Optical delay with spectral hole burning in Doppler-broadened cesium vapor

摘要

The full frequency dependence of the optical delay in the Cs D_(1) (6~(2)S_(1/2)-6~(2)P_(1/2)) line has been observed, including all four hyperfine split components. Pulse delays of 1.6 ns to 24.1 ns are obtained by scanning across the hyperfine splitting associated with the lower ~(2)S_(1/2) state. Optical control of pulse delays in cesium vapor was demonstrated by pumping the D_(2) (6~(2)S_(1/2)-6~(2)P_(3/2)) transition and observing resulting holes in the D_(1) delay spectrum. For a pump at four times the saturation intensity, the pulse delays are reduced by a maximum of 78percent in a narrow region of 110 MHz. The frequency dependence of the delays of the probe laser in the vicinity of the spectral holes agrees with a Kramers-Kronig model prediction.