Generation and applications of phase-locked white-light continuum pulses

We report on an experiment demonstrating the high degree of mutual phase co herence between two white-light continuum pulses independently generated by phase-locked ultrashort laser pulses, We show that these secondary pulses are locked in phase and exhibit surprisingly clear and stable Young's inter ference fringes when overlapped on a screen in the far field. We discuss th e use of such phase-locked continuum pulses in the realization of a new kin d of ultrabroad frequency comb for absolute frequency measurements througho ut the visible spectrum.