Abstract
We present an investigation of double resonance optical pumping-polarization spectroscopy (DROP-PS) of an excited state transition based on the cesium 6S1∕2- 6P3∕2- 8S1∕2 ladder-type atomic system in a room-temperature vapor cell. A linearly polarized probe beam populates the atoms from ground state 6S1∕2 to intermediate state 6P3∕2, and then DROP-PS signal is obtained by detecting the anisotropy of atomic medium on the 6P3∕2 state induced by a circularly polarized coupling beam operated on the 6P3∕2 - 8S1∕2 transition. This DROP-PS signal with dispersive shape is suitable for locking a laser to an excited state transition.
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