单光束小型化全光原子磁强计的设计与热场分析

Design and thermal field analysis of a single beam miniaturized all-optical atomic magnetometer

无自旋交换弛豫(SERF)原子磁强计是一种超高灵敏度磁强计,其小型化的研究对磁强计应用至关重要。其中,光路布局是制约其尺寸与灵敏度的关键因素。设计了一种单光束小型化原子磁强计,该磁强计为圆柱体,底面圆直径为21.2 mm,高为40.5 mm,并对其进行了热仿真实验。实验表明,该设计结构合理,且易于进行多通道测量,在脑磁图、心磁图等生物磁场测量领域具有实际应用价值。

Spin-exchange relaxation free(SERF)atomic magnetometer is a kind of ultra-sensitive magnetometer,and its miniaturization is very important for the application of magnetometer.The layout of optical path is the key factor that restricts its size and sensitivity.In this paper,a single beam miniaturized atomic magnetometer is designed.The magnetometer is a cylinder with a diameter of 21.2 mm and a height of 40.5 mm.Thermal simulation experiments are carried out on the magnetometer.The experimental results show that the design is reasonable in structure and easy for multi-channel measurement,and has practical application value in the field of biological magnetic field measurement such as magnetoencephalography and magnetocardiogram.