵列片上集成的光芯片结构及制备方法" : CN202110114647.7. | 2021-01-26 . |
| APA | 王智勇 , 李颖 , 兰天 . VCSEL相干阵列与MZI阵列片上集成的光芯片结构及制备方法 : CN202110114647.7. | 2021-01-26 . |
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摘要 ：
研究了子光源为基模高斯光束的相干阵激光光束的传输特性.通过理论模拟不同传输距离处光束横截面光强分布,同时分析主瓣与旁瓣峰值光强的比值随传输距离的变化规律,提出了无纲的相干阵激光普适性传输因子α.当0＜α＜0.85时,随着a值不断增加,相干阵激光光束传输特性逐渐偏离Talbot效应,光束横截面光强极大峰数目逐渐变少;尤其是当α=0.85时,光束横截面中心位置出现光强峰值高于其他极大峰的主瓣;当0.85＜α＜3π时,光束横截面的中心主瓣与旁瓣的峰值比逐渐增大,激光能量不断向主瓣集中;当α＞3π时,主瓣光强趋于稳定,主旁瓣峰值比的稳定值约21.5左右.
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| GB/T 7714 | 李尉 , 温丛阳 , 代京京 et al. 相干阵激光光束普适性传输因子的研究 [J]. | 光电技术应用 , 2021 , 36 (4) : 28-32 . |
| MLA | 李尉 et al. "相干阵激光光束普适性传输因子的研究" . | 光电技术应用 36 . 4 (2021) : 28-32 . |
| APA | 李尉 , 温丛阳 , 代京京 , 兰天 , 马淑芳 , 许并社 et al. 相干阵激光光束普适性传输因子的研究 . | 光电技术应用 , 2021 , 36 (4) , 28-32 . |
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摘要 ：
基于楔形整形镜对半导体激光的光纤耦合
关键词 ：
光束整形 光束整形 光纤耦合 光纤耦合 半导体激光器 半导体激光器 楔形整形镜 楔形整形镜
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| GB/T 7714 | 郭照师 , 秦文斌 , 李景 et al. 基于楔形整形镜对半导体激光的光纤耦合 [J]. | 郭照师 , 2021 , 42 (1) : 98-103 . |
| MLA | 郭照师 et al. "基于楔形整形镜对半导体激光的光纤耦合" . | 郭照师 42 . 1 (2021) : 98-103 . |
| APA | 郭照师 , 秦文斌 , 李景 , 刘友强 , 曹银花 , 孟娇 et al. 基于楔形整形镜对半导体激光的光纤耦合 . | 郭照师 , 2021 , 42 (1) , 98-103 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
将激光器阵列的各个子激光光源进行相干合成,从而获得相干阵激光输出,这是得到高光束质量、高功率激光输出的一种有效方法。根据光束质量国际标准,采用桶中能量(功率)比计算相干阵激光远场的光束桶半径,通过拟合得到相干阵激光光束传输的双曲线方程,从而计算出相干阵激光器光束质量M~2因子。计算结果表明,相干阵激光器的光束质量接近基模高斯光束的光束质量。
关键词 ：
光束质量 光束质量 相干合成 相干合成 相干阵激光器 相干阵激光器
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| GB/T 7714 | 李尉 , 温丛阳 , 叶征宇 et al. 两维相干阵激光器光束质量的计算 [J]. | 光电技术应用 , 2021 , 36 (05) : 77-80 . |
| MLA | 李尉 et al. "两维相干阵激光器光束质量的计算" . | 光电技术应用 36 . 05 (2021) : 77-80 . |
| APA | 李尉 , 温丛阳 , 叶征宇 , 代京京 , 兰天 , 王智勇 . 两维相干阵激光器光束质量的计算 . | 光电技术应用 , 2021 , 36 (05) , 77-80 . |
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摘要 ：
The application of self-healing property to cement-based materials promoted a long-term service time in engineering. In this study, dimethyl thio-toluene diamine (DMTDA) microcapsules were synthesized successfully through melting-dispersion-condensation techniques, and enabled crack closure thus recovering the mechanical property. The as-fabricated DMTDA microcapsules showed a core-shell structure and well-dispersed properties with a tailorable core fraction and diameter, (e.g., a diameter of 312.7 +/- 97.6 mu m and a shell thickness of 15.2 +/- 2.6 mu m under agitation rate of 300 RPM). It was found that DMTDA microcapsules had a high core fraction and good thermal stability. The introduction of microcapsules decreased the flowability of cement paste but remained integral structures during the mechanical agitation. The increase of microcapsule concentrations led to a significant drop in porosity but a slight decrease in compressive strength of cement paste. Most importantly, the addition of DMTDA microcapsules and isocyanates microcapsules in the cement paste could repair the early hydration cracks with a size less than 100 mu m, thereafter achieving a satisfying recovery of the compressive strength.
