In NSRRC, we set up a superradiant free electron laser in terahertz frequency range by employing an in-house developed laser-driven photocathode radio frequency electron gun system and a technology called radio frequency electron bunch compression. It is currently the terahertz radiation source with the highest peak power in Taiwan. In addition, we also designed an extreme ultraviolet free electron laser test facility that is based on similar technology. These light sources can be applied significantly to research fields such as semiconductors, quantum materials, and biomedicine.