Fig. 5

Characterization of the atomic filtering system for Stokes photons. Data points correspond to a measurement of absorption of the weak probe beam while fit is the theoretical prediction of OD based on a Voigt-profile absorption model including optical pumping. Inset shows the OD in a larger scale (only the fitted function), demonstrating very high attenuation of write laser light (ν − ν ₀ = 4.3 GHz detuning). Simultaneously, high transmission of S photons (ν − ν ₀ = −2.5 GHz detuning) is achieved. Similar characteristics were also obtained for the AS filter. Detuning is given with respect to the line centroid at ν ₀. Two more central absorption peaks corresponds to a residual amount of ⁸⁵Rb in the filtering glass cell. Experimental errorbars correspond to one standard mean error derived from many collected spectra