基于升压匹配技术的射频铷灯发光研究  

Technology Research of Rubidium Lamp Based on Technique

作　　者：辛弄潮 蒙艳松[1] 王韦玮 张荣彦[1] 杜丽军 XIN Nongchao;MENG Yansong;WANG weiwei;ZHANG Rongyan;DU Lijun(China Academy of Space Technology (Xi’an ),Xi’an 710000,China)

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《空间电子技术》2019年第2期15-19,共5页Space Electronic Technology

基　　金：陕西省重点研发计划项目(2017ZDXM-GY-113)

摘　　要：充有一定比例的铷原子和缓冲气体的射频无极灯可用于星载铷钟的量子态制备和态检测。因此,射频铷灯中不同成分物质的光谱特性将会直接影响量子态的泵浦效率。在实验室条件下,利用实验仪器搭建,可以自由改变射频激励功率和铷灯工作温度的谱灯发光实验平台,并首次利用升压匹配技术实现不同射频激励频率下的射频功率匹配。利用该实验平台可以便捷地研究灯泡工作温度、射频激励功率、射频激励频率等参数对铷灯发光强度的影响。实验表明,随着射频灯泡工作温度的上升,铷原子的780nm和795nm谱线强度先上升后下降,而780nm和795nm谱线强度之比I_(780)/I_(795)先下降后上升。因此,稀有气体发光强度在窄温度区间内快速下降。射频功率对于射频铷灯内不同成分发光谱线强度的影响与温度类似,而射频激励频率对铷原子和稀有气体发光强度的影响并不明显。Rubidium electrodeless lamp is used to accomplish quantum state preparation and detection of space-born rubidium clock.Thus,luminous intensity of various components in rubidium lamp has great influence on the pumping efficiency of quantum states.Under laboratory conditions,experimental instruments are used to build a luminescence experiment platform of rubidium lamp,which is able to freely change lamp operating temperature and RF excitation power.Besides that,boost matching technique is employed to achieve power-matching under various RF excitation frequency.By using the platform,influence of excitation power,frequency and operating temperature on rubidium lamp can be studied conveniently.According to the experimental results,with the rise of the operating temperature,780nm and 795nm light intensity related to rubidium atom fells rapidly,followed by distinct recovery after 160℃.However,the ratio of 780nm light intensity to 795nm light intensity is inversely proportional to the trend of light intensity related to rubidium atom.There is a noticeable decline of light intensity related to noble gas during narrow temperature region.The effects of RF excitation power on luminous intensity of various components in rubidium lamp is similar to that of lamp operating temperature.The variation of RF frequency has little impact on light intensity of rubidium lamp. The experimental platform is able to study the mechanism and influencing factors of RF excited atomic (ion) luminescence process.

关 键 词：星载铷钟 发光强度 升压匹配 离子无极灯 

分 类 号：O433.4[机械工程—光学工程]