Two Photon Polarization Spectroscopy

Abstract
Dichroism and birefringence are studied for the case of a strong saturating laser and a linearly polarized weak probe laser interacting with a dilute gas. For linearly or circularly polarized saturating laser fields the optical analog of the Kerr or Faraday effect are obtained respectively. Two photon, Doppler-free polarization effects are studied for two and three level systems (J = 0 → J = 1 and J = 0 → J = 1 → J = 0). The transition from the Autler-Townes effect conditions to those of the Lamb-dip is examined as a function of the system Doppler width