The integrated absorption cross section Σ abs, peak emis sion cross section σ emi, Judd-Ofeld intensity parameters Ω t(t=2,4,6), and spontaneous emission probability A R of Er 3+ ions were determined fo r...The integrated absorption cross section Σ abs, peak emis sion cross section σ emi, Judd-Ofeld intensity parameters Ω t(t=2,4,6), and spontaneous emission probability A R of Er 3+ ions were determined fo r Erbium doped alkali and alkaline earth phosphate glasses. It is found the comp ositional dependence of σ emi is almost similar to that of Σ abs, wh ich is determined by the sum of Ω t (3Ω 2+10Ω 4+21Ω 6). In addition, the compositional dependence of Ω t was studied in these glass systems. As a resu lt, compared with Ω 4 and Ω 6, the Ω 2 has a stronger compositional depend ence on the ionic radius and content of modifiers. The covalency of Er-O bonds in phosphate glass is weaker than that in silicate glass, germanate glass, alumi nate glass, and tellurate glass, since Ω 6 of phosphate glass is relatively la rge. A R is affected by the covalency of the Er 3+ ion sites and correspon ds to the Ω 6 value.展开更多
Physical, and spectral properties of a new com-mercial ytterbium doped phosphate laser glass with big size, NEW/Yb, was researched. Assessing from thermal mechani-cal property, nonlinear property, crystalline phase, m...Physical, and spectral properties of a new com-mercial ytterbium doped phosphate laser glass with big size, NEW/Yb, was researched. Assessing from thermal mechani-cal property, nonlinear property, crystalline phase, micro defects and spectroscopic properties of NEW/Yb and Kigre’s QX/Yb glasses, it is found that thermal-optical properties and glass internal quality of NEW/Yb glass are superior to QX/Yb glass. For NEW/Yb, the emission cross-section and fluorescent lifetime have a value of 0.53×10 pm2 and 2.2 ms, which are higher than those of QX/Yb.展开更多
A new Er^3＋/Yb^3＋ co-doped phosphate glass has been prepared, which exhibits good chemical durability and spectral properties. Planar graded index waveguides have been fabricated in the glass by Ag^＋-Na^＋ ion exch...A new Er^3＋/Yb^3＋ co-doped phosphate glass has been prepared, which exhibits good chemical durability and spectral properties. Planar graded index waveguides have been fabricated in the glass by Ag^＋-Na^＋ ion exchange in a mixed melt of silver nitrate and potassium nitrate,Ion exchange is carried out by varying the process parameters such as temperature, diffusion time, and molten salt compositions. The diffusion parameters, diffusion coefficients, and activation energy are determined by the guidelines of fabricated wavegnides, which are determined by tile input prism coupling technique.展开更多
采用离子交换法制备铒镱共掺磷酸盐波导光放大器,实验研究交换熔盐中的Ag离子浓度和交换时间对波导折射率和深度的影响.首先通过微电子的一些基本工艺制备8μm,10μm以及12μm宽度的Al条形掩模,并根据不同的AgNO_3浓度以及不同的交换时...采用离子交换法制备铒镱共掺磷酸盐波导光放大器,实验研究交换熔盐中的Ag离子浓度和交换时间对波导折射率和深度的影响.首先通过微电子的一些基本工艺制备8μm,10μm以及12μm宽度的Al条形掩模,并根据不同的AgNO_3浓度以及不同的交换时间得到不同的波导深度样品.然后在光学位移平台上对制备的条形波导进行测试,其中10μm宽,6μm深的条形波导的信号光输出功率为9μW,信号光净增益达3.0 d B/cm.展开更多
基金Funded by the Natural Science Foundation of Guangdong Prov ince(013013) and the Science and Technology Plan of Guangdong Province(2002B11604)
文摘The integrated absorption cross section Σ abs, peak emis sion cross section σ emi, Judd-Ofeld intensity parameters Ω t(t=2,4,6), and spontaneous emission probability A R of Er 3+ ions were determined fo r Erbium doped alkali and alkaline earth phosphate glasses. It is found the comp ositional dependence of σ emi is almost similar to that of Σ abs, wh ich is determined by the sum of Ω t (3Ω 2+10Ω 4+21Ω 6). In addition, the compositional dependence of Ω t was studied in these glass systems. As a resu lt, compared with Ω 4 and Ω 6, the Ω 2 has a stronger compositional depend ence on the ionic radius and content of modifiers. The covalency of Er-O bonds in phosphate glass is weaker than that in silicate glass, germanate glass, alumi nate glass, and tellurate glass, since Ω 6 of phosphate glass is relatively la rge. A R is affected by the covalency of the Er 3+ ion sites and correspon ds to the Ω 6 value.
基金This work was supported by the National Natural Science Foundation of China (Grant No. 69988006) the National Program of "863" High-Tech Plan.
文摘Physical, and spectral properties of a new com-mercial ytterbium doped phosphate laser glass with big size, NEW/Yb, was researched. Assessing from thermal mechani-cal property, nonlinear property, crystalline phase, micro defects and spectroscopic properties of NEW/Yb and Kigre’s QX/Yb glasses, it is found that thermal-optical properties and glass internal quality of NEW/Yb glass are superior to QX/Yb glass. For NEW/Yb, the emission cross-section and fluorescent lifetime have a value of 0.53×10 pm2 and 2.2 ms, which are higher than those of QX/Yb.
基金the Optical Science and Technology Program of Shanghai (No. 00261002)
文摘A new Er^3＋/Yb^3＋ co-doped phosphate glass has been prepared, which exhibits good chemical durability and spectral properties. Planar graded index waveguides have been fabricated in the glass by Ag^＋-Na^＋ ion exchange in a mixed melt of silver nitrate and potassium nitrate,Ion exchange is carried out by varying the process parameters such as temperature, diffusion time, and molten salt compositions. The diffusion parameters, diffusion coefficients, and activation energy are determined by the guidelines of fabricated wavegnides, which are determined by tile input prism coupling technique.
文摘采用离子交换法制备铒镱共掺磷酸盐波导光放大器,实验研究交换熔盐中的Ag离子浓度和交换时间对波导折射率和深度的影响.首先通过微电子的一些基本工艺制备8μm,10μm以及12μm宽度的Al条形掩模,并根据不同的AgNO_3浓度以及不同的交换时间得到不同的波导深度样品.然后在光学位移平台上对制备的条形波导进行测试,其中10μm宽,6μm深的条形波导的信号光输出功率为9μW,信号光净增益达3.0 d B/cm.
