W. Kornelis
École Polytechnique Fédérale de Lausanne
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Publication
Featured researches published by W. Kornelis.
Optics Letters | 2004
Christoph P. Hauri; M. Bruck; W. Kornelis; Jens Biegert; Ursula Keller
We demonstrate amplification and compression of 110-nm broad spectra in a spatially dispersed amplifier for what is believed to be the first time and generate 14.8-fs pulses with 450 microJ of energy at a repetition rate of 1 kHz. The amplifier concept is scalable in energy and allows for spectral shaping, which was demonstrated and compared with numerical simulations and showed excellent agreement.
quantum electronics and laser science conference | 2005
Arne Heinrich; Christoph P. Hauri; W. Kornelis; Marcel P. Anscombe; Christian Erny; Florian W. Helbing; Philip Schlup; Jens Biegert; Ursula Keller
We generated a nearly isolated high harmonic in several-centimeter long capillaries filled with argon and studied the dependence of the selectivity of high harmonic generation on the pressure and gas species.
quantum electronics and laser science conference | 2005
Christoph P. Hauri; W. Kornelis; Florian W. Helbing; Arne Heinrich; Marcel P. Anscombe; Philip Schlup; Arnaud Couairon; A. Mysyrowicz; Jens Biegert; Ursula Keller
Self-compression of a CEO phase-locked 43 fs, 0.84 mJ pulse during filamentation leads to a CFO-phase locked 5.7-fs, 0.38-mJ pulse with an excellent spatial mode. The obtained pulse bandwidth exceeds 600 THz theoretically 1.8-fs pulses.
quantum electronics and laser science conference | 2005
Christoph P. Hauri; Arne Heinrich; W. Kornelis; Marcel P. Anscombe; Philip Schlup; Arnaud Couairon; A. Mysyrowicz; Jens Biegert; Ursula Keller
Selective high-order harmonic generation by filamentation of an intense laser pulse in various gases is demonstrated and depending on gas choice and pressure, wavelength-dependent enhancement and extinction of specific harmonics is observed.
quantum electronics and laser science conference | 2005
W. Kornelis; Arne Heinrich; Christoph P. Hauri; Florian W. Helbing; M. P. Anscombe; Philip Schlup; J. W. G. Tisch; Jens Biegert; Ursula Keller
Frequency-sheared and time-separated high harmonics were produced without spatial separation in the target gas by controlling the time-frequency properties of the driving field. Simulations show good agreement within the strong-field approximation.
conference on lasers and electro optics | 2005
A. Heinrich; C.P. Mauri; W. Kornelis; Philip Schlup; M.P. Anscombe; Jens Biegert; U. Keller; K. J. Schafer; Mette B. Gaarde
We present a first experiment on attosecond pulse train (APT) assisted high-order harmonic generation, where the APT triggers the release of the electron into the continuum, which leads to an enhancement of harmonic yield.
conference on lasers and electro optics | 2005
Christoph P. Hauri; W. Kornelis; Jens Biegert; U. Keller; Arnaud Couairon; A. Mysyrowicz
Intense 5.7-fs pulses are generated through twofold filamentation in argon. Beyond beam quality and fluctuation measurements the system reliability is verified by scans of the initial laser chirp and gas pressures in the interaction chambers
conference on lasers and electro optics | 2005
W. Kornelis; Christoph P. Hauri; A. Heinrich; Florian W. Helbing; M.P. Anscombe; Philip Schlup; J. W. G. Tisch; Jens Biegert; U. Keller
Frequency-sheared, time-delayed XUV pulses were produced using high harmonic generation by shaping the time-frequency properties of the generating electric field. A simulation confirmed the direct link between generating field and harmonic properties.
conference on lasers and electro optics | 2005
Christoph P. Hauri; A. Heinrich; W. Kornelis; Jens Biegert; U. Keller; Arnaud Couairon; A. Mysyrowicz
Filamentation of intense laser pulses in various gases is demonstrated to generate selectively high-order harmonics. Wavelength-dependent enhancement and extinction of specific harmonics is controlled by gas choice and variation of gas pressure.
Springer series in chemical physics | 2005
Jens Biegert; Christoph P. Hauri; W. Kornelis; Arne Heinrich; Florian W. Helbing; Arnaud Couairon; A. Mysyrowicz; Ursula Keller
A novel technique for the generation of intense few-cycle pulses is presented. Based on filamentation an intense CEO-stabilized 43-fs laser pulse yields a supercontinuum, supporting 1.8 fs pulses with a spectral range covering more than 600 THz. Chirped-mirror compression yields 5.7-fs pulses with 0.38 mJ energy in an excellent mode, with the CEO phase-lock being preserved.
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