Free-Induction-Decay Magnetometer Based on a Microfabricated Cs Vapor Cell

被引：42
|
作者：
Hunter, D. [1 ]
Piccolomo, S. [1 ]
Pritchard, J. D. [1 ]
Brockie, N. L. [2 ]
Dyer, T. E. [2 ]
Riis, E. [1 ]
机构：
[1] Univ Strathclyde, Dept Phys, Glasgow G4 0NG, Lanark, Scotland
[2] Texas Instruments Inc, Larkfield Ind Estate, Greenock PA16 0EQ, Scotland
来源：
PHYSICAL REVIEW APPLIED | 2018年 / 10卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
SPIN PRECESSION;
D O I：
10.1103/PhysRevApplied.10.014002
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We describe an optically pumped Cs magnetometer containing a 1.5-mm-thick microfabricated vapor cell with nitrogen buffer gas operating in a free-induction-decay configuration. This allows us to monitor the free Larmor precession of the spin-coherent Cs atoms by separating the pump and probe phases in the time domain. A single light pulse can sufficiently polarize the atomic sample; however, synchronous modulation of the light field actively drives the precession and maximizes the induced spin coherence. Both amplitude and frequency modulation have been implemented with noise floors of 3 and 16 pT/root Hz, respectively, within the Nyquist-limited bandwidth of 500 Hz.
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页数：10
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