Investigation of the nonlinear CPT spectrum of <sup>87</sup>Rb and its application for large dynamic magnetic measurement<xref rid="cpb_26_6_064203_fn1" ref-type="fn">*</xref> <fn id="cpb_26_6_064203_fn1"> <label>*</label> <p>Project supported by the National Natural Science Foundation of China (Grant No. 61473166) and China Postdoctoral Science Foundation (Grant No. 014M560958).</p> </fn>

Investigation of the nonlinear CPT spectrum of ⁸⁷Rb and its application for large dynamic magnetic measurement* *

Project supported by the National Natural Science Foundation of China (Grant No. 61473166) and China Postdoctoral Science Foundation (Grant No. 014M560958).

Xu Chi^{1, 2}, Wang Shi-Guang^{2, 3}, Hu Yong^{2, 3}, Feng Yan-Ying^{2, 3, †}, Wang Li-Jun^{1, 2, 3, ‡}

(color online) (a) Energy level of the ⁸⁷Rb atom with the transition. The and component of the linear polarized light are plotted as dash and solid lines, respectively. The levels belonging to the group N = 0 are plotted with bold lines. These resonances result in 7 resonant peaks in the CPT spectrum which can be classified to 3 groups due to their behavior in the external field. For simplicity, the energy shift of the excited levels is not shown. (b) Schematic diagram of the electric and optical layout of the system. Control sections 1 and 2 are shown in the dash boxes. The quarter-wave plate is for observation of the CPT spectrum excited by differently polarized light. In the lin ∥ lin configure for the magnetometer experiment, the fast axis of the quarter-wave plate is set along the polarization of the linearly polarized light.