Cr^3＋，Yb^3＋，Er^3＋共掺磷酸盐铒玻璃转镜调Q激光性质研究

研究了Cr^3＋，Yb^3＋，Er^3＋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．

Preparation and optical properties of Ag/PPy composite colloids

Ag/PPy (polypyrrole) composite colloids were prepared through the reaction of silver nitrate with pyrrole solution in DNIF either in the dark, or under the irradiation of femtosecond laser (fs) pulse or UV lamp. The UV-vis spectra of the nanocomposite colloid display an intense absorption band around 620 nm, accompanied by a weak one around 470 nm. The colors and optical absorption spectra of as-synthesized colloids can be reversibly tuned between blue and red, corresponding to absorption band of 620 urn and 526 urn, within few seconds by adding base and acid solutions or gases in turn into the composite colloid suspension. In addition, excess of H+ solution enhanced the absorption band around 470 nm and, at the same time, depressed that around 620 nm. The possible mechanism for the formation and optical absorption properties of the Ag/PPy composite colloid was proposed. (C) 2006 Elsevier B.V. All rights reserved.

脉冲氙灯用新型复合石英玻璃管性能的研究

为了研制出满足大功率脉冲氙灯技术要求的管壁材料，使用石英玻璃管二步法制备工艺，采用分层制砣技术，把纯石英玻璃和掺铈石英玻璃密切熔合，研制出新型的复合石英玻璃管。研制了几种不同复合比例的复合石英玻璃管，并对其光谱性能和机械性能进行了测试。通过对比实验表明，当纯石英玻璃层和掺铈石英玻璃层的比例合适时，复合石英玻璃管不仅具有吸收小于320nm波长的紫外辐射的性能，而且具有比掺铈石英玻璃管更高的机械强度和抗冲击性能，满足了大功率脉冲氙灯对管壁材料的特定要求。采用复合石英玻璃管制备的大功率脉冲氙灯具有优良的抗冲击性

微晶玻璃在大功率脉冲氙灯封接中的应用

：为提高大功率脉冲氙灯的封接强度，将微晶玻璃作为封接材料引入到氙灯封接应用中. 以 Bi2O3,ZnO,Al2O3,MgO,CaCO3,SiO2,BaO,H3BO3,P2O5,Na2O 为原料，通过高温熔融制备了大功率脉冲氙灯封接 用微晶玻璃样品. 测试了样品的热膨胀系数,并通过差热分析(Differential Thermal Analysis，DTA)对脉冲氙灯 微晶玻璃的封接温度进行了讨论，用X 射线衍射(X-ray diffraction ，XRD)表征了封接玻璃，并进行了分析. 将 制得的样品磨成玻璃粉末，制成膏剂状玻璃焊料，对大功率脉冲氙灯进行封接，得到大功率脉冲氙灯的微晶 玻璃封接件. 通过氦质谱检漏仪检测，1#、2#、4#封接件气密性良好，达到10-6 Pa.