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Unshielded three-axis vector operation of a spin-exchange-relaxation-free atomic magnetometer
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View: Figures


Image of FIG. 1.
FIG. 1.

Setup of the unshielded SERF magnetometer operating in vector mode. Optical rotation of the probe beam is detected using a polarizing beamsplitter oriented at to the beam’s initial polarization by subtracting the two photodiode signals. The inset shows the orthogonality of the magnetometer response.

Image of FIG. 2.
FIG. 2.

(a) The dispersion curves obtained near the resonance for a vector SERF magnetometer (triangles) and a scalar magnetometer with rf modulation (squares) or amplitude-modulated pump beam (circles), all in a magnetically unshielded environment. The slopes near the resonance provide the relative intrinsic sensitivities of different magnetometer modes. (b) The dispersion curve obtained from a SERF magnetometer in a magnetically shielded environment with a linewidth of (see Ref. 7).

Image of FIG. 3.
FIG. 3.

The spectrum of the magnetic noise in the SERF vector magnetometer for a single channel and the difference of two channels. Also shown is the optical noise obtained in the absence of pumping light.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Unshielded three-axis vector operation of a spin-exchange-relaxation-free atomic magnetometer