Nonlinear magneto-optical rotation with frequency-modulated light in the geophysical field range
- Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300 (United States)
Recent work investigating resonant nonlinear magneto-optical rotation (NMOR) related to long-lived ({tau}{sub rel}{approx}1s) ground-state atomic coherences has demonstrated potential magnetometric sensitivities exceeding 10{sup -11} G/{radical}(Hz) for small (< or approx. 1 {mu}G) magnetic fields. In the present work, NMOR using frequency-modulated light (FM NMOR) is studied in the regime where the longitudinal magnetic field is in the geophysical range({approx}500mG), of particular interest for many applications. In this regime a splitting of the FM NMOR resonance due to the nonlinear Zeeman effect is observed. At sufficiently high light intensities, there is also a splitting of the FM NMOR resonances due to ac Stark shifts induced by the optical field, as well as evidence of alignment-to-orientation conversion type processes. The consequences of these effects for FM-NMOR-based atomic magnetometry in the geophysical field range are considered.
- OSTI ID:
- 20787274
- Journal Information:
- Physical Review. A, Vol. 73, Issue 5; Other Information: DOI: 10.1103/PhysRevA.73.053404; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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