Fig. 4: Schematic diagram of the experimental setup for elliptically polarized laser pumped magnetometers.
From: Metasurface-integrated elliptically polarized laser-pumped SERF magnetometers

Elliptically polarized light propagating along the z-axis was utilized to polarize Rb atoms and detect the optical rotation angles simultaneously. PBS: polarized beam splitter. TIA Transimpedance amplifier, LIA Lock-in amplifier, DAQ Data acquisition