抽运-检测型非线性磁光旋转铷原子磁力仪的研究
发布时间：2018-08-31 08:29
【摘要】：报道了一种抽运-检测型的非线性磁光旋转铷原子磁力仪.其原理是线偏振光通过处于外磁场环境中被极化的原子介质后,由于原子对线偏振光中左、右圆偏成分不同的吸收和色散,导致光的偏振方向会产生与磁场相关的转动.分析了该磁力仪的工作原理,并测试了它对不同磁场大小的响应.测试结果表明,磁力仪测量范围为100—100000 nT,极限灵敏度为0.2 p T/Hz~(1/2),磁场分辨率为0.1 p T.进一步研究了不同磁场下原子系综极化态的横向弛豫时间,讨论了原子磁力仪高磁场采样率的获得方法.本文的原子磁力仪在5000—100000 n T的磁场测量范围内磁场采样率可实现1—1000 Hz范围内可调,能够测量低频的微弱交变磁场.本文的研究内容为大磁场测量范围、高灵敏度、高磁场采样率的原子磁力仪研制提供了重要参考.
[Abstract]:A pump-detection nonlinear magneto-optic rotating rubidium atomic magnetometer is reported.The principle is that the polarized light passes through an atomic medium polarized in an external magnetic field and the polarized light is rotated in a magnetic field due to the different absorption and dispersion of the atoms to the left and right circular polarization components of the linearly polarized light. The measuring results show that the magnetometer has a measuring range of 100-100000 nT, a limiting sensitivity of 0.2 P T/Hz~ (1/2) and a magnetic field resolution of 0.1 P T. The transverse relaxation time of the atomic ensemble polarization state in different magnetic fields is further studied, and the height of the atomic magnetometer is discussed. The magnetic field sampling rate of the atomic magnetometer can be adjusted in the range of 1-1000 Hz in the magnetic field measurement range of 5000-100000 n T. It can measure the weak alternating magnetic field of low frequency. Important reference.
【作者单位】： 兰州空间技术物理研究所真空技术与物理重点实验室;
【分类号】：O562
本文编号：2214448
[Abstract]:A pump-detection nonlinear magneto-optic rotating rubidium atomic magnetometer is reported.The principle is that the polarized light passes through an atomic medium polarized in an external magnetic field and the polarized light is rotated in a magnetic field due to the different absorption and dispersion of the atoms to the left and right circular polarization components of the linearly polarized light. The measuring results show that the magnetometer has a measuring range of 100-100000 nT, a limiting sensitivity of 0.2 P T/Hz~ (1/2) and a magnetic field resolution of 0.1 P T. The transverse relaxation time of the atomic ensemble polarization state in different magnetic fields is further studied, and the height of the atomic magnetometer is discussed. The magnetic field sampling rate of the atomic magnetometer can be adjusted in the range of 1-1000 Hz in the magnetic field measurement range of 5000-100000 n T. It can measure the weak alternating magnetic field of low frequency. Important reference.
【作者单位】： 兰州空间技术物理研究所真空技术与物理重点实验室;
【分类号】：O562
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