Showing papers by "Ferenc Krausz published in 1993"
TL;DR: The oscillator presented has the potential for producing sub-10-fs pulses in the 800-nm wavelength region, and the position of the dispersive resonance is used to determine the ratio of the net second- and third-order intracavity dispersions.
Abstract: We report the operating characteristics of a self-mode-locked Ti:sapphire solitary laser at reduced group-delay dispersion. The generation of ≈12.3 fs near-sech2 optical pulses at 775 nm is reported, together with experimental evidence for the dominant role of third-order dispersion (TOD) as a limiting factor to further pulse shortening in the oscillator. At reduced second-order dispersion excessive residual TOD is shown to lead to dispersive wave generation, and the position of the dispersive resonance is used to determine the ratio of the net second- and third-order intracavity dispersions. Since the magnitude of TOD rapidly decreases with increasing wavelength in prism-pair dispersion-compensated resonators, the oscillator presented has the potential for producing sub-10-fs pulses in the 800-nm wavelength region.
140 citations
TL;DR: Theoretical results are in good qualitative and quantitative agreement with previously reported experimental observations and measurements on standing-wave laser oscillators.
Abstract: In standing-wave laser oscillators the field energy density periodically varies along the resonator axis and creates a complex refractive-index grating in the gain medium. This grating couples the originally independent counterpropagating waves of the individual axial cavity modes. The coupling induces a mode frequency shift that is a nonlinear function of the unperturbed mode frequency. The uneven shifts can give rise to a substantial broadening of the beat-note linewidth of the multi-axial-mode free-running laser and to a corresponding increase in the threshold intracavity power for self-starting passive mode locking. The theoretical results are in good qualitative and quantitative agreement with previously reported experimental observations and measurements.
49 citations
TL;DR: In this article, the periodic variation of femtosecond pulse characteristics within a mode-locked Ti: sapphire laser was investigated and it was demonstrated that both the laser bandwidth and the pulse duration are functions of position within the laser cavity.
Abstract: The periodic variation of femtosecond pulse characteristics within a mode-locked Ti: sapphire laser is investigated. By measurement of the output pulse characteristics at the dispersive and the nondispersive ends of a femtosecond Kerr-lens mode-locked laser cavity, it has been demonstrated that both the laser bandwidth and the pulse duration are functions of position within the laser cavity. A qualitative argument is also presented that predicts near-bandwidth-limited pulses at the cavity extremes, and this prediction is confirmed by experiment.
9 citations
TL;DR: A frequency-selective method is suggested for the measurement of the length of an ultrafast x-ray pulse by measuring the intensity of an inelastically scattered narrow-band fraction of the x-rays pulse at different delays of the probe pulse of an intense laser.
Abstract: The effect of laser fields of intermediately high intensity on the inelastic scattering of x-ray radiation below an absorption edge is theoretically investigated The results obtained suggest a frequency-selective method for the measurement of the length of an ultrafast x-ray pulse by measuring the intensity of an inelastically scattered narrow-band fraction of the x-ray pulse at different delays of the probe pulse of an intense laser
5 citations
01 Jan 1993
4 citations