A high-sensitivity tunable two-beam fiber-coupled high-density magnetometer with laser heating
- 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/Hz1/2 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/Hz1/2 and can be used for magneto-encephalography (MEG), magneto-cardiography (MCG), underground communication, ultra-low MRI/NMR, NQR detection, and other applications.
- 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
Web of Science
Avoiding the impact of the heater-induced longitudinal field on atomic magnetometers
|
journal | December 2018 |
In-Situ Measurement of Electrical-Heating-Induced Magnetic Field for an Atomic Magnetometer
|
journal | March 2020 |
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