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509 nm高功率宽调谐外腔面发射激光器

物理学报 2024年第12期73卷 198-204页

作者：王涛彭雪芳贺亮沈小雨朱仁江蒋丽丹佟存柱宋晏蓉张鹏重庆师范大学物理与电子工程学院重庆401331 中国科学院长春光学精密机械与物理研究所长春130033 北京工业大学理学部北京100124 重庆师范大学重庆国家应用数学中心重庆401331

报道了一种高功率宽调谐外腔面发射绿光激光器,利用设计的1018 nm半导体增益芯片、折叠镜以及后端镜构成结构紧凑的V型腔,使用长度为10 mm的Ⅰ类相位匹配三硼酸锂(liB_(3)O_(5),LBO)非线性频率变换晶体进行腔内倍频,实现了509 nm波长的... 详细信息

报道了一种高功率宽调谐外腔面发射绿光激光器,利用设计的1018 nm半导体增益芯片、折叠镜以及后端镜构成结构紧凑的V型腔,使用长度为10 mm的Ⅰ类相位匹配三硼酸锂(liB_(3)O_(5),LBO)非线性频率变换晶体进行腔内倍频,实现了509 nm波长的高功率绿光输出.通过在腔内插入双折射滤波片(birefringent filter,BRF),可获得连续调谐的激光波长.当BRF厚度为1 mm时,基频激光和倍频绿光的波长调谐范围分别为47.1 nm和20.1 nm.可调谐绿光的最大输出功率为8.23 W,对应的倍频转换效率为68.2%,相应的从吸收泵浦光到倍频绿光的光-光转换效率为16.6%.

关键词：外腔面发射激光器腔内倍频双折射滤波片可调谐

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高转换效率腔内倍频外腔面发射蓝光激光器

物理学报 2024年第1期73卷 174-180页

作者：伍亚东朱仁江晏日彭雪芳王涛蒋丽丹佟存柱宋晏蓉张鹏重庆师范大学物理与电子工程学院重庆401331 中国科学院长春光学精密机械与物理研究所长春130033 北京工业大学理学部北京100124 重庆师范大学重庆国家应用数学中心重庆401331

高功率高光束质量的蓝色激光在激光显示与照明、水下通信和成像、有色金属加工等许多领域具有广泛应用前景.本文利用增益芯片底部的高反镜分布布拉格反射镜、折叠镜以及后端反射镜构成V型谐振腔,通过腔内插入非线性晶体LBO,获得了高转... 详细信息

高功率高光束质量的蓝色激光在激光显示与照明、水下通信和成像、有色金属加工等许多领域具有广泛应用前景.本文利用增益芯片底部的高反镜分布布拉格反射镜、折叠镜以及后端反射镜构成V型谐振腔,通过腔内插入非线性晶体LBO,获得了高转换效率的高功率、高光束质量蓝光输出.实验研究了非线性晶体的长度、基频激光的线宽、倍频走离角的补偿等不同因素对外腔面发射激光器腔内倍频蓝光输出功率的影响.在LBO的Ⅰ类相位匹配条件下,当晶体长度为5 mm,所用双折射滤波片厚度为1 mm时,获得超过6 W的491 nm波长蓝光输出,x和y方向的光束质量M2因子均为1.08,倍频转换效率为63%.

关键词：腔内倍频外腔面发射蓝光激光器 Ⅰ类相位匹配走离角补偿

基于外腔面发射激光器腔内三倍频的可调谐紫外激光器

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物理学报 2024年第8期73卷 115-122页

作者：成佳伍亚东晏日彭雪芳朱仁江王涛蒋丽丹佟存柱宋晏蓉张鹏重庆师范大学物理与电子工程学院重庆401331 中国科学院长春光学精密机械与物理研究所长春130033 北京工业大学理学部北京100124 重庆师范大学重庆国家应用数学中心重庆401331

紫外激光器具有频率高、波长短、单光子能量大以及空间分辨率高等特点,在精细加工、生命科学、光谱学等许多方面应用前景广阔.本文报道了一种基于外腔面发射激光器腔内三倍频的可调谐紫外激光器.该激光器采用了W型谐振腔,并插入双折射... 详细信息

