Fig. 1. Experimental setup of the AOMTS system. ISO, optical isolator; PBS, polarizing beam splitters; LPF, low-pass filter; AMP, amplifier.

Fig. 2. Typical saturated absorption spectrum and MTS signal.

Fig. 3. Numerical and experimental results of parameter sweeping: (a)the achievable maximal locking slope versus the modulation frequency; (b) the optimal modulation index (blue) and the upper limit restricted by the AOM bandwidth (red); (c) the achievable maximal locking slope versus the modulation index; (d) the optimal demodulation phase versus the modulation frequency and index; (e) the measured FWHM linewidth versus the modulation index at 4 MHz in comparison with the theoretical prediction; and (f) the measured FWHM linewidth versus the modulation frequency at β=0.7 in comparison with the theoretical prediction.

Fig. 4. FWHM linewidth and the residual error STD of the MTS signal at different modulation frequencies.

Fig. 5. Beat note spectrum between two MTS locked lasers.

Fig. 6. ADEV of the MTS locked laser.

Fig. 7. (a) Measured frequency shift and (b) the residual error in comparison with the expected curve.