Laser Power Stabilization with a Cesium FADOF

SummaryWe achieve the stabilization of the laser power using a cesium Faraday anomalous dispersion optical filter (FADOF). We measured the transmission spectrum of the FADOF. In the transition line of 6s ² S 1/2 F=4→6p ² P 3/2 for cesium at the wavelength of 852 nm, when the laser frequency is constant, the transmission of FADOF increases rapidly and then decreases as the probe laser intensity increases. The negative correlation between FADOF transmission and laser intensity can be used to stabilize the laser power. Therefore, we tune the laser frequency to the cesium 6s ² S 1/2 F=4→6p ² P 3/2 transition line, then the power of the laser passing through the FADOF is expected to be stabilized. This work can be applied to the precision measurement field, such as atomic clocks, atomic gravimeters, atomic magnetometers, etc.