Characterization of the photo-injector laser and laser transport for the production of short electron bunches at FLUTE

At the Ferninfrarot Linac and Test Experiment (FLUTE), which is currently under construction at KIT, a photo-injector gun system is used to generate electron bunches with different charges. The pulses from the gun laser have to be transported over a distance of around 35 m from the laser lab to the electron gun via image relay. For an optimized laser transport the transversal and longitudinal size of the laser pulses are important. In this contribution we present the characteristics of the photo injector laser and the planned laser transport.