紫外激光器具有频率高、波长短、单光子能量大以及空间分辨率高等特点,在精细加工、生命科学、光谱学等许多方面应用前景广阔.本文报道了一种基于外腔面发射激光器腔内三倍频的可调谐紫外激光器.该激光器采用了W型谐振腔,并插入双折射滤波片作为偏振和波长调谐元件,通过Ⅰ类相位匹配的LBO晶体对980 nm基频光进行倍频产生490 nm蓝光,再通过Ⅰ类相位匹配的BBO晶体对9.80 nm基频光和490 nm倍频光进行和频获得327 nm紫外输出.当LBO和BBO晶体的长度都为5 mm时,在环境温度为15℃,泵浦功率为47 W的条件下,实验输出的327 nm紫外激光功率达到538 mW.选择厚度为2 mm的双折射滤波片作为调谐元件,可获得的紫外激光器输出波长的连续调谐范围为8.6 nm.该紫外激光器同时显示了良好的光束质量和较好的功率稳定性.

关键词：可调谐外腔面发射激光器非线性频率变换三倍频

基于490 nm垂直外腔面发射激光器的长距离水下激光通信系统

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物理学报 2024年第17期73卷 169-177页

作者：王涛王章行沈小雨朱仁江蒋丽丹陆寰宇路永乐宋晏蓉张鹏重庆师范大学物理与电子工程学院重庆401331 中国科学院长春光学精密机械与物理研究所长春130033 重庆邮电大学重庆400065 北京工业大学物理与光电工程学院北京100124 重庆师范大学重庆国家应用数学中心重庆401331

水下无线光通信技术为深海勘探和海洋资源开发利用带来了一种效率高且可靠性强的通信新方案.本文采用490 nm垂直外腔面发射激光器作为光源,基于声光外调制技术,采用脉冲位置调制方式(pulseposition modulation,PPM)搭建了长距离水下无... 详细信息

水下无线光通信技术为深海勘探和海洋资源开发利用带来了一种效率高且可靠性强的通信新方案.本文采用490 nm垂直外腔面发射激光器作为光源,基于声光外调制技术,采用脉冲位置调制方式(pulseposition modulation,PPM)搭建了长距离水下无线光通信系统.结合光源的优势并经过软判决算法优化PPM解调来提升水下通信性能,采用64 PPM调制,成功实现了96 m的水下传输距离,在50 MHz时隙频率下得到传输的误码率为1.9×10^(-5).同时测量到采用软判决解调相较于硬判决解调在性能增益上有着大约2 dB的提升,验证了软判决算法在提升水下通信性能方面相比硬判决算法的显著优势.

关键词：垂直外腔面发射激光器脉冲位置调制软判决算法水下无线光通信

Raising on Water Stocking Density Reduces Geese Reproductive Performances via Water Bacteria and lipopolysaccharide Contaminations in “Geese-Fish” Production System

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Agricultural Sciences in China 2011年第9期10卷 1459-1466页

作者： jiang dan-li liU li WANG Cong-li CHEN Fang SUN Ai-dong SHI Zhen-dan College of Animal Science South China Agricultural University Guangzhou 510642 P.R.China College of lnformatics South China Agricultural University Guangzhou 510642 P.R. China

This study was carried out to unravel the mechanism of reductions in production performances in high stocking density geese flocks during summer months in ＂geese-fish＂ production system. Experiment 1 observed the water bacterial growth, lipopolysaccharde concentrations in water and geese blood, and geese reproductive performances from summer to winter, in two flocks with varying on water stocking densities. Results showed that counts of total bacteria, Escherichia coli and Salmonella in water, as well as water and geese plasma LPS concentrations, exhibited a tendency decreasing from the highest levels in summer, to intermediate levels in autumn, and to the lowest values in winter. Such seasonal decreases in bacteria and LPS concentrations were associated with similar seasonal decreases in embryo mortality during incubation. In addition, embryos dead or showing development retardation by day 25 of incubation contained copious LPS in allantoic fluid, in contrast to the negligible amount in normal developing embryos. Raising on water stocking density elevated bacteria counts, LPS concentrations in water and geese plasma, and decreased egg fertility but increased embryo mortality during incubation. In experiment 2, exogenous LPS treatment to the geese depressed egg laying, reduced egg hatchability, caused sickness behavior in the goslings hatched. In experiment 3, exogenous LPS directly administered to day 8 and 18 embryos during incubation dose dependently increased mortality and decreased hatchability, and caused sickness behavior in the goslings hatched. It is concluded that the raising on water geese stocking density stimulates pathogenic bacteria growth in water, which via LPS contamination impaires embryo development in incubation and therefore reduces geese reproductive performance and gosling quality during the hot summer months.

