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We present full phase stabilization of an amplified Yb:fiber femtosecondfrequency comb using an intra-cavity electro-optic modulator and anacousto-optic modulator. These transducers provide high servo bandwidths of 580kHz and 250 kHz for frep and fceo, producing a robust and low phase noise fiberfrequency comb. The comb was self-referenced with an f - 2f interferometer andphase locked to an ultra-stable optical reference used for the JILA Sr opticalclock at 698 nm, exhibiting 0.21 rad and 0.47 rad of integrated phase errors(over 1 mHz - 1 MHz) respectively. Alternatively, the comb was locked to twooptical references at 698 nm and 1064 nm, obtaining 0.43 rad and 0.14 rad ofintegrated phase errors respectively.

Full phase stabilization of a Yb:fiber femtosecond frequency comb via high-bandwidth transducers