关键词 ：
Amine microcapsules Amine microcapsules Compressive strength Compressive strength Crack recovery Crack recovery Isocyanates Isocyanates Self-healing cement paste Self-healing cement paste
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| GB/T 7714 | Sun, Dawei , Ma Wenxu , Ma Jikun et al. The synthesis of DMTDA microcapsules and investigation of self-healing cement paste through an isocyanate-amine system [J]. | CEMENT & CONCRETE COMPOSITES , 2021 , 122 . |
| MLA | Sun, Dawei et al. "The synthesis of DMTDA microcapsules and investigation of self-healing cement paste through an isocyanate-amine system" . | CEMENT & CONCRETE COMPOSITES 122 (2021) . |
| APA | Sun, Dawei , Ma Wenxu , Ma Jikun , Yan, Jianhua , Mao Qianjin , Wang Yali et al. The synthesis of DMTDA microcapsules and investigation of self-healing cement paste through an isocyanate-amine system . | CEMENT & CONCRETE COMPOSITES , 2021 , 122 . |
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摘要 ：
Three-dimensional (3D) reconstruction of shapes is an important research topic in the fields of computer vision, computer graphics, pattern recognition, and virtual reality. Existing 3D reconstruction methods usually suffer from two bottlenecks: (1) they involve multiple manually designed states which can lead to cumulative errors, but can hardly learn semantic features of 3D shapes automatically; (2) they depend heavily on the content and quality of images, as well as precisely calibrated cameras. As a result, it is difficult to improve the reconstruction accuracy of those methods. 3D reconstruction methods based on deep learning overcome both of these bottlenecks by automatically learning semantic features of 3D shapes from low-quality images using deep networks. However, while these methods have various architectures, in-depth analysis and comparisons of them are unavailable so far. We present a comprehensive survey of 3D reconstruction methods based on deep learning. First, based on different deep learning model architectures, we divide 3D reconstruction methods based on deep learning into four types, recurrent neural network, deep autoencoder, generative adversarial network, and convolutional neural network based methods, and analyze the corresponding methodologies carefully. Second, we investigate four representative databases that are commonly used by the above methods in detail. Third, we give a comprehensive comparison of 3D reconstruction methods based on deep learning, which consists of the results of different methods with respect to the same database, the results of each method with respect to different databases, and the robustness of each method with respect to the number of views. Finally, we discuss future development of 3D reconstruction methods based on deep learning.
关键词 ：
Convolutional neural network Convolutional neural network Deep autoencoder Deep autoencoder Deep learning models Deep learning models Generative adversarial network Generative adversarial network Recurrent neural network Recurrent neural network Three-dimensional reconstruction Three-dimensional reconstruction TP391 TP391
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| GB/T 7714 | Liu, Caixia , Kong, Dehui , Wang, Shaofan et al. Deep3D reconstruction: methods, data, and challenges [J]. | FRONTIERS OF INFORMATION TECHNOLOGY & ELECTRONIC ENGINEERING , 2021 , 22 (5) : 652-672 . |
| MLA | Liu, Caixia et al. "Deep3D reconstruction: methods, data, and challenges" . | FRONTIERS OF INFORMATION TECHNOLOGY & ELECTRONIC ENGINEERING 22 . 5 (2021) : 652-672 . |
| APA | Liu, Caixia , Kong, Dehui , Wang, Shaofan , Wang, Zhiyong , Li, Jinghua , Yin, Baocai . Deep3D reconstruction: methods, data, and challenges . | FRONTIERS OF INFORMATION TECHNOLOGY & ELECTRONIC ENGINEERING , 2021 , 22 (5) , 652-672 . |
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