The Photo Injector Test Facility at DESY, Zeuthen site was built in order to test and to optimize sources of high brightness electron beams for future free electron lasers (FELs) and linear colliders. The focus at PITZ is on the production of intense electron beams with very small transverse emittance and reasonably small longitudinal emittance which are required in order to meet the high-gain conditions of FEL operation. We meet this challenge by applying the most advanced techniques in combination with key parameters of projects based on TESLA technology like FLASH and the European XFEL.