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Testing ultrafast mode-locking at microhertz relative optical linewidth
Michael J. Martin, Seth M. Foreman, T. R. Schibli +1
We report new limits on the phase coherence of the ultrafast mode-locking process in an octave-spanning Ti:sapphire comb. We find that the mode-locking mechanism correlates optical…
Cavity-enhanced direct frequency comb spectroscopy
Michael J. Thorpe, Jun Ye
Cavity-enhanced direct frequency comb spectroscopy combines broad spectral bandwidth, high spectral resolution, precise frequency calibration, and ultrahigh detection sensitivity,…
Efficient output coupling of intracavity high harmonic generation
D. C. Yost, T. R. Schibli, Jun Ye
We demonstrate a novel technique for coupling XUV harmonic radiation out of a femtosecond enhancement cavity. We use a small-period diffraction grating etched directly into the sur…
Tapered semiconductor amplifiers for optical frequency combs in the near infrared
Flavio C. Cruz, Matthew C. Stowe, Jun Ye
A tapered semiconductor amplifier is injection seeded by a femtosecond optical frequency comb at 780 nm from a mode-locked Ti:sapphire laser. Energy gains over 17 dB (12 dB) are ob…