Abstract
We present a laser frequency locking system based on acousto-optic
modulation transfer spectroscopy (AOMTS). Theoretical and experimental
investigations are carried out to optimize the locking performance mainly
from the view of the modulation frequency and index for the specific
scheme of AOMTS. An FWHM linewidth of 63 kHz is achieved and the frequency
stability in terms of Allan standard deviation reaches
1.4×10−12 at 30 s. The frequency shifting capacity is
validated throughout the acousto-optic modulator bandwidth while the laser
is kept locked. This work offers a different but efficient choice for
applications calling for both stabilized and tunable laser
frequencies.
© 2016 Chinese Laser Press
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