Optical-pumping small caesium clock based on modulation transfer spectrum frequency stabilizing laser

Abstract

The invention discloses an optical-pumping small caesium clock based on modulation transfer spectrum frequency stabilizing laser. Narrow-linewidth laser of modulation transfer spectrum frequency stabilization of high frequency stabilization degree serves as pumping laser and detection laser. A narrow linewidth laser, first to fifth half-wave plates, first to fifth polarization splitting prisms, aphase modulator, a caesium atom bubble with a magnetic shielding and heating thermal insulation material, a high-speed photoelectric detector, a laser phase demodulation and high speed servo control circuit, a laser driving power supply, an acousto-optic modulator, a atomic beam tube, a fluorescence detector, a microwave signal source, and a clock phase demodulation and servo control circuit are included. According to the provided high-performance optical pumping small caesium clock, the transition spectral line signal to noise ratio and frequency stabilization degree of the clock can be obviously enhanced, and influence of light frequency shift is reduced.

Description

technical field

[0001] The invention belongs to the technical field of microwave atomic clocks and microwave quantum frequency standards, in particular to an optically pumped small cesium clock microwave quantum frequency standard using modulation shift spectrum frequency stabilized high-performance narrow-linewidth lasers as pumping lasers and detection lasers and its Preparation. Background technique

[0002] As a primary frequency standard, miniaturized cesium atomic microwave clocks (small cesium clocks) have been widely used in the fields of punctuality and timing, positioning and navigation, time synchronization, and deep space exploration. It plays a pivotal role in the field of quantum frequency standard technology. Frequency stability is an important or even the most important index to measure the performance of atomic clocks, especially for application-oriented optically pumped small cesium clocks. The frequency stability of optically pumped small cesium clocks dep...

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