Fig. 1. (a) Experimental setup of the two types of Faraday laser. (b) Relevant energy level diagram.

Fig. 2. (Color online) Measured transmission spectrums of the LESFADOF with different cell temperatures in a static axial magnetic field of 500 G.

Fig. 3. (Color online) (a) Measured absorption spectrum of the LESFADOF. (b) The measured transmission spectrum (black curve) of the LESFADOF with transmittance of 46% and the measured transmission spectrum (red curve) with strong optical feedback by Rc. (c) The measured transmission spectrum with maximum transmittance of 46% of the LESFADOF with no optical feedback (black curve), weak optical feedback (red curve), and strong optical feedback (green curve) by Rc. (d) The optical signal of the laser frequency being stabilized to the peak of the transmission spectrum detected by a PD when the optical bread board is beaten.

Fig. 4. Self-evaluated Allan deviation of the frequency stability of the Faraday laser realized by the ECDL.

Fig. 5. (a) Measured optical intensity fluctuations of the Faraday laser realized by the ARLD during 24 h. (b) The self-evaluated Allan deviation of the frequency stability of the Faraday laser realized by the ARLD.