Noise considerations for locking to the center of a Lorentzian line
Jennings, D. A.
Date de parution
Physical Review A
De la page
A la page
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 Rb-87 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. [S1050-2947(99)02401-4].
Type de publication
Resource Types::text::journal::journal article