Harry Cook, Yulia Bezsudnova, Lari M Koponen, Ole Jensen, Giovanni Barontini and Anna U Kowalczyk
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引用次数: 0
摘要
我们实现了一种基于非线性磁光旋转的本征光学泵浦磁梯度仪。我们的研究表明,我们的传感器能达到 18 fT 的梯度灵敏度,并能拒绝高达 30 dB 衰减的共模同质磁场噪声。我们证明,我们的磁场梯度仪具有足够的灵敏度和弹性,可用于生物磁性应用。特别是,我们能够记录人脑的听觉诱发反应,并在存在外部磁场干扰的情况下进行实时磁心动图检查。我们的梯度仪在人体生物磁感应方面提供了与光泵磁强计互补的能力,并为人体生物磁探测开辟了新的途径。
An optically pumped magnetic gradiometer for the detection of human biomagnetism
We realise an intrinsic optically pumped magnetic gradiometer based on non-linear magneto-optical rotation. We show that our sensor can reach a gradiometric sensitivity of 18 fT and can reject common mode homogeneous magnetic field noise with up to 30 dB attenuation. We demonstrate that our magnetic field gradiometer is sufficiently sensitive and resilient to be employed in biomagnetic applications. In particular, we are able to record the auditory evoked response of the human brain, and to perform real-time magnetocardiography in the presence of external magnetic field disturbances. Our gradiometer provides complementary capabilities in human biomagnetic sensing to optically pumped magnetometers, and opens new avenues in the detection of human biomagnetism.
期刊介绍:
Driven by advances in technology and experimental capability, the last decade has seen the emergence of quantum technology: a new praxis for controlling the quantum world. It is now possible to engineer complex, multi-component systems that merge the once distinct fields of quantum optics and condensed matter physics.
Quantum Science and Technology is a new multidisciplinary, electronic-only journal, devoted to publishing research of the highest quality and impact covering theoretical and experimental advances in the fundamental science and application of all quantum-enabled technologies.