Residual phase-noise measurements of actively mode-locked fiber and semiconductor lasers

We report residual phase-noise measurements of both actively mode-locked fiber and semiconductor lasers using sinusoidal mode-locking frequencies between 500 MHz and 5 GHz. The fiber laser is a polarization maintaining erbium-doped fiber ring laser that is harmonically mode-locked using a sinusoidal drive signal. The mode-locked semiconductor laser uses an external cavity configuration.