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Effects of modulation on signals obtained in saturated absorption spectroscopy experiments

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Abstract

An analysis of the useful signals detected in saturated absorption spectroscopy experiments is given. Both Gaussian and plane-wave fields are considered. The various cases of unmodulated, square-wave modulated and sinusoidally modulated saturating beams are examined. It is found that square-wave and sinusoidal modulations give different results. The first is identical to no modulation, and detection at the fundamental frequency records a fraction of the total signal which is also a square wave. The second gives fundamental or higher-harmonic signals each with a very different dependence on the saturation parameter. The signal at the fundamental saturates faster and more completely than that for square-wave modulation. The results suggest experimental methods for the determination of the absolute value of the saturation parameter.

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Author notes

  1. A. Dienes

    Present address: Dept. of Electrical Engineering, University of California, Davis, Davis, California, USA

Authors and Affiliations

  1. Centre de Physique Moléculaire, Optique et Hertzienne, Laboratoire associé au C.N.R.S., Université de Bordeaux I, F-33405, Talence, France

    B. Couillaud, A. Ducasse & A. Dienes

Authors
  1. B. Couillaud
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  2. A. Ducasse
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  3. A. Dienes
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Couillaud, B., Ducasse, A. & Dienes, A. Effects of modulation on signals obtained in saturated absorption spectroscopy experiments. Appl. Phys. 16, 359–365 (1978). https://doi.org/10.1007/BF00885860

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  • DOI: https://doi.org/10.1007/BF00885860

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