Realization of an All-Fibre Self-Organization Intra-Cavity Coherent Erbium-Doped Fibre Laser

An intra-cavity coherent coupling Michelson Er-doped fibre （EDF） laser （MCEDFL） is proposed and demonstrated. Characteristics of the MCEDFL are investigated. It is found that the MCEDFL with a polarizer can be coherent combined effectively. By the experiment based on fibre Bragg gratings （FBGs） with different reflectivity, we find that the reflectivity of the FBG play a vital role in improving the performance of the MCEDFL. This outcome adequately shows many favourable features, such as high efficiency, easy operation, and simple all-fibre configuration.     

重金属钋化物分子MPo（^2Ⅱ），（M=Cu，Ag，Au）的结构和势能函数

利用相对论小核赝势研究了重金属钋化物分子MPo（X^2Ⅱ），（M=Cu，Ag，Au）．用群论方法结合原子分子反应静力学原理导出了分子的基电子状态和相应的离解极限，并在各种电子相关理论水平上计算了它们的平衡几何和振动频率．在此基础上用Murrell—Sorbie函数形式拟和势能曲线，得到了总的解析势能函数，并计算出了光谱数据和力常数．     

欢迎有敬业精神的同志自荐为本刊编委

本刊编委产生的方式有三种：自荐、推荐和聘请，自荐是本刊提倡的方式。凡不计报酬、乐意献身于科技期刊出版事业、基本具有副高级以上技术职称的同志,都可以自荐为本刊编委。自荐者可与本刊联络处联系，地址：北京市81信箱66分箱 刘建林，邮政编码：100095。 《光谱实验室》编辑部     

掺Eu3+离子Y2SiO5晶体格位选择光谱研究

分别利用白光灯、４５７－９ ｎｍ 氩离子激光、二倍频ＹＡＧ∶Ｎｄ 激光泵浦的诺丹明６Ｇ 可调谐窄线宽（０－５ ｃｍ －１） 染料激光作为光源， 以单色仪锁相放大器光电倍增管计算机数据采集系统记录光谱， 测量并研究了Ｙ２ＳｉＯ５∶Ｅｕ３ ＋ 晶体的透射光谱、荧光光谱、激发光谱和格位选择荧光光谱。５Ｄ０ →７Ｆ０，１ ，２ ，３，４ 跃迁，３０ 多根谱线（总数为５０ 根） 被观察到。在该晶体中Ｅｕ３＋ 替换Ｙ３＋ 离子， 占据两个较低对称性的光学格位， 这两个格位的５Ｄ０ ７Ｆ０ 能级跃迁谱线相隔大约只有０－２ ｎｍ ， 在室温下有一定的光谱关联。并用Ｘ射线谱对晶体的晶格常数ａ ， ｂ，ｃ 和晶面角度β进行测量， 测量结果显示掺杂后的晶格常数和未掺杂的Ｙ２ＳｉＯ５ 晶格常数基本一致。     

对苯醌二亚胺与吡啶共聚物的金属配合物催化法合成及性能

在二氯-1,3-双(二苯基磷)丙烷基镍(Ⅱ)存在下,通过N,N′-二氯苯醌二亚胺和2,5-二甲基-N,N′-二氯苯醌二亚胺与2,5-二溴吡啶的格氏(Grignard)试剂共聚,得到了两种新型共轭聚合物。采用FT-IR1、H-NMR、UV-Vis、XRD、循环伏安、充放电对共聚物进行结构与性能测试。结果表明:该类共聚物具有一定的电化学活性,每种聚合物均在-1.0~2.0 V出现一对氧化-还原峰。聚(N,N′-二氯苯醌二亚胺-吡啶)和聚(2,5-二甲基-N,N′-二氯苯醌二亚胺-吡啶)的比电容分别为126 F/g和63 F/g。     

第二种椭圆方程构造变系数非线性发展方程的无穷序列新精确解

本文为了获得非线性发展方程的无穷序列新精确解,进一步研究获得了第二种椭圆方程的几类新型解和Bäcklund变换.在此基础上,借助符号计算系统Mathematica,用带强迫项变系数组合KdV方程、(2+1)维和(3+1)维变系数Zakharov-Kuznetsov 方程为应用实例,构造了无穷序列新精确解.这里包括无穷序列Jacobi 椭圆函数光滑孤立子解、无穷序列Jacobi椭圆函数紧孤立子解、无穷序列三角函数紧孤立子解和无穷序列尖峰孤立子解. 关键词： 第二种椭圆方程 Bä cklund 变换 变系数非线性发展方程 无穷序列新精确解     

PREPARATION AND ELECTROCHEMICAL CHARACTERISTICS OF POLYMER ELECTROLYTE MEMBRANES BASED ON SAN/PVDF-HFP BLENDS

A copolymer of poly(acrylonitrile-co-styrene) (SAN) was synthesized via an emulsion polymerization method. Novel polymer electrolyte membranes cast from the blends of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), SAN and fumed silica (SiO2) are microporous and can be used in polymer lithium-ion batteries. The membrane shows excellent characteristics such as high ionic conductivity and good mechanical strength when the mass ratio between SAN and PVDF-HFP and SiO2 is 3.5/31.5/5. The ionic conductivity of the membrane soaked in a liquid electrolyte of 1 mol/L LiPF6/EC/DMC/DEC is 4.9×10-3 S cm-1 at 25℃. The membrane is electrochemical stable up to 5.5 V versus Li /Li in the liquid electrolyte. The influences of SiO2 content on the porosity and mechanical strength of the membranes were studied. Polymer lithium-ion batteries based on the membranes were assembled and their performances were also studied.     

Study on Synthesis of Multivalent Neoglycoproteins and Their Binding Properties to Hepatic Stellate Cells

Ncoglycoproteins of human serum albumin (HSA) modified with some kind of carbohydrates were synthesized. Their molecular weight and purification were determined by HPSEC and SDS-PAGE, respectively. The binding properties of these conjugates to hepatic steHate cells (HSCs) were evaluated by confocai fluorescence microscopy. The bioactivity revealed that compound 4a (HSA modified with glucose) showed high bindiug affinity.     

2,1,3-苯并硒二唑与联苯二胺类共轭共聚物的金属催化法合成与表征

利用金属催化法分别合成出了2,1,3-苯并硒二唑与N,N′-二氯联苯醌二亚胺、3,3′-二甲基-N,N′-二氯联苯醌二亚胺,3,3′-二甲氧基-N,N′-二氯联苯醌二亚胺的共轭交替共聚物:聚(N,N′-联苯醌二亚胺-2,1,3-苯并硒二唑),聚(3,3′-二甲基-N,N′-联苯醌二亚胺-2,1,3-苯并硒二唑),聚(3,3′-二甲氧基-N,N′-联苯醌二亚胺-2,1,3-苯并硒二唑)。利用凝胶色谱(GPC)、红外光谱、紫外可见光谱以及循环伏安(CV)等对这三种共聚物进行了表征和性能研究。紫外可见光谱分析结果表明,这三种共聚物分别在305nm、421nm,325nm、438nm和330nm、558nm处出现吸收峰,但由于受侧基的影响,聚(3,3′-二甲氧基-N,N′-联苯醌二亚胺-2,1,3-苯并硒二唑)相对于聚(N,N′-联苯醌二亚胺-2,1,3-苯并硒二唑)和聚(3,3′-二甲基-N,N′-联苯醌二亚胺-2,1,3-苯并硒二唑)的共轭程度要高,而且共聚物链上的侧基对其电化学性能也有一定的影响。