Revisiting the laser frequency locking method using acousto-optic frequency modulation transfer spectroscopy

Yukun Luo; Shuhua Yan; Aiai Jia; Chunhua Wei; Zehuan Li; Enlong Wang; Jun Yang

doi:doi:10.3788/COL201614.121401

Chinese Optics Letters, 2016, 14 (12): 121401, Published Online: Aug. 2, 2018

Revisiting the laser frequency locking method using acousto-optic frequency modulation transfer spectroscopy Download： 1123次

Yukun Luo ^1,2Shuhua Yan ^1,2,*Aiai Jia ^1,2Chunhua Wei ^1,2Zehuan Li ^1,2Enlong Wang ^1,2Jun Yang ^1,2

Author Affiliations

¹ Department of Instrument Science and Technology, College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha 410073, China

² Interdisciplinary Center for Quantum Information, National University of Defense Technology, Changsha 410073, China

Figures & Tables

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

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

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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.

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

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

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Fig. 6. ADEV of the MTS locked laser.

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

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Yukun Luo, Shuhua Yan, Aiai Jia, Chunhua Wei, Zehuan Li, Enlong Wang, Jun Yang. Revisiting the laser frequency locking method using acousto-optic frequency modulation transfer spectroscopy[J]. Chinese Optics Letters, 2016, 14(12): 121401.

Revisiting the laser frequency locking method using acousto-optic frequency modulation transfer spectroscopy Download： 1123次

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. 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.

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Revisiting the laser frequency locking method using acousto-optic frequency modulation transfer spectroscopy Download： 1123次

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. 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.

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