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Journals and Conferences
General restrictions arising from gain-narrowing and phase-matching are circumvented by employing parametric amplification in the frequency rather than the time domain. Frequency-domain OPA has been used for amplifying few-cycle pulses and for high gain amplification.
The powerful technique of optical parametric amplification (OPA) experienced a huge advance with the invention of optical parametric chirped pulse amplification (OPCPA) and later noncollinear OPA. In this paper, we describe a radically different approach of performing parametric interaction in the frequency domain instead of the time domain. The frequency… (More)
The total cross section for ω production in the pp → ppω reaction has been measured at five c.m. excess energies from 3.8 to 30 MeV. The energy dependence is easily understood in terms of a strong proton-proton final state interaction combined with a smearing over the width of the state. The ratio of near-threshold φ and ω production is consistent with the… (More)
Double differential cross sections d 2 σ/dpdΩ have been measured for π + and K + emitted around midrapidity in d+A and α+A collisions at a beam kinetic energy of 1.15 GeV/nucleon. The total π + yield increases by a factor of about 2 when using an alpha projectile instead of a deuteron whereas the K + yield increases by a factor of about 4. According to… (More)
800nm, nJ level pulses are amplified >2.000 times in a single 2mm BBO crystal, pumped by picosecond 400nm pulses. Experiments evidence that the picosecond pulse contrast within the pump window remains unchanged upon amplification.
Employing parametric amplification in the Fourier domain rather than in time domain circumvents phase mismatch and damage threshold limitations of laser amplifiers and enabled CEP stable, 1.43mJ, sub-two cycle pulses at 1.8μm.
Signals of two narrow structures at M=1747 MeV and 1772 MeV were observed in the invariant masses MpX and M π + X of the pp→ppX and pp→pπ + X reactions respectively. Many tests were made to see if these structures could have been produced by experimental artefacts. Their small widths and the stability of the extracted masses lead us to conclude that these… (More)
The cross section and tensor analysing power t20 of the ~ d d → He η reaction have been measured at six c.m. momenta, 10 ≤ pη ≤ 90 MeV/c. The threshold value of t20 is consistent with 1/ √ 2, which follows from parity conservation and Bose symmetry. The much slower momentum variation observed for the reaction amplitude, as compared to that for the analogous… (More)