Present status of the development of an infrared free-electron laser at the Institute of Scientific and Industrial Research, Osaka University

A free-electron laser with a 38-MeV L-band electron linear accelerator was developed at the Institute of Scientific and Industrial Research, Osaka University. The self-amplified spontaneous emission was observed at wavelengths of 20 and 40 μm with a high-intensity single-bunch beam passing through a wiggler. In the oscillation experiments with a multibunch beam laser light has been obtained at wavelengths from 30 to 120 μm. The peak power in a micropulse of the laser is estimated to be 8.3 MW at a wavelength of 40 μm. The FEL light will be applied to the basic researches in various fields. (author)