关键词： water bacteria growth lipopolysaccharide production performances geese

Improving Geese Production Performance in “Goose-Fish” Production System by Competitive Reduction of Pathogenic Bacteria in Pond Water

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Journal of Integrative Agriculture 2012年第6期11卷 993-1001页

作者： YANG Xi-wen liU li jiang dan-li WANG Cong-li SUN Ai-dong SHI Zhen-dan Department of Animal Science South China Agricultural University Guangzhou 510642 P.R.China Institute of Food Safety and Quality Jiangsu Academy of Agricultural Sciences Nanjing 210014 P.R.China Institute of Animal Science Jiangsu Academy of Agricultural Sciences Nanjing 210014 P.R.China

This study investigated whether competitive reduction of pathogenic bacteria growth in pond water alleviates lipopolysaccharide （LPS） contamination and improves geese production performances in the ＂goose-fish＂ production system, thereby providing the potential for an improved technique for ecological water fowl production. In the first experiment, 240 Magang goslings of 15-d age were randomly and equally allocated into 16 ＂yard and pond＂ pens using a 2-2 factorial design with 4 replications per treatment. In the 55-d experimental period, the goslings received 2 main treatments： supplementation of Bacillus subtilis spores in the feed and addition of photosynthetic bacteria （PSB） to the pond water. Both B. subtilis spores and PSB treatments significantly suppressed water counts of Gram-negative bacteria Escherichia coli, Salmonella and Shigella, and LPS concentrations in pond water and in gosling blood （P〈0.05）. As the result, the two treatments significantly improved gosling weight gain and carcass quality, marked by enhanced breast and leg muscle percentages and reduced subcutaneous fat proportions （P〈0.05）. Moreover, the improved effects of B. subtilis spores and PSB treatments were additive. In the second experiment, 1 160 adult geese were induced to start egg laying from May throughout the summer months. The geese were separated equally into control and experimental flocks to fit into 2 integration production units, with a density of 1 bird m-2 meter on pond water. Experimental flock geese were treated with B. subtilis spores in feed and PSB in the pond water for the duration of the study. Such treatment combination significantly depressed the growth of E. coli, Salmonella and Shigella in the pond water and reduced LPS concentrations both in pond water and in geese blood （P〈0.01）. As a result, egg fertility, fertile and set egg hatchabilities were all improved in the treated flock. Results from both growing goslings and breeding geese demonstrated that water bac

关键词： bacteria growth lipopolysaccharide geese production performance B. subtilis spores photosyntheticbacteria

Hippocampal CA1 pyramidal cells and neurotrophic factors in a rat model of vascular dementia following Xiongma drop pill versus Ginkgo leaf tablets

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Neural Regeneration Research 2009年第12期4卷 973-978页

作者： Ying Zhao lin liu Houjun Teng Jiling jiang dan li College of Pharmacy Harbin University of Commerce Harbin 150076 Heilongjiang Province China

