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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 24, Iss. 7 — Jul. 1, 2007
  • pp: 1482–1489

All optical sensor for automated magnetometry based on coherent population trapping

J. Belfi, G. Bevilacqua, V. Biancalana, Y. Dancheva, and L. Moi  »View Author Affiliations


JOSA B, Vol. 24, Issue 7, pp. 1482-1489 (2007)
http://dx.doi.org/10.1364/JOSAB.24.001482


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Abstract

An automated magnetometer suitable for long lasting measurement under stable and controllable experimental conditions has been implemented. The device is based on coherent population trapping (CPT) produced by a multifrequency excitation. CPT resonance is observed when a frequency comb, generated by diode laser current modulation, excites Cs atoms confined in a π 4 × ( 2.5 ) 2 × 1 cm 3 , 2   Torr N 2 buffered cell. A fully optical sensor is connected through an optical fiber to the laser head allowing for truly remote sensing and minimization of the field perturbation. A detailed analysis of the CPT resonance parameters as a function of the optical detuning has been made in order to get high sensitivity measurements. The magnetic field monitoring performances and the best sensitivity obtained in a balanced differential configuration of the sensor are presented.

© 2007 Optical Society of America

OCIS Codes
(020.1670) Atomic and molecular physics : Coherent optical effects
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(300.6380) Spectroscopy : Spectroscopy, modulation

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: November 10, 2006
Revised Manuscript: February 23, 2007
Manuscript Accepted: March 14, 2007
Published: June 15, 2007

Citation
J. Belfi, G. Bevilacqua, V. Biancalana, Y. Dancheva, and L. Moi, "All optical sensor for automated magnetometry based on coherent population trapping," J. Opt. Soc. Am. B 24, 1482-1489 (2007)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-24-7-1482

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