@article{Bobrov_2020,
	doi = {10.1088/1742-6596/1697/1/012175},
	url = {https://doi.org/10.1088/1742-6596/1697/1/012175},
	year = 2020,
	month = {dec},
	publisher = {{IOP} Publishing},
	volume = {1697},
	pages = {012175},
	author = {M A Bobrov and S A Blokhin and N A Maleev and A A Blokhin and A P Vasyl'ev and A G Kuzmenkov and A S Pazgalev and M V Petrenko and S P Dmitriev and A K Vershovskii and V M Ustinov and I I Novikov and L Ya Karachinskii},
	title = {Optically pumped non-zero field magnetometric sensor for the magnetoencephalographic systems using intra-cavity contacted {VCSELs} with rhomboidal oxide current aperture},
	journal = {Journal of Physics: Conference Series},
	abstract = {We demonstrate the possibility of using vertical-cavity surface emitting lasers with intracavity contacts and a rhomboidal oxide current aperture for creating compact optically pumped 133Cs atomic magnetometer operating in non-zero magnetic fields, which is promising to use in magnetoencephalographic systems. The magnetic resonance parameters were studied in a two-beam MX optically pumped magnetic field sensor scheme based on the effect of the magnetic resonance line narrowing at high laser pumping and high concentrations of alkali-metal atoms. The ultimate sensitivity of OPM was estimated by the ratio of the magnetic resonance steepness to the probe light shot noise level. It is shown that a magnetic sensor based on the vertical-cavity surface emitting lasers and a compact (0.125 cm3 volume) Cs vapor cell can achieve a shot noise-limited sensitivity better than 15 fT in 1 Hz bandwidth. Developed intracavity contacted VCSELs suitable for use in compact atomic magnetometers for magnetoencephalographic systems.}
}