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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 33 — Nov. 20, 2013
  • pp: 8048–8053

Polarization-enhanced absorption spectroscopy for laser stabilization

Paul D. Kunz, Thomas P. Heavner, and Steven R. Jefferts  »View Author Affiliations

Applied Optics, Vol. 52, Issue 33, pp. 8048-8053 (2013)

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We demonstrate a variation of pump-probe spectroscopy that is particularly useful for laser frequency stabilization. The polarization-enhanced absorption spectroscopy (POLEAS) signal provides a significant improvement in signal-to-noise ratio over saturated absorption spectroscopy (SAS) for the important and commonly used atomic cycling transitions. The improvements can directly increase the short-term stability of a laser frequency lock, given sufficient servo loop bandwidth. The long-term stability of the POLEAS method, which is limited by environmental sensitivities, is comparable to that of SAS. The POLEAS signal is automatically Doppler-free, without requiring a separate Doppler subtraction beam, and lends itself to straightforward compact packaging. Finally, by increasing the amplitude of the desired (cycling) peak, while reducing the amplitude of all other peaks in the manifold, the POLEAS method eases the implementation of laser auto-locking schemes.

OCIS Codes
(000.2170) General : Equipment and techniques
(300.1030) Spectroscopy : Absorption
(300.6170) Spectroscopy : Spectra
(300.6360) Spectroscopy : Spectroscopy, laser
(140.3425) Lasers and laser optics : Laser stabilization

ToC Category:

Original Manuscript: May 23, 2013
Revised Manuscript: August 28, 2013
Manuscript Accepted: September 16, 2013
Published: November 15, 2013

Paul D. Kunz, Thomas P. Heavner, and Steven R. Jefferts, "Polarization-enhanced absorption spectroscopy for laser stabilization," Appl. Opt. 52, 8048-8053 (2013)

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