All-optical single-species cesium atomic comagnetometer with optical free induction decay detection

Atomic comagnetometers, which measure the spin precession frequencies of overlapped species simultaneously, are widely applied to search for exotic spin-dependent interactions. Here we propose and implement an all-optical single-species Cs atomic comagnetometer based on optical free induction decay (FID) signal atoms in hyperfine levels $$F_{g}$$ = 3 4 within same ensemble. We experimentally show that systematic errors induced by magnetic field gradients pump light highly suppressed comagnetometer. With further optimization, has potential be searches