Dick Effect in a Microwave Frequency Standard Based on Laser-Cooled 113Cd+ Ions  

作　　者：张建伟 缪凯 王力军 

机构地区：[1]Department of Precision Instrument,Tsinghua University [2]Joint Institute for Measurement Science,Tsinghua University [3]Department of Physics,Tsinghua University

出　　处：《Chinese Physics Letters》2015年第1期27-29,共3页中国物理快报（英文版）

基　　金：Supported by the Young Scientists Fund of the National Natural Science Foundation of China under Grant No 11304177;the National Basic Research Program of China under Grant No 2010CB922901

摘　　要：The Dick effect is one of the main limits to the frequency stability of a passive frequency standard, especially for the fountain clock and ion dock operated in pulsed mode which require unavoidable dead time during interrogation. Here we measure the phase noise of the interrogation oscillator applied in the microwave frequency standard based on laser-cooled 113^Cd＋ ions, and analyze the Allan deviation limited by the Dick effect. The results indicate that the Dick effect is one of the key issues for the cadmium ion dock to reach expected frequency stability. This problem can be resolved by interrogating the local oscillator continuously with two ion traps.The Dick effect is one of the main limits to the frequency stability of a passive frequency standard, especially for the fountain clock and ion dock operated in pulsed mode which require unavoidable dead time during interrogation. Here we measure the phase noise of the interrogation oscillator applied in the microwave frequency standard based on laser-cooled 113^Cd＋ ions, and analyze the Allan deviation limited by the Dick effect. The results indicate that the Dick effect is one of the key issues for the cadmium ion dock to reach expected frequency stability. This problem can be resolved by interrogating the local oscillator continuously with two ion traps.

关 键 词：Dick Effect in a Microwave Frequency Standard Based on Laser-Cooled 

分 类 号：TM935.115[电气工程—电力电子与电力传动] TN752[电子电信—电路与系统]