  We report on the characterization of a commercial-core fiber-based frequency
comb equipped with an intracavity electro-optic modulator (EOM). We investigate
the relationship between the noise of the pump diode and the laser relative
intensity noise (RIN) and demonstrate the use of a low noise current supply to
substantially reduce the laser RIN. By measuring several transfer functions, we
evaluate the potentiality of the EOM for comb repetition rate stabilization. We
also evaluate the coupling to other relevant parameters of the comb. From these
measureemnts, we infer the capabilities of the femtosecond laser comb to
generate very low phase noise microwave signals when phase locked to a high
spectral purity ultra-stable laser.
