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

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.
Authors:
 [1] ; ;  [2] ;  [1] ;  [3]
  1. ICFO – Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona (Spain)
  2. Center for Magneto-Optical Research Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Krakow (Poland)
  3. (Spain)
Publication Date:
OSTI Identifier:
22392220
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; MAGNETOMETERS; NOISE; PHOTONS; RELAXATION; RUBIDIUM 85; SENSITIVITY; SENSORS; TEMPERATURE RANGE 0273-0400 K; VAPORS