The FILCO project concept is to create a novel 1 µm wavelength specific laser cutting head, capable of cutting up to 15mm thick stainless steel, with cut quality similar or better than that currently achieved with CO2 laser cutting systems. In addition, aim will also be to increase the available cutting speeds in the thickness range between 3 and 15mm. These goals will be realised through the development of new beam forming optics and supersonic assist gas nozzles.