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国家自然科学基金(50125258)

作品数:7 被引量:24H指数:3
相关作者:陈丹平达宁周秦岭杨旅云彭明营更多>>
相关机构:中国科学院上海光学精密机械研究所日本产业技术综合研究所更多>>
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钕离子掺杂和钕铝共掺高硅氧玻璃的光谱性质研究被引量:5
2007年
基于多孔玻璃烧结的方法制备了钕离子掺杂和钕铝共掺高硅氧玻璃,测量了掺钕高硅氧玻璃的吸收光谱、荧光光谱和荧光寿命.利用Judd-Ofelt理论计算得到了钕离子在高硅氧玻璃中的强度参数,计算并对比了掺钕高硅氧玻璃和钕铝共掺高硅氧玻璃的理论荧光寿命、受激发射截面和发光量子效率.讨论了钕铝共掺高硅氧玻璃中铝离子的掺入对玻璃发光性质的影响.通过与其他掺钕氧化物玻璃和一些商用硅酸盐玻璃的主要光谱性质的比较,掺钕高硅氧玻璃显示了较好的光谱性质,有可能成为一种应用于高能和高频激光领域的新型激光材料.
乔延波达宁陈丹平邱建荣
关键词:光谱性质JUDD-OFELT理论
空芯光子晶体光纤的研究进展被引量:2
2006年
综述了空芯光子晶体光纤(HC-PCF)的原理、制作方法和最新应用进展。详细介绍了HC-PCF在粒子传输、受激拉曼散射、激光频标、单模中红外光波导和高能超短激光脉冲领域的应用,讨论了HC-PCF的发展前景。
乔延波达宁杨旅云彭明营周秦岭邱建荣陈丹平
关键词:空芯光子晶体光纤光子带隙受激拉曼散射
Investigations on Valence-Change Behaviors of Europium Ions in Eu-Doped Aluminate and Silicate Phosphors被引量:5
2006年
Compounds of Sr3Al2O6 : Eu, SrgAl14O25 : Eu, and BaZnSiO4 : Eu were synthesized by high-temperature solid state reactions. The doping Eu^3 + ions were partially reduced to Eu^2+ in Sr4Al14O25:Eu and BaZnSiOg:Eu prepared in an oxidizing atmosphere, N^2 + O2. However, such an abnormal reduction process could not be performed in Sr3Al2O6:Eu, which was also prepared in an atmosphere of N^2 + O2. Moreover, even though Sr3A1EO6:Eu was synthesized in a reducing condition CO, only part of the Eu^3 + ions was reduced to Eu^2 + . The existence of trivalent and divalent europium ions was confirmed by photoluminescent spectra. The different valence-change behaviors of europium ions in the hosts were attributed to the difference in host crystal structures. The higher the crystal structure stiffness, the easier the reduction process from Eu^3 + to Eu^2 + .
彭明营达宁乔延波吴伯涛汪晨陈丹平邱建荣
Upconversion Luminescence of Ce^(3+) Doped BK7 Glass by Femtosecond Laser Irradiation被引量:3
2006年
Near-infrared to visible upconversion luminescence was observed in a multicomponent silicate (BK7) glass containing Ce^3 + ions under focused infrared femtosecond laser irradiation. The emission spectra show that the upconversion luminescence comes from the 4f-5d transition of the Ce^3 + ions. The relationship between the intensity of the Ce^3 + emission and the pump power reveals that a three-photon absorption predominates in the conversion process from the near-infrared into the blue luminescence. The analysis of the upconversion mechanism suggests that the upconversion luminescence may come from a three-photon simultaneous absorption that leads to a population of the 5d level in which the characteristic luminescence occurs.
汪晨彭明营杨旅云胡晓达宁陈丹平朱从善邱建荣
关键词:UPCONVERSION
High Quantum Efficiency and High Concentration Erbium-Doped Silica Glasses Fabricated by Sintering Nanoporous Glasses被引量:2
2006年
A new method was used to prepare erbium-doped high silica (SiO2 % 〉 96 % ) glasses by sintering nanoporous glasses. The concentration of erbium ions in high silica glasses can be considerably more than that in silica glasses prepared by using conventional methods. The fluorescence of 1532 nm has an FWHM (Full Wave at Half Maximum) of 50 nm, wider than 35 nm of EDSFA (erbium-doped silica fiber amplifer), and hence the glass possesses potential application in broadband fiber amplifiers. The Judd-Ofelt theoretical analysis reflects that the quantum efficiency of this erbium-doped glass is about 0.78, although the erbium concentration in this glass (6 × 10^3) is about twenty times higher than that in silica glass. These excellent characteristics of Er-doped high silica glass will be conducive to its usage in optical amplifiers and microchip lasers.
达宁乔延波杨旅云彭明营汪晨周秦岭赵崇军邱建荣朱从善陈丹平赤井智子
关键词:FWHM
Spectroscopic Properties of Nd^(3+)-Doped High Silica Glass Prepared by Sintering Porous Glass
2006年
A new kind of Nd^3+-doped high silica glass (SiO2 〉 96% (mass fraction)) was obtained by sintering porous glass impregnated with Nd^3 + ions. The absorption and luminescence properties of high silica glass doped with different Nd^3 + concentrations were studied. The intensity parameters Ωt (t = 2, 4, 6), spontaneous emission probability, fluorescence lifetime, radiative quantum efficiency, fluorescence branching ratio, and stimulated emission cross section were calculated using the Judd-Ofelt theory. The optimal Nd^3+ concentration in high silica glass was 0.27% (mole fraction) because of its high quantum efficiency and emission intensity. By comparing the spectroscopic parameters with other Nd^3 +- doped oxide glasses and commercial silicate glasses, the Nd^3 + -doped high silica glasses are likely to be a promising material used for high power and high repetition rate lasers.
乔延波达宁彭明营杨旅云陈丹平邱建荣朱丛善赤井智子
掺铒高硅氧玻璃光谱性质的研究被引量:7
2006年
应用Judd-Oflet理论计算了新型掺铒高硅氧玻璃中铒离子的强度参量Ωt(t=2,4,6),Ω2=8·15×10-20,Ω4=1·43×10-20,Ω6=1·22×10-20,相比于其他氧化物玻璃,表现出较大的Ω2,6值,反映了铒离子周围的近邻结构不对称性和Er-O键的离子键成分较高.利用McCumber理论计算得到了能级4I13/2→4I15/2跃迁的受激发射截面为σc=0·51pm2.这种高硅氧玻璃掺铒离子浓度尽管高于石英光纤的掺杂浓度10倍左右,其荧光寿命和量子效率仍达到6·0ms和66·0%,有可能成为新的光学放大和微片激光材料.
达宁杨旅云彭明营孟宪庚周秦岭陈丹平赤井智子角野广平
关键词:JUDD-OFELT理论量子效率
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