The diode pumped laser marking systems made by the ACI Laser GmbH have been developed for complying with important market demands: This is the integration of all optical, electronic and mechanical components in one housing. Alternative solutions for water cooling, fibre optical connections and costly electrical supply units have been used. The integrated thermo-electrical cooling system avoids costs, space and maintenance for additional supply and cooling systems and with this it provides for stable operation of the solid-state lasers. This results in an enormous reduction of operating costs.