Sub-10-fs-Laserpulse für die Zwei-Photonen-Polymerisation

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Superresolved femtosecond laser nanosurgery of cells

We report on femtosecond nanosurgery of fluorescently labeled structures in cells with a spatially superresolved laser beam. The focal spot width is reduced using phase filtering applied with a programmable phase modulator. A comprehensive statistical analysis of the resulting cuts demonstrates an achievable average resolution enhancement of 30 %

Double waveguide couplers produced by simultaneous femtosecond writing

We report on a novel method to create waveguide coupler devices in fused silica by combining the technique of beam shaping with femtosecond laser writing. The method is based on a programmable phase modulator and a dynamic variation of the phase-pattern during the writing process. The major advantage is the possibility to create complex devices in a single sweep by simultaneously writing two or more waveguides with changing separation. The guiding properties and the coupling behavior between the waveguides are investigated

340W Femtosecond Burst-mode Non-collinear Optical Parametric Amplifier for the European XFEL Pump-probe-laser

The burst-mode NOPA produces up to 340W burst-power and 1.57mJ single pulse energy at rep-rates between 188kHz and 4.5MHz. The pulses are compressible to <15fs and the output beam at 800nm is diffraction limited

Flexible burst-mode ultrafast pump-probe laser for user experiments at the European X-Ray Free-Electron Laser Facility

We present the concept and development status of our pump-probe laser to be installed at experimental stations of the European XFEL. To date, features such as burst-mode operation with intra-burst frequencies up to 4.5MHz and arbitrary pulse selection are demonstrated at single pulse energies up to 180µJ and 15fs pulsewidth

Status of Pump-probe Laser Development for the European XFEL

The European XFEL is under construction and is designed to become a multi-user facility. Three SASE beam lines with two experimental areas each are foreseen to guarantee a high user throughput. In order to enable the full scientific potential of the facility, optical laser pulses for either pumping or probing samples will be deployed regularly. We are presenting the pump-probe laser concept and the current status of the development, showing some experimental results of the prototype laser, achieved to date. The main emphasis of the presentation lies on the integration of the laser system into Karabo, the emerging control system of the European XFEL