A heavy water target system for high repetition rate multi-TW lasers as deuteron source will be presented. This self-regenerated ultrathin liquid leaf surface composed from two liquid jets collided from nozzles of 11 um. At the current state of the development, a stable leaf with a length of 1.5 mm is maintained in 10E-4 mbar vacuum. The thickness of the liquid sheet is <200 nm, measured from the modulation of the spectrally resolved interference arising from white light reflection on the front and the back surfaces of the liquid sheet.
Dispersion measurements on a birefringent hollow-core (HC-800-02) and a solid-core (LMA-PM-5) photonic crystal fiber (PCF) are presented using a windowed Fourier-transform (WFT) spectral interferometric method. We investigate the optimal value of the spectral window function of the WFT method to reach the highest accuracy in the dispersion measurement. This requires the knowledge of the precise position of the polarization axes of the fibers. In order to determine the position of the polarization axes we have developed a method based on analyzing the WFT signals, which were obtained from a series of interferograms at different excitation ratios of the polarization modes of the PCFs.
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