A laser system providing tunable, narrow-band radiation from 35 nm to 2 mum

We describe a laser system that readily provides radiation tunable from 2 m um in the infra-red to 35 nm in the extreme ultraviolet spectral range. The broad spectral range is covered through a range of non-linear processes su ch as Raman shifting and high-order harmonic generation. Pulses with durati on of tens of picoseconds are obtained. The relative bandwidth of the radia tion is delta lambda/lambda = 10(-4), comparable with what can be achieved by using high-resolution monochromators at state-of-the-art synchrotron bea mlines. We discuss different methods for characterising the radiation in th is wide wavelength regime. We also discuss the capabilities of the system f rom the measured parameters.