Liwei Jiang, Jinghong Xu, Junhao Liu, Chi Fang, Jun Zhu, Yuntian Zou, Yuanqiang Chen, Jiali Liu, Xin Zhao
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Signal enhancement in single-beam free-induction-decay magnetometers by manipulation of spin polarization.
The conventional single-beam free-induction-decay (FID) magnetometers based on an optical modulation scheme suffer from the reduction of signal in non-orthogonal magnetic field orientations, leading to worse magnetometer sensitivity. Here, we propose a scheme to enhance the signal in single-beam FID magnetometers by manipulation of spin polarization. The spin polarization built up by synchronous optical pumping is rotated to fully undergo free precession under the manipulation of the RF pulse field. We theoretically and experimentally validate the effectiveness of the proposed scheme, demonstrating that it achieves the enhancement of the FID signal in non-orthogonal magnetic field orientations and improves the magnetometer sensitivity. The scheme described in this work provides what we believe to be a new pathway to improve the magnetometer performance in various applications.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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