Using an extracavity acousto-optic frequency modulator to stabilize the offset frequency of the fiber optical comb generator

A fiber optical frequency comb generator stabilized to an optical frequency standard based on a single ytterbium ion (
¹⁷¹
Yb
⁺
) was created. An extracavity acousto-optic frequency modulator (AOFM) was used to stabilize the comb offset frequency. It allowed increasing the bandwidth of the feedback loop that stabilizes the offset frequency to several tens of kilohertz. The stabilization of the entire frequencies was achieved using an intracavity electro-optic modulator (EOM) based on a KTP crystal. This approach made it possible to minimize the noise that stabilization systems contribute to the output frequencies of the comb generator.