Magnetic field imaging with microfabricated optically-pumped magnetometers

被引：99

作者：

Alem, Orang ^{[1
,2
]}

Mhaskar, Rahul ^{[1
,2
]}

Jimenez-Martinez, Ricardo ^{[1
,2
]}

Sheng, Dong ^{[1
,2
]}

LeBlanc, John ^{[3
]}

Trahms, Lutz ^{[4
]}

Sander, Tilmann ^{[4
]}

Kitching, John ^{[1
]}

Knappe, Svenja ^{[1
,2
]}

机构：

[1] NIST, 325 Broadway, Boulder, CO 80305 USA

[2] Univ Colorado, Boulder, CO 80309 USA

[3] Charles Stark Draper Lab Inc, 555 Technol Sq, Cambridge, MA 02139 USA

[4] Phys Tech Bundesanstalt, Abbestr 2-12, D-10587 Berlin, Germany

来源：

OPTICS EXPRESS | 2017年 / 25卷 / 07期

关键词：

MAGNETOENCEPHALOGRAPHY;

D O I：

10.1364/OE.25.007849

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A multichannel imaging system is presented, consisting of 25 microfabricated optically-pumped magnetometers. The sensor probes have a footprint of less than 1 cm(2) and a sensitive volume of 1.5 mm x 1.5 mm x 1.5 mm and connect to a control unit through optical fibers of length 5 m. Operating at very low ambient magnetic fields, the sensor array has an average magnetic sensitivity of 24 fT/Hz(1/2), with a standard deviation of 5 fT/Hz(1/2) when the noise of each sensor is averaged between 10 and 50 Hz. Operating in Earth's magnetic field, the magnetometers have a field sensitivity around 5 pT/Hz(1/2). The vacuum-packaged sensor heads are optically heated and consume on average 76 +/- 7 mW of power each. The heating power is provided by an array of eight diode lasers. Magnetic field imaging of small probe coils was obtained with the sensor array and fits to the expected field pattern agree well with the measured data. (C) 2017 Optical Society of America

引用

页码：7849 / 7858

页数：10

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