排序方式: 共有19条查询结果,搜索用时 240 毫秒
1.
The effects of Al_2O_3, Yb_2O_3, Er_2O_3 and OH~- on spectral properties of P_2O_5.Na_2O.SrO.Al_2O_3.Yb_2O_3.Er_2O_3 erbium phosphate glass were studied. 5, 8, and 13 mol% Al_2O_3, 4, 5, 6, 7 and 8 mol% Yb_2O_3 and0.05, 0.2, and 0.4 mol% Er_2O_3 were used. It was found that Al_2O_3 can improve fluorescent lifetime ofEr~(3+)ions, but the integrated absorption cross section of Er~(3+)ions decreases with the increase of Al_2O_3concentration. Evaluating from energy transfer efficiency of Yb~(3+)to Er~(3+)and spectral parameters ofYb~(3+)and Er~(3+),we conclude that 6 mol% Yb_2O_3 and 0.4 mol% Er_2O_3 are needed for LD pumped 相似文献
2.
Er~(3+)-doped fluoride lanthanum aluminosilicate glasses with compositions of (65-x/2)SiO_2·(25-x/2)Al_2O_3·xAlF_3·9.1La_2O_3·0.6Er_2O_3·0.3Yb_2O_3(x=4, 8, 12, 20, 30) (mol%) were prepared and their glass transition temperatures and spectroscopic properties were investigated.The Ω_2, Ω_4, and Ω_6 intensity parameters of glasses were calculated by Judd-Ofelt theory from absorption curves. It was found that glasses transition temperature and melting temperature decreased with the increase of fluoride content in glass,Ω_2 decreased gradually with the increase of AlF_3 content,but both Ω_4 and Ω_6 did not increase until AlF_3 content increased to 30 mol%.The quantum efficiency of ~4I_(13/2) to ~4I_(15/2) transition of Er~(3+) ions increases with the increase of AlF_3 content in glass.Fluorescent lifetime is longer in glass containing more AlF_3 content. 相似文献
3.
研究了Cr3+,Yb3+,Er3+共掺磷酸盐铒玻 璃转镜调Q激光性质.三种Er2O3掺杂浓度的激光实验结果表明,在Er2O3名义掺杂浓 度为0.5wt%时,玻璃的综合激 光性质最好,重复频率为0.1Hz时,它的激光阈值功率为14.5mJ,最大输出能量为9.6mJ ,斜率效率为0.55%.在同种实验条件下,比较了Cr14和Kigre公司生产的QE-7S激光性质参数,实验表明,前者激光阈值功率稍低,而后者的斜率效率和最大输出功率略高.
关键词:
3+-Yb3+-Er3+共掺')" href="#">Cr3+-Yb3+-Er3+共掺
磷酸 盐玻璃
光谱性质
激光性质 相似文献
4.
研究了含Er3+离子浓度较高(155×1020cm-3)的磷酸盐玻璃中Yb3+敏化离子浓度和Al2O3含量对Er3+离子光谱性质的影响.根据掺Er3+磷酸盐玻璃的吸收光谱,利用JuddOfelt理论计算了强度参数Ωt(t=2,4,6)、Er3+离子的4I132→4I152能级跃迁振子强度、自发辐射几率等光谱参数.用McCumber理论计算了Er3+离子的受激发射截面,结果表明Yb3+离子浓度不影响Er3+离子的受激发射截面,但会影响Er3+离子荧光强度,Yb3+含量越高,Er3+的荧光越强.对掺Er3+磷酸盐玻璃的荧光上转换光谱测试表明,Yb3+含量越高,上转换荧光越强,玻璃上转换主要表现为双光子吸收机理研究了含Er3+离子浓度较高(155×1020cm-3)的磷酸盐玻璃中Yb3+敏化离子浓度和Al2O3含量对Er3+离子光谱性质的影响.根据掺Er3+磷酸盐玻璃的吸收光谱,利用JuddOfelt理论计算了强度参数Ωt(t=2,4,6)、Er3+离子的4I132→4I152能级跃迁振子强度、自发辐射几率等光谱参数.用McCumber理论计算了Er3+离子的受激发射截面,结果表明Yb3+离子浓度不影响Er3+离子的受激发射截面,但会影响Er3+离子荧光强度,Yb3+含量越高,Er3+的荧光越强.对掺Er3+磷酸盐玻璃的荧光上转换光谱测试表明,Yb3+含量越高,上转换荧光越强,玻璃上转换主要表现为双光子吸收机理
关键词:
Er3+离子
磷酸盐玻璃
光谱性质
JuddOfelt参数 相似文献
5.
