Four-channel optically pumped atomic magnetometer for magnetoencephalography
Four-channel optically pumped atomic magnetometer for magnetoencephalography
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DOI：
10.1364/oe.24.015403
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发表时间：
2016-07-11
期刊：
影响因子：
3.8
通讯作者：
Schwindt, Peter D. D.
中科院分区：
文献类型：
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作者：
Colombo, Anthony P.;Carter, Tony R.;Schwindt, Peter D. D.
我们研制了一种用于脑磁图（MEG）的四通道光泵原子磁力计，它采用了被动衍射光学元件（DOE）。DOE使我们能够在头部紧凑的基底面上实现18 mm长的梯度仪基线。使用梯度测量，通道的灵敏度< 5 fT/Hz（1/2），3 dB带宽约为90 Hz，这两个都足以执行MEG。此外，通道高度均匀，这提供了采用标准MEG后处理技术的可能性。该模块将作为磁源定位阵列的构建模块。(C)2016美国光学学会
We have developed a four-channel optically pumped atomic magnetometer for magnetoencephalography (MEG) that incorporates a passive diffractive optical element (DOE). The DOE allows us to achieve a long, 18-mm gradiometer baseline in a compact footprint on the head. Using gradiometry, the sensitivities of the channels are < 5 fT/Hz(1/2), and the 3-dB bandwidths are approximately 90 Hz, which are both sufficient to perform MEG. Additionally, the channels are highly uniform, which offers the possibility of employing standard MEG post-processing techniques. This module will serve as a building block of an array for magnetic source localization. (C) 2016 Optical Society of America