离子光频标中激光溅射与激光稳频技术的研究

发布时间：2018-07-06 14:48

本文选题：离子囚禁 + 激光溅射　；参考：《中国科学院大学(中国科学院武汉物理与数学研究所)》2017年硕士论文

【摘要】：近年来,随着导航、通信、互联网等领域对高精度原钟的需求越来越急切。铝离子量子逻辑光钟是光频标的研究热点之一。我们实验室选择钙离子协同冷却的铝离子作为光频标的参考物理体系,开展了一系列离子光频标的关键技术研究工作。本文总结了我硕士期间的工作,主要内容分为如下几个方面:1.搭建了一套使用激光溅射技术产生离子的实验装置。使用这一套系统实现了钙离子稳定的载入、冷却及探测。在优化激光溅射实验装置的溅射激光能量、射频功率等参数后,单次制备钙离子的时间由使用原子炉时10-20分钟缩短到小于10秒。2.研制了用于窄线宽激光器系统的双向温度控制F-P参考腔装置。并使用飞秒光梳测量了参考腔的零膨胀系数温度点,在该温度点处的控温精度达到±5 mK/天。在通过PDH稳频技术锁定后,其平均线性频率漂移在100 mHz/s以内。该装置已成功用于钙离子的边带冷却实验。
[Abstract]:In recent years, with the navigation, communication, Internet and other areas of high-precision clock demand more and more urgent. Aluminum quantum logic clock is one of the hotspots in the research of optical frequency standard. The aluminum ion cocooled by calcium ion was selected as the reference physical system of optical frequency standard in our laboratory, and a series of key technology research work of ion optical frequency standard was carried out. This article summarizes my master's work, the main content is divided into the following aspects: 1. An experimental device for ion generation using laser sputtering technology was built. This system is used to realize stable loading, cooling and detection of calcium ions. After optimizing the parameters of laser energy and RF power of laser sputtering experimental device, the time of single preparation of calcium ion was shortened from 10-20 minutes in atomic furnace to less than 10 seconds. 2. A bidirectional temperature control F-P reference cavity for narrow linewidth laser system is developed. The zero expansion coefficient temperature point of the reference cavity is measured by femtosecond light comb. The temperature control accuracy at this temperature point is 卤5mK / day. The average linear frequency drift is less than 100 MHz / s after locking by PDH technique. The device has been successfully used in the side band cooling experiment of calcium ion.
【学位授予单位】：中国科学院大学(中国科学院武汉物理与数学研究所)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN24

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