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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 29, Iss. 23 — Dec. 1, 2004
  • pp: 2704–2706

Laser frequency locking by direct measurement of detuning

A. Ratnapala, C. J. Vale, A. G. White, M. D. Harvey, N. R. Heckenberg, and H. Rubinsztein-Dunlop  »View Author Affiliations


Optics Letters, Vol. 29, Issue 23, pp. 2704-2706 (2004)
http://dx.doi.org/10.1364/OL.29.002704


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Abstract

We present a new method of laser frequency locking in which the feedback signal is directly proportional to the detuning from an atomic transition, even at detunings many times the natural linewidth of the transition. Our method is a form of sub-Doppler polarization spectroscopy, based on measuring two Stokes parameters (I2 and I3) of light transmitted through a vapor cell. It extends the linear capture range of the lock loop by as much as an order of magnitude and provides frequency discrimination equivalent to or better than those of other commonly used locking techniques.

© 2004 Optical Society of America

OCIS Codes
(140.3460) Lasers and laser optics : Lasers
(300.6210) Spectroscopy : Spectroscopy, atomic

Citation
A. Ratnapala, C. J. Vale, A. G. White, M. D. Harvey, N. R. Heckenberg, and H. Rubinsztein-Dunlop, "Laser frequency locking by direct measurement of detuning," Opt. Lett. 29, 2704-2706 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-23-2704

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