Shot-noise-limited magnetometer with sub-picotesla sensitivity at room temperature

Journal Article · Sat Nov 15 00:00:00 EST 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4901588· OSTI ID:22392220

Anielski, Pawel; Gawlik, Wojciech ^[1]; Mitchell, Morgan W. ^[2]

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1. Center for Magneto-Optical Research Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Krakow (Poland)
2. ICFO – Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona (Spain)

We report a photon shot-noise-limited (SNL) optical magnetometer based on amplitude modulated optical rotation using a room-temperature {sup 85}Rb vapor in a cell with anti-relaxation coating. The instrument achieves a room-temperature sensitivity of 70 fT/√(Hz) at 7.6 μT. Experimental scaling of noise with optical power, in agreement with theoretical predictions, confirms the SNL behaviour from 5 μT to 75 μT. The combination of best-in-class sensitivity and SNL operation makes the system a promising candidate for application of squeezed light to a state-of-the-art atomic sensor.

• OSTI ID: 22392220
• Journal Information: Review of Scientific Instruments, Vol. 85, Issue 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
MAGNETOMETERS
NOISE
PHOTONS
RELAXATION
RUBIDIUM 85
SENSITIVITY
SENSORS
TEMPERATURE RANGE 0273-0400 K
VAPORS