Phase-coherent synthesis of optical frequencies and waveforms RID C-3312-2011 RID B-4974-2009 RID F-4701-2010 RID D-3425-2011

TitlePhase-coherent synthesis of optical frequencies and waveforms RID C-3312-2011 RID B-4974-2009 RID F-4701-2010 RID D-3425-2011
Publication TypeJournal Article
Year of Publication2002
AuthorsYe, J., S. T. Cundiff, S. Foreman, TM Fortier, J. L. Hall, KW Holman, D. J. Jones, JD Jost, HC Kapteyn, KAHV Leeuwen, LS Ma, MM Murnane, JL Peng, and RK Shelton
JournalApplied Physics B-Lasers and Optics
PaginationS27-S34 - S27-S34
Date Published2002/06//
ISBN Number0946-2171
Keywordsclock, comb, evolution, femtosecond laser, hg-199(+), light, microwave, Mode-locked lasers, pulse generation, ti-sapphire laser
AbstractPrecision phase control of an ultrawide-bandwidth optical-frequency comb has produced remarkable and unexpected progress in both areas of optical-frequency metrology and ultrafast optics. A frequency comb (with 100 MHz spacing) spanning an entire optical octave (> 300 THz) has been produced, corresponding to millions of marks on a frequency "ruler" that are stable at the Hz level. The precision comb has been used to establish a simple optical clock based on an optical transition of iodine molecules, providing an rf clock signal with a frequency stability comparable to that of an optical standard, and which is superior to almost all conventional rf sources. To realize a high-power cw optical frequency synthesizer, a separate, widely tunable single-frequency cw laser has been employed to randomly access the stabilized optical comb and lock to any desired comb component. Carrier-envelope phase stabilization of few-cycle optical pulses has recently been realized. This advance in femtosecond technology is important for both extreme non-linear optics and optical-frequency metrology. With two independent femtosecond lasers, we have not only synchronized their relative pulse timing at the femtosecond level, but have also phase-locked their carrier frequencies, thus establishing phase coherence between the two lasers. By coherently stitching the optical bandwidth together, a "synthesized" pulse has been generated with its 2nd-order autocorrelation signal displaying a shorter width than those of the two "parent" lasers.
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