While the Disk laser concept was invented in the early 90s, the first industrial products were
available in the beginning of this decade. Since then, the disk laser is used in mass production
and serves a large variety of application fields. The output power per disk has continually
increased and reached a level of 2.5 kW per disk in 2007. As of today, the disk principle has not
reached any fundamental limit regarding output power per disk or beam quality, and offers many
advantages over other high power resonator architectures.
In early 2009 TRUMPF released a new series of industrial disk lasers. This series is based on
an output power of 4 kW per disk. Scalability of output power is achieved by serial coupling of
several disks without influencing the beam quality of the system, with output powers of up to 16
kW at work piece. The new TruDisk laser series has incorporated several advancements
compared to older generation disk lasers, which have allowed a considerable reduction of
running cost, investment cost and footprint.
This paper will explain important details of the TruDisk laser series and process relevant
features of the system, like pump diode arrangement, resonator design and integrated beam
guidance. In addition, advances in applications in the thick sheet area and very cost efficient
high productivity applications like remote welding, remote cutting and cutting of thin sheets will