Design of low-noise, fast-response electronics for high-performance helium optically pumped magnetometers

High-sensitivity and wide-bandwidth magnetometers are crucial for both terrestrial and space-based geophysical applications. In this work, we present an electronics design tailored for a helium optically pumped magnetometer (He-OPM) operating under ambient geomagnetic field conditions. The proposed design features low noise and fast response, which are critical for achieving high bandwidth and high sensitivity in He-OPMs. In addition, a phase compensation method is introduced to reduce phase err