基于移动光晶格布洛赫振荡的原子干涉重力仪  

Compact atomic interference gravimeter based on Bloch oscillations of moving optical lattice

作　　者：彭鹏 董翔宇 殷国玲 毛德凯 熊炜 周小计 PENG Peng;DONG Xiangyu;YIN Guoling;MAO Dekai;XIONG Wei;ZHOU Xiaoji(Department of Electronics,Peking University,Beijing 100871,China)

机构地区：[1]北京大学电子学院,北京100871

出　　处：《计测技术》2023年第4期119-127,共9页Metrology & Measurement Technology

基　　金：国家重大科研仪器研制项目(61727819)。

摘　　要：针对目前传统的原子干涉重力仪—马赫-曾德尔型原子重力仪存在体积较大,影响设备便携性的问题,北京大学实现了国内首个基于移动光晶格的布洛赫振荡原理的小型化原子干涉重力仪。本实验系统的采样率达到0.9 Hz,能够满足长期实时测量的需求,且实验系统中原子的竖直位移约为3 cm,灵敏度达到4.6×10^(2)μGal·Hz^(-1/2),在2800 s积分时间内,分辨率可以达到6.5(0.7)μGal。实验成果为原子干涉重力仪的小型化与实用化指明了未来的发展方向。The traditional atomic interference gravimeter,MachZender type atomic gravimeter,has the problem of large volume,which affects the portability of the equipment.Peking University realizes the first compact atomic interference gravimeter based on the Bloch oscillation principle of moving optical lattice in China which is different from the conventional MachZehnder atomic gravimeter.The sampling rate of the experimental system reaches 0.9 Hz,which can meet the needs of longterm realtime measurement,and the vertical displacement of atoms in the experimental system is about 3 cm.The sensitivity measured by the system reaches 4.6×10^(2)μGal·Hz^(-1/2).The resolution can reach 6.5(0.7)μGal in 2800 s integration time.The experimental results point the future development direction for miniaturization and application of atomic interference gravimeter.

关 键 词：原子干涉重力仪 拉姆塞-伯德原子干涉仪 布洛赫振荡 移动光晶格 

分 类 号：TB939[一般工业技术—计量学]