BACKGROUND： Previous studies have demonstrated the neuroprotective effects of Xiongma drop pill （XMDP） in a mouse model of vascular dementia. Neurotrophic factors play an important role in repair and regeneration of injured neurons. OBJECTIVE： To compare the effects of XMDP and Ginkgo leaf tablets on the appearance and number of hippocampal CA1 pyramidal neurons, as well as neurotrophic factor content in brain tissues, during vascular dementia formation to explore the neuroprotective mechanisms of XMDP. DESIGN, TIME AND SETTING： A randomized, controlled, animal experiment was performed at the Laboratory of Pharmacology, College of Pharmacy, Harbin University of Commerce between April 2007 and December 2008. MATERIALS： XMDP was prepared by the College of Pharmacy, Harbin University of Commerce, with each 40 mg pill containing ferulic acid （≥ 0.149 mg） and gastrodin （≥ 0.171 mg）. Ginkgo leaf tablets were purchased from Taiyuan Qianyuan Pharmacy, China. METHODS： Healthy, adult, male, Wistar rats were randomly assigned to 6 groups： sham-operation, model, XMDP （high-, middle-, and low- dose）, and Ginkgo leaf tablets. The 6 groups were subdivided into two subgroups according to administration days, i.e., 30 and 60 days, with 8 animals in each subgroup. Rats in the model, XMDP, and Ginkgo leaf tablets groups were subjected to permanent bilateral ligation of the common carotid artery to establish a vascular dementia model. At 8 days after model establishment, all groups received intragastric administration once daily of the following： 10 mL/kg normal saline in the sham-operation and model groups; 0.4, 0.2, and 0.1 g/kg XMDP in the high-, middle-, and low-dose XMDP groups, respectively; and 50 mg/kg Ginkgo leaf tablets in the Ginkgo leaf tablets group. MAIN OUTCOME MEASURES： Hematoxylin-eosin staining was used to observe appearance and to quantify the number of hippocampal CA1 pyramidal neurons. Brain-derived neurotrophic factor and nerve growth factor concentrations in brai

关键词： Xiongma drop pill vascular dementia pyramidal neurons brain-derived neurotrophic factor nerve growth factor

Interface catalytic reduction of alumina by nickle for the aluminum nanowire growth: Dynamics observed by in situ TEM

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Nano Research 2024年第3期17卷 1225-1231页

作者： Zichun Wang dan Wang Ang li lizhuo Wang Xiaodong Han Yijiao jiang Jianfeng Chen Jun Huang Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Organic–Inorganic CompositesBeijing University of Chemical TechnologyBeijing 100029China Laboratory for Catalysis Engineering School of Chemical and Biomolecular EngineeringThe University of SydneyNew South Wales 2006Australia Beijing Key Laboratory of Microstructure and Property of Advanced Materials Beijing University of TechnologyBeijing 100024China Department of Engineering Macquarie UniversitySydneyNew South Wales 2109Australia

Metal nanowires show promise in a broad range of applications and can be fabricated via a number of methods,such as vapor–liquid–solid process and template-based ***,the synthesis of Al nanowires(NWs)is still challenging from the stable alumina *** this work,the Ni-catalyzed fabrication of Al NWs has been realized using various Al_(2)O_(3) *** growth dynamics of Al NWs on Ni/Al_(2)O_(3) was studied using in situ transmission electron microscopy(TEM).The effect of alumina structures,compositions,and growth temperature were *** growth of Al NWs correlates with the Na addition to the alumina *** no eutectic mixture of nickel aluminide was formed,a mechanism of Ni-catalyzed reduction of Al_(2)O_(3) for Al NWs growth has been proposed instead of the vapor–liquid–solid *** key insights reported here are not restricted to Ni-catalyzed Al NWs growth but can be extended to understanding the dynamic change and catalytic performance of Ni/Al_(2)O_(3) under working conditions.

关键词： in situ transmission electron microscopy(TEM) Al nanowires alumina reduction nanowire growth

Assembly of peptide nanostructures with controllable sizes

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Nano Research 2024年第1期17卷 151-161页

作者： dan Cheng Fan Jia Yun-Bao jiang Vincent P.Conticello Tao jiang The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China Department of Chemistry Emory UniversityAtlanta 30033USA

Controlled peptide assembly offers significant promise to develop synthetic supramolecular nanostructures to display material and biological properties that mimic protein assemblies in *** the progress in forming peptide nanostructures of various morphology,there exists a distinct gap between natural and synthetic assembly systems in terms of size *** nanostructures with a narrow size distribution that can be tuned over a wide range of length-scales is essential for applications that require precise spacing between *** approach provides the opportunity to correlate materials and biological properties of interest with assembly *** this review,we discuss representative endeavors over the past two decades for design of size-controllable peptide nanostructures using tunable building *** mechanisms for size control,e.g.,molecular frustration,template-directed peptide assembly,and multi-component peptide co-assembly,will also be *** also demonstrate the applicable scopes of these strategies and suggest potential future avenues for scientific advances in this field.

关键词： peptide assembly controllable size template multi-component