小型喷泉铷钟的初步实验
文献类型：学位论文
| 作者 | 魏荣 |
| 学位类别 | 硕士 |
| 答辩日期 | 2000 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 王育竹 |
| 关键词 | 量子频标 原子喷泉 空心光束 光纤耦合 激光冷却原子 |
| 其他题名 | Preliminary Experiments of Compact Fountain-style Rb Atomic Clock |
| 中文摘要 | 该文主要介绍了一种新的冷原子频标的方案,及在实验上获得的一些结果.该文的综述部分介绍了量子频标状况和激光冷却原子的发展.现有是时间标准是由量子频标提供的,它在国防、高科技的许多领域扮演非常重要的角度.我们国家迫切需要准确度、稳定度优于10<'-12>的量子频标,将冷原子技术应用于量子频标正可以解决这个问题,发达国家竞相发展冷原子频标,已经将其准确度做到优于10<'-16>.该文的第二部分为理论部分,介绍了我们的小型铷原子频标方案、其具体参数及我们的目标——准确度和稳定度达10<'-14>.我们的原子喷泉让冷原子一次通过谐振腔,探测普通的吸收信号,其线宽为3Hz,为了提高信噪比,我们增加一束空心光束,它带来的问题是导致谱线频移,但可以通过精确计算修正.该文第三部分讲了具体的实验框架和实验进程.该实验中使用了大量仪器,包括激光器、各种光学元件、真空系统、大量电路、计算机控制等.在MOT中俘获长度为14mm-20mm,直径为1-5mm-2.5mm的冷原子团,其原子数目为1.1×10<'7>,平均密度为7.9×10<'8>/cm<'3>,最大密度为7.31×10<'9>/cm<'3>,温度约为400μK.该文的后两部分除了总结前面的理论和实验,还分析了现在存在的问题,并展望了下一步的工作.文章最后介绍了作者硕士期间的其它工作:理论计算加入大型变角度衰减片对"神光Ⅱ"主放大器光路的影响. |
| 英文摘要 | The paper illuminates a new idea of cold atoms frequency standard, and some results are obtained in experiment. In overview part, the paper introduces quantum frequency standard, and the development of laser-cooling-atoms. Modern time standard is supplied by atomic clocks, which play a very important part in many fields, such as national defence system and high-tech. Our country urgently requires atomic clock with an accuracy and stabilization super-to 10"12. And the problem will be solved when laser-cooling-atoms is used to atomic clock. In recent years, some developed countries are developing the technique, whose accuracy has been beyond 10~(-16). Second part of the paper is theory analysis, which introduces our compact-type Rb atomic clock, the data and the expection object: the accuracy and stabilization reach to 10~(-14). In our atomic fountain, cold atoms pass cavity only once, normal absorption signalis dected, whose line width is 3Hz. In order to improve signal-to-noise ratio, a hollow beam is used. Hollow beam will create frequency shift, which can be amended when the shift is computed. Specific experiment structure and experiment process is exploded in the third. Many apparatuses, including lasers, optical units, vacuum system, circuits, computer-controlling, et. al, are applied in the experiment. Cold atoms with a 14-20mm length, 1.5-2.5mm diameter is obtained in MOT, the number is 1.1 * 10~7, average density is 7.9 * 10~8/cm~3, maximum density is 7.31 * 10~9/cm~3, and the temperature is about 400 μK. In the last two parts, besides generalizing former theory and experiment, problems is analysed, and next works is previewed. At last, another work, done by the author during studying for master degree, is introduced: Deduce the effect of angular variable mirror by theory when it is added into the light path of "SHENGUANG II" master amplifier. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/16593]  |
| 专题 | 上海光学精密机械研究所_学位论文 |
| 推荐引用方式 GB/T 7714 | 魏荣. 小型喷泉铷钟的初步实验[D]. 中国科学院上海光学精密机械研究所. 2000. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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