OH-对磷酸盐铒玻璃光谱性质的影响 总被引:11,自引:0,他引:11
本文系统研究了Yb3+、Er3+共掺磷酸盐铒玻璃中OH-含量与铒玻璃荧光寿命和光谱性质的关系.结果表明OH-基团的存在使得Er3+离子的荧光强度显著降低,荧光寿命大大缩短.比较了三种不同Al2O3含量(5mol%,8mol%和13mol%)的铒玻璃在2.9μm波长处的红外吸收系数与铒离子荧光寿命的关系,发现玻璃中OH-在2.9μm的吸收系数和Er3+的4Ⅰ13/2能级离子衰减速率成线性关系,不同Al2O3含量的玻璃具有不同Er3+和OH-基团的相互作用参量和不同的荧光寿命值及量子效率.并从玻璃结构上解释了Al2O3含量对除水机制和光谱性质的影响.经过充分除水后的铒玻璃荧光寿命可达到9.1ms. 相似文献
6.
使用预先烧结好的多晶原料,在一定比例的N2和CO2混合气氛下,采用提拉法生长出了高质量的铽镓石榴石(TGG)单晶.采用XRD、ICP和热力学计算进行分析,结果表明,晶体生长过程中的挥发机制为Tb3Ga5O12的分解,分解产物为Tb3 GaO6,Ga2O和O2.CO2被Ga2O还原产生O2,抑制了Tb3Ga5O12的分解.TGG单晶的化学分子式存在Tb富集或Ga缺失,为Tb3Ga4.4~4.5O11.1~11.3非化学计量比相.将晶体毛坯加工成φ2.8 mm×10.7 mm的晶棒,消光比测试结果表明镀增透膜后消光比平均可提高18.8 dB. 相似文献
7.
8.
Er3+-doped fluoride lanthanum aluminosilicate glasses with compositions of (65- x/2)SiO2 · (25 -and their glass transition temperatures and spectroscopic properties were investigated. The Ω2, Ω4, and Ω6 intensity parameters of glasses were calculated by Judd-Ofelt theory from absorption curves. It was found that glasses transition temperature and melting temperature decreased with the increase of fluoride content in glass, Ω2 decreased gradually with the increase of AlF3 content, but both Ω4 and Ω6 did not increase until AlF3 content increased to 30 mol%. The quantum efficiency of 4I13/2 to 4I15/2 transition of Er3+ ions increases with the increase of AlF3 content in glass. Fluorescent lifetime is longer in glass containing more AlFa content. 相似文献
9.
玻璃中稀土掺杂的离子的光谱性质受其周围的玻璃结构和在玻璃基质中的分布影响很大。利用熔融法制备了组分为9S iO2.26A l2O3.65CaO.1.0Er2O3.0.3Yb2O3和分别加入MgO以及La2O3的掺铒钙铝硅玻璃,并研究了其吸收边和光学带隙。计算得出离子填充比随玻璃的平均摩尔质量的增大而减小,同时利用Judd-O felt模型计算出该玻璃体系的Ω2,Ω4和Ω6参数,并进行了分析。随着MgO或La2O3的加入,吸收边向短波长移动,光学带隙增大,同时Ω2和Ω6值也增大。对ln(α)和ω的曲线进行线性拟合可以计算Urbach能量,其值与光学带隙的变化趋势一致。 相似文献
10.
研究了Er3+/Yb3+共掺、Tm3+/Yb3+共掺、Er3+/Yb3+/Tm3+共掺碲酸盐玻璃在970nm抽运下的荧光光谱和上转换光谱性质,测试了Er3+离子的4I11/2和4I13/2能级荧光寿命变化情况.结果发现Er3+/Yb3+/Tm3+共掺碲酸盐玻璃的常规荧光谱线在1450—1700nm区域明显加宽,并在1630nm有一荧光峰,可能是Tm3+:1G4→3F2跃迁产生.上转换发光研究表明,由于碲酸盐玻璃声子能量低的缘故,三种共掺系统下都存在上转换发光现象.在Er3+/Yb3+/Tm3+共掺中,上转
关键词:
Er3+/Yb3+/ Tm3+共掺
碲酸盐玻璃
荧光
上转换光谱 相似文献