Spin-exchange relaxation of naturally abundant Rb in a K–Rb–<sup>21</sup>Ne self-compensated atomic comagnetometer

Spin-exchange relaxation of naturally abundant Rb in a K–Rb–²¹Ne self-compensated atomic comagnetometer

Lu Yan¹, Zhai Yueyang^{2, 3, 4}, Zhang Yong¹, Fan Wenfeng¹, Xing Li¹, Quan Wei^{2, 3, 4, †}

Experimental setup of the K–Rb–²¹Ne comagnetometer (not to scale). PDA, photodiode amplifier; PD, photodetector; TA, tapered amplifier; GT, Glan–Thompson polarizer; PBS, polarization beam splitter; BE, beam expander; NE, noise eater; PEM, photoelastic modulator.