Abstract

An optical frequency comb based on Yb:ring fiber laser was demonstrated. This is the first time, to our knowledge, $f_{\mathrm{ceo}}$ has been generated directly from the oscillator without further amplifications above 500 MHz repetition rate. The signal-to-noise ratio of the offset frequency was above 40 dB at 300 kHz resolution bandwidth, which supports easy stabilization. The offset frequency was stabilized for more than 6 h in an open air environment without temperature control. The stabilized repetition rate has an in-loop tracking stability of $4.46\times {10}^{-13}/{\tau }^{1/2}$.

© 2014 Optical Society of America

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