EXPERIMENTAL PROGRESS USING NONLINEAR OPTICS FOR PRECISION-MEASUREMENTS OF THE NUCLEAR WEAK CHARGE IN THE 6S-7S CS TRANSITION

We report on the current status of our novel experiment designed for precision measurements of parity violation in the forbidden 6S-7S Cs transition. Pulsed 6S-7S excitation in a longitudinal E-field gives rise to large 7S-6P population inversion and subsequent transient amplification of a probe beam, as large as 100%. Dependence on the relative orientation of the excitation and probe polarizations is measured with a sensitive differential polarimeter. We present a calibration procedure circumventing all complications from nonlinear processes, which can thus be exploited to enhance the parity violating asymmetry. © 1990.