A high-sensitivity tunable two-beam fiber-coupled high-density magnetometer with laser heating

Savukov, Igor Mykhaylovich; Boshier, Malcolm Geoffrey

doi:10.3390/s16101691

Title: A high-sensitivity tunable two-beam fiber-coupled high-density magnetometer with laser heating

Journal Article · Thu Oct 13 00:00:00 EDT 2016 · Sensors

DOI:https://doi.org/10.3390/s16101691· OSTI ID:1351185

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Atomic magnetometers (AM) are finding many applications in biomagnetism, national security, industry, and science. Fiber-coupled (FC) designs promise to make them compact and flexible for operation. Most FC designs are based on a single-beam configuration or electrical heating. Here, we demonstrate a two-beam FC AM with laser heating that has 5 fT/Hz^1/2 sensitivity at low frequency (50 Hz), which is higher than that of other fiber-coupled magnetometers and can be improved to the sub-femtotesla level. Here, this magnetometer is widely tunable from DC to very high frequencies (as high as 100 MHz; the only issue might be the application of a suitable uniform and stable bias field) with a sensitivity under 10 fT/Hz^1/2 and can be used for magneto-encephalography (MEG), magneto-cardiography (MCG), underground communication, ultra-low MRI/NMR, NQR detection, and other applications.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1351185

Report Number(s):: LA-UR-15-24035; SENSC9

Journal Information:: Sensors, Vol. 16, Issue 10; ISSN 1424-8220

Publisher:: MDPI AGCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 11 works

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In-Situ Measurement of Electrical-Heating-Induced Magnetic Field for an Atomic Magnetometer Lu, Jixi; Wang, Jing; Yang, Ke Sensors, Vol. 20, Issue 7 https://doi.org/10.3390/s20071826	journal	March 2020

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Title: A high-sensitivity tunable two-beam fiber-coupled high-density magnetometer with laser heating

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