Spin noise spectroscopy of rubidium atomic gas under resonant and non-resonant conditions

Ma Jian¹, Shi Ping¹, Qian Xuan¹, Li Wei², Ji Yang^{1, †,}

Ground state spin fluctuation of ⁸⁵Rb at different detunings of the probe laser from the D2 optical transition. The laser power P = 300 μW, T = 318 K, B = 10 G. (a) Integrated SNS (black squares) and fitting curve (red lines) as a function of the laser detuning from the D2 transition of ⁸⁵Rb. (b) The absorption spectrum of Rb.