Effect of cell temperature on the bias magnetic sensitivity of an atomic spin co-magnetometer

Wenfeng Fan; Lihong Duan; Jiong Huang; Weijia Zhang; Wei Quan

doi:10.1117/12.2575681

5 November 2020 Effect of cell temperature on the bias magnetic sensitivity of an atomic spin co-magnetometer

Wenfeng Fan, Lihong Duan, Jiong Huang, Weijia Zhang, Wei Quan

Proceedings Volume 11564, AOPC 2020: Optoelectronics and Nanophotonics; and Quantum Information Technology; 115640J (2020) https://doi.org/10.1117/12.2575681
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

The atomic spin co-magnetometer operating in the spin-exchange relaxation-free regime is a promising rotation sensor for its ultrahigh sensitivity to inertial forces. However, it was found that the bias magnetic sensitivity (BMS) of the comagnetometer was much larger than theoretically expected, making magnetic noise a dominant error. This paper reports on the experimental results of the effect of cell temperature on the BMS. It is found that the BMS increases rapidly as the cell temperature rises. This is attributed to the polarization gradient of atomic spins induced by the absorption of the pump beam by the atoms. The experiments and theory reveal that a high-power laser source for pumping is essential for the suppression of BMS and the improvement of bandwidth in the co-magnetometer.

Citation Download Citation

Wenfeng Fan, Lihong Duan, Jiong Huang, Weijia Zhang, and Wei Quan "Effect of cell temperature on the bias magnetic sensitivity of an atomic spin co-magnetometer", Proc. SPIE 11564, AOPC 2020: Optoelectronics and Nanophotonics; and Quantum Information Technology, 115640J (5 November 2020); https://doi.org/10.1117/12.2575681

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KEYWORDS

Magnetism

Polarization

Gyroscopes

Neon

Noble gases

Spin polarization

Alkali metals

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