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Single-lobed Near Diffraction-limited Beam from 1W Laser Diode Array with an External Cavity

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Chinese journal of Lasers 2001年第6期10卷 2-6页

作者： hONG Zhi ChEN jun (State Key Laboratory of Modern Optical Instrumentation, Zhejiang University,hangzhou 310027, China) A.hermerschmidt F.Wang h.j.eichler (Optical Institute, Technical University of Berlin, 10623 Berlin, Germany) 浙江大学现代光学仪器国家重点实验室浙江杭州 310027 德国柏林工业大学光学所德国柏林 10623

An external cavity for the laser diode array with a conventional mirror in what we call two-time self-injection operation is presented. The external cavity consists of two lenses, a flat external mirror(EM) in the image plane of the array and a prism that is used as an output coupler. The single-lobed near diffraction-limited far field beam of a 1 W 10-stripe gain-guided LD array lies at 6.4°～9° with the external cavity operation in two-time self-injection mode, whereas at 2.5°～3.0° for its normal feedback operation. The width of the far field beam (FWhM) is 0.43° and 0.63° at driving current of 2 and 3.2 ×I thr , respectively, much narrower than that in normal feedback operation, but at the expense of lower output power. The output of the system is very stable and insensitive to the tilt and position of the EM.

关键词： external cavity spatial coherence laser diode array

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紫外铜离子激光器的理论研究

激光技术 1998年第4期22卷 239-245页

作者：余建华李景镇丘军林Ｈ．Ｊ．Ｅｉｃｈｌｅｒ深圳大学光电子工程系华中理工大学激光技术国家重点实验室 Technical University Berlin Germany

系统研究了连续工作的紫外铜离子激光器理论，即空心阴极放电的阴极位降理论，阴极溅射，放电等离子体中粒子的扩散和粒子数密度的速率方程。计算结果由实验得到验证。

关键词：金属蒸气激光空心阴极放电紫外相干辐射

Spider odors induce stoichiometric changes in fruit fly Drosophila melanogaster

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Current Zoology 2021年第1期67卷 127-129页

作者： Ronalds KRAMS Tatjana KRAMA Maris MUNKEVICS Sarah eichler David M.BUTLER Linda DOBKEVICA Priit jOERS jorge CONTRERAS-GARDUNO janina DAUKSTE Indrikis A.KRAMS Plant health Estonian University of Life SciencesTartu 51006Estonia Department of Biotechnology Daugavpils UniversityDaugavpils 5401Latvia Institute of Ecology and Earth Sciences University of TartuTartu 51010Estonia Department of Zoology and Animal Ecology Faculty of BiologyUniversity of LatviaRiga 1004Latvia Department of Biological Sciences Kent State UniversityOhioSalem 4460USA Department of Plant Sciences University of TennesseeKnoxville 37996-4561USA Department of Environmental Science Faculty of Geography and Earth SciencesUniversity of LatviaRiga 1004Latvia Department of General and Microbial Biochemistry University of TartuTartu 51010Estonia Escuela Nacional de Estudios Superiores Unidad Morelia Universidad Nacional Autonoma de MexicoMorelia 58190Mexico Institute of Food Safety Animal Health and Environment BIORRiga 1076Latvia Department of Psychology University of TennesseeKnoxville 37996-4561USA

Animal senses and signals are amazingly diverse,and the major modalities by which animals acquire sensory input from their environments are sound,light,vibration,and chemical *** mainly rely on visual,nociceptive,and olfactory cues to discriminate between rewards and *** has been shown that the visual and olfactory cues of predators substantially affect the adult phenotype in Drosophila melanogaster(Krams et al.2016),a prominent animal model for biological research.

