A dual-axis, high-sensitivity atomic magnetometer<xref rid="cpb_26_12_120702_fn1" ref-type="fn">*</xref> <fn id="cpb_26_12_120702_fn1"> <label>*</label> <p>Project supported by the National Natural Science Foundation of China (Grant Nos. 61227902, 61673041, and 61374210), the National Key R & D Program of China (Grant No. 2016YFB0501601), and the Academic Excellence Foundation of Beihang University (BUAA) for PhD Students.</p> </fn>

A dual-axis, high-sensitivity atomic magnetometer* *

Project supported by the National Natural Science Foundation of China (Grant Nos. 61227902, 61673041, and 61374210), the National Key R & D Program of China (Grant No. 2016YFB0501601), and the Academic Excellence Foundation of Beihang University (BUAA) for PhD Students.

Li Rujie^†, Quan Wei^‡, Fan Wenfeng, Xing Li, Wang Zhuo, Zhai Yueyang, Fang Jiancheng

(color online) Side view of the dual-axis SERF AM. It has an outer dimension of 350 mm × 325 mm × 250 mm and most of the elements therein are home-built. The probe laser (located at the beginning of the pink arrow) has been assembled in the sensor head and it splits into Ch1 (blue arrow) and Ch2 (green arrow) probe beams, which output the response of Ch1 AM and Ch2 AM. The pump laser is introduced into the system by a fiber feedthrough (not shown), and fiber collimator held at the beginning of the red arrow output the pump beam. Most of the elements are made of non-magnetic and non-metallic materials to minimize the residual field and field inhomogeneities around the vapor cell. Details of the optical layout are illustrated in Fig. 1.