Speaker
Description
Helium optically pumped magnetometers (He-OPMs) offer high sensitivity, wide bandwidth, and room-temperature operation, making them suitable for precision magnetic-field measurements. When operated with linearly polarized optical pumping, the light propagation direction and polarization axis provide two intrinsic reference vectors, allowing orientation-related information beyond scalar magnetometry. By applying an oscillating magnetic field at the Larmor frequency, such information can be extracted from the harmonic components of the transmitted optical signal, whose amplitudes and phases reflect the magnetic field relative to the optical reference frame. In this work, dedicated FPGA-based digital signal processing electronics are designed for a linearly pumped He-OPM. The architecture enables real-time detection of the DC component as well as the fundamental and second harmonics, avoiding complex analog demodulation. Experimental results obtained under two-dimensional magnetic-field configurations are presented and show good agreement with the proposed model and analysis approach.
| Minioral | Yes |
|---|---|
| IEEE Member | No |
| Are you a student? | Yes |