Determination of the atomic density of rubidium-87
Zhao Meng, Zhang Kai, Chen Li-Qing†
       
(a) Energy levels of 87Rb atom. (b) Time sequence. (c) Experimental layout. C: the pure 87Rb atomic vapor; PBS: polarized beam splitter; HWP: half wave plate; D1: single photon detector; SMF: single mode fiber; AOM: acousto-optical modulator; F: fluorescence; OP1 and OPF: optical pumping lasers.