Figure 1

(a) Rb level structure and configuration of laser fields. The pump field is circularly polarized; the probe field is not polarized and can be viewed as a noncoherent mixture of left and right circular polarized light. (b) A three-level model is used in our simulations. Relaxation of population $\gamma$ is shown by undulating arrows. The simple model also accounts for flight time broadening at rate ${\gamma }_{\mathrm{out}}$ out of the system from all levels, and population relaxation from electronic excited states $|m=-1⟩$ and $|m=+1⟩$ to other than $|f,m=0⟩$ levels of ground state manifold via spontaneous decay. Note that for our simulation we use a simplified three-level model; the real D1 line of Rb has three sets of similar three-level systems: $|m=-2⟩\leftrightarrow |f,m=-1⟩\leftrightarrow |m=0⟩$, $|m=0⟩\leftrightarrow |f,m=+1⟩\leftrightarrow |m=2⟩$, and the one shown above.Reuse & Permissions

Figure 2

Experimental setup.Reuse & Permissions

Figure 3

Doppler-free resonances on the transition for (a) zero magnetic field $B=0$ and (b),(c) opposite directions of magnetic field $B=77$ Gauss.Reuse & Permissions

Figure 4

Relative difference between absorption curves recorded for opposite directions of magnetic field ($B=\pm 77$ Gauss).Reuse & Permissions

Figure 5

Crosses: The laser light induced variation of absorption versus magnetic field. Solid line: The calculated laser induced relative variation of absorption versus magnetic field.Reuse & Permissions