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We report intra-cavity average power upscaling of a Kerr lens mode-locked ring oscillator to 1060 W. Obtained pulse energy of 68 μJ is the highest inside a ring-type oscillator, to the best of our knowledge.
We report a Kerr lens mode-locked Yb:Lu2O3 ceramic oscillator with a pulse energy of 23.5 nJ, which is the highest value in bulk Yb:Lu2O3 ceramic oscillators, to the best of our knowledge.
We have generated 1-mJ pulses with a pulse duration of 520 fs at a repetition rate of 2.85 MHz in a mode-locked oscillator cavity. These pulses can be used for generating high-harmonics in the cavity.
We report generation of 860 W average power, 440 fs pulses in a 15.2 MHz thin-disk ring oscillator by placing a Kerr lens mode-locking setup in a low-pressure chamber.
We have generated 16-MHz, 413-fs pulses with an average power of 600 W in a Kerr lens mode-locked thin-disk ring oscillator under development for intra-cavity high-order harmonic generation.
We have generated 15.8-MHz, sub-400-fs pulses with a power of 460 W in a thin-disk ring oscillator under development for intra-cavity high-order harmonic generation (HHG).
We have investigated the vibrational wave-packet dynamics of hydrogen molecular ions by the pump-probe measurement using sub-10-fs harmonic pulses. The wave-packet evolution is observed in the time-dependent fragment kinetic energy distribution.
Interferometric autocorrelation of a-few-pulse attosecond pulse was measured with single-shot velocity map imaging ion spectrometer using two-photon dissociative ionization process of N2 and the variation of angular distribution of N+ is controlled within 200 attoseconds.
Real-time measurement of ultrafast wave-packet dynamics has been possible with advances in short pulse laser technology. The vibrational wave-packet motion of molecular hydrogen ions, H2+ or D2+, is one of the simple models investigated experimentally using ultrashort laser pulses, a few-cycle Ti: sapphire laser pulse [1], high harmonic generation pulse [2,3], and extreme ultraviolet (XUV) free-electron...
We have generated 16.5-MHz, 400-fs pulses with a power of 490 W in a thin-disk ring oscillator under development for intra-cavity high-order harmonic generation.
We found a significant difference between the interferometric fringes on the intensity-autocorrelation and those on anisotropy-autocorrelation of an atttosecond pulse train. This result can discriminate multiple two-photon processes ionizing a nitrogen molecule.
We report on the development of a multi-TW laser system with a pulse duration of 12 fs and an a repetition rate of 100 Hz. This laser system is applied to generate intense high-order harmonic fields with loosely focused geometry.
We have concentrated on studying nonlinear interaction of a simple atom or molecule with VUV/XUV high-order harmonic (HOH) fields without help of intense visible laser field[1]. This is owing to the fact that the pulse energy of an attosecond pulse train (APT) synthesized with the HOH fields is sufficiently high due to our original scheme of HOH generation with loosely focused geometry. Nevertheless,...
We have observed periodical frequency modulation of high-order harmonics by changing the delay between the driving two-color laser fields, for the first time. The amplitude of the modulation has been up to ∼0.4 eV.
We have developed a laser system generating high peak-power ultrashort pulses based on the chirped pulse amplification of a Ti:sapphire laser. The pulse duration of the laser is reduced to 12 fs, owing to the successful compensation of gain narrowing during amplification with novel optics. The pulse energy and the repetition rate are 40 mJ and 100 Hz, respectively, as a consequence of sufficient energy...
We have demonstrated the direct amplification of 12-fs pulses in a terawatt-class CPA system of Ti:Sapphire laser. Spectral narrowing during amplification is successfully compensated by regenerative pulse shaping featuring a specially designed partial mirror.
We have demonstrated the direct amplification of 12-fs pulses in a terawatt-class CPA system of Ti:Sapphire laser. Spectral narrowing during amplification is successfully compensated by regenerative pulse shaping featuring a specially designed partial mirror.
We have demonstrated the direct amplification of 12-fs pulses in a terawatt-class CPA system of Ti:sapphire laser. Spectral narrowing during amplification is successfully compensated by regenerative pulse shaping featuring a specially designed partial mirror.
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