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Noise considerations for locking to the center of a Lorentzian line
Auteur(s)
Date de parution
1999
In
Physical Review A, American Physical Society (APS), 1999/59/1/773–777
Résumé
Many areas of science require locking a probe signal to the center of a Lorentzian line. In this paper we experimentally explore the limits to the resolution for locking a sine-wave modulated probe signal to a Lorentzian line. Surprisingly we find that in some cases relatively high-frequency phase modulation (PM) noise on the probe signal (even 100 times the linewidth of the resonance) can significantly degrade the stability of the lock. The 6.835-GHz hyperfine transition in 87Rb was used as a test bed for these studies because it affords very high resolution for investigating this effect. The details presented here should prove useful for testing a complete theory of this effect and give some insight into the requirements of PM noise of local oscillators to be locked to a Lorentzian line.
Identifiants
Type de publication
journal article
