Characterization of noise sources in a microfabricated single-beam zero-field optically-pumped magnetometer

被引：57

作者：

Krzyzewski, S. P. ^{[1
]}

Perry, A. R. ^{[1
]}

Gerginov, V. ^{[1
]}

Knappe, S. ^{[1
]}

机构：

[1] Univ Colorado, Boulder, CO 80309 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2019年 / 126卷 / 04期

基金：

美国国家卫生研究院;

关键词：

ATOMIC MAGNETOMETRY; LIGHT SHIFTS; MAGNETOENCEPHALOGRAPHY; RESONANCE; LINES; ARRAY;

D O I：

10.1063/1.5098088

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present an experimental noise characterization of a miniature single-beam absorption-based optically-pumped magnetometer with a noise floor of 7fT/Hz(1/2) operating in the spin-exchange relaxation-free regime. We experimentally evaluate noise arising from the laser intensity, laser frequency, laser polarization, cell temperature, and magnetic field coils used for the phase-sensitive detection of the magnetometer signal. We find that noise in the range between DC and 30Hz is a result of noise sources coupling to the atoms in a manner similar to a magnetic field, while the noise at frequencies above 30Hz is mainly due to laser intensity noise. Our results place an upper limit on the noise sources for our system that matches well with the noise spectrum of the magnetometer at frequencies above 5Hz.

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页数：7

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