A cesium cell with laser beam multipass

Abstract

We describe a cesium cell designed to study the light emitted (e.g. by fluorescence) by cesium vapour excited by a laser beam for which the absorption is negligible. Efficient multipass of the laser beam increases the emitted light intensity by two orders of magnitude while suppressing some undesired signals by a large factor. This sample cell is currently used in a search for weak neutral current parity violation in cesium; it is also suitable for optical pumping on weakly absorbed lines