关键词： melanogaster cues Drosophila

Synthesis, characterization, and stability of iron (III) complex ions possessing phenanthroline-based ligands

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Open journal of Inorganic Chemistry 2013年第1期3卷 7-13页

作者： Shawnt Tosonian Charles j. Ruiz Andrew Rios Elma Frias jack F. eichler Department of Chemistry University of California Riverside Riverside USA

It has previously been demonstrated that phenanthroline-based ligands used to make gold metallotherapuetics have the ability to exhibit cytotoxicity when not coordinated to the metal center. In an effort to help assess the mechanism by which these ligands may cause tumor cell death, iron binding and removal experiments have been considered. The close linkage between cell proliferation and intracellular iron concentrations suggest that iron deprivation strategies may be a mechanism involved in inhibiting tumor cell growth. With the creation of iron (III) phen complexes, the iron binding abilities of three polypyridal ligands [1,10-phenanthroline (phen), 2,9-dimethyl-1, 10-phenanthroline (methylphen), and 2,9-di-sec-butyl-1, 10-phenanthroline (sec-butylphen)] can be tested via a competition reaction with a known iron chelator. Therefore, iron (III) complexes possessing all three ligands were synthesized. Initial mass spectrometric and infrared absorption data indicate that iron (III) tetrachloride complex ions with protonated phen ligands (Rphenh+) were formed: [phenh][FeCl4], [methylphenh][FeCl4], [sec-butylphenh][FeCl4]. UV-vis spectroscopy was used to monitor the stability of the complex ions, and it was found that the sec-butylpheniron complex was more stable than the phen and methylphen analogues. This was based on the observation that free ligand was observed immediately upon the addition of EDTA to the [phenh][FeCl4] and [methylphenh] [FeCl4] complex ions.

关键词： Polypyridyl Ligands Phenanthroline Iron (III) Complex Ions

Cr^(4+):YAG被动调Q激光器中受激粒子上转换效应对脉冲的影响研究

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物理学报 2003年第10期52卷 2471-2475页

作者：杨林黄维玲丘军林冯宝华张治国 Volker Gaebler Baining Liu hans j.eichler 华中科技大学激光技术国家重点实验室武汉 430074中国科学院物理研究所物理光学实验室北京 100080 华中科技大学激光技术国家重点实验室武汉 430074 中国科学院物理研究所物理光学实验室北京 100080 Optical Institute Technical University BerlinD-10623 BerlinGermany

分析和报道了受激粒子能量上转换 (ETU)效应对Cr:YAG被动调QNd :YAG Nd :YVO4激光器的输出脉冲影响研究 .结合ETU理论分析和被动调Q速率方程组 ,得到了初始反转粒子密度 ,末态反转粒子密度和光强最大时反转粒子密度的比值变化对激光输... 详细信息

分析和报道了受激粒子能量上转换 (ETU)效应对Cr:YAG被动调QNd :YAG Nd :YVO4激光器的输出脉冲影响研究 .结合ETU理论分析和被动调Q速率方程组 ,得到了初始反转粒子密度 ,末态反转粒子密度和光强最大时反转粒子密度的比值变化对激光输出脉冲宽度和脉冲能量的影响 ,和实验结果相一致 .同时讨论了降低ETU效应的方法。

关键词：被动调Q激光器受激粒子能量上转换效应 Cr^4+:YAG激光器优化设计输出脉冲固体激光器饱和吸收体

激光二极管端面泵浦的多晶Nd:YAG1.32μm连续激光器

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量子电子学报 2003年第3期20卷 301-303页

作者：杨林黄维玲丘军林 Volker Gaebler Liu Baining hans j.eichler 华中科技大学激光技术国家重点实验室武汉430074 Optical Institute Technical University BerlinD-10623 BerlinGermany

本文报道了激光二极管端面泵浦的多晶Nd:YAG(polycrystalline Nd:YAG ceramic)1.32μm连续激光器的实验研究。在泵浦功率为2.1W时,激光达到阈值开始输出;在泵浦功率为9W时,输出功率达到690mW,斜率效率为11%。据我们所知,这是目前报道的... 详细信息

