Rubidium-beam microwave clock pumped by distributed feedback diode lasers

• 来源期刊: 中国物理B（英文版）
• 关键词: quantum frequency standard atomic clock atomic beam distributed feedback
• 年，卷（期）: 2017,（11）
• 页码范围: 151-154
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/1674-1056/26/11/113201

摘要

A rubidium-beam microwave clock,optically pumped by a distributed feedback diode laser,is experimentally investigated.The clock is composed of a physical package,optical systems,and electric servo loops.The physical package realizes the microwave interrogation of a rubidium-atomic beam.The optical systems,equipped with two 780-nm distributed feedback laser diodes,yield light for pumping and detecting.The servo loops control the frequency of a local oscillator with respect to the microwave spectrum.With the experimental systems,the microwave spectrum,which has an amplitude of 4 nA and a line width of 700 Hz,is obtained.Preliminary tests show that the clock short-term frequency stability is 7 × 10-11 at 1 s,and 3 × 10-12 at 1000 s.These experimental results demonstrate the feasibility of the scheme for a manufactured clock.