Effects of laser phase noise on the injection of a high-finesse cavity.
We study the response of a high-finesse optical cavity to a cw laser during the laser frequency passage through resonance. For a laser that is spectraly larger than the cavity resonance, laser-field phase fluctuations are converted into amplitude fluctuations, and cavity injection is intrinsically noisy. We develop a model based on Schawlow-Townes spontaneous-emission laser broadening and discuss in detail its effects on high-sensitivity spectroscopic techniques such as cavity-enhanced absorption or cavity ring-down spectroscopy. We present realistic simulations of cavity injection during a sweep through resonance and calculation of statistical quantities such as the average injection efficiency. Agreement with experimental observations is established.
Morville
Jérĵme
J
Laboratoire de Spectrométrie Physique, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 5588, Université J. Fourier-Grenoble I, BP 87, 38402 Saint Martin d'Hères Cedex, France. jerome.morville@uif-grenoble.fr
Romanini
Daniele
D
Chenevier
Marc
M
Kachanov
Alexander
A