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适用于亚10fs的共心衍射无像差展宽器 被引量:9
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作者 胡婉约 王二玉 +1 位作者 李文雪 丁良恩 《光学学报》 EI CAS CSCD 北大核心 2007年第1期181-186,共6页
在升级5TW/40fs钛宝石激光系统的过程中,伴随10fs种子源的使用,提出并研制了一种新型的共心衍射无像差展宽器和全能量压缩器。该展宽器的最大特点是通过平面镜反射使光束入射时所形成的衍射点与展宽后的还原点均在凹面镜的球心(即共心结... 在升级5TW/40fs钛宝石激光系统的过程中,伴随10fs种子源的使用,提出并研制了一种新型的共心衍射无像差展宽器和全能量压缩器。该展宽器的最大特点是通过平面镜反射使光束入射时所形成的衍射点与展宽后的还原点均在凹面镜的球心(即共心结构),凹面镜不存在其它同类方法中的成像问题,展宽函数中不涉及凹面镜的焦距和离轴量。该展宽器可将亚10fs的种子脉冲展宽到纳秒量级,且具有无像差、高带宽、结构紧凑、调整精度高等优点,适合100TW级超快激光系统中脉冲展宽。 展开更多
关键词 超快光学 啁啾脉冲放大(CPA) 展宽器 共心衍射 压缩器 色散补偿
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Study on Crystallization of Titanium Silicalite Zeolite (Ⅱ)
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作者 Lin Min Zhu Bin +1 位作者 Shu Xingtian Wang Xieqing (Research Institute of Petroleum Processing, Beijing 100083) 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2009年第1期31-38,共8页
In order to investigate the rules on formation of zeolite during crystallization of titanium silicalite zeolite (TS-1) the X-ray diffractometry and Foulier transform infra-red spectrometry were applied to track the pr... In order to investigate the rules on formation of zeolite during crystallization of titanium silicalite zeolite (TS-1) the X-ray diffractometry and Foulier transform infra-red spectrometry were applied to track the process of crystallization of titanium silicalite zeolite. The research results revealed that at the initial stage of crystallization the interactions between silica gel and titania gel in the polymer blend could gradually lead to the formation of tiny crystal nuclei with complicated structure that could slowly grow up to form molecular sieves. Quite different from the conventional zeolites that use the acid sites as the catalytically active centers, the oxidative reactivity of the titanium silicalite zeolite was not proportional to its crystallinity and is associated with the oxidative centers of titanium contained in the zeolite. 展开更多
关键词 titanium silicalite zeolite TS- 1 hollow titanium silicalite HTS CRYSTALLIZATION CHARACTERIZATION
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