For medical applications of XeCl excimer lasers the performance of the fiber optical beam deliver... more For medical applications of XeCl excimer lasers the performance of the fiber optical beam delivery system is of great importance. Especially for an efficient ablation of hard tissue in laser surgery high energy densities at the distal fiber end are necessary. The upper limit for the pulse energy, which can be guided through the fused silica fiber is limited by the surface damage threshold. However, even at lower pulse energies photodegradation effects which change the transmission properties have to be taken into account. Transmission losses increase with laser pulse energy, laser repetition rate and fiber length and decrease with laser pulse duration. During irradiation interruptions the fiber transmission recovers at least partly.
Emerging Digital Micromirror Device Based Systems and Applications IV, 2012
ABSTRACT Digital Micromirror Device based microscopy combines fast confocal 4D-microscopy along w... more ABSTRACT Digital Micromirror Device based microscopy combines fast confocal 4D-microscopy along with conventional methods for light microscopy and new technological approaches to a versatile tool for the observation of in vivo processes in living biological cells and measurement of technical surfaces. Due to the use of variable size pinholes and adjustable scan patterns conditions for confocal measurement can easily be optimized to the prerequisites of the sample "on the fly".
We request access to stable beams of K, Cu, and Zn during CERN long shutdown 2 (LS2), in order to... more We request access to stable beams of K, Cu, and Zn during CERN long shutdown 2 (LS2), in order to develop efficient laser-polarization schemes to be later applied to radioactive isotopes of the above chemical elements. The letter will be studied using the beta-gamma and beta-gamma-neutron correlations and -NMR techniques. The development will take place at the laser-polarization beamline, where the degree of nuclear spin polarization of stable nuclei will be determined using the fluorescence polarization-checking setup, which is presently under development. The first motivation comes from the nuclear structure studies, where correlation studies will allow determining spins and parities of excited states in neutron-rich Cu and Zn isotopes, and the -NMR studies will give access to quadrupole moments of neutron-rich K nuclei. The second goal is related to the interaction of metal ions such as K, Cu, or Zn with nucleic acids and proteins, whose investigation can largely profit from th...
The invention relates to a method for the thermal treatment of a surface layer (4) on a semicondu... more The invention relates to a method for the thermal treatment of a surface layer (4) on a semiconductor substrate (5). Laser pulses (2) generated by a laser (1) are emitted onto the surface layer (4). This method can be used to produce, in particular, ohmic contacts to III-V compound semiconductors.
Nuclear spins and moments of 9Li and 11Li have been measured by optical pumping of a fast atomic ... more Nuclear spins and moments of 9Li and 11Li have been measured by optical pumping of a fast atomic beam. The angular asymmetry of the beta-radiation from the polarized nuclei was used to detect the hfs of the 2s 2S1/2-2p 2P1/2 resonance line and the NMR signal in a LiF or LiNbO3 crystal. The results I=3/2 and muI=3.6673(25) n.m. indicate a
For medical applications of XeCl excimer lasers the performance of the fiber optical beam deliver... more For medical applications of XeCl excimer lasers the performance of the fiber optical beam delivery system is of great importance. Especially for an efficient ablation of hard tissue in laser surgery high energy densities at the distal fiber end are necessary. The upper limit for the pulse energy, which can be guided through the fused silica fiber is limited by the surface damage threshold. However, even at lower pulse energies photodegradation effects which change the transmission properties have to be taken into account. Transmission losses increase with laser pulse energy, laser repetition rate and fiber length and decrease with laser pulse duration. During irradiation interruptions the fiber transmission recovers at least partly.
Emerging Digital Micromirror Device Based Systems and Applications IV, 2012
ABSTRACT Digital Micromirror Device based microscopy combines fast confocal 4D-microscopy along w... more ABSTRACT Digital Micromirror Device based microscopy combines fast confocal 4D-microscopy along with conventional methods for light microscopy and new technological approaches to a versatile tool for the observation of in vivo processes in living biological cells and measurement of technical surfaces. Due to the use of variable size pinholes and adjustable scan patterns conditions for confocal measurement can easily be optimized to the prerequisites of the sample "on the fly".
We request access to stable beams of K, Cu, and Zn during CERN long shutdown 2 (LS2), in order to... more We request access to stable beams of K, Cu, and Zn during CERN long shutdown 2 (LS2), in order to develop efficient laser-polarization schemes to be later applied to radioactive isotopes of the above chemical elements. The letter will be studied using the beta-gamma and beta-gamma-neutron correlations and -NMR techniques. The development will take place at the laser-polarization beamline, where the degree of nuclear spin polarization of stable nuclei will be determined using the fluorescence polarization-checking setup, which is presently under development. The first motivation comes from the nuclear structure studies, where correlation studies will allow determining spins and parities of excited states in neutron-rich Cu and Zn isotopes, and the -NMR studies will give access to quadrupole moments of neutron-rich K nuclei. The second goal is related to the interaction of metal ions such as K, Cu, or Zn with nucleic acids and proteins, whose investigation can largely profit from th...
The invention relates to a method for the thermal treatment of a surface layer (4) on a semicondu... more The invention relates to a method for the thermal treatment of a surface layer (4) on a semiconductor substrate (5). Laser pulses (2) generated by a laser (1) are emitted onto the surface layer (4). This method can be used to produce, in particular, ohmic contacts to III-V compound semiconductors.
Nuclear spins and moments of 9Li and 11Li have been measured by optical pumping of a fast atomic ... more Nuclear spins and moments of 9Li and 11Li have been measured by optical pumping of a fast atomic beam. The angular asymmetry of the beta-radiation from the polarized nuclei was used to detect the hfs of the 2s 2S1/2-2p 2P1/2 resonance line and the NMR signal in a LiF or LiNbO3 crystal. The results I=3/2 and muI=3.6673(25) n.m. indicate a
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