Rubidium-beam microwave clock pumped by distributed feedback diode lasers

• 作 者: 刘畅 周晟 王延辉 侯士敏
• 机 构: Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking Unive
• 出 处: Chinese Physics B
• 发表日期: 2017年11期
• 关键词: microwave clock pumped oscillator pumping servo optically detecting manufactured

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 n A 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.

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 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.