Abstract
In this paper, a nonlinear amplification system for a low noise 750 MHz ytterbium-doped fiber frequency comb is developed with a repetition rate stabilized to a continuous wave laser by employing a bulk electro-optic modulator. By managing the dispersion prior to the nonlinear amplifier, the proposed high-power frequency comb light source can deliver over 10 W of <90 fs pulse trains with an integrated relative intensity noise instability of 0.04%. Moreover, the noise characteristics of the proposed amplified comb, where the seed laser is a tightly stabilized 750 MHz fiber frequency comb, are analyzed in several representative states of different launched pump powers and pre-chirping group delay dispersions. The optical fiber frequency combs produced by nonlinear amplification may serve as an alternative for achieving high-power and ultrafast combs with good phase stability.
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