本文报道了激光二极管端面泵浦的多晶Nd:YAG(polycrystalline Nd:YAG ceramic)1.32μm连续激光器的实验研究。在泵浦功率为2.1W时,激光达到阈值开始输出;在泵浦功率为9W时,输出功率达到690mW,斜率效率为11%。据我们所知,这是目前报道的功率最大的多晶Nd:YAG 1.32μm连续激光器。

关键词：激光二极管泵浦 Nd:YAG激光器单晶Nd:YAG 多晶Nd:YAG

用标准具和光栅反馈实现半导体激光器波长锁定

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激光与光电子学进展 2001年第9期38卷 17-18页

作者：洪治张明陈军 A.hermerschmidt F.WANG h.j.eichler 浙江大学德国柏林工业大学光学研究所

提出利用标准具和光栅光学反馈的方法,实现了对一个7W LD的波长注入锁定.首先利用标准具光学反馈对一个7W LD进行了注入锁定实验.实验中使用一个0.14 mm厚的标准具,其自由光谱范围Δν=714 Ghz,条纹精细度F＝14.14.由于半导体激光器自... 详细信息

提出利用标准具和光栅光学反馈的方法,实现了对一个7W LD的波长注入锁定.首先利用标准具光学反馈对一个7W LD进行了注入锁定实验.实验中使用一个0.14 mm厚的标准具,其自由光谱范围Δν=714 Ghz,条纹精细度F＝14.14.由于半导体激光器自由振荡时光谱很宽(达2.4 nm)及标准具厚度的限制,该半导体激光器经标准具反馈注入后被锁定在两个纵模上,波长分别为796.47 nm和798.0 nm,纵模间隔为1.53 nm,与标准具参数一致.但实验中未能获得单纵模运行.在此基础上,又提出了标准具加光栅光学反馈注入的方法.实验中选用1800 线/mm的光栅.当LD驱动电流为3.0 A(自由振荡输出功率为1.39 W)时,获得了单纵模输出.但实验中未能观测到该LD输出远场分布的明显改变.(OC13)

关键词：标准具光栅反馈半导体激光器波长

Volkswagen公司采用模块化标准部件的新型3缸柴油机

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汽车与新动力 2015年第2期47卷 24-27页

作者： F.eichler j.Kahrstedt E.Pott h.Beddies 李媛媛

Volkswagen公司凭借新型3缸柴油机创造了在小型汽车细分市场的通用基础。通过削减发动机系列,以及集成模块化的柴油机标准部件,与以往的多发动机策略相比,显著降低了费用和成本。研发重点是降低CO2排放,并使配备新发动机的Polo车型满足... 详细信息

Volkswagen公司凭借新型3缸柴油机创造了在小型汽车细分市场的通用基础。通过削减发动机系列,以及集成模块化的柴油机标准部件,与以往的多发动机策略相比,显著降低了费用和成本。研发重点是降低CO2排放,并使配备新发动机的Polo车型满足欧6排放法规的要求。

关键词：柴油机模块化标准部件 CO2排放燃油耗

Beam Profile Improvement of a LD Array by an External Cavity with Photorefractive Phase Conjugate Mirror

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Chinese journal of Lasers 2000年第4期 10-15页

作者： hONG Zhi ChEN jun (State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, hangzhou 310027, China)h. j. eichler, A. hermerschmidt, P. Pogany, M. Kammerer (Optical Institute, Technical University of Berlin, Germany)

A technique for improvement of the beam profile of a LD array by an external cavity with self pumped photorefractive phase conjugate mirror is presented. A spatially filtered part of the far field from the negative lobe of a gain guided LD array is directly coupled to a phase conjugating rhodium doped barium titanate crystal. The positive lobe power increases remarkably at low drive current. Beam energy increases significantly at emission angle centered close to 2.3°at different drive current. A large fraction of power in the positive lobe is contained in a Gaussian spike of width 1.34× diffraction limit (FWhM of the far field is 0.75°).

关键词： external cavity photorefractive phase conjugator laser diode array (LD array) Rh∶BaTiO 3 crystal