Polarization spectroscopy of an excited state transition.
We demonstrate polarization spectroscopy of an excited state transition in room-temperature cesium vapor. An anisotropy induced by a circularly polarized pump beam on the D2 transition is observed using a weak probe on the 6P(3/2)→7S(1/2) transition. At high pump power, a subfeature due to Autler-Townes splitting is observed that theoretical modeling shows is enhanced by Doppler averaging. Polarization spectroscopy provides a simple modulation-free signal suitable for laser frequency stabilization to excited state transitions.
Department of Physics, Durham University, South Road, Durham, DH1 3LE, UK.
Christopher
C
Carr
Charles S
CS
Adams
Kevin J
KJ
Weatherill